Structural Characterization, Raman Spectroscopy and FTIR Spectroscopy Studies of Pr3+ Doped Tellurium Bismuth Borate Glasses

Abstract

A set of composition-based undoped and Pr³⁺-doped Tellurium Bismuth Borate glasses 20TeO₂: (30-X)Bi₂O₃: 50B₂O₃: XPr₂O₃ (where X= 0, 0.1, 0.3, 0.5, 0.7 mol%) have been fabricated via standard melt quenching technique. All of the manufactured glasses were made of completely amorphous material, according to X-ray diffraction (XRD) patterns. The refractive index, density, optical absorption, FTIR and Raman spectroscopy have been applied to investigate the structural and optical properties. FTIR spectral measurements have been utilized to identify the network vibration of Pr₂O₃ doped Tellurium glasses. FTIR reveals symmetrical stretching vibrations of Te-O in TeO₄ as well as B-O stretching (BO₃) units. Signals in the FTIR mainly observed around 1032 cm^-1,1180 cm^-1, 1349 cm^-1, 1395 cm^-1 and 1501 cm^-1 while Raman scattering peaks are located at 436 cm^-1, 542 cm^-1, 770 cm^-1, 940 cm^-1, 1028 cm^-1, 1232 cm^-1 and 1361 cm^-1. Both reflective index and density increases with increasing rare earth ion concentration.