The effect of Dy3+ doping on the thermoluminescence properties of Ba2SiO4

The thermoluminescence (TL) properties of barium silicate phosphor, Ba2SiO4:%3Dy(3+) synthesized by using hydrothermal method were investigated and presented in detail. The crystallographic structure of Ba2SiO4:%3Dy(3+) was determined by conventional x-ray diffraction technique and the results showed that the sample was grown in orthorhombic phase with Pmcn (62) space group (PDF: 01-077-0150). The excitation spectra of Ba2SiO4:Dy3+ were measured in the wavelength range of 220-400 nm and the spectra showed that there were several excitation bands in the sample. The CIE chromaticity coordinates were also calculated from emission spectra for Dy3+-doped Ba2SiO4. In order to calculate the kinetic parameters of the sample the additive dose, peak shape and computerized glow curve deconvolution methods were used. It was found that Ba2SiO4:Dy3+ was composed of five general order TL glow peaks. The fading characteristics of the sample were also studied over a period time. At the end of the planned storage times, the normalized TL peak area of Ba2SiO4:Dy3+ reduced 60% of its original value.