Model to explain the concentration quenching on thermoluminescence behaviour of Eu3+ doped Gd2O3 phosphor under UV irradiation

• Published in: Journal of alloys and compounds Vol. 699; pp. 898 - 906
• Main Authors: Tamrakar, Raunak kumar, Upadhyay, Kanchan, Sahu, Manjulata
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 30.03.2017; Elsevier BV
• Subjects: Europium; Field emission; Field emission gun scanning electron microscopy; Gadolinium oxides; Irradiation; Luminescence; Mathematical models; Phosphors; Quenching; Scanning electron microscopy; Solid state; Thermoluminescence; Thermoluminescence model; Transmission electron microscopy; X-ray diffraction; X-ray diffraction; Transmission electron microscopy; Thermoluminescence model; Field emission gun scanning electron microscopy; Thermoluminescence
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2016.12.415

The present paper reports the synthesis, characterization and thermoluminescence (TL) behaviour of Eu3+ doped Gd2O3 phosphor. The sample was prepared by the solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using powder X-ray diffraction (PXRD), field emission gun scanning electron microscopy (FEGSEM), transmission electron microscopy (TEM) and thermoluminescence (TL) techniques. The calculated average crystal sizes of Eu3+ doped Gd2O3 phosphors are around 66.49 nm and 75.48 nm for 1 mol% Eu3+ and 2.5 mol% Eu3+ concentrations respectively. Thermoluminescence study was carried out for the phosphor with 254 nm UV irradiation. The TL glow curve was found at 116 °C. Computerized glow curve deconvolution (CGCD) was applied on TL response and kinetic parameters were calculated. A general thermoluminescence model is discussed to explain concentration quenching in thermoluminescence behaviour. •Thermoluminescence behaviour of Gd2O3:Eu3+ under UV excitation.•Reproducibility of thermoluminescence behaviour of the Gd2O3:Eu3+.•Dose response of the Gd2O3:Eu3+ phosphor.•Model to explain concentration quenching effect.