物理化学学报 >> 2001, Vol. 17 >> Issue (01): 53-58.doi: 10.3866/PKU.WHXB20010111

研究论文 上一篇    下一篇

掺Tb-硅基发光材料制备过程中结构及发光性能

吴红英;王喜贵;谢大弢;翁诗甫;吴瑾光   

  1. 内蒙古师范大学化学系,呼和浩特　010022;北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室,北京　100871
  • 收稿日期:2000-06-07 修回日期:2000-09-10 发布日期:2001-01-15
  • 通讯作者: 吴瑾光

Structure and Luminescence Properties of Tb-doped Sibased Light-emitting

Wu Hong-Ying;Wang Xi-Gui;Xie Da-Tao;Weng Shi-Fu;Wu Jin-Guang   

  1. Department of Chemistry,Inner Mongolia Normal University,Huhehot　010022;College of Chemistry and Molecular Engineering,Peking University,State Key Laboratory of Rare Earth Materials Chemistry and Application,Beijing　100871
  • Received:2000-06-07 Revised:2000-09-10 Published:2001-01-15
  • Contact: Wu Jin-Guang

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摘要： 采用溶胶凝胶技术,制备了不同退火温度下掺Tb3＋的SiO2玻璃,掺Tb3＋的凝胶玻璃在448,544,585,620 nm显示Tb3＋的5D47FJ(J=3,4,5,6)的特征发光光谱.通过不同退火温度下样品的激发光谱、发射光谱、红外光谱、远红外光谱及差热热重谱研究了掺Tb3＋的硅基材料由凝胶向玻璃转变过程中的结构变化及对Tb3＋发光性能的影响.结果显示,在50～100 ℃退火温度下,凝胶大部分吸附水分子被除去,在150～500 ℃退火温度区,是凝胶向玻璃转变的主要结构变化区,并且其发光强度也明显增加,到800 ℃时趋于稳定.这些现象得出一个结论,Tb3＋的发光跃迁被O－H基强烈猝灭而随退火温度的升高而加强.

关键词: 溶胶-凝胶方法, 掺铽凝胶玻璃, 发光性能

Abstract: Tb3＋ ions were incorporated in SiO2 glasses using a solgel process with appropriate heat treatment.Glasses incorporated with Tb3＋ showed emission peaks at 488,544,585,and 620 nm,respectively,exhibiting,respectively,5D4—7FJ(J=3,4,5,6) transition of the Tb3＋ ions.The structural evolution during the transition from gel to glass of Tb3＋ doped SiO2 glasses and the effect on luminescence properties were studied by excitation spectra,emission spectra,IR,farIR and DTATG at differential heat treatment conditions.The results show that most of absorbed water molecules in gel were removed during heat treatment at 50～100 ℃,conversion from gel to glasses was the main structural changes when gel was heattreated in the range 150～500 ℃,and the luminescence intensity increased remarkably also,becoming stable structure at 800 ℃.This observation leads to a conclusion that the radiation electronic transitions of Tb3＋ were quenched strongly by O－H group and were enhanced by temperature elevation.

Key words: Sol-gel method, Tb-doped silica glasses, Luminescence properties