Paper Title:
Luminescence Properties of Rare-Earth Doped α-SiAlONs
  Abstract

Rare-earth doped Ca-α-SiAlON phosphors, with the compositions of (Ca1-3/2xREx)m/2Si12-m-nAlm+nOnN16-n (RE = Ce, Sm, Eu, Tb, Yb and Dy, 0.5 ≤ m = 2n ≤ 3.0), were prepared by reaction at 1700oC for 2h under 10 atm N2. The concentration of rare earths varied from 3 to 30 at% with respect to Ca. The photoluminescence properties of the powders were investigated at room temperature. The results show that (i) strong visible emissions are observed in rare-earth doped Ca-α-SiAlONs; (ii) the emission properties can be optimized by tailoring the activator concentration and the composition of the α-SiAlON host crystal; and (iii) the yellow Eu2+-doped Ca-α-SiAlON phosphors can be used in warm white LEDs.

  Info
Periodical
Key Engineering Materials (Volumes 317-318)
Edited by
T. Ohji, T. Sekino and K. Niihara
Pages
797-802
DOI
10.4028/www.scientific.net/KEM.317-318.797
Citation
R. J. Xie, M. Mitomo, N. Hirosaki, "Luminescence Properties of Rare-Earth Doped α-SiAlONs", Key Engineering Materials, Vols. 317-318, pp. 797-802, 2006
Online since
August 2006
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Price
$32.00
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