Improved luminescence properties of Sc0.73Y0.2VO4:Eu0.073+ phosphor by codoping with Bi3+, PO43− and BO33−

Bi3+, PO43− and BO33− doped Sc0.73Y0.2VO4:Eu0.073+ phosphors were synthesized by solid state reaction at 1200 °C. The structure, morphology and luminescence properties were investigated. The synthesized phosphors show narrow particle distribution with average size around 2 μm. Under 365 nm excitation, integrate emission intensity increases after doping with Bi3+, PO43− and BO33−. The optimal doping concentrations are 1%, 20%, 10% for Bi3+, PO43− and BO33−, respectively. The thermal stability is greatly improved, especially for BO33− doped sample, whose intensity is about 92% of its original intensity even at 200 °C.