التفاصيل البيبلوغرافية
| العنوان: |
Energy-Transfer-Induced Tunable Luminescence in Mg2Al4Si5O12:Ce3+/Dy3+ Phosphors. |
| المؤلفون: |
Yang, Yu-Guo, Sun, Jian-Jun, Qiu, Cheng-Cheng, Zhang, Rui, Zhang, Yuan-Yuan, Li, Qing-Gang, Wang, Xu-Ping, Liu, Bing, Lv, Xian-Shun, Wei, Lei |
| المصدر: |
Journal of Electronic Materials; May2021, Vol. 50 Issue 5, p2761-2766, 6p |
| مصطلحات موضوعية: |
PHOSPHORS, LUMINESCENCE, X-ray powder diffraction, PHOTOLUMINESCENCE, ENERGY transfer, BLUE light, SOLID solutions |
| مستخلص: |
Ce3+- or/and Dy3+-doped Mg2Al4Si5O18 phosphors have been fabricated via a sintering process at 1400°C for 5 h and their crystallinity and luminescence characteristics investigated. x-Ray powder diffraction analysis demonstrated that Ce3+/Dy3+ ions entered the Mg2Al4Si5O18 host and formed a solid solution. When excited at 345 nm, Ce3+-doped Mg2Al4Si5O18 phosphor emitted light in the blue region while Dy3+-doped Mg2Al4Si5O18 phosphor emitted light in the yellow region. When excited at 345 nm, emission bands located in both the blue and yellow regions were observed for the Ce3+/Dy3+-codoped Mg2Al4Si5O18 phosphor. Because of Ce3+ → Dy3+ energy transfers, the Ce3+/Dy3+-codoped Mg2Al4Si5O18 phosphor showed tunable luminescence, changing from the blue to yellow–green region through the white region with increasing Dy3+ concentration in the Ce3+/Dy3+-codoped Mg2Al4Si5O18 phosphor. The decay characteristics of the Ce3+ emission in the Ce3+/Dy3+-codoped Mg2Al4Si5O18 phosphors were also investigated. With increasing Dy3+ concentration, the lifetime of the Ce3+ emission decreased continuously, further confirming the occurrence of Ce3+ → Dy3+ energy transfer. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |