Environmental Effects on the Photophysics of Organic-Inorganic Halide Perovskites.
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.
Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Cientı́ficas (CSIC), Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, Spain.
Juan F
JF
Galisteo-López
Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Cientı́ficas (CSIC), Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, Spain.
M
M
Anaya
Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Cientı́ficas (CSIC), Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, Spain.
M E
ME
Calvo
Instituto de Ciencia de Materiales de Sevilla, Consejo Superior de Investigaciones Cientı́ficas (CSIC), Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, Spain.
H
H
Míguez
environmental influence; hybrid organic−inorganic materials; perovskite halides; photoluminescence; photophysics