Investigation of structural, optical and luminescence characteristics of Dy3+-embedded alkaline heavy metal zincfluoroborophosphate glasses

Dy3+-embedded glasses have been widely considered for light-emitting diode applications as well as optical display devices. Based on this importance, the present study investigates the structural and photoluminescence characteristics of Dy3+-embedded zincfluoroborophosphate glasses. These glasses with molar composition of 35H3BO3 + 10NH4H2PO4 + 25BaCO3 + (5 − N)La2O3 + 25ZnF2 + NDy2O3 (BPBaLaZfDyN), where N = 2.0, 1.0, 0.5, 0.1, and 0.05, were fabricated by the melt and quenching procedure. FTIR spectra show the existence of fundamental groups such as BO3 and BO4 units, phosphates as well as OH groups. The criterion of metallization, optical electronegativity and basicity of the fabricated glasses was investigated and presented. The three phenomenological Judd–Ofelt (JO) parameters were estimated with the aid of optical absorption of oscillator strengths by using well-known theoretical JO model and in turn estimated the essential radiative characteristics of excited fluorescent states of Dy3+ ion. Dy3+:BPBaLaZfDy glasses reveal the luminescence levels at 840 nm (infrared: 4F9/2 → 6H7/2), 754 nm (infrared: 4F9/2 → 6H9/2), 664 nm (weak red: 4F9/2 → 6H11/2), 485 nm (blue: 4F9/2 → 6H15/2) and 576 nm (yellow: 4F9/2 → 6H13/2), exciting at 350 nm. Among different concentrations, 0.5 mol