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

doi:10.1088/1674-1056/24/11/117801

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.

Keywords: photoluminescence light-emitting device electroluminescence

Received: 22 April 2015
Revised: 05 June 2015
Accepted manuscript online:

PACS:	78.55.-m	(Photoluminescence, properties and materials)
	85.60.Jb	(Light-emitting devices)
	78.60.Fi	(Electroluminescence)

Corresponding Authors: Dong Yong-Jun
E-mail: dongyj@siom.ac.cn

Cite this article:

Du Yong (杜勇), Shao Chong-Yun (邵冲云), Dong Yong-Jun (董永军), Yang Qiu-Hong (杨秋红), Hua Wei (华伟) Spectral investigation of R, Ce:YAG (R: Pr³⁺, Eu³⁺, Gd³⁺) single crystals and their applications in white LEDs 2015 Chin. Phys. B 24 117801

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

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