Spectral and Luminescence Properties of Manganese Doped Sodium Lead Alumino Borosilicate Glass System

Na₂O-PbO-Al₂O₃-B₂O₃-SiO₂ glasses mixed with different concentrations of MnO (ranging from 0.3 to 0.9 mol %) was prepared by melt quenching technique. The samples were characterized by X-ray diffraction technique, Optical absorption and Photo luminescence technique. A prepared glass sample is confirmed by X-ray diffraction spectra. The optical absorption spectra of these glasses exhibited a predominant broad band peak at 21,052 cm^-1 (475 nm) is identified due to ⁶A_1g (S) → ⁴T_1g (G) octahedral transition of Mn²⁺ ion. From the spectral analysis the optical band gap (E_opt) and Urbach energy (ΔE) are evaluated. The emission spectra of Mn²⁺ doped titled glasses have shown single and broad emission band at about 600 nm assigned to electronic transition ⁴T_1g (G) → ⁶A_1g (S) displaying red emission upon excitation at 413 nm. Various principle physical properties were also evaluated.