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Vacuum Ultraviolet Excited Photoluminescence Properties of Y2O2S:Eu^3+,Bi^3+ Phosphor
引用本文:WANG Zhi-long WANG Yu-hua ZHANG Jia-chi. Vacuum Ultraviolet Excited Photoluminescence Properties of Y2O2S:Eu^3+,Bi^3+ Phosphor[J]. 高等学校化学研究, 2008, 24(6): 679-682. DOI: 10.1016/S1005-9040(09)60005-2
作者姓名:WANG Zhi-long WANG Yu-hua ZHANG Jia-chi
作者单位:Department of Materials Science; Lanzhou University, Lanzhou 730000, P. R. China
基金项目:Supported by the Project of the Combination of Industry and Research by the Ministry of Education of China and Guangdong Province, China(No.0712226100023).
摘    要:As an Hg-free lamp using phosphor, the Bi^3+ and EH^3+ co-doped Y2O2S phosphors were prepared and their luminescence properties under vacuum ultraviolet(VUV) excitation were investigated. The VUV photoluminescent intensity of Y2O2S:Eu^3+ was weak, however, considerably stronger red emission at 626 nm with good color purity was observed in Y2O2S:Eu^3+,Bi^3+ systems. Investigation on the photoluminescence reveals that the strong VUV luminescence of Y2O2S:Eu^3+,Bi^3+ at 147 nm is mainly because the Bi^3+ acts as a medium and effectively performs the energy transfer process: Y^3+-O^2-→Bi^3+→Eu^3+, while the intense emission band at 172 nm is attributed to the absorption of the characteristic ^1So-^1P1 transition of Bi^3+ and the direct energy transfer from Bi^3+ to Eu^3+. The Y2O2S:Eu^3+,Bi^3+ shows excellent VUV optical properties compared with the commercial (Y,Gd)BO3:Eu^3+. Thus, the Y2O2S:Eu^3+,Bi^3+ can be a potential red VUV-excited candidate applied in Hg-free lamps for backlight of liquid crystal display.

关 键 词:Y2O2S:Eu^3+,Bi^3+  真空紫外线辐射  金星  光致发光
收稿时间:2008-02-28

Vacuum Ultraviolet Excited Photoluminescence Properties of Y2O2S:Eu,Bi Phosphor
Zhi-long WANG,Yu-hua WANG,Jia-chi ZHANG. Vacuum Ultraviolet Excited Photoluminescence Properties of Y2O2S:Eu,Bi Phosphor[J]. Chemical Research in Chinese University, 2008, 24(6): 679-682. DOI: 10.1016/S1005-9040(09)60005-2
Authors:Zhi-long WANG  Yu-hua WANG  Jia-chi ZHANG
Affiliation:aDepartment of Materials Science, Lanzhou University, Lanzhou 730000, P. R. China
Abstract:As an Hg-free lamp using phosphor, the Bi3+ and Eu3+ co-doped Y2O2S phosphors were prepared and their luminescence properties under vacuum ultraviolet(VUV) excitation were investigated. The VUV photoluminescent intensity of Y2O2S:Eu3+ was weak, however, considerably stronger red emission at 626 nm with good color purity was observed in Y2O2S:Eu3+,Bi3+ systems. Investigation on the photoluminescence reveals that the strong VUV luminescence of Y2O2S:Eu3+Bi3+ at 147 nm is mainly because the Bi3+ acts as a medium and effectively performs the energy transfer process: Y3+-O2-→Bi3+→Eu3+, while the intense emission band at 172 nm is attributed to the absorption of the characteristic 1S0-1P1 transition of Bi3+ and the direct energy transfer from Bi3+ to Eu3+. The Y2O2S:Eu3+,Bi3+ shows excellent VUV optical properties compared with the commercial (Y, Gd)BO3:Eu3+. Thus, the Y2O2S:Eu3+,Bi3+ can be a potential red VUV-excited candidate applied in Hg-free lamps for backlight of liquid crystal display.
Keywords:Y2O2S:Eu3+,Bi3+   Vacuum ultraviolet(VUV)   Phosphor
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