A novel narrow band UV-B emitting phosphor-YPO₄:Sb³⁺,Gd³

【摘要】 YPO₄ phosphors single-doped with Sb³⁺ or Gd³⁺ and co-doped with Sb³⁺ and Gd³⁺ were prepared by a solid-state reaction method. The phase purity, morphology, photoluminescence excitation and emission properties of the prepared phosphors were investigated. The results showed that Sb³⁺ could sensitize Gd³⁺ in the co-doped phosphors which made the phosphors excitable by short-wave ultraviolet（UV） at a wavelength between 220 and 260 nm. Under 253.7 nm excitation, the co-doped phosphors Y_1–x–y PO₄: Sb³⁺x,Gd³⁺y showed strong emission of Gd³⁺ at a wavelength of 312 nm whose intensity changed with the doping concentrations of Gd³⁺ and Sb³⁺. The optimized Y_0.77PO₄:Sb³⁺0.07,Gd³⁺0.16 phosphor showed an intensity comparable to commercial LaPO₄:Ce phosphor（UVB-315）, making it a potential candidate for mercury low-pressure discharge narrow-band UV-B emitting lamps.更多还原

【Abstract】 YPO₄ phosphors single-doped with Sb³⁺ or Gd³⁺ and co-doped with Sb³⁺ and Gd³⁺ were prepared by a solid-state reaction method. The phase purity, morphology, photoluminescence excitation and emission properties of the prepared phosphors were investigated. The results showed that Sb³⁺ could sensitize Gd³⁺ in the co-doped phosphors which made the phosphors excitable by short-wave ultraviolet（UV） at a wavelength between 220 and 260 nm. Under 253.7 nm excitation, the co-doped phosphors Y_1–x–y PO₄: Sb³⁺x,Gd³⁺y showed strong emission of Gd³⁺ at a wavelength of 312 nm whose intensity changed with the doping concentrations of Gd³⁺ and Sb³⁺. The optimized Y_0.77PO₄:Sb³⁺0.07,Gd³⁺0.16 phosphor showed an intensity comparable to commercial LaPO₄:Ce phosphor（UVB-315）, making it a potential candidate for mercury low-pressure discharge narrow-band UV-B emitting lamps.更多还原