Initial Stages of Photodegradation of MAPbI3 Perovskite: Accelerated Aging with Concentrated Sunlight,Solar RRL

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Initial Stages of Photodegradation of MAPbI3 Perovskite: Accelerated Aging with Concentrated Sunlight
Solar RRL ( IF 6.0 ) Pub Date : 2019-07-19 , DOI: 10.1002/solr.201900270
Renjun Guo ₁ , Mark V. Khenkin ₁ , Georgios E. Arnaoutakis ₁ , Nataliya A. Samoylova ₁ , Jérémy Barbé ₂ , Harrison Ka Hin Lee ₂ , Wing Chung Tsoi ₂ , Eugene A. Katz _{1,

3}

Affiliation

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.

中文翻译：

MAPbI3钙钛矿光降解的初始阶段：聚光加速老化

CH的光降解的初始阶段₃ NH ₃碘化铅₃（MAPbI ₃）之前，在光吸收任何显著改变薄膜进行了研究，实验从50到500个太阳的样品温度和聚集的太阳光的强度的独立控制。MAPbI _3的光稳定性胶片对样品温度极为敏感。在光和热的联合作用下（通过聚集的阳光或通过外部加热），在降解的初始阶段可以观察到膜光致发光（PL）的强烈降低，而钙钛矿的光吸收没有变化。相比之下，钙钛矿薄膜（强度最高为500个太阳光）的照射而不加热（使用切碎的集中阳光）会导致PL显着提高，而光吸收光谱保持不变。通过精确的温度控制，在集中阳光下的老化会导致不稳定的趋势与在1个阳光下的不稳定趋势相似。

更新日期：2019-07-19

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