Affiliation:
1. Zhejiang University
2. Mechanical Engineering College
Abstract
Y1.97-xTi0.03CdxO2S (0≤x≤0.06) phosphors with long afterglow were synthesized by solid-state
reaction. The photoluminescence spectra, decay curves, thermoluminescnece spectra and Chromaticity
coordinate curves were investigated. Results showed that the luminescence and afterglow intensity of
Y1.97-xTi0.03CdxO2S (0≤x≤0.06) reduced gradually with increasing Cd2+ ion content while the shape and
position of emission peak remain unchanged. The Chromaticity coordinate of present phosphor keeps at
(0.5497,0.4415). Furthermore, based on the results of thermoluminescence curves of Ti, Cd single doped
and co-doped Y2O2S phosphors, the doped Cd ion reduces the inherent trap depth of Ti single doped
Y2O2S:Ti, and induces simultaneously a new trap level in Y2O2S:Ti,Cd phosphor. Thus, it was proposed
that the introduced new structure defect by Cd2+ ions should be responsible for the reducing luminescence
and afterglow property.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference10 articles.
1. F. C. Palilla, A. K. Levine and M. R. Tomkus: J. Electrochem. Soc. Vol. 115 (1968), p.642.
2. V. Abbruscato: J. Electrochem. Soc. Vol. 118 (1971), p.930.
3. P. Y. Zhang, M.Q. Wang, Z.L. Hong, et al.: J. Rare Earths Vol. 22 (2004), p.75.
4. J. Ozawa and H. N. Hersh: Appl. Phys. Lett. Vol. 28 (1976), p.727.
5. P. Y. Zhang, Z. L. Hong, M. Q. Wang, et al.: J. Lumin. Vol. 113 (2005), p.89.