The photoluminescence properties of Eu{sup 3+},Bi{sup 3+} co-doped yttrium oxysulfide phosphor under vacuum ultraviolet excitation
- Department of Materials Science, Lanzhou University, Lanzhou 730000 (China)
- Shenzhen Star Optoelectronic Technology Co., Ltd., Shenzhen 518100 (China)
Y{sub 2}O{sub 2}S co-doped with Bi{sup 3+},Eu{sup 3+} phosphors were prepared and their luminescence properties under vacuum ultraviolet (VUV) excitation were investigated. Much stronger red emission for Y{sub 2}O{sub 2}S:Eu{sup 3+},Bi{sup 3+} were observed under 147 nm excitation than that for Y{sub 2}O{sub 2}S:Eu{sup 3+}. Investigation on photoluminescence and calculation of electronic structure of Y{sub 2}O{sub 2}S:Eu{sup 3+},Bi{sup 3+} revealed that the Bi{sup 3+} acts as a medium in energy transfer process and the great VUV luminescence enhancement of Y{sub 2}O{sub 2}S:Eu{sup 3+} by doping Bi{sup 3+} is due to effective energy transfer process: charge transfer (CT) transition of Y{sup 3+}-O{sup 2-} {yields} Bi{sup 3+} {yields} Eu{sup 3+}. The Y{sub 2}O{sub 2}S:Eu{sup 3+},Bi{sup 3+} showed excellent optical properties when compared with the commercial (Y,Gd)BO{sub 3}:Eu{sup 3+}. Thus, the Y{sub 2}O{sub 2}S:Eu{sup 3+},Bi{sup 3+} would be a promising VUV-excited red phosphor.
- OSTI ID:
- 21199782
- Journal Information:
- Materials Research Bulletin, Vol. 44, Issue 5; Other Information: DOI: 10.1016/j.materresbull.2008.11.003; PII: S0025-5408(08)00385-1; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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