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

Eu3＋, Pr3＋, or Gd3＋ codoped Ce：YAG single crystals were grown by using the Czochralski method. The pho- toluminescence （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...

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Bibliographic Details
Published in中国物理B：英文版 no. 11; pp. 506 - 511
Main Author 杜勇 邵冲云 董永军 杨秋红 华伟
Format Journal Article
LanguageEnglish
Published 2015
Subjects
CE：YAG
单晶体
应用
提拉法生长
激发光谱
白光LED
白光发光二极管
荧光发射光谱
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ISSN1674-1056
2058-3834

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Summary:Eu3＋, Pr3＋, or Gd3＋ codoped Ce：YAG single crystals were grown by using the Czochralski method. The pho- toluminescence （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 forma- tion 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.
Bibliography:11-5639/O4
photoluminescence, light-emitting device, electroluminescence
Eu3＋, Pr3＋, or Gd3＋ codoped Ce：YAG single crystals were grown by using the Czochralski method. The pho- toluminescence （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 forma- tion 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.
ISSN:1674-1056
2058-3834