Reference : Coevaporation Stabilizes Tin-Based Perovskites in a Single Sn-Oxidation State

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/52275

Title :	Coevaporation Stabilizes Tin-Based Perovskites in a Single Sn-Oxidation State
Language :	English
Author, co-author :	Singh, Ajay [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Hieulle, Jeremy [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Ferreira Machado, Joana Andreia [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Gharabeiki, Sevan [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Zuo, Weiwei [Institute for Photovoltaics (IPV), University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany]
	Farooq, Muhammad Uzair [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Phirke, Himanshu [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Saliba, Michael [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 [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Publication date :	23-Aug-2022
Journal title :	Nano Letters
Publisher :	American Chemical Society
Peer reviewed :	Yes
Audience :	International
ISSN :	1530-6984
e-ISSN :	1530-6992
City :	Washington
Country :	DC
Keywords :	[en] Perovskite solar cell ; PVD ; Photoluminescence
Abstract :	[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.
Funders :	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
Name of the research project :	FnR: 11244141, 11696002, 13390539, 14757355, 12246511, 14735144
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/10993/52275
DOI :	10.1021/acs.nanolett.2c02204
Other URL :	https://pubs.acs.org/doi/10.1021/acs.nanolett.2c02204
Framework Programme / European Project :	H2020 ; 786483 - Solar Cofund 2 - SOLAR-ERA.NET Cofund 2

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	Fulltext file(s): File Commentary Version Size Access Open access NanoLetters_Coevaporation Stabilizes Tin-Based Perovskites in a Single Sn-Oxidation State.pdf Publisher postprint 2.85 MB View/Open Additional material(s): File Commentary Size Access Open access NanoLetters_nl2c02204_si_001.pdf 1.84 MB View/Open

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