Double functions of porous TiO2 electrodes on CH3NH3PbI3 perovskite solar cells: Enhancement of perovskite crystal transformation and prohibition of short circuiting
Double functions of porous TiO2 electrodes on CH3NH3PbI3 perovskite solar cells: Enhancement of perovskite crystal transformation and prohibition of short circuiting
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DOI：
10.1063/1.4891597
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发表时间：
2014-08-01
期刊：
影响因子：
6.1
通讯作者：
Ito, Seigo
中科院分区：
文献类型：
--
作者：
Murugadoss, Govindhasamy;Mizuta, Gai;Ito, Seigo
为了分析通过连续（两步）沉积过程从六方 PbI2 到 CH3NH3PbI3 的晶体转变，将钙钛矿 CH3NH3PbI3 层沉积在平坦和/或多孔 TiO2 层上。尽管使用小纳米颗粒的较窄孔隙阻碍了有效转变，但多孔 TiO2 基质能够通过连续两步沉积帮助 PbI2 晶体转变为 CH3NH3PbI3。多孔 TiO2 电极中所得的 PbI2 晶体不会降低光伏效应。此外，还证实多孔TiO2电极具有防止钙钛矿太阳能电池中工作电极和对电极之间短路的功能。 (C) 2014 年作者。除非另有说明，所有文章内容均根据 Creative Commons Attribution 3.0 Unported License 获得许可。
In order to analyze the crystal transformation from hexagonal PbI2 to CH3NH3PbI3 by the sequential (two-step) deposition process, perovskite CH3NH3PbI3 layers were deposited on flat and/or porous TiO2 layers. Although the narrower pores using small nanoparticles prohibited the effective transformation, the porous-TiO2 matrix was able to help the crystal transformation of PbI2 to CH3NH3PbI3 by sequential two-step deposition. The resulting PbI2 crystals in porous TiO2 electrodes did not deteriorate the photovoltaic effects. Moreover, it is confirmed that the porous TiO2 electrode had served the function of prohibiting short circuits between working and counter electrodes in perovskite solar cells. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.