钝化
晶界
材料科学
钙钛矿(结构)
微晶
光伏系统
偶极子
化学工程
纳米技术
复合材料
冶金
电气工程
有机化学
图层(电子)
工程类
微观结构
化学
作者
Chunyan Deng,Lina Tan,Jihuai Wu,Yuqian Yang,Yitian Du,Qi Chen,Xia Chen,Liuxue Sun,Fu‐Da Yu,Weihai Sun,Peng Gao,Jihuai Wu
标识
DOI:10.1002/aenm.202303387
摘要
Abstract The efficiency of perovskite solar cells (PSCs) is hindered by substantial defects within the grain boundaries (GBs) of polycrystalline perovskite films. Conventional post‐treatment strategies struggle to precisely repair these defects at GBs. Here, a targeted grain boundary passivation strategy through solvent effects by incorporating symmetrical biphenyl molecules is proposed, 4,4′‐diaminodiphenyl sulfone (DDS) and 4,4′‐sulfodiphenol (SDP), aiming to mitigate defects at GBs and optimize energy level arrangements through their electric dipole effects. Compared to the pristine device, the SDP‐modified device exhibits significant improvements, including a champion efficiency of 24.39% and an impressive fill factor, along with excellent operation stability. This work provides an effective and straightforward solution for improving the performance of PSCs.
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