کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397912 | 1505874 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Concentration-dependent luminescence and energy transfer in Tb3+/Eu3+ doped borate and fluorozirconate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Tb3+ single- and Tb3+/Eu3+ double-doped borate as well as fluorozirconate glasses are investigated for their photoluminescence and energy transfer properties based on the concentration of the dopants. All the double-doped glasses consist of a constant concentration of 0.5Â at% Tb3+ ions and an increasing Eu3+ ions concentration, ranging from 0.05 to 0.5Â at%. Upon direct excitation of only Tb3+ at 485Â nm, the emission spectra of the double-doped glasses demonstrate an enhancement of typical Eu3+ emissions, thus validating the energy transfer from Tb3+ to Eu3+ in both glass systems. While the spectral composition of the emissions of both borate and fluorozirconate glasses are mostly similar, the radiative decay in borate glass is faster than in fluorozirconate glass. The energy transfer efficiency in each glass system is calculated based on the radiative decay measurements. The mechanism of multipolar interaction underlying the energy transfer is determined to be mostly due to dipole-dipole interactions. With increasing Eu3+ concentration, a gradual shift in chromaticity from green to orange/red is observed. Besides the variation in Eu3+ concentration, tunable chromaticity can also be achieved by varying the excitation wavelength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 187, July 2017, Pages 298-303
Journal: Journal of Luminescence - Volume 187, July 2017, Pages 298-303
نویسندگان
Sebastian Loos, Mreedula Mungra, Bernd Ahrens, Russell Lee Leonard, Adam Evans, Jacqueline Anne Johnson, Franziska Steudel, Stefan Schweizer,