Preparation and Luminescent Properties of CsPbBr3/Si3N4 Composite

Fan-fan XU; Wen-dong NIE; Li-qin YAO; Sheng-an HE; Guang CHEN; Xin-yu YE

doi:10.37188/CJL.20210085

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Preparation and Luminescent Properties of CsPbBr₃/Si₃N₄ Composite

Synthesis and Properties of Materials | 更新时间：2021-06-18

- Preparation and Luminescent Properties of CsPbBr₃/Si₃N₄ Composite
  增强出版
- Chinese Journal of Luminescence Vol. 42, Issue 6, Pages: 829-837(2021)
- 作者机构：
  
  1.江西理工大学材料化学冶金学部, 江西赣州　 341000
  2.江西理工大学稀土学院, 江西赣州　 341000
  3.国家离子型稀土资源高效开发利用工程技术研究中心, 江西赣州　 341000
  4.江西省稀土发光材料与器件重点实验室, 江西赣州　 341000
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51962005);Natural Science Foundation of Jiangxi Province of China(20192BAB206010);Award Program of Youth Jinggang Scholars program in Jiangxi Province([2018]82)
- DOI：10.37188/CJL.20210085
  CLC：
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Fan-fan XU, Wen-dong NIE, Li-qin YAO, et al. Preparation and Luminescent Properties of CsPbBr₃/Si₃N₄ Composite. [J]. Chinese Journal of Luminescence 42(6):829-837(2021)
DOI：

Fan-fan XU, Wen-dong NIE, Li-qin YAO, et al. Preparation and Luminescent Properties of CsPbBr₃/Si₃N₄ Composite. [J]. Chinese Journal of Luminescence 42(6):829-837(2021) DOI： 10.37188/CJL.20210085.

摘要

近年来，钙钛矿量子点CsPb,X,3,(,X,=Cl,Br,I)稳定性较差的问题引起了广泛关注。本文在室温下合成了稳定的CsPbBr,3,/Si,3,N,4,绿色荧光粉并将其应用于白光发光二极管(WLEDs)。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、激发和发射光谱(PL、PLE)等分析测试手段对CsPbBr,3, 量子点和CsPbBr,3,/Si,3,N,4,荧光粉的结构、形貌、元素组成及光谱特性等进行了分析对比。实验结果表明，CsPbBr,3,/Si,3,N,4,绿色荧光粉的热稳定性、水稳定性、色稳定性均得到了显著提升。80 ℃时CsPbBr,3,/Si,3,N,4,荧光粉的发光强度能保持初始发光强度的87.4%，水中浸没120 min后发光强度能保持初始发光强度的75.5%。CsPbBr,3,/Si,3,N,4,复合材料的量子效率则由CsPbBr,3,量子点粉体的15.4%提升至35.4%。将CsPbBr,3,/Si,3,N,4,复合材料与K,2,SiF,6,∶Mn,4+,红色荧光粉、InGaN基蓝光LED芯片封装制得的WLED器件色域为113.4% NTSC，流明效率达49.4 lm/W。

Abstract

In recent years, the poor stability of perovskite quantum dots CsPb,X,3,(,X,=Cl, Br, I) has attracted extensive attention. In this paper, we synthesized stable CsPbBr,3,/Si,3,N,4, green phosphors at room temperature and applied to white light emitting diodes(WLEDs). The structure, morphology, element composition and luminescent properties of CsPbBr,3, and CsPbBr,3,/Si,3,N,4, 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 CsPbBr,3,/Si,3,N,4, green phosphor were obviously improved. The emission intensity of CsPbBr,3,/Si,3,N,4, 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 CsPbBr,3,/Si,3,N,4, composite is increased from 15.4% of CsPbBr,3, quantum dots powder to 35.4%. By packing the CsPbBr,3,/Si,3,N,4, phosphor with K,2,SiF,6,∶Mn,4+, 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.

关键词

钙钛矿量子点绿色荧光粉稳定性

Keywords

perovskite quantum dotsgreen phosphorstability

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