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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (9): 1460-1471.DOI: 10.16553/j.cnki.issn1000-985x.2026.0061

• 研究论文 • 上一篇    下一篇

K+掺杂对Na2CaSiO4∶Tb3+荧光粉发光性能的增强效应研究

孟晓燕(), 郑书怡, 罗朝铭, 汤文杰, 吴丽丹, 杨流赛   

  1. 上饶师范学院化学与环境科学学院,上饶 334001
  • 收稿日期:2026-04-16 出版日期:2026-09-20 发布日期:2026-09-29
  • 作者简介:孟晓燕(1978—),女,安徽省人,副教授。E-mail:mengxiaoyan_bin@163.com
  • 基金资助:
    江西省教育厅科学技术研究项目(GJJ2401709)

Enhancement Effect of K+ Doping on Luminescence Properties of Na2CaSiO4∶Tb3+ Phosphor

MENG Xiaoyan(), ZHENG Shuyi, LUO Chaoming, TANG Wenjie, WU Lidan, YANG Liusai   

  1. School of Chemistry and Environmental Science,Shangrao Normal College,Shangrao 334001,China
  • Received:2026-04-16 Online:2026-09-20 Published:2026-09-29

摘要: 本文采用高温固相法制备了Na2Ca1-x SiO4∶xTb3+(x=0~0.08)和Na2Ca0.95SiO4∶0.05Tb3+/yK+(y=0.03~0.07)系列绿色荧光粉,系统研究了Tb3+单掺、Tb3+/K+共掺杂对样品物相结构、微观形貌、光学吸收、发光性能、色坐标与热稳定性的影响。结果表明,掺杂均未改变Na2CaSiO4基质的立方晶相结构,相结晶度高,且Tb3+有效取代了Ca2+的晶格位置并降低基质带隙。样品的微观形貌不规则且存在明显团聚,在376 nm激发下,Na2Ca1-x SiO4∶xTb3+荧光粉在544 nm处出现Tb3+的5D4→7F5最强特征发射,最佳掺杂物质的量浓度x=0.05;在Na2Ca0.95SiO4∶0.05Tb3+/yK+(y=0.03~0.07)荧光粉中,K+的最佳掺杂物质的量浓度y=0.05。最优组分Na2Ca0.95SiO4∶0.05Tb3+/0.05K+的荧光发光强度约为Na2Ca0.95SiO4∶0.05Tb3+的2.3倍,荧光寿命为3.006 ms,带隙为5.03 eV,CIE色坐标为(0.255, 0.551),473 K时发光强度仍保留室温(298 K)的92.4%,热稳定性优异。该荧光粉是一种在白光发光二极管中有着潜在应用价值的绿色荧光粉。

关键词: Na2CaSiO4∶Tb3+; 高温固相法; 绿色荧光粉; K+掺杂; 发光性能

Abstract: In this paper, Na2Ca1-x SiO4∶xTb3+(x=0~0.08) and Na2Ca0.95SiO4∶0.05Tb3+/yK+(y=0.03~0.07) series of green phosphors were synthesized via the high-temperature solid-state reaction method. The effects of Tb3+ single doping and Tb3+/K+ co-doping on the phase structure, micro-morphology, optical absorption, luminescence properties, chromaticity coordinates, and thermal stability of the samples were systematically investigated. The results demonstrate that doping does not alter the cubic crystal phase structure of the Na2CaSiO4 matrix, which exhibit high crystallinity. Tb3+ effectively occupy Ca2+ lattice sites and reduce the band gap of the matrix. The micro-morphology of the samples is irregular with evident agglomeration. Under excitation at 376 nm, the Na2Ca1-x SiO4∶xTb3+ phosphor exhibits the strongest characteristic emission of Tb3+ corresponding to the 5D4→7F5 transition at 544 nm, and the optimal doping molar concentration is x=0.05. For the Na2Ca0.95SiO4∶0.05Tb3+/yK+ (y=0.03~0.07) phosphors, the optimal doping molar concentration of K+ is y=0.05. The luminescent intensity of the optimized composition Na2Ca0.95SiO4∶0.05Tb3+/0.05K+ is approximately 2.3 times that of Na2Ca0.95SiO4∶0.05Tb3+. It possesses a fluorescence lifetime of 3.006 ms, a band gap of 5.03 eV, and CIE chromaticity coordinates of (0.255, 0.551). At 473 K, its luminescent intensity still maintains 92.4% of that at room temperature (298 K), indicating excellent thermal stability. This phosphor is a promising green-emitting material with potential applications in white light-emitting diodes (W-LEDs).

Key words: Na2CaSiO4∶Tb3+; high temperature solid state method; green phosphor; K+ doping; luminescence property

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