Structurally Reinforced All-Inorganic CsPbI2Br Perovskite by Nonionic Polymer via Coordination and Hydrogen Bonds

被引：39

作者：

Peng, Huirong ^{[1
]}

Cai, Molang ^{[1
,2
]}

Zhou, Jiyu ^{[3
]}

Yang, Yi ^{[1
]}

Ding, Xihong ^{[1
]}

Tao, Ye ^{[1
]}

Wu, Gao ^{[1
]}

Liu, Xuepeng ^{[1
]}

Pan, Jia Hong ^{[4
]}

Dai, Songyuan ^{[1
,2
]}

机构：

[1] North China Elect Power Univ, Beijing Key Lab Novel Thin Film Solar Cells, Beijing 102206, Peoples R China

[2] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

[3] North China Elect Power Univ, Sch Energy Power & Mech Engn, Baoding 071003, Peoples R China

[4] North China Elect Power Univ, Coll Environm Sci & Engn, Key Lab Resources & Environm Syst Optimizat, MOE, Beijing 102206, Peoples R China

来源：

SOLAR RRL | 2020年 / 4卷 / 09期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

all-inorganic perovskites; coordination; humidity stability; hydrogen bonds; polyethyleneimine; SOLAR-CELLS; HALIDE PEROVSKITES; HIGHLY EFFICIENT; PERFORMANCE; DEPOSITION; STABILITY; FILMS;

D O I：

10.1002/solr.202000216

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The all-inorganic CsPbI2Br perovskite with superior thermal durability faces challenges of low-phase stability and high moisture sensitivity. Herein, a nonionic additive of polyethyleneimine (PEI) with multiple amino groups is introduced to form hydrogen bond with I-/Br(-)ions and coordinate with Pb2+/Cs(+)ions simultaneously. The strong interplay between PEI and CsPbI2Br achieves a well-controlled grain size, reduced defects, and reinforced phase structure of CsPbI2Br film, which boosts the power conversion efficiency (PCE) of perovskite solar cells to 15.48%. The hydrophobic long alkyl chain of PEI greatly improves the humidity resistance, retaining 81.9% of initial PCE of zjr unsealed device under 20 +/- 5% relative humidity (RH) for 500 h. Remarkably, a PCE of 13.37% is achieved by the device based on CsPbI2Br-PEI film processed under ambient condition (approximate to 22% RH, approximate to 25 degrees C).

引用

页数：7

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