Systematic exploration of properties, band gap energies and precise optical transition in ZnO–TeO2–P2O5–B2O3– Dy2O3–Sm2O3 glasses

Abstract

Herein, a fresh glass host with definite chemical composition of (49.0-x)B₂O₃-10P₂O₅-30TeO₂-10ZnO-1Dy₂O₃-xSm₂O₃ (0.0 ≤ x ≤ 1.5, mol%) was made through melt-quenching method. The effects of B₂O₃/Sm₂O₃ swapping on the physical and optical properties of the as-produced glasses was analytically inspected. The glass densities, deduced via Archimedes rule, were observed to be increasing while the mol v ar volume decline. Besides, the absorption spectral data monitored at 300–1800 nm region was used to determined various optical parameters. Further, three legendary models including, Tauc's, ASF (absorption spectral fitting) and DASF (derivation of ASF) were employed for deducing the energy band gap together with refractive indices. Midst the aforesaid models, scrutiny from DASF publicized exact optical transition index, m $\approx$ 0.5, affirming direct band gap energy in the present glasses. Moreover, other relevant optical quantities had been explored. To sum up, the achieved results buttressed the efficacy of the present glasses in the field of optoelectronics.