钙钛矿(结构)
材料科学
晶界
光伏
半导体
钙钛矿太阳能电池
载流子
光电子学
碳纤维
电荷(物理)
俘获
太阳能电池
带隙
串联
混合太阳能电池
化学工程
光伏系统
聚合物太阳能电池
复合材料
电气工程
工程类
物理
复合数
微观结构
生物
量子力学
生态学
作者
Yantao Mei,Xiayao Lu,Chen Dong,Furui Tan,Minghuan Cui,Yuki Haruta,Vishal Yeddu,Mengyue Wang,Kong Liu,Gentian Yue,Yueyue Gao,Shengchun Qu,Chaochao Qin,Weifeng Zhang,Liming Ding,Makhsud I. Saidaminov,Zhijie Wang
标识
DOI:10.1021/acsami.2c11895
摘要
Carbon-based all-inorganic CsPbIxBr3-x perovskite solar cells offer high stability against heat and humidity and a suitable band gap for tandem and semitransparent photovoltaics. In CsPbIxBr3-x perovskite films, the defects at grain boundaries (GBs) cause charge trapping, reducing the efficiency of the cell. Electronic deactivation of GB has been a conventional strategy to suppress the trapping, but at the cost of charge carrier transport through the boundaries. Here, we turn the GBs into benign charge transport pathways with the aid of bipolar charge transport semiconductors, namely, Ti3C2TX (MXene) and Spiro-OMeTAD, respectively. Thanks to the synergistic effects of both n- and p-type transport media, the charge transport is improved and balanced at the GBs. As a result, the cells achieve an efficiency of 12.7%, the highest among all low-temperature-processed carbon-based inorganic perovskite solar cells. Benign GBs also lead to enhanced light and aging stabilities. Our work demonstrates a proof-of-concept strategy of benign electronic modulation of GBs for solution-processed perovskite solar cells.
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