Abstract
Borophosphate (BP) glass having composition of 50P2O5 - 10B2O3 - 20ZnO - 20PbO - xEr2O3 in mole %, where x= (0, 0.005, 0.01, 0.015, 0.02, 0.025 wt. %) were prepared by the melt quench method. X-ray analysis was performed to confirm the amorphous structure of the glass network. All glasses exhibit good transparency as observed from the naked eye. UV-VIS-NIR absorption spectroscopy was performed between 300 nm–1600 nm to probe the absorption bands of prepared samples. Ten major absorption peaks were appeared due to the excitation from ground level 4I15/2 to various excited states. The absorption spectrum was then used to calculate the direct and indirect band gap energy that lies within the range of 3.98 eV–4.32 eV and 3.86 eV–4.23 eV respectively. Refractive index and density were calculated in the range of 2.125–2.197 and 3.923–4.231 g/cm3 respectively. Judd-Ofelt (JO) theory was applied to investigate the radiative properties. JO intensity parameters Ωt (t = 2, 4, 6) were calculated by least square fitting method. The result shows that studied samples are suitable candidates for green light emission solid-state laser device.