高等学校化学学报2016，Vol.37Issue(9)：1605-1610,6.DOI:10.7503/cjcu20160179
利用原位红外光谱研究钙钛矿复合半导体CH3 NH3 PbI3的稳定性
Investigation on Stability of Perovskite Semiconductor CH3 NH3 PbI3 by In-situ FTIR Spectroscopy
摘要
Abstract
Perovskite hybrid semiconductors CH3NH3PbX3(X=Cl, Br, I) have attracted much interests of the chemists and material scientists due to their advantages including facile preparation, low cost and excellent optoelectronic properties. However, the poor stability of these hybrid semiconductors severely frustrated their practical applications, thus it is very important to investigate their decomposition process and explore the new route to improve their stability. Here we investigated the thermal decomposition process of CH3 NH3 PbI3 using an in-situ Fourier transformation infrared( FTIR) spectrometer. It was found that the stability of CH3 NH3 PbI3 was rather sensitive to the existence of oxygen, it began to decompose at 150 ℃ when 1%( volume fraction) oxygen was introduced into the nitrogen atmosphere. In comparison, its decomposition temperature strikingly increased to 250 ℃ when it was heated in pure nitrogen of atmospheric pressure. It was rather surprising that the decomposition temperature of CH3 NH3 PbI3 further increased to 270 ℃ when the pressure of nitrogen in-creased to 4. 0 MPa. This phenomenon reveals that the thermal stability of CH3 NH3 PbX3 should be greatly im-proved by applying an even high pressure, thus the post-treatment of photovoltaic devices could be performed at much higher temperature and even better performance can be anticipated.关键词
钙钛矿/复合半导体/稳定性/原位红外光谱Key words
Perovskite/Hybrid semiconductor/Stability/In-situ Fourier transformation infrared spectroscopy分类
化学化工引用本文复制引用
刘阳,付现伟,赵天宇,廉刚,董宁,宋思德,王琪珑,崔得良..利用原位红外光谱研究钙钛矿复合半导体CH3 NH3 PbI3的稳定性[J].高等学校化学学报,2016,37(9):1605-1610,6.基金项目
国家自然科学基金(批准号:51102151,51372143)资助. Supported by the National Natural Science Foundation of China(Nos.51102151,51372143) （批准号:51102151,51372143）
