钝化
材料科学
钙钛矿(结构)
能量转换效率
卤化物
阳离子聚合
串联
带隙
光电子学
化学工程
纳米技术
图层(电子)
无机化学
高分子化学
复合材料
化学
工程类
作者
Ke Ma,Harindi R. Atapattu,Qiuchen Zhao,Yao Gao,Blake P. Finkenauer,Kang Wang,Ke Chen,Somin Park,Aidan H. Coffey,Chenhui Zhu,Libai Huang,Kenneth R. Graham,Jianguo Mei,Letian Dou
标识
DOI:10.1002/adma.202100791
摘要
Abstract Surface passivation is an effective way to boost the efficiency and stability of perovskite solar cells (PSCs). However, a key challenge faced by most of the passivation strategies is reducing the interface charge recombination without imposing energy barriers to charge extraction. Here, a novel multifunctional semiconducting organic ammonium cationic interface modifier inserted between the light‐harvesting perovskite film and the hole‐transporting layer is reported. It is shown that the conjugated cations can directly extract holes from perovskite efficiently, and simultaneously reduce interface non‐radiative recombination. Together with improved energy level alignment and the stabilized interface in the device, a triple‐cation mixed‐halide medium‐bandgap PSC with an excellent power conversion efficiency of 22.06% (improved from 19.94%) and suppressed ion migration and halide phase segregation, which lead to a long‐term operational stability, is demonstrated. This strategy provides a new practical method of interface engineering in PSCs toward improved efficiency and stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI