Author
Abstract
In this work we report the synthesis of CaWO4 pure and doped by various concentration of Eu 3+ by solid state method. Crystallinity and formation of as-synthesized phosphors were confirmed by XRD technique. PL emission of the Eu 3+ activated as-synthesized phosphors shows the strong red emission at 619 nm which corresponds to the characteristic transition 5 D0 → 7 F2 of Eu 3+ ion at excitation wavelength 273 nm. TL glow curve of Eu 3+ activated CaWO 4 shows the two glow peaks was observed at 400K and 500K whereas undoped CaWO4 shows only single peak observed at low temperature (354K). Doping effect on TL glow curve was discussed. Glow curve of Eu 3+ activated were fitted to five peaks which were analyzed and trap parameter were calculated by using Chens’ method, and the dose response curve shows the phosphor is fairly sensitivity to lower dose also. Thus reported phosphor can be applicable in LED and environmental dosimetry.
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