材料科学
钙钛矿(结构)
串联
三联结
光电子学
能量转换效率
卤化物
带隙
光伏系统
光伏
兴奋剂
钙钛矿太阳能电池
化学工程
无机化学
电气工程
复合材料
化学
工程类
作者
Faming Li,Dan Wu,Lianguang Shang,Rui Xia,Hengrui Zhang,Zhengxin Huang,Jue Gong,Lin Mao,Hao Zhang,Yinqing Sun,Tian Yang,Xianggang Sun,Zhiqiang Feng,Mingzhen Liu
标识
DOI:10.1002/adma.202311595
摘要
Wide-bandgap metal halide perovskites have demonstrated promise in multijunction photovoltaic (PV) cells. However, photoinduced phase segregation and the resultant low open-circuit voltage (Voc ) have greatly limited the PV performance of perovskite-based multijunction devices. Here, a alloying strategy is reported to achieve uniform distribution of triple cations and halides in wide-bandgap perovskites by doping Rb+ and Cl- with small ionic radii, which effectively suppresses halide phase segregation while promoting the homogenization of surface potential. Based on this strategy, a Voc of 1.33 V is obtained from single-junction perovskite solar cells, and a VOC approaching 3.0 V and a power conversion efficiency of 25.0% (obtained from reverse scan direction, certified efficiency: 24.19%) on an 1.04 cm2 photoactive area can be achieved in a perovskite/perovskite/c-Si triple-junction tandem cell, where the certification efficiency is by far the greatest performance of perovskite-based triple-junction tandem solar cells. This work overcomes the performance deadlock of perovskite-based triple-junction tandem cells by setting a materials-by-design paradigm.
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