材料科学
结晶度
钙钛矿(结构)
开路电压
能量转换效率
醋酸铅
带隙
氯化铅
光伏系统
光电子学
化学工程
氯化物
电压
有机化学
电气工程
复合材料
化学
冶金
毒性
工程类
作者
Jie Zhao,Anthony S. R. Chesman,Junlin Yan,Luke J. Sutherland,Jacek J. Jasieniak,Jianfeng Lu,Wenxin Mao,Udo Bach
标识
DOI:10.1021/acsami.2c22179
摘要
Wide-bandgap (WBG) perovskites have great potential for inclusion in efficient tandem solar cells, but large open-circuit voltage losses have limited device performance to date. Here, we show that a high-quality WBG perovskite, FA0.83Cs0.17Pb(I0.8Br0.2)3, with enlarged grain sizes and improved crystallinity can be achieved by incorporating lead chloride (PbCl2) into a lead acetate (PbAc2)-based precursor. The improved film quality resulted in the suppression of nonradiative recombination and a reduction in defect density. Efficient WBG perovskite solar cells (1.66 eV) with an efficiency of 19.3% and a high Voc of 1.22 V were fabricated using a facile one-step spin-coating method without the need for an antisolvent. Notably, the unencapsulated devices retained 90% of their initial power conversion efficiency after storage in a dry box (10% humidity) for 800 h.
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