期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 29, 期 18, 页码 16041-16049出版社
SPRINGER
DOI: 10.1007/s10854-018-9692-x
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资金
- Natural Science Foundation of Guangxi Province [2017GXNSFDA198023]
- National Natural Science Foundation of China (NSFC) [51362005]
Tm3+/Dy3+ co-doped oxyfluoride borate glasses with composition of 25CaF(2)-25ZnO-6P(2)O(5)-44B(2)O(3) (mol%) for white light-emitting diodes were synthesized by a conventional melting-quenching method. The glass structure, spectroscopic properties and decay time profiles were characterized by XRD and FT-IR, optical and fluorescence spectrum measurements. Under 354 nm excitation, the color tones change from light blue (0.3004, 0.2646) to warm white (0.3626, 0.3642) by increasing concentration of Tm3+. The shortening of the Dy3+ emission decay time in presence of Tm3+ suggests that Dy3+/Tm3+ non-radiative energy transfer occurs. By using the Inokuti-Hirayama model, it is inferred that an electric quadrupole-quadrupole interaction might be the dominant mechanism involved in the energy transfer. The results suggest that the as-prepared Tm3+/Dy3+ co-doped oxyfluoride borate glasses may be promising candidate in white LEDs and other display devices.
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