Tb3+ doped Zinc Alumino Bismuth Borate glasses for green emitting luminescent devices

K Swapna, S Mahamuda, AS Rao, M Jayasimhadri… - Journal of …, 2014 - Elsevier
Journal of luminescence, 2014Elsevier
Abstract Zinc Alumino Bismuth Borate (ZnAlBiB) glasses doped with terbium (Tb 3+) ions
with a chemical composition 20ZnO–10Al 2 O 3–(10− x) Bi 2 O 3–60B 2 O 3− xTb 2 O 3 (x=
0.1, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) were prepared by a conventional melt quenching
method and studied their optical absorption, photoluminescence and decay spectral
properties. The Judd–Ofelt (J–O) parameters evaluated from the experimental oscillator
strengths were used to measure the radiative properties for the prominent luminescent …
Abstract
Zinc Alumino Bismuth Borate (ZnAlBiB) glasses doped with terbium (Tb3+) ions with a chemical composition 20ZnO–10Al2O3–(10−x)Bi2O3–60B2O3xTb2O3 (x=0.1, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) were prepared by a conventional melt quenching method and studied their optical absorption, photoluminescence and decay spectral properties. The Judd–Ofelt (J–O) parameters evaluated from the experimental oscillator strengths were used to measure the radiative properties for the prominent luminescent transitions of Tb3+ ions such as 5D47F6, 7F5, 7F4 and 7F3. The effect of Tb3+ ion concentration on the luminescence process observed in the visible region was discussed in detail. The emission spectra recorded for all the ZnAlBiB glasses doped with Tb3+ ions, show an intense peak in green region at 542 nm. The stimulated emission cross-section, branching ratios and quantum efficiency values evaluated for green emission (5D47F5) suggests the utility of these glasses for green luminescence applications. It was found that, within the concentration range investigated, 2.5 mol% of Tb3+ doped ZnAlBiB glass is most suitable for green luminescence applications at 542 nm in principle.
Elsevier
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