Room temperature synthesis of stable single silica-coated CsPbBr3 quantum dots combining tunable red emission of Ag-In-Zn-S for High-CRI white light-emitting diodes

被引：237

作者：

Guan, Hongling ^{[1
]}

Zhao, Shuangyi ^{[1
]}

Wang, Huaxin ^{[1
]}

Yan, Dongdong ^{[1
]}

Wang, Ming ^{[1
]}

Zang, Zhigang ^{[1
]}

机构：

[1] Chongqing Univ, Key Lab Optoelect Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

来源：

NANO ENERGY | 2020年 / 67卷

基金：

中国国家自然科学基金;

关键词：

CsPbBr3; QDs; Stability; Ag-In-Zn-S QDs; WLEDs; INORGANIC PEROVSKITE NANOCRYSTALS; LEAD HALIDE PEROVSKITES; LARGE-SCALE SYNTHESIS; NANOWIRE LASERS; HIGH-QUALITY; EFFICIENT; PHOSPHORS; PHOTOLUMINESCENCE; CSPBX3; CL;

D O I：

10.1016/j.nanoen.2019.104279

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

White light emitting diodes (WLEDs) based on all-inorganic halide (CsPbX3, X = Cl, Br and I) perovskite quantum dots (QDs) have attracted broad attention due to their high brightness. However, their poor stability and anionexchange reaction when utilized together are still the main challenges that impede their applications. Herein, a one-step in situ method under room temperature in air is proposed to synthesize CsPbBr3 QDs coated with SiO2 (CsPbBr3@SiO2), where the whole process takes only 20 s. The as-prepared CsPbBr3@SiO2 QDs samples present an enhanced stability in the thermal and polar-solvent environment, maintaining its high photoluminescence quantum yield (PLQY-75%). Thereby WLEDs are constructed by combining CsPbBr3@SiO2 with red Ag-In-Zn-S QDs on InGaN blue chip, achieving a high color rendering index (CRI) of 91, a correlated color temperature (CCT) of 3689 K and a power efficiency of 40.6 lm(-)(1).

引用

页数：9