Publication

Abstract : An intense reddish orange phosphor Na3Bi5(PO4)6:Pr3+ was produced via solid state reaction approach. PXRD and SEM investigations were used to examine the crystal structure and particle shape. When excited under UV light with a wavelength of 485 nm, the photoluminescence emission spectrum displayed the distinctive highest intensity peak at 602 nm which corresponds to the Pr3+ emission band. The CIE coordinates, x = 0.6128 and y = 0.3871 were located in the reddish orange region for Na3Bi5(PO4)6:xPr3+ (x = 0.04 mol%) phosphor. Thermoluminescence (TL) glow curve was obtained by irradiating beta radiation on Pr3+ (x = 0.04 mol%) doped Na3Bi5(PO4)6 phosphor and the corresponding peaks were located at 89 °C and 158 °C. Bleaching or preheating process was used to remove the low temperature peaks. The preheat temperature was optimized to 160 °C and used to locate the peak having the maximum peak intensity at 185 °C. Peak shape method (PS) and the variable heating rate method (VHR) were used to determine the activation energy (Ea) and frequency factor (s) of the peaks. Reusability and dose response of Na3Bi5(PO4)6: xPr3+ (x = 0.04 mol%) phosphor were studied for dosimetry application.