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Luminescence efficiencies of self- and Tm activated CaWO4 under vacuum ultraviolet radiation excitation |
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| Authors: | Seon-Bae Kim Hyun Myung Jang Bong koo Kang |
| Affiliation: | a Department of Materials Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-Dong, Pohang, Kyungpook 790-784, South Korea b Saveetha Engineering College, Thandalam, Chennai 602105, India c Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, San 31, Hyoja-Dong, Pohang, Kyungpook 790-784, South Korea |
| Abstract: | Luminescence efficiency of self-activated CaWO4 under 147 nm vacuum ultraviolet (VUV) radiation excitation is about 90% of that of BaMgAl10O17:Eu2+ (BAM), the commercial blue plasma display panel (PDP) phosphor. However, the color purity and the particle size of the former needs substantial modification before it can be considered for application in PDP. CaWO4:Tm exhibits Tm3+ emission peaks in the blue region due to energy transfer from WO4 to Tm3+ ions but the overall emission intensity under 147 nm excitation is reduced when compared to that of CaWO4. |
| Keywords: | VUV fluorescence Color purity Grain size Self- and Tm activated CaWO4 BAM:Eu2+ Blue PDP phosphor |
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