Reference : Co-evaporation of CH3NH3PbI3: How Growth Conditions Impact Phase Purity, Photostricti...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/47204
Co-evaporation of CH3NH3PbI3: How Growth Conditions Impact Phase Purity, Photostriction, and Intrinsic Stability
English
Gallet, Thibaut mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Poeira, Ricardo G. mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Lanzoni, Evandro M. mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Abzieher, Tobias [Light Technology Institute (LTI), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany]
Paetzold, Ulrich W. [Light Technology Institute (LTI), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany > > > ; Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany]
Redinger, Alex mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
6-Jan-2021
ACS Applied Materials and Interfaces
American Chemical Society
13
2
2642–2653
Yes (verified by ORBilu)
International
1944-8244
1944-8252
[en] perovskite ; KPFM ; surface ; co-evaporation ; photostriciton ; solar cells
[en] Hybrid organic–inorganic perovskites are highly promising candidates for the upcoming generation of single- and multijunction solar cells. Despite their extraordinarily good semiconducting properties, there is a need to increase the intrinsic material stability against heat, moisture, and light exposure. Understanding how variations in synthesis affect the bulk and surface stability is therefore of paramount importance to achieve a rapid commercialization on large scales. In this work, we show for the case of methylammonium lead iodide that a thorough control of the methylammonium iodide (MAI) partial pressure during co-evaporation is essential to limit photostriction and reach phase purity, which dictate the absorber stability. Kelvin probe force microscopy measurements in ultrahigh vacuum corroborate that off-stoichiometric absorbers prepared with an excess of MAI partial pressure exhibit traces of low-dimensional (two-dimensional, 2D) perovskites and stacking faults that have adverse effects on the intrinsic material stability. Under optimized growth conditions, time-resolved photoluminescence and work functions mapping corroborate that the perovskite films are less prone to heat and light degradation.
Fonds National de la Recherche - FnR
Sunspot
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/10993/47204
10.1021/acsami.0c19038
https://doi.org/10.1021/acsami.0c19038
PMID: 33405505
FnR ; FNR11244141 > Alex Redinger > SUNSPOT > Surface And Interface Science On Photovoltaic Materials > 15/03/2017 > 14/03/2022 > 2016

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