Article
Enriching Red Emission of Y3Al5O12: Ce3+ by Codoping Pr3+ and Cr3+ for Improving Color Rendering of White LEDs
Optics Express
Document Type
Article
Publication Date
1-1-2010
DOI
10.1364/OE.18.025177
Disciplines
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.
Citation Information
Lei Wang, Xia Zhang, Zhendong Hao, Yongshi Luo, et al.. "Enriching Red Emission of Y3Al5O12: Ce3+ by Codoping Pr3+ and Cr3+ for Improving Color Rendering of White LEDs" Optics Express Vol. 18 Iss. 24 (2010) p. 25177 - 25182 Available at: http://works.bepress.com/xiao-jun_wang/33/