Inhibiting perovskite decomposition by a creeper-inspired strategy enables efficient and stable perovskite solar cells

被引：35

作者：

Du, Shuxian ^{[1
]}

Huang, Hao ^{[1
]}

Lan, Zhineng ^{[1
]}

Cui, Peng ^{[1
]}

Li, Liang ^{[1
]}

Wang, Min ^{[1
]}

Qu, Shujie ^{[1
]}

Yan, Luyao ^{[1
]}

Sun, Changxu ^{[1
]}

Yang, Yingying ^{[1
]}

Wang, Xinxin ^{[1
]}

Li, Meicheng ^{[1
]}

机构：

[1] North China Elect Power Univ, Sch Renewable Energy, State Key Lab Alternate Elect Power Syst Renewable, Beijing 102206, Peoples R China

来源：

NATURE COMMUNICATIONS | 2024年 / 15卷 / 01期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

LEAD;

D O I：

10.1038/s41467-024-49617-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The commercialization of perovskite solar cells is badly limited by stability, an issue determined mainly by perovskite. Herein, inspired by a natural creeper that can cover the walls through suckers, we adopt poly-hexamethyleneguanidine hydrochloride as a molecular creeper on perovskite to inhibit its decomposition starting from the annealing process. The molecule possesses a long-line molecular structure where the guanidinium groups can serve as suckers that strongly anchor cations through multiple hydrogen bonds. These features make the molecular creeper can cover perovskite grains and inhibit perovskite decomposition by suppressing cations' escape. The resulting planar perovskite solar cells achieve an efficiency of 25.42% (certificated 25.36%). Moreover, the perovskite film and device exhibit enhanced stability even under harsh damp-heat conditions. The devices can maintain >96% of their initial efficiency after 1300 hours of operation under 1-sun illumination and 1000 hours of storage under 85% RH, respectively.

引用

页数：11

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