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Visible emission and energy transfer in Tb 3+ /Dy 3+ co‐doped phosphate glasses
Author(s) -
Sun Yan,
Yu Fei,
Liao Meisong,
Ma Juping,
Wang Xin,
He Dongbing,
Gao Weiqing,
Knight Jonathan,
Hu Lili
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17391
Subject(s) - phosphate glass , phosphor , fluorescence , analytical chemistry (journal) , materials science , doping , ultraviolet , absorption (acoustics) , ion , visible spectrum , absorption spectroscopy , phosphate , lasing threshold , emission spectrum , luminescence , energy transfer , wavelength , spectral line , chemistry , optics , optoelectronics , molecular physics , physics , organic chemistry , chromatography , astronomy , composite material
In this work, we systematically study the spectroscopic properties of Tb 3+ /Dy 3+ co‐doped phosphate glasses in the visible spectral region and explore the sensitization role of Dy 3+ in the enhancement of visible fluorescence of Tb 3+ ions. Judd‐Ofelt parameters Ω 2 and Ω 4 /Ω 6 of the phosphate glass as host for Tb 3+ are calculated as 21.60 × 10 ‐20 cm 2 and 0.73, respectively, based on the measured spectral absorption. Multiple energy transfer (ET) routes from Dy 3+ to Tb 3+ and their efficiencies are characterized, and the enhanced fluorescence properties of Tb 3+ are investigated, including the emission spectral strength and the spontaneous emission lifetime as functions of Dy 3+ doping concentration. The efficient nonradiative ET processes between Dy 3+ and Tb 3+ allow a moderate concentration level of Tb 3+ to achieve favorably stronger spectral absorption at blue and ultraviolet wavelengths. Tb 3+ /Dy 3+ co‐doped phosphate glass shows promising potential for phosphors and lasing operation at visible wavelengths.