Effects on inter-substitution of SrO to Li2O in borate glass systems doped with Sm3+ ions

The influence of alkali/alkali earth elements like lithium and strontium on optical properties of 60B2O3 - xLi2O - (40 – x) SrO - 0.3Sm2O3 (x=20, 15, 10 and 5 mol %) are reported. Concentration variation of Li2O and SrO alters the structure of the glass network which endow with more non-bridging oxygen's (NBO's) that could affect the optical properties. The glass samples are prepared by melt quenching technique. The non-crystalline nature of the glasses was confirmed through XRD. The structural and optical properties were understood by spectroscopic techniques through UV-VIS-NIR, FTIR and Photoluminescence. It is observed that, the density of glasses increase with increase in the strontium concentration up to 30 mol%. Optical Band gap was evaluated. The IR study shows the presence of various borate groups in the wavelength range between 400 cm−1 to 1600 cm-1. The photoluminescence spectra consists of three prominent emission bands which makes these glasses compatible for reddish orange solid state optoelectronic devices.