Evolution of Photoluminescence, Raman, and Structure of CH(3)NH(3)PbI(3) Perovskite Microwires Under Humidity Exposure.
Evolution of Photoluminescence, Raman, and Structure of CH(3)NH(3)PbI(3) Perovskite Microwires Under Humidity Exposure.
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CH3NH3PbI3 钙钛矿微线在潮湿环境下的光致发光、拉曼和结构的演变
DOI：
10.1186/s11671-018-2470-0
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发表时间：
2018-03-07
影响因子：
--
通讯作者：
Gao B
中科院分区：
文献类型：
--
作者：
Segovia R;Qu G;Peng M;Sun X;Shi H;Gao B
采用光致发光（PL）光谱、拉曼光谱和X射线衍射（XRD）研究了CH 3 NH3 PbI 3钙钛矿自组装有机-无机微线（MWs）在潮湿环境中暴露沿着周的行为。我们发现，除了常见的钙钛矿分解成PbI 2和形成水合相，湿度诱导了在最初几周逐渐PL红移，这是稳定的更长的曝光时间（约21 nm的降解过程）和强度增强。原始钙钛矿拉曼带和XRD反射在湿度下略微偏移，表明MWs晶格的缺陷形成和结构畸变。通过关联PL、拉曼和XRD结果，我们认为MWs PL发射的红移是由晶格中的水分子的掺入和通过湿气诱导的亚能隙陷阱态的辐射复合引起的结构无序引起的。我们的研究为有机-无机钙钛矿材料在湿度暴露时的光学和结构响应提供了见解。本文的在线版本（10.1186/s11671-018-2470-0）包含补充材料，可供授权用户使用。
Self-assembled organic-inorganic CH3NH3PbI3 perovskite microwires (MWs) upon humidity exposure along several weeks were investigated by photoluminescence (PL) spectroscopy, Raman spectroscopy, and X-ray diffraction (XRD). We show that, in addition to the common perovskite decomposition into PbI2 and the formation of a hydrated phase, humidity induced a gradual PL redshift at the initial weeks that is stabilized for longer exposure (~ 21 nm over the degradation process) and an intensity enhancement. Original perovskite Raman band and XRD reflections slightly shifted upon humidity, indicating defects formation and structure distortion of the MWs crystal lattice. By correlating the PL, Raman, and XRD results, it is believed that the redshift of the MWs PL emission was originated from the structural disorder caused by the incorporation of H2O molecules in the crystal lattice and radiative recombination through moisture-induced subgap trap states. Our study provides insights into the optical and structural response of organic-inorganic perovskite materials upon humidity exposure. The online version of this article (10.1186/s11671-018-2470-0) contains supplementary material, which is available to authorized users.
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影响因子：
9
作者：
Ha, Son Tung;Liu, Xinfeng;Xiong, Qihua
通讯作者：
Xiong, Qihua
影响因子：
17.1
作者：
Eperon, Giles E.;Habisreutinger, Severin N.;Snaith, Henry J.
通讯作者：
Snaith, Henry J.
影响因子：
10.8
作者：
Frost JM;Butler KT;Brivio F;Hendon CH;van Schilfgaarde M;Walsh A
通讯作者：
Walsh A
影响因子：
1.9
作者：
Brittman S;Adhyaksa GW;Garnett EC
通讯作者：
Garnett EC
影响因子：
8.6
作者：
Leguy, Aurelien M. A.;Hu, Yinghong;Barnes, Piers R. F.
通讯作者：
Barnes, Piers R. F.