Development of Orange-Emitting Sm2O3-Doped Tellurite Glasses Prepared for Solid State Lighting

• DOI: 10.55003/cast.2025.263917
• Publication Date: 2025-03-28T10:46:50Z
• Authors: Patarawagee Yasaka; Winut Wongwan; Kitipun Boonin; Warawut Sa-ardsin; Rungsan Ruamnikho...; Jakrapong Kaewkhao
• Keywords: Solid-State Lighting

A series of glass samples, with base composition (40-x) TeO2: 30B2O3: 20ZnO: 10Li2O, was modified by incorporating varying concentrations Sm2O3 (x = 0.00, 0.10, 0.50, 1.00, 1.50, and 2.00 mol%). X-ray diffraction analysis confirmed the amorphous nature prepared glasses. FTIR spectroscopy used to investigate structural arrangement glasses, revealing characteristic vibrational bands associated Te-O, B-O, Zn-O bonds. These provided insights into network's evolution changing content. The optical properties glasses were investigated through absorption photoluminescence studies. Absorption spectra, measured in 400-1800 nm range, displayed seven peaks attributed electronic transitions within Sm3+ ion. originated from 6H5/2 ground state various excited states. Photoluminescence analysis, at 403 nm, revealed a strong emission band centered 597 nm. This corresponded 4G5/2 → 6H7/2 transition Sm3+, responsible for orange luminescence. intensity increased increasing concentration up 1.00 mol%, after which quenching led decrease intensity. In conclusion, this study elucidates composition-structure-property relationships Sm2O3-doped TeO2-B2O3-ZnO-Li2O tunable suggests their potential as phosphors solid-state lighting applications, particularly LEDs.