新型添加剂改善全无机钙钛矿太阳能电池稳定性

Enhanced the stability of allinorganic perovskite solar cells based on a novel additive

摘要:

目前，全无机钙钛矿太阳能电池CsPbI2Br的光电转换效率已经超过了16%，表现出较强的应用前景，然而全无机钙钛矿较差的水氧稳定性问题严重制约其商业化发展．因此，针对上述水氧稳定性问题，提出加入一种9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物（DOPO）添加剂来提高钙钛矿CsPbI2Br的稳定性．结果显示，经过DOPO修饰的器件达到了11.04%的光电转换效率，并且稳定性明显提升，在10天后维持87 %的初始效率，而参比器件仅具有初始效率的80 %．

Abstract:

At present, the photoelectric conversion efficiency (PCE) of the all-inorganic perovskite solar cell CsPbI2Br has exceeded 16 %, showing a strong application prospect. However, the poor water and oxygen stability of all-inorganic perovskite seriously restricts its commercial development. Therefore, it is proposed to add a 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide（DOPO) additive to improve the stability of perovskite CsPbI2Br. The results show that the modified perovskite solar cells achieves a PCE of 11.04 %, and the stability is significantly improved, maintaining an initial efficiency of 87 % after 10 days storage, while the reference device only has 80 % of the initial efficiency.