Optical Absorption of Er~(3+) doped Lithium Lead Borate glasses

摘要

A new glass system Lithium lead borate doped with erbium trioxide were perpared using conventional melt quenching method. The amorphous nature of the glass samples were confirmed by XRD spectrum. The density of these glass were measured using Archmides principle, the values lie in the range from 4.27 to 4.76 g/cm~(-3). The corresponding molar volumes are calculated and the values are in the range of 23.81 to 26.17 cm~(-3). Absorption spectra were recorded in the wavelength range of 200nm to llOOnm, for the prepared glass samples. The optical direct and indirect energy band gaps were measured, the values are in the range of2.875 to 3.254 eV and 2.25 to 2.81 eV respectively. Photoluminescence technique was employed to study the luminescent property of the prepared glasses excited at 380nm, emission spectra were recorded and analyzed.