https://scholars.lib.ntu.edu.tw/handle/123456789/407378
標題: | Photoluminescence properties of color-tunable Ca 3 la 6(SiO 4)6: Ce 3+, Tb 3+ phosphors | 作者: | Lin H.-C. Yang C.-Y. Das S. Lu C.-H. |
公開日期: | 2014 | 卷: | 97 | 期: | 6 | 起(迄)頁: | 1866-1872 | 來源出版物: | Journal of the American Ceramic Society | 摘要: | A series of newly developed color-tunable Ca3La 6(SiO4)6: Ce3+, Tb3+ phosphors were successfully prepared in this study. The crystal structures of the prepared phosphors were revealed to be hexagonal with space group P6 3/m, and the lattice parameters were evaluated via utilizing the Rietveld refinement method. Upon excitation at 288 nm, the emission spectra of Ce3+and Tb3+ ions co-doped Ca3La 6(SiO4)6 phosphors included a blue emission band and several emission lines. The blue emission band with a peak at 420 nm originated in the f-d transitions of Ce3+ ions, and the emission lines in the range of 450-650 nm were assigned to the 5D4 ¡÷ 7FJ (J = 6, 5, 4, 3) transitions of Tb3+ ions. Increasing the doping content of Tb3+ ions considerably strengthened Tb3+ emission and reduced Ce3+ emission owing to the energy transfer from Ce3+ to Tb3+ ions. The mechanism of the energy transfer was confirmed to be a dipole-dipole interaction. The effective energy transfer from Ce3+ to Tb 3+ ions caused a color shift from purplish-blue to yellowish-green. Color-tunable Ca3La6(SiO4)6: Ce 3+, Tb3+ phosphors have the potential to be utilized in light-emitting diodes with proper modulation of the amount of Tb3+ ions. ? 2014 The American Ceramic Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407378 | ISSN: | 00027820 | DOI: | 10.1111/jace.12846 |
顯示於: | 化學工程學系 |
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