Optical and physical properties of europium doped lithium potassium borate glass

Abstract

Borate glass is widely used in many scientific studies. By using melt-quenching technique five samples of lithium potassium borate (LKB) doped with different concentration of europium oxide (Eu2O3) were prepared. To investigate the influence of dopant on the optical and physical characteristics of the glass, X-ray Diffraction and photoluminescence analyses were performed. The amorphous nature was confirmed by X-ray diffraction. The physical parameters of the glass which was doped by different oxidation state have been analyzed. These parameters involved are density, molar volume, ion concentration, inter-nuclear distance and Polaron radius. The exchange in the concentration of Eu+3 indicated the influence of Eu as a dopant on the photoluminescence emission of LKB glasses. The photoluminescence emission spectrum of LKB:Eu+3were due to the transition of Eu3+ from5D0-7Fr (r =1, 2, 3 and 4). The luminescence studies showed four peaks (590 nm, 613 nm, 650 nm, and 698 nm) for all samples excluding the pure sample. The glow curve exhibits single peak at 164 ºC. We establish that the proposed TL dosimeter at 0.5 mol% of Eu3+ has been observed to be 20 times less sensitive than TLD-100.