Facile Melting-Crystallization Synthesis of Cs2NaxAg1-xInCl6:BiDouble Perovskites for White Light-Emitting Diodes

被引：24

作者：

Li, Xiaoxi ^{[1
]}

Li, Weiwei ^{[2
]}

Xia, Mengling ^{[3
]}

Liu, Chao ^{[1
]}

Li, Neng ^{[1
]}

Shi, Zuhao ^{[1
]}

Xu, Yinsheng ^{[1
]}

Zhang, Xianghua ^{[1
,4
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[3] Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Hubei, Peoples R China

[4] Univ Rennes, ISCR Inst Sci Chim Rennes, CNRS, UMR 6226, F-35000 Rennes, France

来源：

INORGANIC CHEMISTRY | 2022年 / 61卷 / 12期

基金：

中国国家自然科学基金;

关键词：

HALIDE DOUBLE PEROVSKITE; CS2AGINCL6; STABILITY; PHOSPHOR; NANOCRYSTALS; EMISSION; DESIGN; GAPS;

D O I：

10.1021/acs.inorgchem.1c03996

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Lead-free double perovskites (DPs) have out-standing luminescent properties, which make them excellentcandidates for wide use in optoelectronics. Herein, a solvent-freemelting-crystallization technique, which can produce kilogram-scale DP microcrystals (DP-MCs) in one batch, is invented tosynthesize the Cs2NaxAg1-xInCl6:Bi(x= 0, 0.2, 0.4, 0.6, 0.8, and1) DP-MCs. The structure and composition analysis confirmed theproducts are pure Cs2NaxAg1-xInCl6DP-MCs. Affected by Jahn-Teller distortion of AgCl6octahedra, self-trapped excitons appearin the excited state, resulting in the broadband emission (400-850nm) of Cs2Ag1-xNaxInCl6: Bi DP-MCs. The enhancement of thephotoluminescence quantum yield can be realized by introducing Na+to break the parity-forbidden transition in the Cs2AgInCl6DP.Optimized Cs2Na0.4Ag0.6InCl6: Bi DP-MC phosphors combined with commercial blue and green phosphors were coated onultraviolet chips (365 nm) to fabricate white light-emitting diodes (WLEDs) from warm white (2930 K) to cold white (6957 K). Anultrahigh color rendering index of 97.1 and a CCT of 5548 K as well as Commission Internationale de l'Eclairage color coordinatesof (0.331, 0.339) have been demonstrated. This kilogram-scale synthesis technique could stimulate the industrial development ofWLEDs for general lighting based on DP-MC phosphors.

引用

页码：5040 / 5047

页数：8

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