The Photoluminescence Characteristic of Ba2-xSrxSiO4:Eu Phosphor Particles Prepared by Spray Pyrolysis

Ba2-xSrxSiO4:Eu2+ phosphor particles with the high photoluminescence (PL) intensity under long wavelength ultraviolet (UV) were prepared by spray pyrolysis. The photoluminescence, morphological and crystalline characteristics of Ba2-xSrxSiO4:Eu2+ phosphor particles prepared by spray pyrolysis were investigated. Ba2-xSrxSiO4:Eu2+ phosphor particles prepared by spray pyrolysis had various colors from bluish green to yellow by changing the ratio of barium and strontium of the host material. In case of x=0, the main emission peak of Ba2SiO4:Eu2+ phosphor was 500 nm. In case of x=2, the main emission peak of Sr2SiO4:Eu2+ phosphor was 554nm. Ba2-xSrxSiO4:Eu2+ phosphor particles obtained by spray pyrolysis had spherical shape and hollow structure. On the other hand, the post-treated Ba2-xSrxSiO4:Eu2+ phosphor particles had large size and irregular shape. The Ba1.488Sr0.5SiO4:Eu0.0122+ phosphor particles had the maximum PL intensity after post-treatment at temperature of 1,200 oC for 3h under reduction atmosphere.