Souadi, G.Hakami, O.Kaynar, U. H.Coban, M. B.Aydin, H.Madkhali, O.Zelai, T.2025-03-202025-03-2020240969-80431872-9800https://doi.org/10.1016/j.apradiso.2024.111529https://hdl.handle.net/20.500.14034/2466This study investigates the structural and photoluminescence (PL) characteristics of Tb3+-incorporated K3Y(BO2)(6) (KYBO) phosphors synthesized via a microwave-assisted sol-gel technique. X-ray diffraction (XRD) and Rietveld refinement confirmed the formation of a pure hexagonal phase, with lattice expansion due to Tb3+ doping. PL studies revealed strong green emissions centered at 541 nm, attributed to the D-5(4) -> F-7(5) transitions of Tb3+ ions, with the highest intensity observed at 5 wt% Tb3+. A decrease in emission was observed at higher concentrations due to concentration quenching. Temperature-dependent PL measurements revealed reverse thermal quenching enhancing PL intensity. Chromaticity analysis based on CIE 1931 coordinates showed stable green emission across all concentrations, with a maximum color purity of 89.74% observed for the KYBO:3 wt% Tb3+ sample. The results, along with reverse thermal quenching behavior observed between 470K and 550K, suggest that these phosphors exhibit excellent potential for lighting and display technologies.eninfo:eu-repo/semantics/closedAccessK3Y(BO2)(6)Tb3+Microwave-assisted sol-gel synthesisXRDPhotoluminescenceReverse thermal quenchingArticle10.1016/j.apradiso.2024.111529214Q2WOS:0013276421000012-s2.0-8520472057839332268Q2