An ammonium-pseudohalide ion pair for synergistic passivating surfaces in FAPbI3 perovskite solar cells

被引：57

作者：

Wang, Jungan ^{[1
,2
]}

Ma, Hongzhuang ^{[1
,2
]}

Wang, Aifei ^{[1
,2
]}

Li, Zihao ^{[1
,2
]}

Dong, Jingjin ^{[1
,2
]}

Liu, You ^{[1
,2
]}

Gao, Song ^{[1
,2
]}

Yan, Suhao ^{[1
,2
]}

Chen, Xianglin ^{[1
,2
]}

Li, Ya ^{[1
,2
]}

Wu, Zichao ^{[1
,2
]}

Xu, Wenxin ^{[1
,2
]}

Liu, Fang ^{[1
,2
]}

Wang, Fangfang ^{[1
,2
]}

Huang, Wei ^{[1
,2
]}

Qin, Tianshi ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Key Lab Flexible Elect KLOFE, Nanjing 211816, Jiangsu, Peoples R China

[2] Nanjing Tech Univ, Inst Adv Mat IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing 211816, Jiangsu, Peoples R China

来源：

MATTER | 2022年 / 5卷 / 07期

基金：

中国国家自然科学基金;

关键词：

METAL HALIDE PEROVSKITES; FORMAMIDINIUM; EFFICIENT; PERFORMANCE;

D O I：

10.1016/j.matt.2022.04.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Either cationic ammonium or anionic pseudohalide compounds can passivate partial defects in perovskite solar cells (PSCs); however, their ion-pairing combination has rarely been studied because of its rarity. We present an ion-pairing passivating agent, diethylammonium diethyldithiocarbamate, synchronously providing both cationic and anionic ions, which can convert the surfaces of lead halide perovskite into two types of water-resistant compositions by forming strong chemical bonds. These synergistic capping compositions also reduce the defect density in the surface and bulk domains by passivating defect-nucleating sites, which can modify the surface energy level toward boosted photovoltage to 1.122 V and efficiency to 23.21% for pure-phase FAPbI(3) PSCs. In addition, their water-resistant features can effectively prevent moisture damage into the perovskite layer and significantly elongate device stabilities.

引用

页码：2209 / 2224

页数：17

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