Enhanced photoluminescence quantum efficiency and stability of water assisted CsPbBr3 perovskite nanocrystals

被引：19

作者：

Kim, Minji ^{[1
]}

Kim, Jae Ho ^{[1
]}

Kim, Maengsuk ^{[2
]}

Kim, Chang Su ^{[1
]}

Choi, Jin Woo ^{[1
]}

Choi, Keunsu ^{[3
]}

Lee, Jun Hee ^{[2
]}

Park, Juyun ^{[4
]}

Kang, Young-Cheol ^{[4
]}

Jin, Sung-Ho ^{[5
]}

Song, Myungkwan ^{[1
]}

机构：

[1] Korea Inst Mat Sci KIMS, Surface Technol Div, 797 Changwondae Ro, Chang Won 51508, Gyeongsangnam D, South Korea

[2] Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Ulsan 44919, South Korea

[3] Ulsan Natl Inst Sci & Technol UNIST, Dept Phys, Ulsan 44919, South Korea

[4] Pukyong Natl Univ, Dept Chem, 45 Yongso Ro, Busan 48513, South Korea

[5] Pusan Natl Univ, Dept Chem, Educ Grad Dept Chem Mat, Inst Plast Informat & Energy Mat, Busan 46241, South Korea

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2020年 / 88卷

关键词：

Water-assisted; Perovskite; Nanocrystals; Quantum dots; CsPbBr3; SOLAR-CELLS; DOTS; CRYSTALLIZATION; DISPLAYS;

D O I：

10.1016/j.jiec.2020.04.027

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Perovskite nanocrystals (NCs) are promising emissive materials for application in light-emitting diodes (LEDs) due to their high quantum efficiency and narrow full width at half maximum (FWHM). However, the ion bonding character of perovskite leads to their quick chemical decomposition under atmospheric moisture. Herein, we present CsPbBr3 perovskite NCs that achieved improved efficiency and stability with the addition of water during the synthesis process. The CsPbBr3 NCs synthesized with a controlled amount of water exhibited a quantum yield greater than 90%, sustained stability over 35 days and a much narrower FWHM than CsPbBr3 NCs that did not use water. Finally, water-added perovskite NC LEDs were fabricated and they showed a nearly 5-times improvement in current efficiency compared to the reference device. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：84 / 89

页数：6

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