Synthesis and luminescence properties of Li₂BaSiO₄:Eu³⁺ phosphors

Abstract Novel red phosphors Li_2–xBa_1–xEu_x SiO₄ were synthesized using a high‐temperature solid‐state reaction, and their UV‐Vis luminescence properties as well as decay curves were investigated. The excitation spectra indicate that the Li_2–xBa_1–xEu_x SiO₄ phosphors can be effectively excited by near‐ultraviolet (∼393 nm) light, dovetailed nicely with the UV light‐emitting diodes (LED) chip. The optimum luminance phosphor Li_1.88Ba_0.88Eu_0.12SiO₄ shows red luminescence with a dominant ⁵D₀ → ⁷F₂ emission at about 615 nm and suitable chromaticity coordinates (0.639, 0.359), indicating that the phosphor may be a potential candidate for near‐UV InGaN‐based w‐LEDs. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)