Enriching Red Emission of Y3Al5O12: Ce3+ by Codoping Pr3+ and Cr3+ for Improving Color Rendering of White LEDs

Overview

Journal Opt Express

Specialties Biophysics
Ophthalmology

Date 2010 Dec 18

PMID 21164864

Citations 5

Authors

Lei Wang

Xia Zhang

Zhendong Hao

Yongshi Luo

Xiao-Jun Wang

Jiahua Zhang

Affiliations

Soon will be listed here.

Abstract

Triply doped Y3Al5O12: Ce3+, Pr3+, Cr3+ phosphors are prepared by solid state reaction. The emission spectra are enriched in the red region with the luminescence of both Pr3+ and Cr3+ through Ce3+ → Cr3+ and Ce3+ → Pr3+ → Cr3+ energy transfers. The properties of photoluminescence and fluorescence decay indicates larger macroscopic Ce3+ → Cr3+ transfer rates in the triply doped phosphors in comparison to Ce3+ and Cr3+ doubly doped one, reflecting the effect of competition between Ce3+ → Cr3+ and Ce3+ → Pr3+ transfers. White LEDs fabricated using the triply doped phosphor coated on blue LED chips show a color rendering index of 81.4 higher than that either using Ce3+ and Cr3+ doubly doped or Ce3+ singly doped phosphor.

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