- Title
- Photoluminescence and thermoluminescence properties of BaGa2O4
- Creator
- Noto, L L, Poelman, D, Orante-Barrón, V R, Swart, H C, Mathevula, Langutani E, Nyenge, R, Chithambo, Makaiko L, Mothudi, B M, Dhlamini, M S
- Date
- 2018
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/116037
- Identifier
- vital:34292
- Identifier
- https://doi.org/10.1016/j.physb.2017.07.059
- Description
- Rare–Earth free luminescent materials are fast becoming important as the cost of rare earth ions gradually increases. In this work, a Rare–Earth free BaGa2O4 luminescent compound was prepared by solid state chemical reaction, which was confirmed to have a single phase by X-ray Diffraction. The Backscattered Electron image and Energy Dispersive X-ray spectroscopy maps confirmed irregular particle and homogeneous compound formation, respectively. The Photoluminescence spectrum displayed broad emission between 350 to 650 nm, which was deconvoluted into two components. The photoluminescence excitation peak was positioned at 254 nm, which corresponds with the band-to-band position observed from the diffuse reflectance spectrum. The band gap was extrapolated to 4.65 ± 0.02 eV using the Kubelka-Munk model. The preliminary thermoluminescence results indicated that the kinetics involved were neither of first nor second order. Additionally, the activation energy of the electrons within the trap centres was approximated to 0.61 ± 0.01 eV using the Initial Rise model.
- Format
- 4 pages, pdf
- Language
- English
- Relation
- Physica B: Condensed Matter, Noto, L.L., Poelman, D., Orante-Barrón, V.R., Swart, H.C., Mathevula, L.E., Nyenge, R., Chithambo, M., Mothudi, B.M. and Dhlamini, M.S., 2018. Photoluminescence and thermoluminescence properties of BaGa2O4. Physica B: Condensed Matter, 535, pp.268-271., Physica B: Condensed Matter volume 535 268 271 April 2018 1873-2135
- Rights
- Elsevier
- Rights
- Use of this resource is governed by the terms and conditions of the Science Direct Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
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RU Department of Physics and Electronics
Chithambo, Makaiko Liwiro (Distinguished Prof)
SDG 09. Industry, Innovation and Infrastructure
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