Luminescence properties of Dy3+, Sm3+ codoped 20SiO2-20CaO-60P2O5 glass

Luminescence and energy-transfer in xDy₂O₃–ySm₂O₃–20SiO₂–20CaO–60P₂O₅ (x = 0.3, 0.5, 0.8; y = 0.5, 1.0, 1.5) glasses were investigated. The glass samples were synthetized by conventional melt quenching method. The combined luminescence of Dy³⁺ and Sm³⁺ ions in phosphosilicate glass was systematically measured. When excited by 361 nm, 373 nm, and 400 nm excitation light, Dy³⁺ and Sm³⁺ ions can emit light simultaneously. The glass sample 0.8Dy₂O₃–0.5Sm₂O₃–20SiO₂–20CaO–60P₂O₅ under 373 nm excitation presents a white light emission (the color coordinates are x = 0.3386, y = 0.3359) in the CIE diagram, and the correlated color temperature (CCT) is about 6000 K. The decay time test shows that there may be energy transfer from Dy to Sm. The Dy³⁺, Sm³⁺ codoped 20SiO₂–20CaO–60P₂O₅ glass will be further studied as a white light source in future.