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Band alignment and surface photo-voltage analysis of c-Si/SiOx/poly-silicon passivatingcontact stacks through X-ray photoelectron spectroscopy
Article Year: 2024
Authors: Areej Alzahrani, George T. Harrison, Thomas G. Allen, Michele De Bastiani, Arsalan Razzaq, Emmanuel Van Kerschaver, Stefaan DeWolf
  • X-ray photoelectron spectroscopy (XPS)
  • silicon
  • tunnel oxide passivating contacts
Four-Terminal Perovskite/Perovskite/SiliconTriple-Junction Tandem Solar Cells with over30% Power Conversion Efficiency
Article Year: 2024 DOI:https://pubs.acs.org/doi/epdf/10.1021/acsenergylett.4c01292
Authors: Fuzong Xu, Stefaan DeWolf, Jiang Liu, Lujia Xu, Arsalan Razzaq, Xuechun Zhang
  • Perovskite/Perovskite/Silicon Triple-Junction Tandem
Mitigating Delamination in Perovskite/Silicon Tandem Solar Modules
Article Year: 2024 DOI:https://doi.org/10.1002/solr.202400289
Authors: Helen Bristow, Xiaole Li, Maxime Babics, Sofiia Kosar, Anil Reddy Pininti, Shanshan Zhang, Badri Vishal, Shruti Sarwade, Arsalan Razzaq, Ahmed Ali Said, Gilles Lubineau, Stefaan DeWolf
  • perovskite /silicon tandem
  • mechanical stability
  • delaminations
Enhanced cation interaction in perovskites for efficient tandem solar cells with silicon
Article Year: 2024 DOI:https://www.science.org/doi/10.1126/science.adp1621
Authors: Esma Ugur, Ahmed A. Said, Pia Dally, Shanshan Zhang, Christopher E. Petoukhoff, Diego Rosas Villalva, Shynggys Zhumagali, Bumin Kagan Yildirim, Arsalan Razzaq, Shruti Sarwade, Aren Yazmaciyan, Derya Baran, Frederic Laquai, Caner Dener, IIhan Yavuz, Thomas Allen, Erkan Aydin, Stefaan DeWolf
  • Perovskite photovoltaics
  • tandem solar Cells
  • monolithic perovskite/silicon tandem solar cells
Monolithic perovskite/perovskite/silicon triple-junction solar cells with cation double displacement enabled 2.0 eV perovskites
Article Year: 2024 DOI:https://doi.org/10.1016/j.joule.2023.11.018
Authors: Fuzong Xu, Erkan Aydin, Jiang Liu, Esma Ugur, George T. Harrison, Lujia Xu, Badri Vishal, Bumin K.  Yildirim, Mingcong Wang, Roshan Ali, Anand S. Subbiah, Aren Yazmaciyan, Shynggys Zhumagali, wenbo Yan, Yajun Gao, Zhaoning Song, Chongwen Li, Sheng Fu, Bin Chen, Atteq ur Rehman, Maxime Babics, Arsalan Razzaq, Michele De Bastiani, Thomas G. Allen, Udo Schwingenschlögl, Yanfa Yan, Frédéric Laquai, Edward H. Sargent, Stefaan De Wolf
  • triple-junction tandem solar cells
  • light-induced phase segregation
  • Wide bandgap perovskites
  • additive  engineering
  • high-voltage solar cells
Sublimed C60 for efficient and repeatable perovskite-based solar cells
Article Year: 2024 DOI:https://doi.org/10.1038/s41467-024-44974-0
Authors: Ahmed A. Said, Erkan Aydin, Esma Ugur, Zhaojian Xu, Caner Dener, Badri Vishal, Aleš Vlk, Pia Dally, Bumin K.  Yildirim, Randi Azmi, Jiang Liu, Edward A. Jackson, Holly M. Johnson, Manting Gui, Henning Richter, Anil R.Pininti, Helen Bristow, Maxime Babics, Arsalan Razzaq, Thomas G Allen, Martin Ledinský, Ilhan Yavuz, Barry P. Rand, Stefaan De Wolf
Nonfullerene Self-Assembled Monolayers As Electron-Selective Contacts for n-i-p Perovskite Solar Cells
Article Year: 2024 DOI:https://doi.org/10.1021/acsenergylett.4c00306
Authors: Drajad Satrio Utomo, Lauryna M. Svirskaite, Adi Prasetio, Vida Malinauskiene, Pia Dally, Erkan Aydin, Artem Musiienko, Vytautas Getautis, Tadas Malinauskas, Randi Azmi, Stefaan De Wolf
  • organic-inorganic perovskite
  • electron-selective contact
  • Bufer layers
Capillary Manganese Halide Needle-Like Array Scintillator with Isolated Light-Crosstalk for Micro-X-Ray Imaging
Research Article Year: 2024 DOI:https://doi.org/10.1002/adma.202312053
Authors: Wenyi Shao, Tengyue He, Lijie Wang, Jian-Xin Wang, Yang Zhou, Bingyao Shao, Esma Ugur, Wentao Wu, Zhenzhong Zhang, Hongwei Liang, Stefaan De Wolf, Osman M. Bakr, Omar F. Mohammed
  • Metal halide scintillator
  • Micro-X-ray imaging
  • needle-like array
Unraveling Bulk versus Surface Passivation Effects in Highly Efficient p-i-n Perovskite Solar Cells Using Thiophene-Based Cations
Article Year: 2024 DOI:https://doi.org/10.1002/solr.202300681
Authors: Giovanni Pica, Riccardo Montecucco, Andrea Zanetta, Aleksandra Oranskaia, Fabiola Faini, Lorenzo Pancini, Nada Mrkyvkova, Peter Siffalovic, Pia Dally, Valentina Pirota, Martin Ledinsky, Michele De Bastiani, Stefaan De Wolf, Filippo Doria, Udo Schwingenschlögl, Giulia Grancini
  • 2D/3D heterostructure
  • bulk passivation
  • perovskite solar cells
  • surface passivation
  • thiophene-based passivants
Cs-Doped and Cs-S Co-Doped CuI p-Type Transparent Semiconductors with Enhanced Conductivity
Article Year: 2024 DOI:https://doi.org/10.1002/adfm.202316144
Authors: Adeem S Mirza, Badri Vishal, Claudia S. Schnohr, Stefaan DeWolf, Monica Morales-Masis
  • Transparent Semiconductors
Oxygen Vacancy Mediation in SnO2 Electron Transport Layers Enables Efficient, Stable, and Scalable Perovskite Solar Cells
Article Year: 2024 DOI:https://doi.org/10.1021/jacs.4c03783
Authors: Qiangqiang Zhao, Bingqian Zhang, Wei Hui, Zhenhuang Su, Han Wang, Qi Zhang, Kun Gao, Xiaoxu Zhang
  • perovskite solar cells
  • stable perovskite solar cells
  • SnO2
Radiative cooling for vertical solar panels
Article Year: 2024 DOI:https://doi.org/10.1016/j.isci.2024.108806
Authors: Huangyu Fang, Lyu Zhou, Lujia Xu, Saichao Dang, Stefaan De Wolf, Qiaoqiang Gan
Impact of the valence band energy alignment at the hole-collecting interface on the photostability of wide band-gap perovskite solar cells
Article Year: 2024
Authors: Luis Victor Torres Merino, Christopher E. Petoukhoff, Oleksandr Matiash, Anand Selvin Subbiah, Carolina Villamil Franco, Pia Dally, Sofiia Kosar, Diego Rosas Villalva, Vladyslav Hnapovskyi, Esma Ugur, Sahil Shah, Francisco Peña Camargo, Orestis Karalis, Hannes Hempel, Igal Levine, Rakesh R. Pradhan, Suzana Kralj, Nikhil Kalasariya, Maxime Babics, Bumin Kagan Yildirim, Ahmed A. Said, Erkan Aydin, Helen Bristow, Subhashri Mannar, Waseem Raja, Anil Reddy Pininti, Adi Prasetio, Arsalan Razzaq, Hamza Al Naseer, Thomas Allen, Furkan H. Isikgor, Derya Baran, Thomas D. Anthopoulos, Monica Morales-Masis, Udo Schwingenschlögl, Thomas Unold, Martin Stolterfoht, Frédéric Laquai, Stefaan DeWolf
  • Perovskite
  • Wide band-gap
  • Self-assembled monolayers
  • halide segregation
  • photostability
  • hole transport layers
  • energy alignment
  • mixed SAM's
Enhancing the Performance of Blade-Coated Perovskite/Silicon Tandems via Molecular Doping and Interfacial Energy Alignment
Letter Year: 2024 DOI:https://doi.org/10.1021/acsenergylett.4c00070
Authors: Anand S. Subbiah, Luis V. Torres Merino, Anil R.Pininti, Vladyslav Hnapovskyi, Subhashri Mannar, Erkan Aydin, Arsalan Razzaq, Thomas G. Allen, Stefaan De Wolf
  • Layers
  • Perovskites
  • Power conversion efficiency
  • Solar cells
  • Thickness
Pathways toward commercial perovskite/silicon tandem photovoltaics
Rewiew Year: 2024 DOI:https://doi.org/10.1126/science.adh3849
Authors: Erkan Aydin, Thomas G. Allen, Michele De Bastiani, Arsalan Razzaq, Lujia Xu, Esma Ugur, Jiang Liu, Stefaan De Wolf
Imaging Locally Inhomogeneous Properties of Metal Halide Perovskites
Article Year: 2024 ISSN:ISSN:1521-4095
Authors: Sofiia Kosar, Stefaan DeWolf
  • Metal halide perovskites
  • Microscopic Techniques
  • Imaging Characterization
Practical Fill Factor Limits for Perovskite Solar Cells
Letter Year: 2024 DOI:https://pubs.acs.org/doi/10.1021/acsenergylett.4c02757?goto=supporting-info
Authors: Arsalan Razzaq, Asmat Ullah, Anand Selvin Subbiah, Stefaan De Wolf
  • Electrical properties
  • Extraction
  • recombination
  • Solar Cells
Efficient blade-coated perovskite/silicon tandems via interface engineering
Article Year: 2024
Authors: Anand Selvin Subbiah, Subhashri Mannar, Vladyslav Hnapovskyi, Anil R.Pininti, Badri Vishal, Luis Victor Torres Merino, Adi Prasetio, Thomas Unold, Frederic Laquai, Stefaan De Wolf
  • perovskite /silicon tandem
  • blade coating
  • monolithic tandems
  • interface modification
  • 2D passivation
Double-side 2D/3D heterojunctions for inverted perovskite solar cells
Article Year: 2024 ISSN:ISSN 1476-4687 (online) DOI:https://doi.org/10.1038/s41586-024-07189-3
Authors: Randi Azmi, Drajad Satrio Utomo, Badri Vishal, Shynggys Zhumagali, Pia Dally, Andi Muhammad Risqi, Adi Prasetio, Esma Ugur, Fangfang Cao, Imil Fadli Imran, Ahmed Ali Said, Anil Reddy Pininti, Anand Selvin Subbiah, Erkan Aydin, Chuanxiao Xiao, Sang Il Seok, Stefaan De Wolf
  • Double-side 2D/3D heterojunctions
Enhanced optoelectronic coupling for perovskite-silicon tandem solar cells
Article Year: 2023 DOI:https://doi.org/10.1038/s41586-023-06667-4
Authors: Erkan Aydin, Esma Ugur, Bumin K.  Yildirim, Thomas G. Allen, Pia Dally, Arsalan Razzaq, Fangfang Cao, Lujia Xu, Badri Vishal, Aren Yazmaciyan, Ahmed A. Said, Shynggys Zhumagali, Randi Azmi, Maxime Babics, Andreas Fell, Chuanxiao Xiao, Stefaan De Wolf
  • Solar cells
Below the Urbach Edge: Solar Cell Loss Analysis Based on Full External Quantum Efficiency Spectra
Letter Year: 2023 DOI:https://doi.org/10.1021/acsenergylett.3c00951
Authors: Jakub Holovsky, Katarína Ridzonová, Amalraj Peter Amalathas, Brianna Conrad, Rupendra Kumar Sharma, Xin Yu Chin, Ebin Bastola, Khagendra Bhandari, Randy J Ellingson, Stefaan De Wolf
  • Absorption
  • Defects
  • External quantum efficiency
  • Solar cells
  • Thickness
Single-Source Pulsed Laser Deposited Perovskite Solar Cells with >19% Efficiency
Article Year: 2023 DOI:https://doi.org/10.21203/rs.3.rs-3671187/v1
Authors: Tatiana Soto-Montero, Suzana Kralj, Randi Azmi, Manuel A. Reus, Junia S. Solomon, Daniel M. Cunha, Wiria Soltanpoor, Drajad Utomo, Esma Ugur, Badri Vishal, Martin Ledinsky, Peter Müller-Buschbaum, Finn Babbe, Do Kyoung Lee, Carolin M. Sutter-Fella, Erkan Aydin, Stefaan De Wolf, Monica Morales-Masis
  • Single-source
  • pulsed laser deposition
  • Metal halide perovskites
  • passivation
  • perovskite solar cells
  • Vapor deposition
Suppressed phase segregation for triple-junction perovskite solar cells
Article Year: 2023 DOI:https://doi.org/10.1038/s41586-023-06006-7
Authors: Zaiwei Wang, Lewei Zeng, Tong Zhu, Hao Chen, Bin Chen, Dominik J. Kubicki, Adam Balvanz, Chongwen Li, Aidan Maxwell, Esma Ugur, Roberto dos Reis, Matthew Cheng, Guang Yang, Biwas Subedi, Deying Luo, Juantao Hu, Junke Wang, Sam Teale, Suhas Mahesh, Sasa Wang, Shuangyan HU, Euidae Jung, Mingyang Wei, So Min Park, Luke Grater, Erkan Aydin, Zhaoning Song, Nikolas J. Podraza, Zheng-Hong Lu, Jinsong Huang, Vinayak P. Dravid, Stefaan De Wolf, Yanfa Yan, Michael Grätzel, Mercouri Kanatzidis, Edward Sargent
  • Electronic devices
  • Solar cells
Temperature Coefficients of Perovskite/Silicon Tandem Solar Cells
Year: 2023 DOI:https://doi.org/10.1021/acsenergylett.3c00930
Authors: Maxime Babics, Helen Bristow, Anil Reddy Pininti, Thomas G. Allen, Stefaan De Wolf
  • Electrical conductivity
  • Electrical properties
  • Photovoltaics
  • silicon
  • Solar cells
Controlled Growth of the Inorganic Backbone in Low-Dimensional Perovskites for Efficient, Stable, Semi-Transparent Wide Bandgap Perovskite Solar Cells
Article Year: 2023 DOI:https://doi.org/10.21203/rs.3.rs-2985134/v1
Authors: Andrea Zanetta, Badri Vishal, Fabiola Faini, Giovanni Pica, Sergio Marras, Bumin Yildirim, Maxime Babics, Esma Ugur, Erkan Aydin, Stefaan De Wolf, Michele De Bastiani, Giulia Grancini
Fully Sprayed Metal Oxide Transistors Utilizing Ti3C2Tx MXene Contacts
Article Year: 2023 DOI:https://doi.org/10.1021/acsaelm.2c01286
Authors: Emre Yarali, Jehad K. El-Demellawi, Hendrik Faber, Dipti R. Naphade, Yuanbao Lin, Kalaivanan Loganathan, Wejdan S. Alghamdi, Xiangming Xu, Atteq ur Rehman, Erkan Aydin, Despoina Gkeka, Linqu Luo, Emre Yengel, Temur Maksudov, Stefaan De Wolf, Husam N. Alshareef, Thomas D. Anthopoulos
  • Solution-processed electrodes
  • Metal oxide transistors
  • Large-area electronics
Front-contact passivation through 2D/3D perovskite heterojunctions enables efficient bifacial perovskite/silicon tandem solar cells
Article Year: 2023 DOI:https://doi.org/10.1016/j.matt.2023.05.028
Authors: Esma Ugur, Erkan Aydin, Michele De Bastiani, George T. Harrison, Bumin K.  Yildirim, Sam Teale, Bin Chen, Jiang Liu, Mingcong Wang, Akmaral Seitkhan, Maxime Babics, Anand S. Subbiah, Ahmed Ali Said, Randi Azmi, Atteq ur Rehman, Thomas G Allen, Philip Schulz, Edward H. Sargent, Frédéric Laquai, Stefaan De Wolf
  • bifacial tandem solar cells
  • Perovskite/silicon tandem solar cells
  • 2D/3D perovskite heterojunction
Photovoltaics at multi-terawatt scale: Waiting is not an option
Article Year: 2023 DOI:DOI: 10.1126/science.adf6957
Authors: Nancy M. Haegel, Pierre Verlinden, Marta Victoria, Pietro Altermatt, Harry Atwater, Teresa Barnes, Christian Breyer, Chris Case, Stefaan De Wolf, Chris Deline, Marwan Dharmrin, Bernhard Dimmler, Markus Gloeckler, Jan Christoph Goldschmidt, Brett Hallam, Sophia Haussener, Burkhard Holder, Ulrich Jaeger, Arnulf Jaeger-Waldau, Izumi Kaizuka, Hiroshi Kikusato, Benjamin Kroposki, Sarah Kurtz, Koji Matsubara, Stefan Nowak, Kazuhiko Ogimoto, Christian Peter, Ian Marius Peters, Simon Philipps, Michael Powalla, Uwe Rau, Thomas Reindl, Maria Roumpani, Keiichiro Sakurai, Peter Schossig, Rutger Schlatmann, Ron Sinton, Abdelilah Slaqui, Brittany L. Smith, Peter Schneidewind, BJ Stanbery, Marko Topic, William Tumas, Juzer Vasi, Matthias Vetter, Eicke Weber, A. W. Weeber, Anke Weidlich, Dirk Weiss, Andreas W. Bett
Industrial-scale deposition of nanocrystalline silicon oxide for 26.4%-efficient silicon heterojunction solar cells with copper electrodes
Article Year: 2023 DOI:https://doi.org/10.1038/s41560-023-01388-4
Authors: Cao Yu, Kun Gao, Chen-Wei Peng, Chenran He, Shibo Wang, Wei Shi, Vince Allen, Jiteng Zhang, Dengzhi Wang, Gangyu Tian, Yifan Zhang, Wenzhu Jia, Yuanhong Song, Youzhong Hu, Jack Colwell, Chunfang Xing, Qing Ma, Huiting Wu, Liangyuan Guo, Gangqiang Dong, Hao Jiang, Haihong Wu, Xinyu Wang, Dacheng Xu, Kun Li, Jun Peng, Wenzhu Liu, Daniel Chen, Alison Lennon, Xinmin Cao, Stefaan De Wolf, Jian Zhou, Xinbo Yang, Xiaohong Zhang
  • Materials of energy  and catalysis
  • Solar cells
Moisture-Resilient Perovskite Solar Cells for Enhanced Stability
Review Year: 2023 DOI:https://doi.org/10.1002/adma.202211317
Authors: Randi Azmi, Shynggys Zhumagali, Helen Bristow, Shanshan Zhang, Aren Yazmaciyan, Anil Reddy Pininti, Drajad Satrio Utomo, Anand S. Subbiah, Stefaan De Wolf
  • charge-transport layer
  • damp-heat testing
  • encapsulation
  • hygroscopic
  • moisture
  • Perovskite
  • stability
Design Criteria for Silicon Solar Cells with Fill Factors Approaching the Auger Limit
Letter Year: 2023 DOI:https://doi.org/10.1021/acsenergylett.3c01519
Authors: Arsalan Razzaq, Thomas G. Allen, Stefaan De Wolf
  • Auger recombination
  • Fill factor
  • recombination
  • Solar cells
  • Thickness
Bandgap Optimization for Bifacial Tandem Solar Cells
Letter Year: 2023 DOI:https://doi.org/10.1021/acsenergylett.3c01014
Authors: Lujia Xu, Fuzong Xu, Jiang Liu, Xuechun Zhang, Anand Selvin Subbiah, Stefaan De Wolf
  • Electrical conductivity
  • Optimization
  • Power conversion efficiency
  • silicon
  • Solar cells
Impact of TCO Microstructure on the Electronic Properties of Hole Transport Self-Assembled Monolayers
Article Year: 2023 DOI:https://doi.org/10.48550/arXiv.2309.03573
Authors: Suzana Kralj, Pia Dally, Pantelis Bampoulis, Badri Vishal, Stefaan De Wolf, Monica Morales-Masis
  • Condensed Matter-Materials Science
  • Physics-Applied Physics
Efficient Silicon Solar Cells through Organic Self-Assembled Monolayers as Electron Selective Contacts
Article Year: 2023 DOI:https://doi.org/10.1002/aenm.202303705
Authors: Adi Prasetio, Rakesh R. Pradhan, Pia Dally, Mohammed Ghadiyali, Randi Azmi, Udo Schwingenschlögl, Thomas G. Allen, Stefaan De Wolf
  • Crystalline silicon solar cells
  • electron-selective contact
  • organic materials
  • Self-assembled monolayers
  • solution-processed
Tandems have the power
Perspective Year: 2023 DOI:https://doi.org/10.1126/science.adi6278
Authors: Erkan Aydin, Stefaan De Wolf
Elucidating the Role of Contact-Induced Gap States and Passivation Molecules at Perovskite/Metal Contacts
Letter Year: 2023 DOI:https://doi.org/10.1021/acsaem.3c00292
Authors: Rakesh R. Pradhan, Mathan K. Eswaran, Anand S. Subbiah, Aslihan Babayigit, Stefaan De Wolf, Udo Schwingenschlögl
  • Solar cells
  • Perovskite
  • nonradiative recombination
  • in-gap states
  • surface passivation
Rationale for highly efficient and outdoor-stable terpolymer solar cells
Article Year: 2023 DOI:https://doi.org/10.1039/D3EE00350G
Authors: Hua Tang, Zhihui Liao, Safakath Karuthedath, Si Chen, Heng Liu, Jafar I.Khan, Maxime Babics, Wenchao Yang, Maryam Alqurashi, Yakun He, Julien Gorenflot, Jiaming  Huang, Gang Li, Stefaan De Wolf, Xinhui Lu, Christoph J. Brabec, Frédéric Laquai, Shirong  Lu
Parasitic Heating of Perovskite- and Silicon-Based Photovoltaics
Research Article Year: 2023 DOI:https://doi.org/10.1002/aenm.202300013
Authors: Lujia Xu, Erkan Aydin, Michele De Bastiani, Maxime Babics, Jiang Liu, Randi Azmi, Mohammed Alamer, Michael F. Salvador, Whenzu Liu, Thomas Allen, Fuzong Xu, Jingxuan Kang, Anand Subbiah, wenbo Yan, Atteq ur Rehman, Lyu Zhou, Waseem Raja, Qiaoqiang Gan, Zhengxin Liu, Stefaan De Wolf
  • Cooling score
  • Parasitic heating
  • Perovskites
  • silicon
  • Tandem
Bifacial perovskite/silicon tandem solar cells
Perspective Year: 2022 DOI:https://doi.org/10.1016/j.joule.2022.05.014
Authors: Michele De Bastiani, Anand S. Subbiah, Maxime Babics, Esma Ugur, Lujia Xu, Jiang Liu, Thomas G. Allen, Erkan Aydin, Stefaan De Wolf

Michele De Bastiani and colleagues address the main challenges of bifacial perovskite/silicon tandem solar cells in their last perspective published in Joule. Bifacial tandems are a great innovation to combine stability and performance at once, bringing the perovskite technology one step closer to its commercialization.

  • Perovskite/silicon tandem solar cells
  • bifacial solar cells
  • high-efficiency tandems
  • bifacial tandem solar cells
  • stable perovskite solar cells
Damp heat–stable perovskite solar cells with tailored-dimensionality 2D/3D heterojunctions
Report Year: 2022 DOI:DOI: 10.1126/science.abm5784
Authors: Randi Azmi, Esma Ugur, Akmaral Seitkhan, Faisal Aljamaan, Anand S. Subbiah, Jiang Liu, George T. Harrison, Mohamad Insan Nugraha, Mathan K. Eswaran, Maxime Babics, Yuan Chen, Fuzong Xu, Thomas G. Allen, Atteq ur Rehman, Chien-Lung Wang, Thomas D. Anthopoulos, Udo Schwingenschlögl, Michele De Bastiani, Erkan Aydin, Stefaan De Wolf

This work, which came out in Science, demonstrates the first perovskite solar cells with 96% PCE retention after damp heat test, with PCEs 20%.

  • perovskite solar cells
  • damp-heat test
  • stability
  • 2D passivation
Organic Hole Transport Layers for Efficient, Stable and Scalable Inverted Perovskite Solar Cells
Rewiew Year: 2022 DOI:https://doi.org/10.1002/adma.202203794
Authors: Yiguo Yao, Caidong Cheng, Chenyang Zhang, Hanlin Hu, Kai Wang, Stefaan De Wolf
  • Inverted perovskite solar cells
  • Organic hole transporting layers
  • Polymer
  • Self-assembled monolayers
  • Small molecules
Potential-induced degradation in perovskite/silicon tandem photovoltaic modules
Article Year: 2022 DOI:https://doi.org/10.1016/j.xcrp.2022.101026
Authors: Lujia Xu, Jiang Liu, Wei Luo, Nimer  Wehbe, Akmaral Seitkhan, Maxime Babics, Jingxuan Kang, Michele De Bastiani, Erkan Aydin, Thomas G. Allen, Mohammed Alamer, wenbo Yan, Fuzong Xu, Atteq ur Rehman, Stefaan De Wolf
  • Potential induced degradation
  • photovoltaic
  • Perovskite/silicon tandem
  • perovskite/silicon tandem module
  • Perovskite
  • silicon
  • Tandem
  • Degradation
Temperature-Dependent Optical Modeling of Perovskite Solar Cells
Article Year: 2022 DOI:https://doi.org/10.1021/acs.jpcc.2c04768
Authors: Waseem Raja, Thomas G. Allen, Ahmed Ali Said, Ohoud Alharbi, Erkan Aydin, Michele De Bastiani, Stefaan De Wolf
  • Electrical conductivity
  • Ellipsometry
  • Optical properties
  • Perovskites
  • Solar cells
Metal-Free Interconnecting Layer for Monolithic Perovskite/Organic Tandem Solar Cells with Enhanced Outdoor Stability
Article Year: 2022 DOI:https://doi.org/10.1021/acsaem.2c01749
Authors: Han Xu, Luis Torres Merino, Mehmet Koc, Erkan Aydin, Shynggys Zhumagali, Md Azimul Haque, Aren Yazmaciyan, Anirudh Sharma, Diego Rosas Villalva, Luis Huerta Hernandez, Michele De Bastiani, Maxime Babics, Furkan H. Isikgor, Joel Troughton, Stefaan De Wolf, Selcuk Yerci, Derya Baran
  • Conjugated polymers
  • Deposition
  • Layers
  • Perovskites
  • Solar cells
Regulating surface potential maximizes voltage in all-perovskite tandems
Article Year: 2022 DOI:https://doi.org/10.1038/s41586-022-05541-z
Authors: Hao Chen, Aidan Maxwell, Chongwen Li, Sam Teale, Bin Chen, Tong Zhu, Esma Ugur, George Harrison, Luke Grater, Junke Wang, Zaiwei Wang, Lewei Zeng, So Min Park, Lei Chen, Peter Serles, Rasha Abbas Awni, Biwas Subedi, Xiaopeng Zheng, Chuanxiao Xiao, Nikolas J. Podraza, Tobin Filleter, Cheng Liu, Yi Yang, Joseph M. Luther, Stefaan De Wolf, Mercouri G. Kanatzidis, Yanfa Yan, Edward H. Sargent
  • Electronic properties and materials
  • Photonic devices
  • Solar cells
Light-induced activation of boron doping in hydrogenated amorphous silicon for over 25% efficiency silicon solar cells
Article Year: 2022 DOI:https://doi.org/10.1038/s41560-022-01018-5
Authors: Wenzhu Liu, Jianhua Shi, Liping Zhang, Anjun Han, Shenglei Huang, Xiaodong Li, Jun Peng, Yuhao Yang, Yajun Gao, Jian Yu, Kai Jiang, Xinbo Yang, Zhenfei Li, Wenjie Zhao, Junlin Du, Xi Song, Jun Yin, Jie Wang, Youlin Yu, Qiang Shi, Zhixin Ma, Haichuan Zhang, Jiajia Ling, Lujia Xu, Jingxuan Kang, Fuzong Xu, Jiang Liu, Hanyuan Liu, Yi Xie, Fanying Meng, Stefaan De Wolf, Frédéric Laquai, Zengfeng Di, Zhengxin Liu
  • Devices for energy harvesting
  • Solar cells
Photo-induced enhancement of lattice fluctuations in metal-halide perovskites
Article Year: 2022 DOI:https://doi.org/10.1038/s41467-022-28532-0
Authors: Mingcong Wang, Yajun Gao, Kai Wang, Jiang Liu, Stefaan De Wolf, Frédéric Laquai
Mechanical Reliability of Fullerene/Tin Oxide Interfaces in Monolithic Perovskite/Silicon Tandem Cells
Letter Year: 2022 DOI:https://doi.org/10.1021/acsenergylett.1c02148
Authors: Michele De Bastiani, Giovanni Armaroli, Rawan Jalmood, Laura Ferlauto, Xiaole Li, Ran Tao, George T. Harrison, Mathan K. Eswaran, Randi Azmi, Maxime Babics, Anand S. Subbiah, Erkan Aydin, Thomas G. Allen, Craig Combe, Tobias Cramer, Derya Baran, Udo Schwingenschlögl, Gilles Lubineau, Daniela Cavalcoli, Stefaan De Wolf
Monolithic Perovskite/Silicon Tandem Photovoltaics with Minimized Cell-to-Module Losses by Refractive-Index Engineering
Article Year: 2022 DOI:https://doi.org/10.1021/acsenergylett.2c01142
Authors: Lujia Xu, Jiang Liu, Francesco Toniolo, Michele De Bastiani, Maxime Babics, wenbo Yan, Fuzong Xu, Jingxuan Kang, Thomas Allen, Arsalan Razzaq, Erkan Aydin, Stefaan De Wolf
  • Absorption
  • Amorphous materials
  • Optimization
  • Power conversion efficiency
  • Solar cells
18.9% Efficient Organic Solar Cells Based on n-Doped Bulk-Heterojunction and Halogen-Substituted Self-Assembled Monolayers as Hole Extracting Interlayers
Research Article Year: 2022 DOI:https://doi.org/10.1002/aenm.202202503
Authors: Yuanbao Lin, Yadong Zhang, Junxiang Zhang, Mantas Marcinskas, Tadas Malinauskas, Artiom Magomedov, Mohamad Insan Nugraha, Dimitris Kaltsas, Dipti R. Naphade, George T. Harrison, Abdulrahman El-Labban, Stephen Barlow, Stefaan De Wolf, Ergang Wang, Iain McCulloch, Leonidas Tsetseris, Vytautas Getautis, Seth R. Marder, Thomas D. Anthopoulos
  • Molecular dopants
  • Organic bulk-heterojunctions
  • Organic semiconductors
  • organic solar cells
  • Self-assembled monolayers
  • Solution processing
Generation of long-lived charges in organic semiconductor heterojunction nanoparticles for efficient photocatalytic hydrogen evolution
Article Year: 2022 DOI:https://doi.org/10.1038/s41560-022-00990-2
Authors: Jan Kosco, Soranyel Gonzalez- Carrero, Calvyn T. Howells, Teng Fei, Yifang Dong, Rachid Sougrat, George T. Harrison, Yuliar Firdaus, Rajendar Sheelamanthula, Balaji Purushothaman, Floriana Moruzzi, Weidong Xu, Lingyun Zhao, Aniruddha Basu, Stefaan De Wolf, Thomas D. Anthopoulos, James R.Durrant, Iain McCulloch
Quantitative Analysis of Nanorough Hydrogenated Si(111) Surfaces through Vibrational Spectral Assignment by Periodic DFT Calculations
Article Year: 2022 DOI:https://doi.org/10.1021/acs.jpcc.1c09766
Authors: Jakub Holovsky, Jakub Sebera, Vladimir Sychrovsky, Jan Zemen, Stefaan De Wolf, Christophe Ballif
  • Molecular structure
  • Quantum mechanics
  • Etching  Silicon
  • Oscillation
Photoactivated p-Doping of Organic Interlayer Enables Efficient Perovskite/Silicon Tandem Solar Cells
Letter Year: 2022 DOI:https://doi.org/10.1021/acsenergylett.2c00780
Authors: Xiaopeng Zheng, Jiang Liu, Tuo Liu, Erkan Aydin, Min Chen, wenbo Yan, Michele De Bastiani, Thomas G. Allen, Shuai Yuan, Ahmad R. Kirmani, Kyle N. Baustert, Michael F. Salvador, Bekir Turedi, Adbullah Y. Alsalloum, Khulud Almasabi, Konstantinos Kotsovos, Issam Gereige, Liang-Sheng Liao, Joseph M. Luther, Kenneth R. Graham, Omar F. Mohammed, Stefaan De Wolf, Osman M. Bakr

This work, which took place in ACS Energy Letters, reports the photoactivated p-doping of PTAA (widely used hole transport layer) to enhance hole extraction for (textured) perovskite/silicon tandem solar cells, making the device performance less sensitive to the variation of hole transport layer thickness.

  • doping
  • light
  • Power conversion efficiency
  • silicon
  • Solar cells
Scaled Deposition of Ti3C2Tx MXene on Complex Surfaces: Application Assessment as Rear Electrodes for Silicon Heterojunction Solar Cells
Article Year: 2022 DOI:https://doi.org/10.1021/acsnano.1c08871
Authors: Erkan Aydin, Jehad K. El-Demellawi, Emre Yarali, Faisal Aljamaan, Simone Sansoni, Atteq ur Rehman, George T. Harrison, Jingxuan Kang, Abdulrahman El-Labban, Michele De Bastiani, Arsalan Razzaq, Emmanuel Van Kerschaver, Thomas G. Allen, Omar F. Mohammed, Thomas D. Anthopoulos, Husam N. Alshareef, Stefaan De Wolf

This work, which took place in ACS Nano, introduces the scalability potential of the highly conductive MXene films and assesses their applicability as rear electrodes for silicon heterojunction solar cells.

  • Uniform coatings
  • Textured surfaces
  • Cost-effective electrodes
  • Large-area devices
  • Industrial-size MXene
Monolithic Perovskite/Silicon Tandems with >28% Efficiency: Role of Silicon-Surface Texture on Perovskite Properties
Research Article Year: 2022 DOI:https://doi.org/10.1002/adfm.202205557
Authors: Michele De Bastiani, Rawan Jalmood, Jiang Liu, Christina Ossig, Ales Vlk, Karol Vegso, Maxime Babics, Furkan H. Isikgor, Anand S. Selvin, Randi Azmi, Esma Ugur, Swarnendu Banerjee, Alessandro J. Mirabelli, Erkan Aydin, Thomas G. Allen, Atteq ur Rehman, Emmanuel Van Kerschaver, Petter Siffalovic, Michael E. Stuckelberger, Martin Ledinsky, Stefaan De Wolf
  • Current matching
  • Perovskite photovoltaics
  • Perovskite/silicon tandem solar cells
  • Silicon heterojunction solar cells
  • Silicon texturing
Accurate Optical Modeling of Monolithic Perovskite/Silicon Tandem Solar Cells and Modules on Textured Silicon Substrates
Article Year: 2022 DOI:https://doi.org/10.1103/PRXEnergy.1.023005
Authors: Lujia Xu, Jiang Liu, Keith Mclntosh, Malcolm Abbott, Erkan Aydin, Thomas Allen, Michele De Bastiani, Maxime Babics, Jingxuan Kang, Mohammed Alamer, wenbo Yan, Wenzhu Liu, Fuzong Xu, Atteq ur Rehman, Stefaan De Wolf
Silicon heterojunction solar cells: Techno-economic assessment and opportunities
Perspective Year: 2022 DOI:https://doi.org/10.1016/j.joule.2022.02.009
Authors: Arsalan Razzaq, Thomas G. Allen, Wenzhu Liu, Zhengxin Liu, Stefaan De Wolf

Arsalan Razzaq and colleagues from KPV-Lab recently published their perspective in Joule, discussing the techno-economic barriers for the industrial adoption of silicon heterojunction technology. This work highlights critical areas that need to be addressed for enabling terawatt-scale silicon heterojunction deployment.

  • Silicon photovoltaics
  • passivating contacts
  • silicon heterojunction
Life on the Urbach Edge
Perspective Year: 2022 DOI:https://doi.org/10.1021/acs.jpclett.2c01812
Authors: Esma Ugur, Martin Ledinský, Thomas G. Allen, Jakub Holovsky, Ales Vlk, Stefaan De Wolf
  • Absorption
  • Materials
  • Perovskites
  • Photovoltaics
  • Semiconductors
Efficient and stable perovskite-silicon tandem solar cells through contact displacement by MgFx
Report Year: 2022 DOI:https://doi.org/10.1126/science.abn8910
Authors: Jiang Liu, Michele De Bastiani, Erkan Aydin, George T. Harrison, Yajun Gao, Rakesh R. Pradhan, Mathan K. Eswaran, Mukunda Mandal, wenbo Yan, Akmaral Seitkhan, Maxime Babics, Anand S. Subbiah, Esma Ugur, Fuzong Xu, Lujia Xu, Mingcong Wang, Atteq ur Rehman, Arsalan Razzaq, Jingxuan Kang, Randi Azmi, Ahmed Ali Said, Furkan H. Isikgor, Thomas G. Allen, Denis Andrienko, Udo Schwingenschlögl, Frédéric Laquai, Stefaan De Wolf
Unleashing the Full Power of Perovskite/Silicon Tandem Modules with Solar Trackers
Letter Year: 2022 DOI:https://doi.org/10.1021/acsenergylett.2c00442
Authors: Maxime Babics, Michele De Bastiani, Ahmed Hesham Balawi, Esma Ugur, Erkan Aydin, Anand S. Subbiah, Jiang Liu, Lujia Xu, Randi Azmi, Thomas G. Allen, Atteq ur Rehman, Thomas Altmann, Michael F. Salvador, Stefaan De Wolf
  • Solar cells
  • Photovoltaics
  • Perovskites
  • Energy
  • Solar energy
High-performing organic electronics using terpene green solvents from renewable feedstocks
Article Year: 2022 DOI:https://doi.org/10.1038/s41560-022-01167-7
Authors: Daniel Corzo, Diego Rosas Villalva, Amruth C, Guillermo Tostado-Blázquez, Emily Bezerra Alexandre, Luis Huerta Hernandez, Jianhua Han, Han Xu, Maxime Babics, Stefaan De Wolf, Derya Baran
  • Electronic devices
  • Solar cells
Probing Ultrafast Interfacial Carrier Dynamics in Metal Halide Perovskite Films and Devices by Transient Reflection Spectroscopy
Forum article Year: 2022 DOI:https://doi.org/10.1021/acsami.2c03016
Authors: Yajun Gao, Jiang Liu, Furkan H. Isikgor, Mingcong Wang, Jafar I.Khan, Stefaan De Wolf, Frédéric Laquai
  • carrier dynamics
  • interfaces
  • Perovskites
  • recombination
  • thin films
Cl2-Doped CuSCN Hole Transport Layer for Organic and Perovskite Solar Cells with Improved Stability
Letter Year: 2022 DOI:https://doi.org/10.1021/acsenergylett.2c01545
Authors: Jian-Wei Liang, Yuliar Firdaus, Randi Azmi, Hendrik Faber, Dimitrios Kaltsas, Chun Hong Kang, Mohamad Insan Nugraha, Emre Yengel, Tien Khee Ng, Stefaan De Wolf, Leonidas Tsetseris, Boon S. Ooi, Thomas D. Anthopoulos
  • Chlorine
  • Conjugated polymers
  • Layers
  • Solar cells
  • thin films
Molecular engineering of contact interfaces for high-performance perovskite solar cells
Rewiew Year: 2022 DOI:https://doi.org/10.1038/s41578-022-00503-3
Authors: Furkan H. Isikgor, Shynggys Zhumagali, Luis V. T. Merino, Michele De Bastiani, Iain McCulloch, Stefaan De Wolf
  • Electronic devices
  • Solar cells
  • Solar energy
Photon recycling in perovskite solar cells and its impact on device design
Review Year: 2021 DOI:https://doi.org/10.1515/nanoph-2021-0067
Authors: Waseem Raja, Michele De Bastiani, Thomas G Allen, Erkan Aydin, Arsalan Razzaq, Atteq ur Rehman, Esma Ugur, Aslihan Babayigit, Anand S. Subbiah, Furkan H. Isikgor, Stefaan De Wolf

The review which is published in Nanophotonics focuses on light-trapping schemes for efficient photon recycling in perovskite solar cells (PSCs).

  • Light-trapping
  • Perovskites
  • photon recycling
  • Photovoltaics
  • Solar cells
All Set for Efficient and Reliable Perovskite/Silicon Tandem Photovoltaic Modules?
Perspective Year: 2021 DOI:https://doi.org/10.1002/solr.202100493
Authors: Michele De Bastiani, Maxime Babics, Erkan Aydin, Anand S. Subbiah, Lujia Xu, Stefaan De Wolf
  • Modules
  • Perovskites
  • Reliability
  • silicon
  • Tandems
Potassium Thiocyanate‐Assisted Enhancement of Slot‐Die‐Coated Perovskite Films for High‐Performance Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1002/smsc.202000044
Authors: Fuzong Xu, Jiang Liu, Anand S. Subbiah, Whenzu Liu, Jingxuan Kang, George T. Harrison, Xinbo Yang, Furkan H. Isikgor, Erkan Aydin, Michele De Bastiani, Stefaan De Wolf
The MAPbI3 polycrystalline films with 25.15um charge carrier diffusion length and grain size of 11 um are achieved by slot-die method assisted by KSCN. Based on the films, the planar solar cells with all layers being deposited by scalable methods achieve an efficiency of 21.38%.
  • hysteresis of perovskite solar cells
  • perovskite grains
  • potassium thiocyanate additive
  • slot-die coating
Efficient Hybrid Amorphous Silicon/Organic Tandem Solar Cells Enabled by Near-Infrared Absorbing Nonfullerene Acceptors
Research Article Year: 2021 DOI:https://doi.org/10.1002/aenm.202100166
Authors: Joel Troughton, Sebastian Neubert, Nicola Gasparini, Diego Rosas Villalva, Jules Bertrandie, Akmaral Seitkhan, Sri Harish Kumar Paleti, Anirudh Sharma, Michele De Bastiani, Erkan Aydin, Thomas D. Anthopoulos, Stefaan De Wolf, Rutger Schlatmann, Derya Baran
  • Tandem
  • Organic
  • Amorphous sillicon
  • Photovoltaics
  • Nonfullerene
Concurrent cationic and anionic perovskite defect passivation enables 27.4% perovskite/silicon tandems with suppression of halide segregation
Article Year: 2021 DOI:https://doi.org/10.1016/j.joule.2021.05.013
Authors: Furkan H. Isikgor, Francesco Furlan, Jiang Liu, Esma Ugur, Mathan K. Eswaran, Anand S. Subbiah, Emre Yengel, Michele De Bastiani, George T. Harrison, Shynggys Zhumagali, Calvyn T. Howells, Erkan Aydin, Mingcong Wang, Nicola Gasparini, Thomas G. Allen, Atteq ur Rehman, Emmanuel Van Kerschaver, Derya Baran, Iain McCulloch, Thomas D. Anthopoulos, Udo Schwingenschlögl, Frédéric Laquai, Stefaan De Wolf

This study, which was recently published in Joule, reports a concurrent cationic and anionic perovskite defect passivation strategy using the phenformin hydrochloride molecule boosting the performance of monolithic perovskite/silicon tandem solar cells.

  • Perovskite
  • Solar cells
  • Tandems
  • passivation
  • silicon
  • Photovoltaics
  • phase segregation
  • Wide band-gap
  • Defects
Impact of Photoluminescence Reabsorption in Metal‐Halide Perovskite Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1002/solr.202100029
Authors: Mingcong Wang, Kai Wang, Yajun Gao, Jafar I.Khan, Wenchao Yang, Stefaan De Wolf, Frédéric Laquai

An analytical solution of photoluminescence reabsorption (PLr) is used to determine the intrinsic radiative carrier recombination rate of metal-halide perovskite films. Simulation of its impact on the quasi-Fermi-level splitting (QFSL) reveals it is detrimental at high but advantageous at low nonradiative recombination rates. Importantly, neglecting PLr results in overestimation of the effective nonradiative recombination rate in perovskite solar cells.

  • nonradiative recombination
  • passivation strategies
  • perovskite solar cells
  • photon recycling
  • quantum efficiency
  • transient spectroscopy
Efficient bifacial monolithic perovskite/silicon tandem solar cells via bandgap engineering
Article Year: 2021 DOI:https://doi.org/10.1038/s41560-020-00756-8
Authors: Michele De Bastiani, Alessandro J. Mirabelli, Yi Hou, Fabrizio Gota, Erkan Aydin, Thomas G Allen, Joel Troughton, Anand S. Subbiah, Furkan H. Isikgor, Jiang Liu, Lujia Xu, Bin Chen, Emmanuel Van Kerschaver, Derya Baran, Beatrice Fraboni, Michael F. Salvador, Ulrich W. Paetzold, Edward H. Sargent, Stefaan De Wolf

In this publication, which took place in Nature Energy, we investigate the influence of scattered and reflected light from the ground (albedo) on the performance of the bifacial tandems with different perovskite bandgaps.

  • Materials for energy and catalysis
  • Solar cells
28.2%-efficient, outdoor-stable perovskite/silicon tandem solar cell
Article Year: 2021 DOI:https://doi.org/10.1016/j.joule.2021.11.003
Authors: Jiang Liu, Erkan Aydin, Jun Yin, Michele De Bastiani, Furkan H. Isikgor, Atteq ur Rehman, Emre Yengel, Esma Ugur, George T. Harrison, Mingcong Wang, Yajun Gao, Jafar Iqbal Khan, Maxime Babics, Thomas G. Allen, Anand S. Subbiah, Kaichen Zhu, Xiaopeng Zheng, wenbo Yan, Fuzong Xu, Michael F. Salvador, Osman M. Bakr, Thomas D. Anthopoulos, Mario Lanza, Omar F. Mohammed, Frédéric Laquai, Stefaan De Wolf
This study, which took place in Joule, demonstrates a simple additive strategy to suppress halide segregation. Here, we demonstrate 28.2%-efficient and stable perovskite/Si monolithic tandem solar cells
  • Perovskite/silicon
  • passivation
  • Phase stability
  • Outdoor
Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer
Research Article Year: 2021 DOI:https://doi.org/10.1002/aenm.202100839
Authors: Jafar I.Khan, Maha A. Alamoudi, Neha Chaturvedi, Raja S. Ashraf, Mohammed N. Nabi, Anastasia Markina, Wenlan Liu, Top Archie Dela Peña, Weimin Zhang, Olivier Alévêque, George T. Harrison, Wejdan Alsufyani, Eric Levillain, Stefaan De Wolf, Denis Andrienko, Iain McCulloch, Frédéric Laquai
  • Charge generation
  • Non-fullerene acceptors
  • Organic photovoltaics
  • Quadrupole moment
  • ultrafast spectroscopy
Scalable Pulsed Laser Deposition of Transparent Rear Electrode for Perovskite Solar Cells
Full Paper Year: 2021 DOI:https://doi.org/10.1002/admt.202000856
Authors: Yury Smirnov, Laura Schmengler, Riemer Kuik, Pierre-Alexis Repecaud, Mehrdad Najafi, Dong Zhang, Mirjam Theelen, Erkan Aydin, Sjoerd Veenstra, Stefaan De Wolf, Monica Morales-Masis
This study, which takes place in Advanced Materials Technologies, demonstrates PLD‐grown IZRO transparent electrode on semi‐transparent perovskite solar cells.
  • magnetron sputtering
  • perovskite solar cells
  • pulsed laser deposition
  • transparent conducting oxides
Life Cycle Assessment of Coated-Glass Recovery from Perovskite Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1021/acssuschemeng.1c05029
Authors: Gonzalo Rodriguez-Garcia, Erkan Aydin, Stefaan De Wolf, Brett Carlson, Jon Kellar, Ilke Celik
This work was performed in collaboration with Ilke Celik from the South Dakota School of Mines and Technology.
  • Layers
  • Solvents
  • Amorphous materials
  • Recycling
  • Materials
Sputtered transparent electrodes for optoelectronic devices: Induced damage and mitigation strategies
Rewiew Year: 2021 DOI:https://doi.org/10.1016/j.matt.2021.09.021
Authors: Erkan Aydin, Cesur Altinkaya, Yury Smirnov, Muhammad A. Yaqin, Kassio P.S Zanoni, Abhyuday Paliwal, Yuliar Firdaus, Thomas G. Allen, Thomas D. Anthopoulos, Henk J. Bolink, Monica Morales-Masis, Stefaan De Wolf
  • sputtering
  • Bufer layers
  • Optoelectronic devices
  • Perovskite
  • Organic
  • silicon
  • Chalcopyrite
  • Chalcogenide
  • tandem solar cells
  • light-emitting  diodes
Heat generation and mitigation in silicon solar cells and modules
Article Year: 2021 DOI:https://doi.org/10.1016/j.joule.2021.01.012
Authors: Lujia Xu, Whenzu Liu, Haohui Liu, Cangming Ke, Mingcong Wang, Chenlin Zhang, Erkan Aydin, Mohammed Al-Aswad, Konstantinos Kotsovos, Issam Gereige, Ahmed Al-Saggaf, Aqil Jamal, Xinbo Yang, Peng Wang, Frédéric Laquai, Thomas G. Allen, Stefaan De Wolf

This study, which came out in Joule, reveals that once the PCE approaches a practical upper limit, work on the control and mitigation of the module temperature can be equally or even more significant than costly marginal gains in PCE.

  • Temperature-dependent levelized cost of energy (LCOE)
  • Heating
  • photovoltaic
  • Module temperature
  • Equivalent ratio
  • Opto-electronically coupled thermal model
Electrode metallization for scaled perovskite/silicon tandem solar cells: Challenges and opportunities
Special issue article Year: 2021 DOI:https://doi.org/10.1002/pip.3499
Authors: Atteq ur Rehman, Emmanuel Van Kerschaver, Erkan Aydin, Waseem Raja, Thomas G. Allen, Stefaan De Wolf

Our perspective on the Electrode Metallization for industrial scale Perovskite/Silicon Tandems is published now in Progress in Photovoltaics. The focus of the study reveals the challenges and opportunities of scaled metallization in terms of grid design to mitigate the power losses, adopting state-of-the-art screen-printed metallization as well as cost-effective alternate metallization routes and their viability for industrial applications.

  • Cost analysis
  • Metal contacts
  • Metallization
  • Photovoltaics
  • Screen-printing
  • Perovskite/silicon tandem
Charge Carrier Recombination at Perovskite/Hole Transport Layer Interfaces Monitored by Time-Resolved Spectroscopy
Letter Year: 2021 DOI:https://doi.org/10.1021/acsenergylett.1c01931
Authors: Jafar I.Khan, Furkan H. Isikgor, Esma Ugur, Waseem Raja, George T. Harrison, Emre Yengel, Thomas D. Anthopoulos, Stefaan De Wolf, Frédéric Laquai
  • Oxides
  • interfaces
  • Layers
  • recombination
  • Perovskites
Chemical Design Rules for Non-Fullerene Acceptors in Organic Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1002/aenm.202102363
Authors: Anastasia Markina, Kun-Han Lin, Wenlan Liu, Carl Poelking, Yuliar Firdaus, Diego Rosas Villalva, Jafar I.Khan, Sri H. K. Paleti, George T. Harrison, Julien Gorenflot, Weimin Zhang, Stefaan De Wolf, Iain McCulloch, Thomas D. Anthopoulos, Derya Baran, Frédéric Laquai, Denis Andrienko
  • design rules
  • donor-acceptor interface
  • Non-fullerene acceptors
  • organic solar cells
Toward Stable Monolithic Perovskite/Silicon Tandem Photovoltaics: A Six-Month Outdoor Performance Study in a Hot and Humid Climate
Letter Year: 2021 DOI:https://doi.org/10.1021/acsenergylett.1c01018
Authors: Michele De Bastiani, Emmanuel Van Kerschaver, Quentin Jeangros, Atteq ur Rehman, Erkan Aydin, Furkan H. Isikgor, Alessandro J. Mirabelli, Maxime Babics, Jiang Liu, Shynggys Zhumagali, Esma Ugur, George T. Harrison, Thomas G Allen, Bin Chen, Yi Hou, Semen Shikin, Edward H. Sargent, Christophe Ballif, Michael Salvador, Stefaan De Wolf

Perovskite solar cells are an emerging photovoltaic technology that is gathering huge attention in the solar community for its power conversion efficiency. Recently, the coupling between the perovskite and the silicon technologies in the tandem configuration boosted even further this power conversion efficiency, reaching record values for terrestrial applications. However, several degradation mechanisms in the perovskite are negatively affecting the stability of this technology, questioning if successful commercialization is possible. At KPVLAB we are pioneering the outdoor testing of perovskite/silicon tandem solar cells to investigate, understand, and improve their stability.

 

  • Degradation
  • Anions
  • Layers
  • Solar cells
  • Perovskites
Ligand-bridged charge extraction and enhanced quantum efficiency enable efficient n–i–p perovskite/silicon tandem solar cells
Article Year: 2021 DOI:https://doi.org/10.1039/D1EE01206A
Authors: Erkan Aydin, Jiang Liu, Esma Ugur, Randi Azmi, George T. Harrison, Yi Hou, Bin Chen, Shynggys Zhumagali, Michele De Bastiani, Mingcong Wang, Waseem Raja, Thomas G. Allen, Atteq ur Rehman, Anand S. Subbiah, Maxime Babics, Aslihan Babayigit, Furkan H. Isikgor, Kai Wang, Emmanuel Van Kerschaver, Leonidas Tsetseris, Edward H. Sargent, Frédéric Laquai, Stefaan De Wolf
This study demonstrates 27%-efficient perovskite/silicon tandem solar cells in n–i–p configuration by developing novel electron and hole selective contacts, which combine high broadband transparency with efficient charge extraction. This study took place in the June issue of Energy & Environmental Science.
  • Perovskite/silicon tandem solar cells
  • flipped polarity
  • n-i-p tandems
  • niobium oxide
  • vanadium oxide
  • spiro-TTB
  • textured interfaces
  • champion solar cells
  • C60-SAM
  • Two-dimensional passivation
  • enhanced stability
Linked Nickel Oxide/Perovskite Interface Passivation for High-Performance Textured Monolithic Tandem Solar Cell
Research Article Year: 2021 DOI:https://doi.org/10.1002/aenm.202101662
Authors: Shynggys Zhumagali, Furkan H. Isikgor, Partha Maity, Jun Yin, Esma Ugur, Michele De Bastiani, Anand S. Subbiah, Alessandro J. Mirabelli, Randi Azmi, George T. Harrison, Joel Troughton, Erkan Aydin, Jiang Liu, Thomas Allen, Atteq ur Rehman, Derya Baran, Omar F. Mohammed, Stefaan De Wolf
This study demonstrates double-side passivation of the nickel oxide/perovskite interface by incorporating N719 organometallic dye molecule, which enables 26.2% efficient textured monolithic p-i-n perovskite/silicon solar cells. This study was published in October's issue of Advanced Energy Materials.
  • nickel oxide
  • passivation
  • Perovskites
  • Solar cells
  • Tandems
Electron-Selective ‍Lithium Contacts for Crystalline Silicon Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1002/admi.202100015
Authors: Jingxuan Kang, Xinbo Yang, Wenzhu Liu, Jiang Liu, Hang Xu, Thomas Allen, Stefaan De Wolf

This study, which takes place Advanced Materials Interfaces reports metallic lithium contact, applied to crystalline silicon solar cell and proved to be an excellent electron-selective, hole-blocking transport layer with an efficiency of 19%.

  • Crystalline silicon solar cells
  • Electron-selective contact materials
  • Heterostructures
  • Lithium
  • Photovoltaics
3-D Modeling of Ultrathin Solar Cells with Nanostructured Dielectric Passivation: Case Study of Chalcogenide Solar Cells
Research Article Year: 2021 DOI:https://doi.org/10.1002/adts.202100191
Authors: Waseem Raja, Erkan Aydin, Thomas G. Allen, Stefaan De Wolf

Ultrathin solar cells can be a path forward to low-cost photovoltaics due to their reduced material consumption and shorter required deposition times. With excellent surface passivation, such devices may feature higher open-circuit voltages (VOC). However, their short-circuit current density (JSC) may be reduced due to decreased light absorption. This mandates implementation of efficient light-trapping structures. To design efficient ultrathin solar cells that combine surface-passivation and light-trapping features, accurate 3-D modeling is necessary. To this end, we have developed a novel 3-D opto-electrical finite-element model to analyze the performance of ultrathin solar cells. We apply our model to the case of ultrathin (< 500 nm) chalcogenide solar cells (copper indium gallium (di) selenide, CIGSe), rear-passivated with nanostructured Al2O3 to circumvent optical and electrical losses, resulting in an absolute PCE enhancement of 3.9%, compared to cells without passivation structure. 

  • 3-D optical electrical modeling
  • Light-trapping
  • nanostructured passivation
Tin Oxide Electron‐Selective Layers for Efficient, Stable, and Scalable Perovskite Solar Cells
Review Year: 2021 DOI:https://doi.org/10.1002/adma.202005504
Authors: Cesur Altinkaya, Erkan Aydin, Esma Ugur, Furkan H. Isikgor, Anand S. Subbiah, Michele De Bastiani, Jiang Liu, Aslihan Babayigit, Thomas G Allen, Frédéric Laquai, Abdullah Yildiz, Stefaan De Wolf

This review, which took place in Advanced Materials, provides a comprehensive overview of the tin-oxide electron-selective layered for champion perovskite solar cells.

  • Electron-selective layers
  • Low-temperature processing
  • perovskite solar cells
  • Tin oxide
Interplay between temperature and bandgap energies on the outdoor performance of perovskite/silicon tandem solar cells
Article Year: 2020 DOI:https://doi.org/10.1038/s41560-020-00687-4
Authors: Erkan Aydin, Thomas G. Allen, Michaele De Bastiani, Lujia Xu, Jorge Ávila, Michael Salvador, Emmanuel Van Kerschaver, Stefaan De Wolf
This study, which took place in Nature Energy, show that a lower bandgap perovskite than needed at standard test conditions is actually beneficial to perovskite/silicon tandem cells in the field.
  • perovskite silicon tandems
  • Field Performance
  • Outdoor test
  • High-efficiency devices
  • Hybrid tandems
  • Certified tandems
Acene Ring Size Optimization in Fused Lactam Polymers Enabling High n-Type Organic Thermoelectric Performance
Article Year: 2020 DOI:https://doi.org/10.1021/jacs.0c10365
Authors: Hu Chen, Maximilian Moser, Suhao Wang, Cameron Jellett, Karl Thorley, George T. Harrison, Xuechen Jiao, MIngfei Xiao, Balaji Purushothaman, Maryam Alsufyani, Helen Bristow, Stefaan De Wolf, Nicola Gasparini, Andrew Wadsworth, Christopher R. McNeill, Henning  Sirringhaus, Simone Fabiano, Iain McCulloch
  • Hydrocarbons
  • Aromatic compounds
  • Electrical conductivity
  • Conjugated polymers
  • Polymers
Impact of Cesium/Rubidium Incorporation on the Photophysics of Multiple‐Cation Lead Halide Perovskites
Full Paper Year: 2020 DOI:https://doi.org/10.1002/solr.202000072
Authors: Yajun Gao, Kai Wang, Mingcong Wang, Jafar I.Khan, Ahmed Balawi, Wenzhu Liu, Stefaan De Wolf, Frédéric Laquai
This work, published in Solar RRL,  presents a detailed study of the photophysics of multiple‐cation mixed halide lead perovskites and develops a concise picture of the impact of cesium/rubidium incorporation on the photophysics and device performance.
  • carrier cooling
  • carrier dynamics
  • halide perovskites
  • ultrafast spectroscopy
A Highly Conductive Titanium Oxynitride Electron‐Selective Contact for Efficient Photovoltaic Devices
Communication Year: 2020 DOI:https://doi.org/10.1002/adma.202002608
Authors: Xinbo Yang, Yuanbao Lin, Jiang Liu, Wenzhu Liu, Qunyu Bi, Xin Song, Jingxuan Kang, Fuzong Xu, Lujia Xu, Mohamed N. Hedhili, Derya Baran, Xiaohong Zhang, Thomas D. Anthopoulos, Stefaan De Wolf
  • electron‐selective contacts
  • organic solar cells
  • passivating contacts
  • silicon solar cell
  • titanium oxynitride
Eco‐Friendly Spray Deposition of Perovskite Films on Macroscale Textured Surfaces
Communication Year: 2020 DOI:https://doi.org/10.1002/admt.201901009
Authors: Simone Sansoni, Michaele De Bastiani, Erkan Aydin, Esma Ugur, Furkan Halis Isikgor, Areej Alzahrani, Francesco Lamberti, Frédéric Laquai, Moreno Meneghetti, Stefaan De Wolf
This study demonstrates the potential usage of the spray deposited perovskite nanocrystal inks for perovskite/silicon tandem solar cells.
  • eco‐friendly spray deposition
  • spray deposition
  • hybrid perovskites
  • textured interfaces
Lewis-Acid Doping of Triphenylamine-Based Hole Transport Materials Improves the Performance and Stability of Perovskite Solar Cells
Research Article Year: 2020 DOI:https://doi.org/10.1021/acsami.0c03660
Authors: Jiang Liu, Wenzhu Liu, Erkan Aydin, George T. Harrison, Furkan H. Isikgor, Xinbo Yang, Anand S. Subbiah, Stefaan De Wolf
This study, which came out in the recent issue of ACS Applied Materials & Interfaces, successfully demonstrates the Lewis-acid (TPFB) doping of the widely used spiro-OMeTAD hole transport materials for perovskite solar cells to. This dopant replaces the conventional LiTFSI/tBP doping. By doing so, the device stability is increased and processing is simplified.
  • Perovskite
  • triphenylamine
  • Lewis acids
  • doping
  • stability
Dynamics of antisolvent processed hybrid metal halide perovskites studied by in situ photoluminescence and its influence on optoelectronic properties
Article Year: 2020 DOI:https://doi.org/10.1021/acsaem.9b02052
Authors: Tze-Bin Song, Zhenghao Yuan, Finn Babbe, David P. Nenon, Erkan Aydin, Stefaan De Wolf, Carolin M. Sutter-Fella
In collaboration with Carolin M. Sutter-Fella from Lawrence Berkeley National Laboratory
  • halide perovskites
  • solution synthesis
  • antisolvent
  • in situ characterization
  • nucleation
  • recombination
How Humidity and Light Exposure Change the Photophysics of Metal Halide Perovskite Solar Cells
Full Paper Year: 2020 DOI:https://doi.org/10.1002/solr.202000382
Authors: Esma Ugur, Erkki Alarousu, Jafar I.Khan, Ales Vlk, Erkan Aydin, Michele De Bastiani, Ahmed H. Balawi, Sandra P. Gonzalez Lopez, Martin Ledinský, Stefaan De Wolf, Frédéric Laquai
  • Metal halide perovskites
  • Perovskite photophysics
  • perovskite solar cells
  • photodegradation
High-Performance Perovskite Single-Junction and Textured Perovskite/Silicon Tandem Solar Cells via Slot-Die Coating
Letter Year: 2020 DOI:https://doi.org/10.1021/acsenergylett.0c01297
Authors: Anand S. Subbiah, Furkan H. Isikgor, Calvyn T. Howells, Michaele De Bastiani, Jiang Liu, Erkan Aydin, Francesco Furlan, Thomas G Allen, Fuzong Xu, Shynggys Zhumagali, Sjoerd Hoogland, Edward H. Sargent, Iain McCulloch, Stefaan De Wolf
This study, published in ACS Energy Letters, reports one of the highest PCE for single-junction devices fabricated by lost die coating as well as showing the first example of slot-die coated perovskite/silicon tandems on textured interfaces.
  • slot-die coating
  • perovskite solar cells
  • perovskite silicon tandems
A universal solution processed interfacial bilayer enabling ohmic contact in organic and hybrid optoelectronic devices
Article Year: 2020 DOI:DOI: 10.1039/C9EE02202C
Authors: Joel Troughton, Marios Neophytou, Nicola Gasparini, Akmaral Seitkhan, Furkan Halis Isikgor, Xin Song, Yen-Hung Lin, Tong Liu, Hendrik Faber, Emre Yengel, Jan Kosco, Marek F. Oszajca, Benjamin Hartmeier, Michael Rossier, Norman A. Lüchinger, Leonidas Tsetseris, Henry J. Snaith, Stefaan De Wolf, Thomas D. Anthopoulos, Iain McCulloch, Derya Baran
Efficient tandem solar cells with solution-processed perovskite on textured crystalline silicon
Report Year: 2020 DOI:DOI: 10.1126/science.aaz3691
Authors: Yi Hou, Erkan Aydin, Michele De Bastiani, Chuanxiao Xiao, Furkan H. Isikgor, Ding-Jiang Xue, Bin Chen, Hao Chen, Behzad Bahrami, Ashraful H. Chowdhury, Andrew Johnston, Se-Woong Baek, Ziru Huang, Mingyang Wei, Yitong Dong, Joel Troughton, Rawan Jalmood, Alessandro J. Mirabelli, Thomas G. Allen, Emmanuel Van Kerschaver, Makhsud I. Saidaminov, Derya Baran, Qiquan Qiao, Kai Zhu, Stefaan De Wolf, Edward H. Sargent
Growing perovskite on textured silicon - this report published in Science demonstrates the solution-processed perovskites on textured c-Si bottom cells in tandem configuration. Textured interfaces enable improved light coupling and efficient charge extraction and result in 25.7% certified monolithic tandem solar cells.
  • Perovskite
  • silicon solar cell
  • Perovskite/silicon tandem solar cells
  • textured interfaces
Autonomous MXene-PVDF actuator for flexible solar trackers
Article Year: 2020 DOI:https://doi.org/10.1016/j.nanoen.2020.105277
Authors: Shaobo Tu, Lujia Xu, Jehad K. El-Demellawi, Hanfeng Liang, Xiangming Xu, Sergei Lopatin, Stefaan De Wolf, Xixiang Zhang, Husam N. Alshareef
  • Surface plasmons
  • Photothermal-thermomechanical actuator
  • Solar tracking
  • PV efficiency
  • Output power
Impact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages
Article Year: 2020 DOI:https://doi.org/10.1021/acs.jpcc.0c08193
Authors: Martin Ledinský, Ales Vlk, Tereza Schönfeldová, Jakub Holovsky, Erkan Aydin, Hoang X. Dang, Zdenka Hajkova, Lucie Landová, Jan Valenta, Antonín Fejfar, Stefaan De Wolf
This study, which took place in JPCC, demonstrates the correlation between the Urbach energy of perovskite absorbers and open-circuit voltage deficiency at the solar cell level.
  • thin films
  • Solar cells
  • Defects
  • Perovskites
  • Materials
Polymeric Electron-Selective Contact for Crystalline Silicon Solar Cells with an Efficiency Exceeding 19%
Letter Year: 2020 DOI:https://doi.org/10.1021/acsenergylett.0c00110
Authors: Wenbo Ji, Thomas G Allen, Xinbo Yang, Guosong Zeng, Stefaan De Wolf, Ali Javey
This study presents that polyethyleneimine (b-PEI), which is Lewis base polymer, performs as an efficient electron transport layer for c-Si solar cells.
  • c-Si solar cells
  • polyethyleneimine
  • electron-selective contact
  • silicon heterojunction (SHJ)
Enhanced optical path and electron diffusion length enable high-efficiency perovskite tandems
Article Year: 2020 DOI:https://doi.org/10.1038/s41467-020-15077-3
Authors: Bin Chen, Se-Woong Baek, Yi Hou, Erkan Aydin, Michaele De Bastiani, Benjamin Scheffel, Andrew Proppe, Ziru Huang, Mingyang Wei, Ya-Kun Wang, Eui-Hyuk Jung, Thomas G Allen, Emmanuel Van Kerschaver, F. Pelayo García de Arquer, Makhsud I. Saidaminov, Sjoerd Hoogland, Stefaan De Wolf, Edward H. Sargent
This study shows 28.2% lab-scale mechanically stacked perovskite/silicon tandem solar cells in collaboration with Sargent Group from the University of Toronto - published in Nature Communications
  • Perovskite
  • silicon heterojunction (SHJ)
  • Perovskite/silicon tandem solar cells
  • Optical Path
  • passivation
Damp-Heat-Stable, High-Efficiency, Industrial-Size Silicon Heterojunction Solar Cells
Article Year: 2020 DOI:https://doi.org/10.1016/j.joule.2020.03.003
Authors: Wenzhu Liu, Liping Zhang, Xinbo Yang, Jianhua Shi, Lingling Yan, Lujia Xu, Zhuopeng Wu, Renfang Chen, Jun Peng, Jingxuan Kang, Kai Wang, Fanying Meng, Stefaan De Wolf, Zhengxin Liu

This study, published in Joule, reports 23.9%-efficient 6-in silicon heterojunction solar cells with improved damp-heat-stability for aiming the mass production.

  • silicon heterojunction (SHJ)
  • damp-heat test
Scaling-up perovskite solar cells on hydrophobic surfaces
Full Paper Year: 2020 DOI:https://doi.org/10.1016/j.nanoen.2020.105633
Authors: Furkan H. Isikgor, Anand S. Subbiah, Mathan K. Eswaran, Calvyn T. Howells, Aslihan Babayigit, Michele De Bastiani, Emre Yengel, Jiang Liu, Francesco Furlan, George T. Harrison, Shynggys Zhumagali, Jafar I.Khan, Frédéric Laquai, Thomas D. Anthopoulos, Iain McCulloch, Udo Schwingenschlögl, Stefaan De Wolf
In this work, we explore the underlying reasons for scaling losses of perovskite solar cells, especially for the p-i-n configuration, and have successfully reduced this scaling loss to ~0.9%. With a comprehensive understanding of the underlying mechanisms, high-quality PSCs with a PCE of 20.3% for 2 cm2 devices and 19.8% for 6.8 cm2 mini-modules were obtained.
  • perovskite solar cells
  • scalable
  • large area
  • hidrophobic PTAA substrate
  • binding energy
  • pinholes
Intrinsic Silicon Buffer Layer Improves Hole‐Collecting Poly‐Si Passivating Contact
Full Paper Year: 2020 DOI:https://doi.org/10.1002/admi.202000188
Authors: Jingxuan Kang, Wenzhu Liu, Thomas G Allen, Michele De Bastiani, Xinbo Yang, Stefaan De Wolf

This study, which develops a strategy to circumvent the problem of boron diffusion into the silicon, took place in the recent issue of Advanced Materials Interfaces. This study is the first publication KPV-LAB in the field of poly‐Si passivating contact solar cells.

  • Passivated Contact
  • silicon solar cell
  • polycrystalline silicon
Self-Assembled Monolayer Enables Hole Transport Layer-Free Organic Solar Cells with 18% Efficiency and Improved Operational Stability
Letter Year: 2020 DOI:https://doi.org/10.1021/acsenergylett.0c01421
Authors: Yuanbao Lin, Yuliar Firdaus, Furkan H. Isikgor, Mohamad Insan Nugraha, Emre Yengel, George T. Harrison, Rawad Hallani, Abdulrahman El-Labban, Hendrik Faber, Chun Ma, Xiaopeng Zheng, Anand Subbiah, Calvyn T. Howells, Osman M. Bakr, Iain McCulloch, Stefaan De Wolf, Leonidas Tsetseris, Thomas D. Anthopoulos
  • Power conversion efficiency
  • Conjugated polymers
  • Electrodes
  • Electrochemical cells
  • Solar cells
In Situ Plasma‐Grown Silicon‐Oxide for Polysilicon Passivating Contacts
Communication Year: 2020 DOI:https://doi.org/10.1002/admi.202000589
Authors: Areej Alzahrani, Thomas G. Allen, Michaele De Bastiani, Emmanuel Van Kerschaver, George T. Harrison, Wenzhu Liu, Stefaan De Wolf
Areej's in situ plasma approach offers excellent thickness control and superior structural integrity upon thermal annealing at 1000 °C. This study, which gives implied open‐circuit voltage exceeding 700 mV published in Advanced Materials Interfaces.
  • polysilicon passivating contacts
  • silicon
  • Solar cells
Atomic Layer Deposition of Vanadium Oxide as Hole‐Selective Contact for Crystalline Silicon Solar Cells
Full Paper Year: 2020 DOI:https://doi.org/10.1002/aelm.202000467
Authors: Xinbo Yang, Hang Xu, Wenzhu Liu, Qunyu Bi, Lujia Xu, Jingxuan Kang, Mohamed N. Hedhili, Baoquan Sun, Xiaohong Zhang, Stefaan De Wolf
  • Passivating contact
  • silicon solar cell
  • vanadium oxide
Recombination junctions for efficient monolithic perovskite-based tandem solar cells: physical principles, properties, processing and prospects
Review Year: 2020 DOI:https://doi.org/10.1039/D0MH00990C
Authors: Michele De Bastiani, Anand S. Subbiah, Erkan Aydin, Furkan H. Isikgor, Thomas G. Allen, Stefaan De Wolf
This paper, published in Materials Horizons, reviews the state-of-the-art recombination junction which has been used for perovskite-based tandems and explains the fundamental working principles behind it.
  • perovskite silicon tandems
  • recombination junctions
  • perovskite perovskite tandems
  • perovskite CIGS tandems
Defect Passivation in Perovskite Solar Cells by Cyano‐Based π‐Conjugated Molecules for Improved Performance and Stability
Full Paper Year: 2020 DOI:https://doi.org/10.1002/adfm.202002861
Authors: Kai Wang, Jiang Liu, Jun Yin, Erkan Aydin, George T. Harrison, Wenzhu Liu, Shanyong Chen, Omar F. Mohammed, Stefaan De Wolf
This study demonstrates improved performance and stability via in-house synthesized organic cyano‐based π‐conjugated molecules. Kai Wang's this passivation study came out in Advanced Functional Materials.
  • conjugated molecules
  • defect passivation
  • increased stability
  • perovskite solar cells
Ambient blade coating of mixed cation, mixed halide perovskites without dripping: in situ investigation and highly efficient solar cells
Article Year: 2020 DOI:DOI https://doi.org/10.1039/C9TA12890E
Authors: Ming-Chung Tang, Yuanyuan Fan, Dounya Barrit, Xiaoming Chang, Hoang X. Dang, Ruipeng Li, Kai Wang, Detlef-M. Smilgies, Shengzhong (Frank) Liu, Stefaan De Wolf, Thomas D. Anthopoulos, Kui Zhao, Aram Amassian
Passivating contacts for crystalline silicon solar cells
Review Year: 2019 DOI:https://doi.org/10.1038/s41560-019-0463-6
Authors: Thomas G. Allen, James Bullock, Xinbo Yang, Ali Javey, Stefaan De Wolf
A comprehensive review covering the passivating contacts for silicon solar cells.
  • Silicon solar cells
  • passivating contacts
Dual-Function Electron-Conductive, Hole-Blocking Titanium Nitride Contacts for Efficient Silicon Solar Cells
Article Year: 2019 DOI:https://doi.org/10.1016/j.joule.2019.03.008
Authors: Xinbo Yang, Wenzhu Liu, Michele De Bastiani, Thomas G Allen, Jingxuan Kang, Hang Xu, Erkan Aydin, Lujia Xu, Qunyu Bi, Hoang Dang, Esra AlHabshi, Konstantinos Kotsovos, Ahmed AlSaggaf, Issam Gereige, Yimao Wan, Jun Peng, Christian Samundsett, Andres Cuevas
  • titanium nitride
  • Passivating contact
  • electron-selective contact
  • hole blocking
  • silicon solar cell
Terawatt-scale photovoltaics: Transform global energy
Insights Year: 2019 DOI:DOI: 10.1126/science.aaw1845
Authors: Nancy M. Haegel, Harry Atwater Jr., Teresa Barnes, Christian Breyer, Anthony Burrell, Yet-Ming Chiang, Stefaan De Wolf, Bernhard Dimmler, David Feldman, Stefan Glunz, Jan Christoph Goldschmidt, David Hochschild, Ruben Inzunza, Izumi Kaizuka, Ben Kroposki
  • Solar cells
  • terwatt scale photovoltaics
Zr‐Doped Indium Oxide (IZRO) Transparent Electrodes for Perovskite‐Based Tandem Solar Cells
Article Year: 2019 DOI:https://doi.org/10.1002/adfm.201901741
Authors: Erkan Aydin, Michele De Bastiani, Xinbo Yang, Muhammad Sajjad, Faisal Aljamaan, Yury Smirnov, Mohamed Nejib Hedhili, Wenzhu Liu, Thomas G Allen, Lujia Xu, Emmanuel Van Kerschaver, Monica Morales-Masis, Udo Schwingenschlögl, Stefaan De Wolf
This study unveils the potential of the Zr‐doped indium oxide (IZRO) transparent electrodes for perovskite-based tandem solar cells due to its very high electron mobility (up to ≈77 cm2 V−1 s−1), highly infrared transparency and very low sheet resistance (≈18 Ω ohm/sq)
  • high mobility
  • improved near-infrared response
  • indium zirconium oxide
  • perovskite tandem solar cells
  • trqnsparent electrodes
Temperature Dependence of the Urbach Energy in Lead Iodide Perovskites
Article Year: 2019 DOI:https://doi.org/10.1021/acs.jpclett.9b00138
Authors: Martin Ledinský, Tereza Schönfeldová, Jakub Holovsky, Erkan Aydin, Zdeňka Hájková, Neda Neykova, Antonín Fejfar, Stefaan De Wolf, Lucie Landová
  • Perovskites
  • CH3NH3Pbl3
  • Urbach Energy
  • temperature dependence
  • Urbach Focus
Metal-induced gap states in passivating metal-silicon contacts
Letter Year: 2019 DOI:https://doi.org/10.1063/1.5066423
Authors: Muhammad Sajjad, Xinbo Yang, Pietro Altermatt, Nirpendra Singh, Udo Schwingenschlögl, Stefaan De Wolf
  • Semiconductors
  • Density functional theory
  • First-principle calculations
  • passivation
Carrier Extraction from Perovskite to Polymeric Charge Transport Layers Probed by Ultrafast Transient Absorption Spectroscopy
Letter Year: 2019 DOI:https://doi.org/10.1021/acs.jpclett.9b02502
Authors: Esma Ugur, Jafar Iqbal Khan, Erkan Aydin, Mingcong Wang, Mindaugas Kirkus, Marios Neophytou, Iain McCulloch, Stefaan De Wolf, Frédéric Laquai
 
  • perovskite solar cells
  • ultrafast spectroscopy
  • interface recombination
  • carrier dynamics
  • hole extraction
Poly-Silicon Passivating Contacts for Silicon Solar Cells: Interface Passivation and Carrier Transport Mechanism
Article Year: 2019 DOI:https://doi.org/10.1021/acsaem.8b02149
Authors: Wenzhu Liu, Xinbo Yang, Jingxuan Kang, Shuai Li, Lujia Xu, Song Zhang, Hang Xu, Jun Peng, Feng Xie, Jui-Han Fu, Kai Wang, Jiang Liu, Areej Alzahrani, Stefaan De Wolf
  • silicon solar cell
  • tunnel oxide passivating contacts
  • subnanometer pits pinholes
  • unpin Fermi level
Dip Coating Passivation of Crystalline Silicon by Lewis Acids
Article Year: 2019 DOI:https://doi.org/10.1021/acsnano.9b01038
Authors: Wenbo Ji, Yingbo Zhao, Hossain M. Fahad, James Bullock, Thomas G Allen, Der-Hsien Lien, Stefaan De Wolf, Ali Javey
  • charge transfer
  • crystalline silicon
  • Lewis acids
  • Nafion
  • room-temperature passivation
Defect and Contact Passivation for Perovskite Solar Cells
Review Year: 2019 DOI:https://doi.org/10.1002/adma.201900428
Authors: Erkan Aydin, Michaele De Bastiani, Stefaan De Wolf
A comprehensive review on the passivation routes for perovskite solar cells toward the Shockley–Queisser limit.
  • contacts
  • hysteresis
  • passivation
  • Perovskite
  • recombination
  • solar cell
  • stability
Mitigating Plasmonic Absorption Losses at Rear Electrodes in High‐Efficiency Silicon Solar Cells Using Dopant‐Free Contact Stacks
Full Paper Year: 2019 DOI:https://doi.org/10.1002/adfm.201907840
Authors: Sihua Zhong, Julie Dreon, Quentin Jeangros, Erkan Aydin, Stefaan De Wolf, Fan Fu, Mathieu Boccard, Christophe Ballif
  • carrier-selective contact
  • c-Si solar cells
  • dopant-free contacts
  • plasmonic absoprtion
  • ZnO
Enhancing the charge extraction and stability of perovskite solar cells using strontium titanate (SrTiO3) electron transport layer
Article Year: 2019 DOI:https://doi.org/10.1021/acsaem.9b01567
Authors: Marios Neophytou, Michele De Bastiani, Nicola Gasparini, Erkan Aydin, Esma Ugur, Akmaral Seitkhan, Floriana Moruzzi, Yasmin Choaie, Alexandra J Ramadan, Joel Troughton, Rawad Hallani, Achilleas Savva, Leonidas Tsetseris, Sahika Inal, Derya Baran, Frédéric Laquai, Thomas D. Anthopoulos, Henry J. Snaith, Stefaan De Wolf, Iain McCulloch
  • electron-selective contact
  • strontium titanate
  • perovskite solar cells
Multi-cation Synergy Suppresses Phase Segregation in Mixed-Halide Perovskites
Article Year: 2019 DOI:https://doi.org/10.1016/j.joule.2019.05.016
Authors: Hoang Dang, Kai Wang, Masould Ghasemi, Ming-Chung Tang, Michele De Bastiani, Erkan Aydin, Emilie Dauzon, Dounya Barrit, Jun Peng, Detlef-M. Smigies, Stefaan De Wolf, Aram Amassian
  • hybrid perovskites
  • Solar cells
  • in situ characterization
  • phase transformation
  • phase segregation
Triarylphosphine Oxide as Cathode Interfacial Material for Inverted Perovskite Solar Cells
Article Year: 2019 DOI:https://doi.org/10.1002/admi.201900434
Authors: Kai Wang, Marios Neophytou, Erkan Aydin, Mingcong Wang, Thomas Laurent, George T. Harrison, Jiang Liu, Wenzhu Liu, Michele De Bastiani, Jafar I.Khan, Thomas D. Anthopoulos, Frédéric Laquai, Stefaan De Wolf
  • cathode interlayer interface engineering
  • organic molecule
  • p-i-n perovskite solar cell
  • semitransparent solar cell
Visualization of Charge Carrier Trapping in Silicon at the Atomic Surface Level Using Four-Dimensional Electron Imaging
Letter Year: 2019 DOI:https://doi.org/10.1021/acs.jpclett.9b00598
Authors: Basamat S. Shaheen, Ahmed M. El-Zohry, Jun Yin, Michele De Bastiani, Stefaan De Wolf, Osman M. Bakr, Omar F. Mohammed
  • silicon
  • 4D microscopy
Field Performance versus Standard Test Condition Efficiency of Tandem Solar Cells and the Singular Case of Perovskites/Silicon Devices
Year: 2018 DOI:https://doi.org/10.1021/acs.jpclett.7b02277
Authors: Olivier Dupré, Björn Niesen, Stefaan De Wolf, Christophe Ballif
  • tandem solar cells
  • Field Performance
  • Perovskites/Silicon Devices
Toward Annealing‐Stable Molybdenum‐Oxide‐Based Hole‐Selective Contacts For Silicon Photovoltaics
Year: 2018 DOI:https://doi.org/10.1002/solr.201700227
Authors: Stephanie Essig, Julie Dréon, Esteban Rucavado, Mathias Mews, Takashi Koida, Mathieu Boccard, Jérémie Werner, Jonas Geissbühler, Philipp Loper, Monica Morales-Masis, Lars Korte, Stefaan De Wolf, Christophe Ballif
  • heterojunctions
  • hydrogen
  • metal oxide
  • silicon solar cell
Hole-Collection Mechanism in Passivating Metal-Oxide Contacts on Si Solar Cells: Insights From Numerical Simulations
Year: 2018 DOI:10.1109/JPHOTOV.2018.2796131
Authors: Ramachandran Ammapet Vijayan, Stephanie Essig, Stefaan De Wolf, Bairava Ganesh Ramanathan, Philipp Loper, Christophe Ballif, Muthubalan Varadharajaperumal
  • Hole collection
  • Passivated Contact
  • silicon heterojunction (SHJ)
  • Solar cells
  • simulation
  • transition metal oxides
Interfacial Dynamics and Contact Passivation in Perovskite Solar Cells
Article Year: 2018 DOI:https://doi.org/10.1002/aelm.201800500
Authors: Michele De Bastiani, Erkan Aydin, Thomas G Allen, Daniel Walter, Andreas Fell, Jun Peng, Nicola Gasparini, Derya Baran, Klaus Weber, Thomas P.White, Stefaan De Wolf, Joel Troughton
  • contacts passivation
  • hysteresis
  • ion migrations
  • Perovskite
  • Solar cells
Tantalum Nitride Electron Selective Contact for Crystalline Silicon Solar Cells
Article Year: 2018 DOI:https://doi.org/10.1002/aenm.201800608
Authors: Xinbo Yang, Erkan Aydin, Hang Xu, Jingxuan Kang, Mohamed Hedhili, Wenzhu Liu, Yimao Wan, Jun Peng, Christian Samundsett, Andres Cuevas, Stefaan De Wolf
​​With this study, for the first time in literature Tantalum Nitride has been used as passivating contact on silicon solar cells.
  • hole blocking
  • Passivating contact
  • silicon solar cell
  • tantalum nitride
Improved Optics in Monolithic Perovskite/Silicon Tandem Solar Cells with a Nanocrystalline Silicon Recombination Junction
Year: 2018 DOI:https://doi.org/10.1002/aenm.201701609
Authors: Florent Sahli, Brett A Kamino, Jeremie Werner, Matthias Bräuninger, Bertrand Paviet-Salomon, Loris Barraud, Raphaël Monnard, Johannes Peter Seif, Andrea Tomasi, Quentin Jeangros, Aïcha Hessler‐Wyser, Stefaan De Wolf, Matthieu Despeisse, Sylvain Nicolay, B
  • microcrystalline
  • multijunction
  • organic-inorganic perovskite
  • silicon heterojunction (SHJ)
  • Tunnel junction
A Universal Double-Side Passivation for High Open-Circuit Voltage in Perovskite Solar Cells: Role of Carbonyl Groups in Poly(methyl methacrylate)
Year: 2018 DOI:https://doi.org/10.1002/aenm.201801208
Authors: Jun Peng, Jafar I.Khan, Wenzhu Liu, Esma Uğur, The Duong, Yiliang Wu, Heping Shen, Kai Wang, Hoang Dang, Erkan Aydin, Xinbo Yang, Yimao Wan, Klaus Weber, Kylie R. Catchpole, Frédéric Laquai, Stefaan De Wolf, Thomas P.White
Thanks to PMMA: PCBM Double-side passivation, very high‐efficiency (≈20.8%) perovskite cells with some of the highest open circuit voltages (1.22 V) reported for the same 1.6 eV bandgap are demonstrated.
  • carbonyl group
  • nonradiative recombination
  • passivation
  • perovskite solar cells
  • undercoordinated Pb atoms
Amorphous gallium oxide grown by low-temperature PECVD
Year: 2018 DOI:https://doi.org/10.1116/1.5018800
Authors: Eiji Kobayashi, Mathieu Boccard, Quentin Jeangros, Nathan Rodkey, Daniel Vresilovic, Aicha Hessler-Wyser, Max Döbeli, Daniel Franta, Stefaan De Wolf, Monica Morales-Masis, Christophe Ballif
  • Amorphous gallium oxide
  • low-temperature PECVD
Room-Temperature Sputtered Nanocrystalline Nickel Oxide as Hole Transport Layer for p−i−n Perovskite Solar Cells
Article Year: 2018 DOI:https://doi.org/10.1021/acsaem.8b01263
Authors: Erkan Aydin, Joel Troughton, Michaele De Bastiani, Esma Uğur, Muhammad Sajjad, Areej Alzahrani, Marios Neophytou, Udo Schwingenschlögl, Frédéric Laquai, Derya Baran, Stefaan De Wolf
This study unveils the potential of the room-temperature processed sputtered-NiOx hole transport layers for the single junction perovskites and perovskite-based tandem solar cells, specifically which has rough bottom cells.
  • perovskite solar cells
  • room-temperature processing
  • sputtering
  • nickel oxide
  • conformal deposition
  • large area
  • p-i-n perovskite configuration
Interdigitated back contact silicon heterojunction solar cells featuring an interband tunnel junction enabling simplified processing
Year: 2018 DOI:https://doi.org/10.1016/j.solener.2018.01.066
Authors: B Paviet-Salomon, Andrea Tomasi, D Lachenal, N Badel, Gabriel Christmann, Loris Barraud, Antoine Descoeudres, Jonas Geissbühler, A Faes, Quentin Jeangros, Johannes Peter Seif, Sylvain Nicolay, B Strahm, Stefaan De Wolf, Christophe Ballif, Matthieu Despeisse
  • Passivating contact
  • interdigitated back contact
  • Tunnel junction
  • silicon solar cell
Device physics underlying silicon heterojunction and passivating‐contact solar cells: A topical review
Year: 2018 DOI:https://doi.org/10.1002/pip.2959
Authors: Raghu Vamsi Krishna Chavali, Stefaan De Wolf, Muhammad Ashraful Alam
  • amorphous semiconductors
  • current-voltage characteristics
  • heterojunctions
  • process control
  • silicon
  • modeling
  • simulation
  • passivating contacts
A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells
Year: 2017 DOI:https://doi.org/10.1002/aenm.201602606
Authors: Thomas G Allen, James Bullock, Quentin Jeangros, Christian Samundsett, Yimao Wan, Jie Cui, Aïcha Hessler‐Wyser, Stefaan De Wolf, Ali Javey, Andres Cuevas
  • Titania
  • Passivated Contact
  • silicon solar cell
Photocurrent Spectroscopy of Perovskite Layers and Solar Cells: A Sensitive Probe of Material Degradation
Year: 2017 DOI:https://doi.org/10.1021/acs.jpclett.6b02854
Authors: Jakub Holovsky, Stefaan De Wolf, Jeremie Werner, Zdenek Remes, Martin Muller, Neda Neykova, Martin Ledinský, Ladislava Cerna, Pavel Hrzina, Philipp Loper, Bjoern Niesen, Christophe Ballif
  • Spectroscopy
  • Perovskite
  • Degradation
Industrially feasible, dopant‐free, carrier‐selective contacts for high‐efficiency silicon solar cells
Year: 2017 DOI:https://doi.org/10.1002/pip.2901
Authors: Xinbo Yang, Klaus Weber, Ziv Hameiri, Stefaan De Wolf
  • carrier-selective contact
  • titanium oxide
  • silicon solar cell
Impact of organic overlayers on a-Si:H/c-Si surface potential
Year: 2017 DOI:https://doi.org/10.1063/1.4980047
Authors: Johannes P Seif, Bjoern Niesen, Andrea Tomasi, Christophe Ballif, Stefaan De Wolf
  • organic layers
  • SHJ
  • surface potential
Increasing the efficiency of silicon heterojunction solar cells and modules by light soaking
Year: 2017 DOI:https://doi.org/10.1016/j.solmat.2017.06.023
Authors: Eiji Kobayashi, Stefaan De Wolf, Jacques Levrat, Antoine Descoeudres, Matthieu Despeisse, Franz-Josef Haug, Christophe Ballif
  • Solar cells
  • Solar module
  • silicon heterojunction (SHJ)
  • Passivating contact
  • Light soaking
  • Fill factor
Optical Evaluation of the Rear Contacts of Crystalline Silicon Solar Cells by Coupled Electromagnetic and Statistical Ray-Optics Modeling
Year: 2017 DOI:10.1109/JPHOTOV.2017.2663658
Authors: Ali Dabirian, Monica Morales-Masis, Franz-Josef Haug, Stefaan De Wolf, Christophe Ballif
  • Ray-Optics Modeling
  • silicon solar cell
Simple processing of back-contacted silicon heterojunction solar cells using selective-area crystalline growth
Year: 2017 DOI:https://doi.org/10.1038/nenergy.2017.62
Authors: Andrea Tomasi, Bertrand Paviet-Salomon, Quentin Jeangros, Jan Haschke, Gabriel Christmann, Loris Barraud, Antoine Descoeudres, Johannes Peter Seif, Sylvain Nicolay, Matthieu Despeisse, Christophe Ballif, Stefaan DeWolf
  • silicon heterojunction (SHJ)
  • Back Contacted Solar Cells
The impact of silicon solar cell architecture and cell interconnection on energy yield in hot & sunny climates
Year: 2017 DOI:10.1039/C7EE00286F
Authors: Jan Haschke, Johannes P Seif, Yannick Riesen, Andrea Tomasi, Jean Cattin, Loïc Tous, Patrick Choulat, Monica Aleman, Emanuele Cornagliotti, Angel Uruena, Richard Russell, Filip Duerinckx, Jonathan Champliaud, Jacques Levrat, Amir A Abdallah, Brahim Aïssa
  • cell architecture
  • cell interconnection
  • hot climates
A Generalized Theory Explains the Anomalous Suns– Voc Response of Si Heterojunction Solar Cells
Year: 2017 DOI:10.1109/JPHOTOV.2016.2621346
Authors: Raghu Vamsi Krishna Chavali, Jian V Li, Corsin Battaglia, Stefaan De Wolf, Jeffery Lynn Gray, Muhammad Ashraful Alam
  • Suns-Voc
  • Heterojunction Solar Cells
  • numerical simulations
Towards an optimum silicon heterojunction solar cell configuration for high temperature and high light intensity environment
Year: 2017 DOI:https://doi.org/10.1016/j.egypro.2017.09.307
Authors: Amir A Abdallah, Ounsi El Daif, Brahim Aïssa, Maulid Kivambe, Nouar Tabet, Johannes Peter Seif, Jan Haschke, Jean Cattin, Mathieu Boccard, Stefaan De Wolf, Christophe Ballif
  • silicon heterojunction (SHJ)
  • temperature coefficient
  • irradiance
  • current-voltage curve
HIT Solar Cell With V2Ox Window Layer
Year: 2017 DOI:https://doi.org/10.1557/adv.2017.465
Authors: Stefaan De Wolf, Erenn Ore, Gehan Amaratunga
  • photovoltaic
  • Si
  • oxide
Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells After Exposure to Humid Air
Year: 2017 DOI:10.1109/JPHOTOV.2017.2748720
Authors: Zhaoning Song, Jérémie Werner, Suneth C Watthage, Florent Sahli, Niraj Shrestha, Stefaan De Wolf, Christophe Ballif, Randy J Ellingson, Michael J Heben, Björn Niesen, Adam B Phillips
  • Degradation
  • light beam induced current (LBIC)
  • Perovskite
  • silicon
  • tandem solar cells
Transparent electrodes for efficient optoelectronics
Year: 2017 DOI:https://doi.org/10.1002/aelm.201600529
Authors: Monica Morales-Masis, Stefaan De Wolf, Rachel Woods-Robinson, Joel W Ager, Christophe Ballif
  • Transparent Electrodes
  • Optoelectronics
Light-induced performance increase of silicon heterojunction solar cells
Year: 2016 DOI:https://doi.org/10.1063/1.4964835
Authors: Eiji Kobayashi, Stefaan De Wolf, Jacques Levrat, Gabriel Christmann, Antoine Descoeudres, Sylvain Nicolay, Matthieu Despeisse, Yoshimi Watabe, Christophe Ballif
  • silicon heterojunction (SHJ)
  • surface passivation
  • recombination
Profilometry of thin films on rough substrates by Raman spectroscopy
Year: 2016 DOI:https://doi.org/10.1038/srep37859
Authors: Martin Ledinský, Bertrand Paviet-Salomon, Aliaksei Vetushka, Jonas Geissbühler, Andrea Tomasi, Matthieu Despeisse, Stefaan De Wolf, Christophe Ballif, Antonín Fejfar
  • Solar cells
  • Surfaces
  • interfaces
  • thin films
  • Two-dimensional materials
Nanocrystalline silicon carrier collectors for silicon heterojunction solar cells and impact on low-temperature device characteristics
Year: 2016 DOI:10.1109/JPHOTOV.2016.2604574
Authors: Gizem Nogay, Johannes Peter Seif, Yannick Riesen, Andrea Tomasi, Quentin Jeangros, Nicolas Wyrsch, Franz-Josef Haug, Stefaan De Wolf, Christophe Ballif
  • transport
  • contact resistivity
  • nanocrystalline silicon
  • Schottky barrier
  • silicon heterojunction (SHJ)
  • Solar cells
  • temperature dependence
A Practical Efficiency Target for Perovskite/Silicon Tandem Solar Cells
Article Year: 2025
Authors: Thomas G. Allen, Esma Ugur, Erkan Aydin, Anand Selvin Subbiah, Stefaan DeWolf
  • Perovskite
  • perovskite /silicon tandem
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