不同湿度环境下CH3NH3PbI3薄膜的退化过程

doi:10.3969/j.issn.1000-1565.2019.04.004

河北大学学报(自然科学版) ›› 2019, Vol. 39 ›› Issue (4): 353-358.DOI: 10.3969/j.issn.1000-1565.2019.04.004

不同湿度环境下CH₃NH₃PbI₃薄膜的退化过程

高晓赫¹,马晓燕¹,谷雨²,赵明明¹,张玮¹,党伟¹,袁小先¹

收稿日期:2018-09-05 出版日期:2019-07-25 发布日期:2019-07-25
通讯作者: 袁小先(1985—),女,河北保定人,河北大学实验师,主要从事新型纳米材料及光电器件研究.E-mail: yuanxiaoxian115@163.com
作者简介:高晓赫(1994—),女,河北保定人,河北大学在读硕士研究生,主要从事光电材料载流子复合动力学研究. E-mail: 1363216933@qq.com
基金资助:
国家自然科学基金资助项目(21503066);河北省自然科学基金资助项目(F2017201136);河北省高等学校科学技术研究项目(ZC2016003)

On degradation process of CH₃NH₃PbI₃ film in different humidity conditions

GAO Xiaohe¹, MA Xiaoyan¹, GU Yu², ZHAO Mingming, ZHANG Wei², DANG Wei¹, YUAN Xiaoxian¹

1.Key Lab of Optic-electronic Information and Materials of Hebei Province, College of Physics Science and Technology, Hebei University, Baoding 071002, China; 2.College of Mathematics and Information Science, Hebei University, Baoding 071002, China

Received:2018-09-05 Online:2019-07-25 Published:2019-07-25

摘要/Abstract

摘要： 实验分析了在15%、50%和90%RH湿度条件下CH₃NH₃PbI₃薄膜退化过程.通过XRD测量发现不同湿度环境中CH₃NH₃PbI₃薄膜的退化产物为PbI₂,且在90%相对湿度(RH)环境下还观测到了退化中间产物水合物(CH₃NH₃)₄PbI₆·2H₂O.不同湿度环境中CH₃NH₃PbI₃薄膜退化速度不同,湿度越大,退化速度越快.通过载流子动力学的测量发现随着退化时间增长,CH₃NH₃PbI₃薄膜光生载流子数量不断减小.低湿度环境下CH₃NH₃PbI₃薄膜在退化过程中表现出缺陷钝化现象,载流子复合寿命随退化时间呈先上升后下降趋势.而在高湿度条件下,CH₃NH₃PbI₃薄膜出现缺陷增加现象,载流子复合寿命随退化时间呈下降趋势.

关键词: CH₃NH₃PbI₃薄膜, 退化过程, 相对湿度

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

中图分类号:

TQ613.5

高晓赫,马晓燕,谷雨,赵明明,张玮,党伟,袁小先. 不同湿度环境下CH₃NH₃PbI₃薄膜的退化过程[J]. 河北大学学报(自然科学版), 2019, 39(4): 353-358.

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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不同湿度环境下CH₃NH₃PbI₃薄膜的退化过程

On degradation process of CH₃NH₃PbI₃ film in different humidity conditions

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