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CaSc2O4:Eu3+: A Tunable Full-Color Emitting Phosphor for White Light Emitting Diodes
Optical Materials
  • Zhendong Hao, Chinese Academy of Sciences
  • Jiahua Zhang, Chinese Academy of Sciences
  • Xia Zhang, Chinese Academy of Sciences
  • Xiao-Jun Wang, Georgia Southern University
Document Type
Article
Publication Date
1-1-2011
DOI
10.1016/j.optmat.2010.09.035
Disciplines
Abstract

We report an intense full-color emission originating from 5D0,1,2,3 to 7F0,1,2,3,4 transitions of Eu3+ in CaSc2O4 upon 395 nm excitation. The emission spectra vary with increasing Eu3+ concentration, demonstrating tunable color coordinates from white to red region in the CIE chromaticity diagram. Considering the relaxation from 5DJ to 5DJ−1 through cross energy transfer, the Eu3+ concentration dependent emission spectra are well simulated based on the analysis of steady state rate equations and the measured lifetimes of the 5DJ levels. It is suggested that CaSc2O4:Eu3+ could be a potential single-phased full-color emitting phosphor for near-ultraviolet InGaN chip pumped white light emitting diodes.

Citation Information
Zhendong Hao, Jiahua Zhang, Xia Zhang and Xiao-Jun Wang. "CaSc2O4:Eu3+: A Tunable Full-Color Emitting Phosphor for White Light Emitting Diodes" Optical Materials Vol. 33 Iss. 3 (2011) p. 355 - 358
Available at: http://works.bepress.com/xiao-jun_wang/52/