Abstract
Polycrystalline KMgSO 4Cl:Eu and Na 5(PO 4)SO 4:Ce phosphors prepared by a wet chemical method have been studied for its photoluminescence (PL) and thermoluminescence (TL) characteristics. The TL glow curve of the compound has a prominent peak at 200 °C and may be useful for TL study. TL sensitivity of the KMgSO 4Cl:Eu phosphor is found to be 1.7 times less than that of TLD—CaSO 4:Dy. The presence of bands at around 420, 435 and 445 nm in the PL emission spectra of the phosphor suggests the presence of Eu 2+ in the host compound. Moreover a TL glow curve of the Na 5(PO 4)SO 4:Ce gives a better understanding of the TL mechanism (peaks at 271 and 310 °C) involved in the concerned phosphor. The PL emission spectra are observed at 382 nm for the various concentrations. In this paper we report PL and TL characteristics of KMgSO 4Cl:Eu halosulphate and Na 5(PO 4)SO 4:Ce phosphate sulphate phosphors first time.
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