https://scholars.lib.ntu.edu.tw/handle/123456789/407354
標題: | White emitting Ca2Tb8(SiO4)6O2:Eu2+/Eu3+ phosphors: Photoluminescence and efficient energy transfer | 作者: | Yang C.-Y. Das S. Som S. Lu C.-H. |
關鍵字: | Energy transfer;Photoluminescence;Solid-state diffusion;XPS | 公開日期: | 2016 | 卷: | 660 | 起(迄)頁: | 164-168 | 來源出版物: | Chemical Physics Letters | 摘要: | Ca2Tb8(SiO4)6O2:Eu2+/Eu3+ phosphors were prepared via solid-state diffusion route in reducing ambience. The structural/elemental analyses indicate the formation of pure phase which accommodates both Eu2+/Eu3+ ions. The shift of Tb3+ excitation band from 238 to 295 nm and increase (1.3¡Ñ) in excitation intensity with Eu concentration in Ca2Tb8(SiO4)6O2:Eu2+/Eu3+ phosphor is explained on the basis of Tb3+ to Eu3+ energy transfer. Upon various UV excitations (238?380 nm), Ca2Tb8(SiO4)6O2:Eu2+/Eu3+ showed tunable color emission including warm white light. Moreover, the emission intensity only decreased 15% after increasing the temperature to 200 ¢XC, revealing that present phosphors can be suitable for UV-LEDs. ? 2016 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407354 | ISSN: | 00092614 | DOI: | 10.1016/j.cplett.2016.07.037 |
顯示於: | 化學工程學系 |
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