材料科学
钙钛矿(结构)
钝化
兴奋剂
结晶
退火(玻璃)
晶界
热稳定性
化学工程
相(物质)
光电子学
化学
纳米技术
微观结构
复合材料
工程类
有机化学
图层(电子)
作者
Luting Yu,Jing Zhang,Haobo Yuan,Hongwen Sun,Xueping Gan,Ziyang Hu,Yuejin Zhu
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2019-12-13
卷期号:3 (1): 1076-1081
被引量:13
标识
DOI:10.1021/acsaem.9b02102
摘要
Inorganic cesium-based perovskite is an alternative material of organic–inorganic perovskite because of its high thermal stability. However, the phase instability and the high annealing temperature to form α-phase hinder its further development. Herein, this work successfully achieves the reduction of α-phase formation temperature from 350 to 150 °C and achieves high-performance CsPbI2Br-based perovskite solar cells via doping CH3COOCs (CsAc) at optimum concentration. The CsAc-doped CsPbI2Br film fabricated at low temperature of 150 °C exhibits good crystallization and a pinhole-free surface. The function of phase stability by doping CsAc is the grain boundary passivation to decrease defect states and enhance the charge transport. The PSC based on CsAc-doped CsPbI2Br using a planar structure achieves an efficiency of 10.53%, which is three times higher than that of undoped CsPbI2Br fabricated at 150 °C. More importantly, the pure α-phase with CsAc-doped film shows long time stability. This work highlights an available method to prepare high-performance and phase-stable perovskite solar cells at low temperature.
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