Effects of Br Substitution on Inorganic Rudorffite AgBiI4 for Stable, Pb-Free Solar Cells

被引：9

作者：

Jeon, Byeong-Cheol ^{[1
]}

Kim, Jinhyun ^{[2
]}

Moon, Taeho ^{[1
]}

机构：

[1] Dankook Univ, Dept Mat Sci & Engn, Cheonan 31116, South Korea

[2] Kwangwoon Univ, Dept Chem, Seoul 01897, South Korea

来源：

CHEMISTRYSELECT | 2024年 / 9卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

AgBiI4; Rudorffite; Br Substitution; Stability; Pb-Free Solar Cells; SILVER BISMUTH IODIDE; AG2BII5; HALIDES; FILMS;

D O I：

10.1002/slct.202400337

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Despite the rapid development of Pb-based perovskites, the presence of toxic Pb and insufficient stability remain discouraging factors for the commercialization of perovskite solar cells. Therefore, research on Pb-free absorbers exhibiting long-term stability is required. Herein, AgBi(I1-xBrx)(4) thin films having a hexagonal rudorffite structure were fabricated using a solution process in ambient atmosphere for cost-effective and environmentally benign photovoltaics. Br substitution increases the grain size and results in a pinhole-free morphology. Furthermore, photoluminescence analyses confirm that Br substitution reduces the trap-state density. Consequently, device efficiency is enhanced through Br substitution. Importantly, Br substitution results in considerably improved device stability, with devices maintaining 80 % of their initial efficiency for 26 days in ambient atmosphere without encapsulation.

引用

页数：6