结晶度
结晶
材料科学
成核
钙钛矿(结构)
化学工程
Crystal(编程语言)
旋涂
晶界
相(物质)
能量转换效率
粒度
晶体生长
聚合物结晶
太阳能电池
涂层
纳米技术
光电子学
结晶学
复合材料
化学
微观结构
有机化学
计算机科学
程序设计语言
工程类
作者
Yulong Zhang,Zhaoyi Jiang,Jincheng Li,Guanxiong Meng,Jiajun Guo,Weijia Zhang
出处
期刊:Coatings
[Multidisciplinary Digital Publishing Institute]
日期:2024-07-22
卷期号:14 (7): 918-918
被引量:1
标识
DOI:10.3390/coatings14070918
摘要
All-inorganic CsPbBr3 perovskite solar cells have garnered extensive attention in the photovoltaic domain due to their remarkable environmental stability. Nevertheless, CsPbBr3 prepared using the conventional sequential deposition method suffers from issues such as inferior crystallinity, low phase purity, and poor film morphology. Herein, we propose a pre-crystallization methodology by introducing a minute quantity of CsBr into the PbBr2 precursor solution to generate a small amount of CsPb2Br5 crystals within the PbBr2 film, leading to a porous PbBr2 film with enhanced crystallinity. Under the influence of more pores and CsPb2Br5 crystals as nucleation sites for inducing growth, a CsPbBr3 film with a larger crystal size, lower grain boundary density, stronger crystallinity, and higher phase purity is formed. Compared with untreated devices, photovoltaic devices prepared using the pre-crystallization method achieved a champion photovoltaic conversion efficiency (PCE) of 8.62%. Furthermore, pre-crystallized devices demonstrate higher stability than untreated ones and can still retain 94% of the original PCE after being exposed to air for 1000 h without encapsulating.
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