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高效率和热稳定的FACsPbI

Saisai Li¹, Yuanzhi Jiang¹, Jian Xu^2,3

¹State Key Laboratory of Advanced Chemical Power Sources, Frontiers Science Center for New Organic Matter, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, P. R. China.

|September 30, 2024

概括

这项研究引入了一种新方法,用于制造稳定的矿太阳能电池 (PSC),使用无挥发性添加剂的化 (α-FA_1-xCs_xPbI₃). 新的PSC实现了高效率,并在恶劣条件下表现出卓越的运行稳定性.

科学领域:

材料科学
可再生能源
太阳能发电

背景情况:

酸 (α-FA_1-xCs_xPbI₃) 是高效矿太阳能电池 (PSC) 的一个关键材料.
目前的高效PSC通常依赖于甲基化物,由于挥发性残留物导致稳定性问题.
之前没有这种添加剂的α-FA_1-xCs_xPbI₃PSC的效率较低 (约24%) 并缺乏稳定性优势.

研究的目的:

解决α-FA_1-xCs_xPbI₃PSC中的甲基化物的局限性.
识别和克服常规α-FA_1-xCs_xPbI₃PSC中的性能和稳定性降低的原因.
开发一种高质量的α-FA_1-xCs_xPbI₃膜的制造方法,没有挥发性添加剂,提高效率和稳定性.

主要方法:

在α-FA_1-xCs_xPbI₃PSC中归因于研究的界面接触损失.
在现场使用宽角X射线散射 (GIWAXS) 分析.
使用密度函数理论 (DFT) 计算来了解结晶路径.
通过乙表面协调开发了一种中期辅助结晶策略.

主要成果:

鉴定并减轻因Cs+积累而导致的界面接触损失.
使用中相辅助结晶路径制造高质量的α-FA_1-xCs_xPbI₃膜.
获得了25.94%的稳定功率转换效率和26.64%的反向扫描效率.
在1个太阳,85°C和60%的相对湿度下保持超过95%的初始PCE.

结论:

乙表面协调使中相辅助结晶路径能够形成高级α-FA_1-xCs_xPbI₃膜.
开发的方法成功地消除了对甲基的需求,解决了稳定性问题.
由此产生的PSC表现出创纪录的效率和特殊的长期运营稳定性,为商业化铺平了道路.

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