Optical and thermoluminescence response of rare earth activated aluminium borate crystals

• Published in: Optical materials Vol. 127; p. 112263
• Main Authors: Ike, P.O., Nwanya, A.C., Agwu, K.K., Ezema, Fabian I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2022
• Subjects: Aluminium borate; Dopants; Dysprosium; Gadolinium; Kinetic parameters; Thermoluminescence; Aluminium borate; Dopants; Gadolinium; Dysprosium; Kinetic parameters; Thermoluminescence
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2022.112263

Rare earth elements of gadolinium and dysprosium at different mole concentrations doped on aluminium borate were studied for their structural, optical and thermoluminescence properties. The samples of Al2(B4O7)3:Gd/Dy were prepared by using the high temperature solid state sintering technique. X-ray diffraction and Scanning electron microscopy showed a difference in both the crystallite size and the particle size for the Undoped, gadolinium doped and dysprosium doped aluminium borate. Fourier transform infrared spectroscopy study identified different functional groups. The optical properties revealed a variation in the absorbance when compared with the different concentrations of the Gd and Dy dopants used on aluminium borate. Thermoluminescence from all the samples measured at 1oCs−1 following irradiation to 160Gy shows a major peak at 90 °C with a secondary, weak intensity peak along the high temperature region of the glow curve. The dose response of the 0.4% mole concentration of Dy doped on aluminium borate showed a linear response from 40 to 500 Gy. [Display omitted] •Solid state sintering technique was employed to synthesized the material.•Rare earth metals as dopant enhanced the TL property of aluminium borate.•High TL intensity of the materials have high optical absorbance.•Dose response was linear for Dy-doped aluminium borate.