Luminescence studies of BaGd2O4: Tb+3 phosphor

Appa Rao Bojja; Srinivas Mudavat; Somaiah Karnati; Vithal Muga; Bing Ming Cheng

doi:10.1117/12.868349

18 August 2010 Luminescence studies of BaGd₂O₄: Tb⁺³ phosphor

Appa Rao Bojja, Srinivas Mudavat, Somaiah Karnati, Vithal Muga, Bing Ming Cheng

Proceedings Volume 7784, Tenth International Conference on Solid State Lighting; 77841E (2010) https://doi.org/10.1117/12.868349
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

The polycrystalline BaGd_2-xO₄: Tb_x (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 ⁵D₄→⁷F₅ 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.

Citation Download Citation

Appa Rao Bojja, Srinivas Mudavat, Somaiah Karnati, Vithal Muga, and Bing Ming Cheng "Luminescence studies of BaGd₂O₄: Tb⁺³ phosphor", Proc. SPIE 7784, Tenth International Conference on Solid State Lighting, 77841E (18 August 2010); https://doi.org/10.1117/12.868349

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