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3T1R Model and Tuning of Thermoluminescence Intensity by Optimization of Dopant Concentration in Monoclinic Gd2O3: Er3+; Yb3+ Co-doped Phosphor

Abstract

Gd2O3: Er3+; Yb3+ nanophosphor was prepared by using combustion synthesis method. Structural characterization was carried out by X-ray diffraction, and electron microscopy methods. Thermoluminescence (TL) study and kinetic analysis of UV and gamma irradiated phosphor was presented. Prepared phosphor exhibits two TL glow curves around 122 and 263⁰C for UV excitation and 157 and 295⁰C for gamma exposure. The effect of different parameters on the TL glow curve was investigated. The glow curve deconvolution function was applied on the tuned glow peak curve. The trapping parameters were determined for tuned glow curve peaks as well as for the deconvoluted peaks. The reproducibility of the sample was determined by 7 replicate TL measurements. The prepared sample shows good reproducibility for both UV and gamma exposure. Three trap and one recombination centre (3T1R) model was also proposed to explain the concentration quenching effect on thermoluminescence behaviour of the prepared sample.

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Publication details

The article was received on 05 Mar 2017, accepted on 09 May 2017 and first published on 09 May 2017


Article type: Paper
DOI: 10.1039/C7CP01424D
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    3T1R Model and Tuning of Thermoluminescence Intensity by Optimization of Dopant Concentration in Monoclinic Gd2O3: Er3+; Yb3+ Co-doped Phosphor

    R. K. Tarmrakar, K. Upadhyay and D. P. Bisen, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP01424D

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