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Initial Stages of Photodegradation of MAPbI3 Perovskite: Accelerated Aging with Concentrated Sunlight / Renjun Guo, Mark V. Khenkin, Georgios E. Arnaoutakis, Nataliya A. Samoylova, Jérémy Barbé, Harrison Ka Hin Lee, Wing Chung Tsoi, Eugene A. Katz

Solar RRL, Start page: 1900270

Swansea University Author: Wing Chung Tsoi

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DOI (Published version): 10.1002/solr.201900270

Abstract

The initial stages of photo‐degradation of CH3NH3PbI3 (MAPbI3) thin films prior to any significant change in light absorption are studied in experiments with independent control of sample temperature and intensity of concentrated sunlight from 50 to 500 suns. Photo‐stability of the MAPbI3 film is re...

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Published in: Solar RRL
ISSN: 2367-198X 2367-198X
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51311
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Abstract: The initial stages of photo‐degradation of CH3NH3PbI3 (MAPbI3) thin films prior to any significant change in light absorption are studied in experiments with independent control of sample temperature and intensity of concentrated sunlight from 50 to 500 suns. Photo‐stability of the MAPbI3 film is revealed to be extremely sensitive to the sample temperature. Under the combined action of light and heat (either by concentrated sunlight or by external heating), a strong reduction of the film photoluminescence (PL) without changes in the perovskite light absorption can be observed during the initial stages of degradation. In contrast, illumination of perovskite films (with intensity up to 500 suns) without heating (using chopped concentrated sunlight) induces considerable PL enhancement while the optical absorption spectrum remains unchanged. With accurate temperature control, aging under concentrated sunlight results in similar instability trends as that under 1 sun.
College: College of Engineering
Start Page: 1900270