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2020

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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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