Photoluminescence properties of novel BaGd2Si3O10:RE2+/3+ (RE = Eu or Ce) phosphors with trichromatic emission for white LEDs

Abstract

Novel phosphors BaGd₂Si₃O₁₀:RE^2+/3+ (RE = Eu or Ce) were designed and prepared by a solid state reaction. The crystal structure was characterized by X-ray diffraction. The optical band gap was estimated by the diffuse reflectance spectrum. The photoluminescence properties were investigated and the results indicate that under ultraviolet light excitation, BaGd₂Si₃O₁₀:Eu³⁺, BaGd₂Si₃O₁₀:Eu²⁺ and BaGd₂Si₃O₁₀:Ce³⁺ phosphors show red, green and blue emission, respectively. The trichromatic emission available by doping different rare earth ions proves that BaGd₂Si₃O₁₀ should be a promising host material for phosphors in white LEDs.