https://scholars.lib.ntu.edu.tw/handle/123456789/407439
標題: | Preparation and characterization of tunable YVO4: Bi3+, Sm3+ phosphors | 作者: | Natarajan V. Dhobale A.R. Lu C-H |
關鍵字: | Optical properties;Phosphors;Photoluminescence;Sol-Gel | 公開日期: | 2009 | 卷: | 129 | 期: | 3 | 起(迄)頁: | 290-293 | 來源出版物: | Journal of Luminescence | 摘要: | Yttrium vanadate phosphors co-doped with Bi3+- and Sm3+ ions have been prepared via the solid-state reaction as well as via the sol-gel method. The luminescence studies demonstrate the potential of the prepared phosphors as multi-color emitters, which can be achieved by adjusting the excitation wavelengths. The excitation spectra of Bi3+- and Sm3+ co-doped phosphors clearly revealed energy transfer from Bi3+ to Sm3+ ions. When the co-doped phosphors were excited at 254 nm, the emission from Bi3+ was dominant. Upon excitation at 365 nm, the emission from both Bi3+ and Sm3+ was detected. With 410 nm excitation, Sm3+ ions were selectively excited to yield intense red emission. It is shown that the prepared phosphors with optimal concentrations of Bi3+ and Sm3+ can be excited at 254, 365 and 410 nm to yield yellow, orange and red emissions, respectively. ? 2008. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407439 | ISSN: | 00222313 | DOI: | 10.1016/j.jlumin.2008.10.001 |
顯示於: | 化學工程學系 |
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