Ultrastable near-infrared perovskite light-emitting diodes

被引：241

作者：

Guo, Bingbing ^{[1
]}

Lai, Runchen ^{[1
]}

Jiang, Sijie ^{[2
,3
]}

Zhou, Linming ^{[4
]}

Ren, Zhixiang ^{[1
]}

Lian, Yaxiao ^{[1
]}

Li, Puyang ^{[2
,3
]}

Cao, Xuhui ^{[1
]}

Xing, Shiyu ^{[1
]}

Wang, Yaxin ^{[1
]}

Li, Weiwei ^{[5
,6
]}

Zou, Chen ^{[1
]}

Chen, Mengyu ^{[2
,3
]}

Hong, Zijian ^{[4
]}

Li, Cheng ^{[2
,3
]}

Zhao, Baodan ^{[1
]}

Di, Dawei ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Int Res Ctr Adv Photon, Hangzhou, Peoples R China

[2] Xiamen Univ, Sch Elect Sci & Engn, Xiamen, Peoples R China

[3] Future Display Inst Xiamen, Xiamen, Peoples R China

[4] Zhejiang Univ, Sch Mat Sci & Engn, Lab Dielect Mat, Hangzhou, Peoples R China

[5] Nanjing Univ Aeronaut & Astronaut, Coll Phys, MIIT Key Lab Aerosp Informat Mat & Phys, Nanjing, Peoples R China

[6] Univ Cambridge, Dept Mat Sci & Met, Cambridge, England

来源：

NATURE PHOTONICS | 2022年 / 16卷 / 09期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

QUANTUM DOTS; SOLAR-CELLS; EFFICIENCY; NANOCRYSTALS; STABILITY; PERFORMANCE; BLUE;

D O I：

10.1038/s41566-022-01046-3

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Perovskite light-emitting diodes are an emerging light source technology. However, similar to perovskite solar cells, poor operational stability remains an obstacle for commercial applications. Here we demonstrate ultrastable and efficient near-infrared (similar to 800 nm) perovskite light-emitting diodes with record-long operational lifetimes (T-50 extrapolated) of 11,539 h (similar to 1.3 years) and 32,675 h (similar to 3.7 years) for initial radiance (or current densities) of 3.7 W sr(-1) m(-2) (similar to 5.0 mA cm(-2)) and 2.1W sr(-1) m(-2) (similar to 3.2 mA cm(-2)), respectively, with even longer lifetimes forecasted for lower radiance. Key to this stability is the introduction of a dipolar molecular stabilizer, which interacts with the cations and anions at the perovskite grain boundaries. This suppresses ion migration under electric fields, preventing the formation of lead iodide, which mediates the phase transformation and decomposition of alpha-FAPbI(3) perovskite. These results remove the critical concern that halide perovskite devices may be intrinsically unstable, paving the path towards industrial applications.

引用

页码：637 / +

页数：19

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