Enriching Red Emission of Y3Al5O12: Ce3+ by Codoping Pr3+ and Cr3+ for Improving Color Rendering of White LEDs
Document Type
Article
Publication Date
2010
Publication Title
Optics Express
DOI
10.1364/OE.18.025177
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.
Recommended Citation
Wang, Lei, Xia Zhang, Zhendong Hao, Yongshi Luo, Xiao-Jun Wang, Jiahua Zhang.
2010.
"Enriching Red Emission of Y3Al5O12: Ce3+ by Codoping Pr3+ and Cr3+ for Improving Color Rendering of White LEDs."
Optics Express, 18 (24): 25177-25182: Optica Publishing Group.
doi: 10.1364/OE.18.025177
https://digitalcommons.georgiasouthern.edu/physics-facpubs/65
