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- W834604847 abstract "Tb3+ doped boro-alumina-silicate glasses were synthesized in air by high temperature process. Optical absorption, emission and excitation spectra of the glasses have been measured. Effect of concentration quenching on the lifetime and fluorescence yield of 5D3 and 5D4 level has been discussed. The absorption spectrum shows four poor peaks in the UV-Vis region. With excitation at 377 nm, the fluorescence spectrum of the sample has four major emission bands at 488, 542, 584 and 621 nm, which correspond to the 5D4→7Fj (j=6, 5, 4, 3) transitions respectively. The emission from the 5D3→7Fj (j=5, 4, 3) transitions around 415, 437 and 458 nm are very feeble. When Tb3+ concentration beyond a particular value (2%, mole fraction), the concentration quenching phenomenon of 5D3 state occurred, due to the dipole-dipole interaction among the Tb3+. The energy transfer process (5D3+7F6→5D4+7F0) leads to a high quenching concentration (up to 20%) of 5D4 state. The lifetime of 5D4 level in boro-alumina-silicate glass is about 3ms that can be used for new type of long-lasting phosphorescence device." @default.
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- W834604847 date "2007-01-01" @default.
- W834604847 modified "2023-09-28" @default.
- W834604847 title "Optical Studies of Tb 3+ Doped Boro-Alumina-Silicate Glass" @default.
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