Unveiling the additive-assisted oriented growth of perovskite crystallite for high performance light-emitting diodes

被引：291

作者：

Zhu, Lin ^{[1
,2
]}

Cao, Hui ^{[1
,2
]}

Xue, Chen ^{[3
]}

Zhang, Hao ^{[1
,2
]}

Qin, Minchao ^{[4
]}

Wang, Jie ^{[1
,2
]}

Wen, Kaichuan ^{[1
,2
]}

Fu, Zewu ^{[1
,2
]}

Jiang, Tao ^{[1
,2
]}

Xu, Lei ^{[1
,2
]}

Zhang, Ya ^{[1
,2
]}

Cao, Yu ^{[1
,2
,3
]}

Tu, Cailing ^{[1
,2
]}

Zhang, Ju ^{[1
,2
]}

Liu, Dawei ^{[1
,2
]}

Zhang, Guangbin ^{[1
,2
]}

Kong, Decheng ^{[1
,2
]}

Fan, Ning ^{[1
,2
]}

Li, Gongqiang ^{[1
,2
]}

Yi, Chang ^{[1
,2
]}

Peng, Qiming ^{[1
,2
]}

Chang, Jin ^{[1
,2
]}

Lu, Xinhui ^{[4
]}

Wang, Nana ^{[1
,2
]}

Huang, Wei ^{[1
,2
,3
]}

Wang, Jianpu ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect KLOFE, Nanjing, Peoples R China

[2] Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, Nanjing, Peoples R China

[3] Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, Xian, Peoples R China

[4] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

中国国家自然科学基金;

关键词：

SOLAR-CELL; PHOTOLUMINESCENCE; ORIENTATION; PASSIVATION; EFFICIENT;

D O I：

10.1038/s41467-021-25407-8

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：

Solution-processed metal halide perovskites have been recognized as one of the most promising semiconductors, with applications in light-emitting diodes (LEDs), solar cells and lasers. Various additives have been widely used in perovskite precursor solutions, aiming to improve the formed perovskite film quality through passivating defects and controlling the crystallinity. The additive's role of defect passivation has been intensively investigated, while a deep understanding of how additives influence the crystallization process of perovskites is lacking. Here, we reveal a general additive-assisted crystal formation pathway for FAPbI(3) perovskite with vertical orientation, by tracking the chemical interaction in the precursor solution and crystallographic evolution during the film formation process. The resulting understanding motivates us to use a new additive with multi-functional groups, 2-(2-(2-Aminoethoxy)ethoxy)acetic acid, which can facilitate the orientated growth of perovskite and passivate defects, leading to perovskite layer with high crystallinity and low defect density and thereby record-high performance NIR perovskite LEDs (similar to 800 nm emission peak, a peak external quantum efficiency of 22.2% with enhanced stability).

引用

页数：8

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