在金属化物矿中,缺陷的动态行为和非辐射重组之间的协同作用
Wencai Zhou1, Rongkun Zhou1, Xiaoqing Chen1
1College of Materials Science and Engineering, Faculty of Information Technology, Beijing University of Technology, Beijing, 100124, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|August 7, 2024
概括
矿太阳能电池 (PSC) 中的缺陷导致效率损失. 这项研究揭示了空位和间位物如何影响重组,以及离子被动化如何可以减轻这些缺陷以提高PSC性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 可再生能源可再生能源是可再生能源.
背景情况:
- 有机-无机混合矿太阳能电池 (PSC) 中的缺陷会产生深层陷状态.
- 这些陷状态显著增强非辐射重组,降低设备的效率.
- 基于甲基 (MA) 的PSC (MA-PSC) 比基于甲基 (FA) 的PSC (FA-PSC) 有更多的缺陷,导致效率较低 (23.6%对26.1%).
研究的目的:
- 调查MAPbI中空位 (VH-) 和间位 (Hi-) 缺陷的影响.
- 探索缺陷形成的机制,自我愈合和被动化策略.
- 为高性能PSC制造提供有关减轻缺陷的见解.
主要方法:
- 密度函数理论 (DFT) 的计算,以模拟MAPbI3批量和表面的缺陷行为.
- 对充电载体寿命中缺陷引起的变化的分析.
- 对VH-和Hi-缺陷的离子被动效应的研究.
主要成果:
- 大量VH-缺陷显著降低载体寿命 (从67毫秒到8毫秒),取决于MA0粘合.
- 表面H缺陷通过MA0和Pb2+的化学结合表现出自我被动.
- 酸离子被动化有效地减轻了VH- (喜欢大离子) 和Hi- (喜欢小离子) 缺陷.
结论:
- 缺陷是限制PSC性能的关键因素.
- 使用酸的双被动化策略解决了不同的实验结果,并提高了PSC的性能.
- 了解和减轻缺陷对于制造高效和稳定的PSC至关重要.
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