21.41%-Efficiency CsPbI3 Perovskite Solar Cells Enabled by an Effective Redox Strategy with 4-Fluorobenzothiohydrazide in Precursor Solution

被引：30

作者：

Duan, Yuwei ^{[1
,2
]}

Wang, Jungang ^{[1
]}

Xu, Dongfang ^{[1
]}

Ji, Peigen ^{[1
]}

Zhou, Hui ^{[1
]}

Li, Yong ^{[1
]}

Yang, Shaoming ^{[1
]}

Xie, Zhuang ^{[1
,2
]}

Hai, Xiaohu ^{[1
]}

Lei, Xuruo ^{[1
]}

Sun, Rui ^{[1
]}

Fan, Zihao ^{[1
]}

Zhang, Ke ^{[1
]}

Liu, Shengzhong ^{[1
,3
]}

Liu, Zhike ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Shaanxi Engn Lab Adv Energy Technol Sch Mat Sci &, Key Lab Appl Surface & Colloid Chem, Shaanxi Key Lab Adv Energy Devices,Minist Educ,Sch, Xian 710119, Peoples R China

[2] Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu 610059, Peoples R China

[3] Chinese Acad Sci, Dalian Natl Lab Clean Energy iChEM, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2024年 / 34卷 / 10期

基金：

中国国家自然科学基金;

关键词：

4-fluorobenzothiohydrazide; cesium lead triiodide; high efficiency; perovskite solar cells; redox strategy;

D O I：

10.1002/adfm.202312638

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To simultaneously stabilize cesium lead triiodide (CsPbI3) precursor solution and passivate the defects in CsPbI3 film is greatly significant for achieving highly stable and efficient CsPbI3 perovskite solar cells (PSCs). Herein, an effective redox 4-fluorobenzothiohydrazide (FBTH) is developed to stabilize the precursor solution and passivate iodine/lead-related defects for high-quality CsPbI3 film. The comprehensive research confirms that 1) a new compound FBTH-I is obtained from an effective redox interaction between FBTH and molecular iodine (I-2) in perovskite precursor solution, which can effectively impede the formation of I-2 molecule and restrain I- migration in perovskite film by forming N-H<middle dot><middle dot><middle dot>I bond; 2) FBTH-I can also passivate Pb-related defects via forming S<middle dot><middle dot><middle dot>Pb interaction. Consequently, the CsPbI3 PSC based on FBTH-treated precursor solution exhibits a fascinating power conversion efficiency (PCE) of 21.41%, which is one of the highest PCE values among the reported pure CsPbI3 PSCs so far, and an outstanding stability against the harsh conditions, such as thermal annealing and continuous light-illumination.

引用

页数：10

共 51 条

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