Highly Stable Bulk Perovskite for Blue LEDs with Anion-Exchange Method

被引：55

作者：

Yoon, Yung Jin ^{[1
]}

Shin, Yun Seop ^{[1
]}

Jang, Hyungsu ^{[1
]}

Son, Jung Geon ^{[1
]}

Kim, Jae Won ^{[1
]}

Park, Chan Beom ^{[1
]}

Yuk, Dohun ^{[1
]}

Seo, Jongdeuk ^{[1
]}

Kim, Gi-Hwan ^{[2
]}

Kim, Jin Young ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol UNIST, Perovtron Res Ctr, Dept Energy Engn, Ulsan 44919, South Korea

[2] Gyeongsang Natl Univ, Sch Mat Sci & Engn, Jinju 52828, South Korea

来源：

NANO LETTERS | 2021年 / 21卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

perovskites; anion exchange; light-emitting diodes; post-treatment; blue emission; LIGHT-EMITTING-DIODES; MIXED-HALIDE PEROVSKITES; SOLAR-CELLS; NANOCRYSTALS; EFFICIENCY; SEGREGATION; LUMINESCENCE;

D O I：

10.1021/acs.nanolett.1c00124

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To date, the light emitting diode (LED) based halide perovskite was rapidly developed due to the outstanding property of perovskite materials. However, the blue perovskite LEDs based on the bulk halide perovskites have been rarely researched and showed low efficiencies. The bulk blue perovskite LEDs suffered from insufficient coverage on the substrate due to the low solubility of the inorganic Cl sources or damaged by the structural instability with participation of organic cations. Here, we show the new method of fabricating stable inorganic bulk blue perovskite LEDs with the anion exchange approach to avoid use of insoluble Cl precursors. The devices showed nice operational spectral stability at the desired blue emission peak. The bulk perovskite blue LEDs showed a maximum luminance of 1468 and 494 cd m(-2) for the 490 and 470 nm emission peaks, respectively.

引用

页码：3473 / 3479

页数：7

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