Stability Improvement of Tin-Based Halide Perovskite by Precursor-Solution Regulation with Dual-Functional Reagents

被引：57

作者：

Cao, Xiangrong ^{[1
,2
]}

Li, Jingrui ^{[3
,4
]}

Dong, Hua ^{[1
,2
,5
]}

Li, Peizhou ^{[1
,2
]}

Fan, Qinhua ^{[6
]}

Xu, Ruoyao ^{[1
,2
]}

Li, Haomiao ^{[1
,2
]}

Zhou, Guijiang ^{[7
]}

Wu, Zhaoxin ^{[1
,2
,5
]}

机构：

[1] Xi An Jiao Tong Univ, Key Lab Phys Elect & Devices, Minist Educ, Sch Elect Sci & Engn, 28 Xianning West Rd, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Shaanxi Key Lab Informat Photon Tech, Sch Elect Sci & Engn, 28 Xianning West Rd, Xian 710049, Peoples R China

[3] Xi An Jiao Tong Univ, Elect Mat Res Lab, Key Lab Minist Educ, Sch Elect Sci & Engn, 28 Xianning West Rd, Xian 710049, Peoples R China

[4] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Sch Elect Sci & Engn, 28 Xianning West Rd, Xian 710049, Peoples R China

[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

[6] Ningbo Exciton Innovat Mat Res Inst CO LTD, Block 6A,Yunsheng Ind Pk 428 Mingzhu Rd, Ningbo 315040, Peoples R China

[7] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, State Key Lab Mech Behav Mat, Dept Chem,Sch Sci, 28 Xianning West Rd, Xian 710049, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2021年 / 31卷 / 40期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

lead-free; perovskite solar cells; precursors; source-regulating defects; stability; SOLAR-CELLS; EFFICIENT; PERFORMANCE; DURABILITY; BANDGAP; IODIDE;

D O I：

10.1002/adfm.202104344

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Tin-based halide perovskites have attracted great attention in the perovskite solar cells (PSCs) community with their suitable band gaps, excellent optoelectronic properties, and non-toxicity. However, because of their poor chemical stability, it is challenging to fabricate highly stable and efficient tin PSCs (TPSCs). In this study, the origin of the Sn2+ oxidation ahead of film formation is concentrated on, and it is found that the ionization of SnI2 in precursor plays a decisive role. Accordingly, SnI2 dissociation and the subsequent Sn2+ oxidation can be restricted in precursor by employing reductive complexes as additives. This dual-functional source-regulating strategy effectively helps prepare high-quality perovskite films with low Sn4+ defect densities. As a result, the unencapsulated TPSCs show a considerable power-conversion efficiency of 10.03% (certified 9.38%) and maintain 90% of its initial efficiency after 1000 h of light aging testing.

引用

页数：9

共 51 条

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