On degradation process of CH3NH3PbI3 film in different humidity conditions

doi:10.3969/j.issn.1000-1565.2019.04.004

Abstract

Abstract: The degradation process of CH₃NH₃PbI₃ films under 15%, 50% and 90% relative humidity(RH)was analyzed.The degradation product of CH₃NH₃PbI₃film in different humidity environments was found to be PbI₂ according to XRD measurement.The intermediate product was also observed in the 90% RH environment, which is similar like(CH₃NH₃)₄PbI₆·2H₂O.CH₃NH₃PbI₃ film exhibits a faster degradation rates in high RH environment.During CH₃NH₃PbI₃ film degradation process its photo induced carriers quantity also decreases with aging time.In high RH environment carriers lifetime of CH₃NH₃PbI₃ film reduces monotonously with aging time.While in low RH environment carrier lifetime increases at first stage of degradation process, which means that low RH atmosphere can passivate defects in CH₃NH₃PbI₃ thin film.

Key words: CH₃NH₃PbI₃ film, degradation process, relative humidity

CLC Number:

TQ613.5

GAO Xiaohe, MA Xiaoyan, GU Yu, ZHAO Mingming, ZHANG Wei, DANG Wei, YUAN Xiaoxian. On degradation process of CH₃NH₃PbI₃ film in different humidity conditions[J]. Journal of Hebei University (Natural Science Edition), 2019, 39(4): 353-358.

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On degradation process of CH₃NH₃PbI₃ film in different humidity conditions

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