Journal
APPLIED PHYSICS LETTERS
Volume 111, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5001843
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Funding
- National Key Research and Development Program of China [2016YFE0110700, 2014CB921104]
- Natural Science Foundation of Shanghai [17ZR1402100]
- Natural Science Foundation of China [11674095]
- China Postdoctoral Science Foundation [2017M611440]
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The photoluminescence (PL) variations of organic-inorganic hybrid lead halide perovskites in different atmospheres are well documented, while the fundamental mechanism still lacks comprehensive understandings. This study reports the reversible optical and electrical properties of methylammonium lead bromide (MAPbBr(3) or CH3NH3PbBr3) single crystals caused by air infiltration. With the change in the surrounding atmosphere from air to vacuum, the PL intensity of perovskite single crystals decreases, while the conductivity increases. By means of first-principles computational studies, the shallow trap states are considered as key elements in PL and conductivity changes. These results have important implications for the characterization and application of organic-inorganic hybrid lead halide perovskites in vacuum. (C) 2017 Author(s).
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