Structural and optical studies on various concentrations of Dy3+-doped lead fluoro-borotellurophosphate glasses for white light and solid-state light applications

• Published in: Journal of materials science. Materials in electronics 2023, Vol.34 (3), p.212, Article 212
• Main Authors: D’Silva, A. Josuva, Maheshvaran, K., Lourduraj, A. J. Clement, Rayappan, I. Arul
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical composition; Chemistry and Materials Science; Chromaticity; Cross-sections; Dysprosium; Emission analysis; Fluorides; Functional groups; Laser applications; Light; Light emission; Materials Science; Mathematical analysis; Optical and Electronic Materials; Optical properties; Parameters; Photoluminescence; Stimulated emission; Transition probabilities; White light
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-09601-y

Dysprosium-doped lead fluoro-borotellurophosphate glasses with the chemical composition of (25-x) H 3 BO 3  + 10TeO 2  + 25P 2 O 5  + 10PbO + 08ZnF 2  + 12NaF + 10Li 2 CO 3  + xDy 2 O 3 (x = 0.1, 0.25, 0.5, 1 & 1.5) were prepared by melt quenching technique. The structural and optical properties were studied to understand the behavior of Dy 3+ ions with the local environment for photonic applications. The structural investigations were carried out through XRD, FTIR and SEM with EDS analysis. The absence of sharp peaks in the XRD pattern confirms the non-crystalline nature of the prepared glasses. The various functional groups of the composition were confirmed through FTIR. The surface morphology and the distribution of elements presented were observed through SEM with EDS. The optical behaviors were studied through UV–Vis-NIR, photoluminescence and chromaticity analysis. The JO intensity parameters Ω λ (λ = 2, 4, 6) were calculated, and the higher Ω 2 value of BTPPZNL0.1D glasses indicates the asymmetry around Dy 3+ ions. The radiative parameters like emission band position (λ p ), effective band width (Δλ eff ), radiative transition probability (A), stimulated emission cross section σ p E , and calculated and experimental branching ratios (β R ) were determined from emission analysis. The higher value of stimulated emission cross section σ p E for 4 F 9/2  →  6 H 13/2 transition suggested that BTPPZNL1.5D glass is suitable for laser application. The evaluated color coordinates of prepared glasses represent the capacity of white light emission under UV excitation.