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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (12): 2146-2155.DOI: 10.16553/j.cnki.issn1000-985x.2025.0179

• 研究论文 • 上一篇    下一篇

Li+掺杂YPO4∶Dy3+荧光粉的诱导相变与发光性能优化

詹畯伟1,2,3(), 阮勇奇1, 陈志强1, 温磊1, 彭思艳1,2(), 杨流赛1,2()   

  1. 1.上饶师范学院化学与环境科学学院,上饶 334001
    2.江西省教育厅黑滑石功能材料制备与应用重点实验室,上饶 334001
    3.南昌航空大学环境与化学工程学院,南昌 330063
  • 收稿日期:2025-08-11 出版日期:2025-12-20 发布日期:2026-01-04
  • 通信作者: 彭思艳,博士,教授。E-mail:psypsy524@126.com;杨流赛,博士,副教授。E-mail:yangliusai@126.com
  • 作者简介:詹畯伟(1999—),男,江西省人,硕士研究生。E-mail:1608682017@qq.com
  • 基金资助:
    江西省自然科学基金(20212BAB213029);大学生省级创新训练项目(S202510416007);上饶师范学院校级课题(SRYY02);上饶师范学院校级课题(SRYY04);上饶市科技项目(2025D011)

Induced Phase Transformation and Luminescence Performance Optimization of Li+ Doped YPO4∶Dy3+ Phosphors

ZHAN Junwei1,2,3(), RUAN Yongqi1, CHEN Zhiqiang1, WEN Lei1, PENG Siyan1,2(), YANG Liusai1,2()   

  1. 1. School of Chemistry and Environmental Science,Shangrao Normal University,Shangrao 334001,China
    2. Key Laboratory of Preparation and Application of Black Talc Functional Materials,Jiangxi Provincial Department of Education,Shangrao 334001,China
    3. School of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,China
  • Received:2025-08-11 Online:2025-12-20 Published:2026-01-04

摘要: 本文以水热法结合高温煅烧制备了一系列不同Li+掺杂浓度的YPO4∶Dy3+荧光粉,系统研究了Li+共掺杂对YPO4∶Dy3+荧光粉的结构、形貌和发光性能的影响。XRD结果表明,Li+掺杂促进了YPO4·0.8H2O从六方相到四方相的转变,且Li+可以取代Y3+的晶格位置或占据间隙位置。SEM结果显示,随着Li+掺杂浓度的增加,荧光粉形貌由六棱柱状向球形颗粒转变,同时平均粒径逐渐减小。通过荧光光谱分析,适量Li+掺杂能够显著提高YPO4∶Dy3+荧光粉的发光强度,当Li+掺杂量为5%时,其发光强度达到最大值,约为未掺杂样品的2.3倍。同时,Li+掺杂还可以改善荧光粉的热稳定性。随着Li+掺杂量的增加(x=1%~7%),YPO4∶5%Dy3+xLi+荧光粉的CIE色度坐标值从(0.233, 0.283)逐渐变化至(0.238, 0.289)。研究结果表明,Li+共掺杂是调控YPO4∶Dy3+荧光粉发光性能的有效手段,并为该荧光粉在白光LED领域的应用提供了理论依据和实验基础。

关键词: 磷酸钇; 碱金属; Dy3+掺杂; 相变调控; 发光性能

Abstract: A series of YPO4∶Dy3+ phosphors with different Li+ doping concentrations were synthesized via a hydrothermal method combined with high-temperature calcination. The effects of Li+ co-doping on the structure, morphology and luminescence properties of YPO4∶Dy3+ phosphors were systematically investigated. X-ray diffraction (XRD) results indicate that Li+ doping promotes the phase transition of YPO4·0.8H2O from hexagonal to tetragonal phase. Moreover, Li+ could either substitute Y3+ at lattice sites or occupy interstitial positions. Scanning electron microscopy (SEM) results show that with the increase of Li+ doping concentration, the morphology of the phosphor changes from hexagonal prism to spherical particles, and the average particle size gradually decreases. Fluorescence spectroscopy analysis reveals that appropriate Li+ doping can significantly enhance the luminescence intensity of YPO4∶Dy3+ phosphors. When the Li+ doping amount is 5%, the luminescence intensity reaches the maximum value, which is approximately 2.3 times that of the undoped sample. Meanwhile, Li+ doping can also improve the thermal stability of the phosphor. With the increase of Li+ doping amount (x=1%~7%), the CIE chromaticity coordinates of YPO4∶5%Dy3+xLi+ phosphors change gradually from (0.233, 0.283) to (0.238, 0.289). The research results demonstrate that Li+ co-doping is an effective approach to regulate the luminescence properties of YPO4∶Dy3+ phosphors, and provides theoretical basis and experimental foundation for their application in the field of white light-emitting diodes (LEDs).

Key words: yttrium phosphate; alkali metal; Dy3+ doping; phase transition regulation; luminescence performance

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