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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

PDP荧光粉GdBO3:Eu格位选择激发下的光致发光及其相变研究

张巍巍1,3; 谢平波2,3; 张慰萍2,3; 尹民1,3; 楼立人3; 夏上达3   

  1. 1. 中国科学技术大学结构分析开放研究实验室, 合肥 230026; 2. 北京大学稀土材料化学及应用国家重点实验室, 北京 100871; 3. 中国科学技术大学物理系; 合肥 230026
  • 收稿日期:2000-10-09 修回日期:2000-11-03 出版日期:2001-05-20 网络出版日期:2001-05-20

Site Selective Luminescence and Phase Transition of a PDP Phosphor LT-GdBO3:Eu

ZHANG Wei-Wei1,3; XIE Ping-Bo2,3; ZHANG Wei-Ping2,3; YIN Min1,3; LOU Li-Ren3; XIA Shang-Da 3   

  1. 1. Structure Research Laboratory; University of Science and Technology of China; Hefei 230026; China; 2. State Key Laboratory of Rare Earth Materials Chemistry and Application; Beijing 100871, China; 3. Department of Physics, University of Science and Technology of China, Hefei 230026, China
  • Received:2000-10-09 Revised:2000-11-03 Published:2001-05-20 Online:2001-05-20

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摘要： 用溶胶－凝胶法制备了ＰＤＰ用荧光粉ＬＴ－ＧｄＢＯ３：Ｅｕ，并用常规的手段，包括ＸＲＤ、拉曼散射谱、发光光谱等研究了它的晶体结构和光谱性质．利用染料激光系统，选择激发荧光粉中不同格位上 Ｅｕ３＋的５Ｄ０能级，得到了对应于不同格位的两套发射谱，并根据发射谱分析了Ｅｕ３＋的格位对称性，以及对这两种格位之间的能量传递过程产生影响的一些因素．在１０００～１１００℃之间，发生了ＬＴ－ＧｄＢＯ３向另一种Ｖａｔｅｒｉｔｅ结构的ＧｄＢＯ３的相转变．相变的过程伴随着因ＧｄＢＯ３晶体结构发生重排而引起的热吸收．荧光粉ＬＴ－ＧｄＢＯ３：Ｅu有很高的亮度，同时其猝灭浓度高达 ２０ｍｏｌ％．

关键词: PDP荧光粉, 稀土硼酸盐, 格位选择激发, 相交, 浓度猝灭

Abstract: The PDP phosphor, LT-GdBO3:Eu, was prepared by a sol-gel process. Some conventional experiments, such as XRD,
Raman spectrum, and photoluminescence spectra, were given to study its crystal structure and optical properties. When a dye laser system was used, emissions
from 5D0 levels of Eu3+ ions at two different sites were easily distinguished. The site symmetries were analyzed by the emission spectra,
and factors that affectted the energy transfer were also investigated. When the sol-gel sample was sintered at 1100℃, a phase transition to the Vaterite-type
GdBO3 occured, with an absorption of heat which was mainly caused by the realignment of the lattice. The sol-gel samples had quite strong luminescent
intensity. And, at the same time, the quenching concentration was as high as 20mol%.

Key words: PDP phosphor, rare earth borates, site selective excitation, phase transition, concentration quenching

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