钝化
材料科学
甲脒
钙钛矿(结构)
三元运算
空位缺陷
卤化物
离子键合
纳米技术
化学物理
化学工程
光电子学
无机化学
离子
结晶学
图层(电子)
有机化学
化学
工程类
程序设计语言
计算机科学
作者
Wenhao Zhao,Pengfei Guo,Jie Su,Zhiyu Fang,Ning Jia,Chen Liu,Linfeng Ye,Qian Ye,Jingjing Chang,Hongqiang Wang
标识
DOI:10.1002/adfm.202200534
摘要
Abstract The ionic nature endows halide perovskites with intrinsic interfacial defects in the formed polycrystalline films, thus imposing the challenge of synchronously passivating these defects with low formation energies that directly account for the unsatisfied performance of perovskite solar cells (PSCs). By virtue of the theoretically proven capability of a three to four times enhancement of the formation energy of each defect of Pb‐I antisite (Pb I ) and iodine vacancy (V I ), a new passivation molecule of 1,10‐phenanthrolin‐5‐amine (PAA) is intentionally explored to synchronously passivate the dual defects. The pronounced passivation effect is experimentally verified by the sharp enhancement of the open‐circuit voltage in ternary PSCs from the original 1.118 up to 1.207 V, as well as the construction of PAA‐modified formamidinium lead iodide PSCs with a champion efficiency up to 24.06%, thus providing a universal alternative of addressing interfacial charge carrier dynamics and operational stability of PSCs that are bothered by the multiple interfacial defects.
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