人工晶体学报2025，Vol.54Issue(5)：873-881,9.DOI:10.16553/j.cnki.issn1000-985x.2025.0008
钙钛矿太阳电池中的脒基小分子界面修饰策略
Amidine Small-Molecule Interfacial Modification Strategy in Perovskite Solar Cells
摘要
Abstract
To passivate defects in perovskite and enhance perovskite flims quality,a novel small molecule,2-amidinoethylenediamine dihydrobromide(2AD),was designed for interfacial modification of mixed-cation mixed-halide perovskite((FA0.90MA0.05Cs0.05)Pb(I0.96Br0.04)3)flims with a bandgap of 1.55 eV.The inverted perovskite solar cells(PSCs)were fabricated via an anti-solvent method using chlorobenzene,followed by systematic analysis of phase composition,optoelectronic properties,and device performance.Experimental results demonstrate the multifunctional effectiveness of 2AD in three key aspects:1)the grain size of perovskite films increases from 304 nm to 321 nm,accompanied by reduces surface roughness from 16.6 nm to 15.8 nm,and enhances hydrophobicity contact angle from 70.1° to 74.3°,the hydrophobicity increases;2)the photogenerated carrier lifetime is significantly prolonged,effectively suppressing non-radiative recombination and facilitating charge transfer;3)unencapsulated devices retains over 90%of their initial power conversion efficiency after 30 d exposure to ambient atmosphere.Finally,the efficiency of the perovskite device increases from 21.32%to 23.49%,and the hysteresis factor significantly reduces.关键词
钙钛矿/太阳电池/界面修饰/缺陷钝化/稳定性Key words
perovskite/solar cells/interface modification/defect passivation/stability分类
信息技术与安全科学引用本文复制引用
王智超,叶林峰,阮妙,杨超,加雪峰,倪玉凤,郭永刚,高鹏..钙钛矿太阳电池中的脒基小分子界面修饰策略[J].人工晶体学报,2025,54(5):873-881,9.基金项目
钙钛矿/晶硅叠层电池关键技术研究(2023-GX-149) （2023-GX-149）
