https://scholars.lib.ntu.edu.tw/handle/123456789/407420
標題: | Influence of microemulsion conditions on the VUV-excited luminescence and microstructures of Y3Al5O12: Eu3+ phosphors | 作者: | Hsu C.-H. Huang C.-H. Cheng B.-M. Lu C.-H. |
關鍵字: | Garnet;Microemulsion;Nanoparticles;Phosphors;Synthesis | 公開日期: | 2010 | 卷: | 124 | 期: | 1 | 起(迄)頁: | 632-638 | 來源出版物: | Materials Chemistry and Physics | 摘要: | The effects of preparation conditions on the microstructures and luminescence properties of microemulsion derived YAG: Eu3+ phosphors are investigated in this study. Both the emission spectra and EXAFS results reveal that the local environment of Eu3+ ions becomes more symmetric with increasing calcination temperatures. The symmetric environment of Eu 3+ ions in the host results in increased emission intensity of the 5D0 ¡÷ 7F1 transition. The particle sizes of YAG: Eu3+ phosphors markedly reduce with decreased water content in the microemulsion system. The powders with reduced particle size exhibit strong luminescence intensity because of reduction in the non-radiative probability. For preparing bright YAG: Eu3+ phosphors via the microemulsion route, the water-to-oil volume ratio and calcination conditions need to be well controlled. ? 2010 Elsevier B.V. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407420 | ISSN: | 02540584 | DOI: | 10.1016/j.matchemphys.2010.07.026 |
顯示於: | 化學工程學系 |
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