Reference : Coevaporation Stabilizes Tin-Based Perovskites in a Single Sn-Oxidation State
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/52275
Coevaporation Stabilizes Tin-Based Perovskites in a Single Sn-Oxidation State
English
Singh, Ajay mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Hieulle, Jeremy mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Ferreira Machado, Joana Andreia mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Gharabeiki, Sevan mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Zuo, Weiwei mailto [Institute for Photovoltaics (IPV), University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany]
Farooq, Muhammad Uzair mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Phirke, Himanshu mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Saliba, Michael mailto [Institute for Photovoltaics (IPV), University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany > > > ; Helmholtz Young Investigator Group FRONTRUNNER, IEK5-Photovoltaik, Forschungszentrum Jülich, 52425, Jülich, Germany]
Redinger, Alex mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
23-Aug-2022
Nano Letters
American Chemical Society
Yes
International
1530-6984
1530-6992
Washington
DC
[en] Perovskite solar cell ; PVD ; Photoluminescence
[en] Chemically processed methylammonium tin-triiodide (CH3NH3SnI3) films include Sn in different oxidation states, leading to poor stability and low power conversion efficiency of the resulting solar cells (PSCs). The development of absorbers with Sn [2+] only has been identified as one of the critical steps to develop all Sn-based devices. Here, we report on coevaporation of CH3NH3I and SnI2 to obtain absorbers with Sn being only in the preferred oxidation state [+2] as confirmed by X-ray photoelectron spectroscopy. The Sn [4+]-free absorbers exhibit smooth highly crystalline surfaces and photoluminescence measurements corroborating their excellent optoelectronic properties. The films show very good stability under heat and light. Photoluminescence quantum yields up to 4 × 10^-3 translate in a quasi Fermi-level splittings exceeding 850 meV under one sun equivalent conditions showing high promise in developing lead-free, high efficiency, and stable PSCs.
Fonds National de la Recherche - FnR ; German Research Foundation (DFG) ; Spanish Ministry of Science and Education ; Federal Ministry for Economic Affairs and Energy ; Israel Ministry of Energy ; European Commission - EC
FnR: 11244141, 11696002, 13390539, 14757355, 12246511, 14735144
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/52275
10.1021/acs.nanolett.2c02204
https://pubs.acs.org/doi/10.1021/acs.nanolett.2c02204
H2020 ; 786483 - Solar Cofund 2 - SOLAR-ERA.NET Cofund 2

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