材料科学
钙钛矿(结构)
结晶
带隙
结晶度
成核
能量转换效率
化学工程
Crystal(编程语言)
晶界
粒度
晶体生长
结晶学
光电子学
微观结构
化学
复合材料
有机化学
工程类
程序设计语言
计算机科学
作者
S. X. Du,Jing Yang,Shujie Qu,Zhineng Lan,Tao Sun,Yixin Dong,Ziya Shang,Dongxue Liu,Yingying Yang,Liang Yan,Xinxin Wang,Hao Huang,Jun Ji,Peng Cui,Yingfeng Li,Yingfeng Li
出处
期刊:Materials
[MDPI AG]
日期:2022-04-28
卷期号:15 (9): 3185-3185
被引量:10
摘要
High-crystalline-quality wide-bandgap metal halide perovskite materials that achieve superior performance in perovskite solar cells (PSCs) have been widely explored. Precursor concentration plays a crucial role in the wide-bandgap perovskite crystallization process. Herein, we investigated the influence of precursor concentration on the morphology, crystallinity, optical property, and defect density of perovskite materials and the photoelectric performance of solar cells. We found that the precursor concentration was the key factor for accurately controlling the nucleation and crystal growth process, which determines the crystallization of perovskite materials. The precursor concentration based on Cs0.05FA0.8MA0.15Pb(I0.84Br0.16)3 perovskite was controlled from 0.8 M to 2.3 M. The perovskite grains grow larger with the increase in concentration, while the grain boundary and bulk defect decrease. After regulation and optimization, the champion PSC with the 2.0 M precursor concentration exhibits a power conversion efficiency (PCE) of 21.13%. The management of precursor concentration provides an effective way for obtaining high-crystalline-quality wide-bandgap perovskite materials and high-performance PSCs.
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