Physical studies on the enhancement of photoluminescence properties for blue BaAl2Si2O8 : Eu2+ phosphors via LPP method with addition of silicate concentrations

Abstract

BaAl2Si2O8: Eu2+ + xSiO(2) (x = 0, 1, 2 and 3) has been synthesized with phosphors via novel liquid phase precursor (LPP) method. The best crystalline BaAl2Si2O8 : Eu2+ phosphor could not be synthesized as the calcination temperature is inadequate fully to crystalize the phosphor leading to the crystal and amorphous. Albeit, the firing temperature is insufficient so as to form the fine crystal, the added excess SiO2 could act as an additive for the crystallization of the phosphor. As a function of SiO2, the size of the crystal has been augmented and formed fine crystals with the concentration of added SiO2. Moreover, the added excess SiO2 makes SiOC : Eu2+ phosphor as a deep blue illumination at 440 nm. Photoluminescence intensity of the phosphors is increased continuously by the addition of SiO2 heretofore x = 3. In the present investigation, an attempt has been made to synthesize and observe carefully for photoluminescence properties with regard to the crystalline structure, optical property and surface morphology.