Spectroscopic properties of Dy3+ ions in PbO-Sb2O3 glasses mixed with MgO/CaO/SrO. (2018)

• Record Type: Journal Article
• Authors: Ravi Kumar, Valluri; Nagaraju, G.; Vidya Elizabeth, M.; Udaya Keerthi, D.
• Is Part Of: Materials today. Volume 5:Number 13(2018)Part 1
• Page Start: 26372
• Page End: 26379
• Publication Date: 2018
• Subjects: Dy3+ glasses -- Modifier oxides -- Luminescence quenching -- Y/B ratio; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2018.08.089
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: PbO-Sb2 O3 -MgO/CaO/SrO: Dy 3+ glasses were synthasized by using the melt quenching Technique. The influence of modifier oxide on the optical and luminescence characteristics of Dy 3+ ions has been investigated. Using the intensities of various absorption bands of Dy 3+ ions, the Judd-Ofelt parameters Ω2, Ω4 and Ω6 have been evaluated. The luminescence spectra (λexc = 348 nm) exhibited three principal emission bands in the visible region corresponding 4 F9/2 → 6 H15/2, 6 H13/2, 6 H11/2 various radiative properties like transition probability A, branching ratio βr and the radiative life time τr for various emission levels of Dy 3+ ions have been evaluated. The values of these parameters were found to be influenced by modifier oxides. Among the three modifier oxides, the glasses mixed with CaO glasses have low non– radiative losses among the three mixed glasses are found to be reson, CaO mixed glasses exhibited the highest luminescence efficiency.