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2009 , Vol. 24 >Issue 5: 1059 - 1063

DOI: https://doi.org/10.3724/SP.J.1077.2009.01059

研究论文

(Y,Bi)AG∶Eu3+红色荧光粉化学共沉淀合成与表征

  • 黎学明 ,
  • 向 星 ,
  • 杨文静 ,
  • 李武林 ,
  • 孔令峰
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  • （重庆大学 化学化工学院, 重庆 400044）

收稿日期: 2009-02-24

  修回日期: 2009-03-30

  网络出版日期: 2009-09-20

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Synthesis and Characterization of (Y,Bi)AG∶Eu3+ Red Phosphor by Coprecipitation Method

  • LI Xue-Ming ,
  • XIANG Xing ,
  • YANG Wen-Jing ,
  • LI Wu-Lin ,
  • KONG Ling-Feng
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  • (College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China)

Received date: 2009-02-24

  Revised date: 2009-03-30

  Online published: 2009-09-20

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摘要

采用化学共沉淀法合成了Bi3+掺杂的YAG∶Eu3+荧光粉，利用DTA-TGA、XRD分析煅烧过程中前驱体的热效应和YAG晶相的形成过程，并通过XRD、SEM、PL表征不同Bi3+含量的YAG∶Eu3+荧光粉结构、形貌及光致发光性能.结果表明：前驱体在煅烧温度1000℃及以上时，可形成纯相的YAG晶相；Bi3+对Eu3+具有敏化作用，Bi3+的掺入使YAG∶Eu3+荧光粉的光致发光峰强度显著增强，当Bi3+含量为0.0010时, 其发光峰强度达到最大值，其后随着Bi3+含量进一步增加，则因浓度猝灭而导致荧光粉发光峰强度降低；掺入Bi3+对YAG∶Eu3+荧光粉晶胞参数有一定的影响，但不会改变其晶体结构；Bi3+掺杂的YAG∶Eu3+荧光粉均匀、无团聚，呈类球型.

关键词： 荧光粉; 石榴石; 共沉淀; 敏化作用

本文引用格式

黎学明 , 向 星 , 杨文静 , 李武林 , 孔令峰 . (Y,Bi)AG∶Eu3+红色荧光粉化学共沉淀合成与表征[J]. 无机材料学报, 2009 , 24(5) : 1059 -1063 . DOI: 10.3724/SP.J.1077.2009.01059

Abstract

Spherical-like (Y,Bi)AG∶Eu3+ red phosphor powders with good photoluminescence performance were synthesized by chemical coprecipitation method. By using DTA-TGA and XRD, both the thermal decomposition and phase formation of (Y,Bi)AG∶Eu3+ precursors were investigated in process of calcination. The crystal structures, surface morphology and luminescence properties of the phosphors with different Bi3+ contents were characterized by means of XRD, SEM and fluorescence spectrometer. The result shows that the pure YAG crystal phase is formed after calcination at 1000℃ or above. The photoluminescence intensity of YAG∶Eu3+ red phosphor strengthens with increasing Bi3+ content due to the sensitizing of Bi3+ to Eu3+，but decreases by excessive Bi3+ ions. When the Bi3+ content is 0.0010, the photoluminescence intensity reaches the highest. Addition of Bi3+ cannot change the crystal structure of YAG∶Eu3+ phosphor, which is garnet with a little different lattice parameter. The particles of (Y,Bi)AG∶Eu3+ red phosphor are spherical-like shapes, narrow size distributions with no aggregation.

Key words： phosphor; garnet; co-precipitation; sensitization

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