Preparation and Luminescent Properties of CsPbBr3/Si3N4 Composite

被引：0
作者：
Xu F.-F. [1 ,2 ,3 ]
Nie W.-D. [1 ,2 ,3 ]
Yao L.-Q. [1 ,2 ,3 ]
He S.-A. [1 ,2 ,3 ]
Chen G. [1 ,2 ,3 ]
Ye X.-Y. [1 ,2 ,3 ,4 ]
机构：
[1] Faculty of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou
[2] School of Rare Earth, Jiangxi University of Science and Technology, Ganzhou
[3] Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province, Ganzhou
[4] China National Engineering Research Center for Ionic Rare Earth, Ganzhou
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2021年 / 42卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Green phosphor; Perovskite quantum dots; Stability;
D O I：
10.37188/CJL.20210085
中图分类号：
学科分类号：
摘要：
In recent years, the poor stability of perovskite quantum dots CsPbX3(X=Cl, Br, I) has attracted extensive attention. In this paper, we synthesized stable CsPbBr3/Si3N4 green phosphors at room temperature and applied to white light emitting diodes(WLEDs). The structure, morphology, element composition and luminescent properties of CsPbBr3 and CsPbBr3/Si3N4 phosphors were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive spectrometer(EDS), excitation and emission spectra(PL, PLE). The thermal stability, water and color stability of CsPbBr3/Si3N4 green phosphor were obviously improved. The emission intensity of CsPbBr3/Si3N4 phosphor can maintain 87.4% of the initial emission intensity at 80 ℃, and maintain 75.5% of the initial emission intensity after being immersed in deionized water for 120 min. The quantum efficiency of CsPbBr3/Si3N4 composite is increased from 15.4% of CsPbBr3 quantum dots powder to 35.4%. By packing the CsPbBr3/Si3N4 phosphor with K2SiF6:Mn4+ red phosphor and InGaN based blue LED chip, the color gamut of the WLED device is 113.4% NTSC and the luminous efficiency is 49.4 lm/W. © 2021, Science Press. All right reserved.
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页码：829 / 837
页数：8
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