材料科学
串联
甲脒
钙钛矿(结构)
卤化物
带隙
光电子学
能量转换效率
钝化
退火(玻璃)
纳米技术
化学工程
图层(电子)
无机化学
化学
冶金
复合材料
工程类
作者
Hongling Guan,Wenjun Zhang,Jiwei Liang,Chen Wang,Xuzhi Hu,Dexing Pu,Lishuai Huang,Yansong Ge,Hongsheng Cui,Yuanrong Zou,Guojia Fang,Weijun Ke
标识
DOI:10.1002/adfm.202300860
摘要
Abstract Wide‐bandgap (WBG) perovskite solar cells (PSCs) have garnered significant attention for their potential applications in tandem solar cells. However, their large open‐circuit voltage ( V OC ) deficit and serious photo‐induced halide segregation remain the main challenges that impede their applications. Herein, a post‐treatment strategy without thermal annealing is presented to form a 2D top layer of 2‐thiopheneethylammonium lead halide ( n = 1) on WBG perovskites. This thermal annealing‐free post‐treatment method can more effectively passivate the defects of WBG methylamine (MA)‐free formamidinium/cesium lead iodide/bromide perovskite films and suppress photo‐induced perovskite phase segregation, as compared with the thermal annealing method that yields multi‐2D phases. The resulting opaque and semi‐transparent 1.66 eV‐bandgap perovskite solar cells deliver maximum power conversion efficiencies of 21.47% (a small V OC deficit of 0.43 V) and 19.11%, respectively, both of which are among the highest reports for inverted MA‐free WBG PSCs. Consequently, four‐terminal all‐perovskite tandem cells realize a remarkable efficiency of 26.64%, showing great promise for their applications in efficient multi‐junction tandem solar cells.
科研通智能强力驱动
Strongly Powered by AbleSci AI