Publications

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