Synthesis and Luminescent Properties of Self-activated LiSr2Ca2（BN2）3 Phosphor

WANG Xin-ran; WANG Feng-xiang; LIAO Yu; MA Yi-zhi; ZHANG Yu; WANG Kai-xuan; ZHOU Xue-lian; CHAO Ke-fu; NA Ri-su

doi:10.37188/CJL.20220217

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Synthesis and Luminescent Properties of Self-activated LiSr₂Ca₂（BN₂）₃ Phosphor

Synthesis and Properties of Materials | 更新时间：2022-10-19

- Synthesis and Luminescent Properties of Self-activated LiSr₂Ca₂（BN₂）₃ Phosphor
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 8, Pages: 1227-1235(2022)
- 作者机构：
  
  1.内蒙古师范大学物理与电子信息学院，内蒙古呼和浩特　010022
  2.内蒙古师范大学内蒙古自治区功能材料物理与化学重点实验室，内蒙古呼和浩特　010022
  3.内蒙古自治区新能源储能材料工程研究中心，内蒙古呼和浩特　010022
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(12164034);Inner Mongolia Natural Science Foundation(2019MS05030);Science and Technology Plan of The Inner Mongolia Autonomous Region(2019GG263);Inner Mongolia Autonomous Region Graduate Education Innovation Plan(SZ2020115);Research and Innovation Fund for Postgraduates of Inner Mongolia Normal University(CXJJS20096)
- DOI：10.37188/CJL.20220217
  CLC： O482.31
- Published：05 August 2022，
  
  Received：30 May 2022，
  
  Revised：09 June 2022，
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王新然,王凤翔,廖雨等.自激活LiSr₂Ca₂（BN₂）₃荧光粉的合成与发光性能[J].发光学报,2022,43(08):1227-1235.

WANG Xin-ran,WANG Feng-xiang,LIAO Yu,et al.Synthesis and Luminescent Properties of Self-activated LiSr₂Ca₂（BN₂）₃ Phosphor[J].Chinese Journal of Luminescence,2022,43(08):1227-1235.
王新然,王凤翔,廖雨等.自激活LiSr₂Ca₂（BN₂）₃荧光粉的合成与发光性能[J].发光学报,2022,43(08):1227-1235. DOI： 10.37188/CJL.20220217.

WANG Xin-ran,WANG Feng-xiang,LIAO Yu,et al.Synthesis and Luminescent Properties of Self-activated LiSr₂Ca₂（BN₂）₃ Phosphor[J].Chinese Journal of Luminescence,2022,43(08):1227-1235. DOI： 10.37188/CJL.20220217.

摘要

自激活发光受到了研究人员的广泛关注，其中硼氮化物缺陷发光材料因毒性低、合成简单、结构多样性等优点，具有成为新一代LED用荧光粉的潜力，但是低热稳定性限制了其实际应用。本文采用高温固相一步法，通过部分取代LiSr

（BN

）

（LSBN）中的Sr，合成了一种新的LiSr

（BN

）

（LSCBN）发光材料。采用X射线衍射仪、扫描电子显微镜和荧光光谱仪对荧光粉的相组成、形貌和光学性质进行了表征。结果表明，所制备的样品LSBN为立方晶系，空间群

Im‐3m

。在紫外区域有较宽的激发带，发射光谱峰值位于561 nm，半峰宽度（FWHM）约为4 504 cm

-1

。LSCBN的发光强度是LSBN的的2倍。解释了LSCBN的发光机理，LSCBN荧光粉中存在替代式缺陷，在光激励下形成发光中心。变温光谱显示，150 ℃时，LSBN的发光强度为初始强度的17%，LSCBN的发光强度为初始强度的57%，超过了已报道的其他硼氮化物荧光粉。这种离子取代的方法能有效调控发光波长和增强荧光强度，改善热稳定性，为硼氮化物缺陷材料发光性能的改善提供了新的思路和应用前景。

Abstract

Self-activated phosphors have received a lot of attention from researchers， among which nitridoborate defect phosphors have the potential to become a new generation of phosphors for LEDs due to low toxicity， simple synthesis， and structural diversity， but low thermal stability limits their practical applications. In this paper， a new LiSr

（BN

）

（LSCBN） phosphor was synthesized by partially replacing Sr in LiSr

（BN

）

（LSBN） using a high-temperature solid-phase one-step method. The phase composition， morphology， and optical properties of the phosphor were characterized by X-ray diffraction， scanning electron microscopy， and fluorescence spectrometry. The results show that the prepared sample LSBN is a cubic crystal system with the space group

Im‐3m

. It has a wide excitation band in the UV region， the peak of the emission spectrum is located at 561 nm， and the full width at half maximum（FWHM） is about 4 504 cm

-1

. The luminescence intensity of a LSCBN is twice that of a LSBN. In LSCBN， the partial replacement of Sr by Ca introduces substitutional defects that form new luminescence centers. In the temperature dependence PL spectra， the intensity of LSBN at 150 ℃ is 17% of the initial value， and LSCBN can maintain 57% of the initial intensity at 150 ℃， which exceeds other nitridoborate phosphors that have been reported. This ion-substitution method can effectively regulate the luminescence wavelength and enhance the luminous intensity， improve the thermal stability， and provide a new idea and application prospect for the improvement of the luminescence performance of defect-related nitridoborate phosphors.

关键词

硼氮化物缺陷发光材料阳离子取代发光机理

Keywords

nitridoboratedefect-related phosphorcation substitutionluminescence mechanism

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