中国物理B ›› 2015, Vol. 24 ›› Issue (11): 117801-117801.doi: 10.1088/1674-1056/24/11/117801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Spectral investigation of R, Ce:YAG (R: Pr3+, Eu3+, Gd3+) single crystals and their applications in white LEDs

杜勇a, 邵冲云a, 董永军b, 杨秋红a, 华伟b   

  1. a School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
    b Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2015-04-22 修回日期:2015-06-05 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Dong Yong-Jun E-mail:dongyj@siom.ac.cn

Spectral investigation of R, Ce:YAG (R: Pr3+, Eu3+, Gd3+) single crystals and their applications in white LEDs

Du Yong (杜勇)a, Shao Chong-Yun (邵冲云)a, Dong Yong-Jun (董永军)b, Yang Qiu-Hong (杨秋红)a, Hua Wei (华伟)b   

  1. a School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
    b Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2015-04-22 Revised:2015-06-05 Online:2015-11-05 Published:2015-11-05
  • Contact: Dong Yong-Jun E-mail:dongyj@siom.ac.cn

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摘要： Eu3+, Pr3+, or Gd3+ codoped Ce:YAG single crystals were grown by using the Czochralski method. The photoluminescence (PL) emission and excitation spectra and transmittance were measured and investigated. The additional red-emitting bands were observed in the PL emission spectra of Eu,Ce:YAG and Pr,Ce:YAG single crystals and the formation of noticeable peaks was studied with reference to the schematic energy level diagrams. A red-shifted phenomenon was observed in the PL emission spectrum of Gd,Ce:YAG. With codoped Eu3+, Pr3+, or Gd3+ ions, warmer white light was achieved for the white light emitting diodes and the color rendering index became higher.

关键词: photoluminescence, light-emitting device, electroluminescence

Abstract: Eu3+, Pr3+, or Gd3+ codoped Ce:YAG single crystals were grown by using the Czochralski method. The photoluminescence (PL) emission and excitation spectra and transmittance were measured and investigated. The additional red-emitting bands were observed in the PL emission spectra of Eu,Ce:YAG and Pr,Ce:YAG single crystals and the formation of noticeable peaks was studied with reference to the schematic energy level diagrams. A red-shifted phenomenon was observed in the PL emission spectrum of Gd,Ce:YAG. With codoped Eu3+, Pr3+, or Gd3+ ions, warmer white light was achieved for the white light emitting diodes and the color rendering index became higher.

Key words: photoluminescence, light-emitting device, electroluminescence

中图分类号:  (Photoluminescence, properties and materials)

  • 78.55.-m
85.60.Jb (Light-emitting devices) 78.60.Fi (Electroluminescence)