Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 6, Issue 12, Pages 2200-2205Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b00785
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Funding
- European Research Council under European Union/ERC [307081]
- Spanish Ministry of Economy and Competitiveness [MAT2014-54852-R]
- La Caixa Foundation
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The photophysical properties of films of organic-inorganic lead halide perovskites under different ambient conditions are herein reported. We demonstrate that their luminescent properties are determined by the interplay between photoinduced activation and darkening processes, which strongly depend on the atmosphere surrounding the samples. We have isolated oxygen and moisture as the key elements in each process, activation and darkening, both of which involve the interaction with photogenerated carriers. These findings show that environmental factors play a key role in the performance of lead halide perovskites as efficient luminescent materials.
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