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

• 作者: 华伟 杜勇 杨秋红 董永军 邵冲云
• 来源期刊: 中国物理B（英文版）
• 关键词: photoluminescence light-emitting device electroluminescence
• 年，卷（期）: 2015,（11）
• 页码范围: 117801-1-117801-6
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/11/117801

摘要

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.