Structural, Spectroscopic, and Luminescent Properties of Dy ³⁺ ‐Doped Multicomponent‐Based Borosilicate Glasses for White‐Light Emission Applications

A new series of Dy 3+ ‐doped borosilicate–magnesium–cesium–carbonate–lead chloride–sodium chloride (BSMCPNDy) glasses was synthesized using the conventional melt‐quenching technique to investigate their structural and optical properties. The incorporation of Dy 3+ ions into the host matrix was confirmed through FTIR spectra, which revealed the formation of BO₃/BO₄ structural units and modifications in the silicate network. Optical absorption and photoluminescence (PL) measurements were performed to explore the electronic transitions and luminescence behavior of Dy 3+ ions. The Judd–Ofelt intensity parameters followed the trend Ω₂ > Ω₄ > Ω₆, suggesting an asymmetric and covalent environment around Dy 3+ ions in the glass network. Under 349‐nm excitation, the emission spectra exhibited prominent bands at 482 nm ( 4 F₉/₂ → 6 H₁₅/₂), 575 nm ( 4 F₉/₂ → 6 H₁₃/₂), and 663 nm ( 4 F₉/₂ → 6 H₁₁/₂), corresponding to blue, yellow, and red emissions. The 0.5 mol% Dy 3+ ‐doped sample displayed the highest emission intensity, whereas concentration quenching at higher dopant levels resulted from energy transfer and cross‐relaxation processes. The evaluated branching ratio, stimulated emission cross‐section, fluorescence lifetime behavior, and color coordinates suggest that the optimized BSMCPNDy composition is a promising candidate for white‐light–emitting diodes, solid‐state laser media, and photonic devices.