材料科学
钙钛矿(结构)
结晶度
光电子学
能量转换效率
纳米技术
图层(电子)
化学工程
电子迁移率
结晶
光伏系统
光伏
复合材料
电气工程
工程类
作者
Yulan Huang,Tanghao Liu,Bingzhe Wang,Jielei Li,Dongyang Li,Guoliang Wang,Qing Lian,Abbas Amini,Shi Chen,Chun Cheng,Guichuan Xing
标识
DOI:10.1002/adma.202102816
摘要
Abstract With potential commercial applications, inverted perovskite solar cells (PSCs) have received wide‐spread attentions as they are compatible with tandem devices and processed at low‐temperature. Nevertheless, their efficiencies remain unsatisfactory due to insufficient film quality on hydrophobic hole transport layer and limited hole‐blocking capability of the electron transport layer. Herein, 1,3,5‐Tris(1‐phenyl‐1H‐benzimidazol‐2‐yl)benzene (TPBi), an n‐type semiconductor, is incorporated into the antisolvent to simultaneously regulate the grain growth and charge transport of perovskite films. TPBi facilitates the crystallization of perovskites along (100) orientation. Besides, TPBi is mainly distributed near the top surface of perovskite film and enhances the hole‐blocking capability of the area adjacent to the surface. The superior properties of this film lead to a remarkable improvement in the open‐circuit voltage of inverted PSCs. The champion device achieves a high power conversion efficiency of 21.79% while keeping ≈92% of its initial value after 1000 h storage in the ambient atmosphere. This work provides an effective way to evidently promote the performance of inverted PSCs and illustrates its underlaying mechanism.
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