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Proceedings Paper

Luminescence studies of BaGd2O4: Tb+3 phosphor
Author(s): Appa Rao Bojja; Srinivas Mudavat; Somaiah Karnati; Vithal Muga; Bing Ming Cheng
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Paper Abstract

The polycrystalline BaGd2-xO4: Tbx (x = 0.00 - 0.10) phosphors have been prepared by conventional high temperature solid state reaction method. All the prepared samples were characterized by powder XRD and EDS techniques. The photoluminescence (PL) and thermally stimulated luminescence (TSL) studies of these materials were investigated. For PL studies the samples were excited with 263 nm UV light. All the samples showed strong green emission at 543 nm due to 5D47F5 transition of Tb3+ ions. PL peak intensity was found to increase with increasing dopant concentration. For TSL studies, these samples were γ-irradiated with different dose rates using 60Co source. TSL of these phosphors showed a sharp glow peak with peak maxima at 394 K. It is found that the incorporation of terbium activator in BaGd2O4 host lattice resulted in the increase of TSL intensity. The luminescence results of these materials shows that these are promising candidates for new green emission phosphor.

Paper Details

Date Published: 18 August 2010
PDF: 8 pages
Proc. SPIE 7784, Tenth International Conference on Solid State Lighting, 77841E (18 August 2010); doi: 10.1117/12.868349
Show Author Affiliations
Appa Rao Bojja, Osmania Univ. (India)
Srinivas Mudavat, Osmania Univ. (India)
Somaiah Karnati, Osmania Univ. (India)
Vithal Muga, Osmania Univ. (India)
Bing Ming Cheng, National Synchrotron Radiation Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 7784:
Tenth International Conference on Solid State Lighting
Ian Ferguson; Matthew H. Kane; Nadarajah Narendran; Tsunemasa Taguchi, Editor(s)

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