期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 122, 期 25, 页码 13758-13766出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.8b00602
关键词
-
资金
- Department of Science and Technology, Government of India
- CSIR
- UGC, India
- Jamsetji Tata Trust
Dielectric measurements on formamidinium lead halide perovskites, FAPbCl(3) and FAPbBr(3), compared to those of MAPbCl(3) and previously reported MAPbBr(3), reveal the strongly suppressed temperature dependence of dielectric constants in FA compounds in the temperature range of approximately 140-300 K. Although the behavior of dielectric constants of FA compounds for temperatures <140 K resembles that of the MAPbX(3) system, the absence of any strong temperature dependence in sharp contrast to MA analogues in the higher temperature range up to room temperature suggests that the formamidinium (FA) dipoles are in a deep-frozen glassy state unlike the MA dipoles that rotate nearly freely in the temperature range relevant for any photovoltaic application. This observation is further supported by the temperature-dependent single-crystal X-ray diffraction (XRD) results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据