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Synthesis of ZnS:Tm3+ Nanoparticles by the Polyol Method

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Document pages: 7 pages

Abstract: In thiswork, the synthesis of undoped and Tm-doped ZnS nanoparticles is successfullycarried out by the polyol method. From XRD analyses, it was confirmed that bothtypes of particles possess the cubic zinc blend structure of the ZnS, and thatthe structure is not altered by doping. The crystallite size computed by theScherrer equation is about 9 ± 1 nm. From photoluminescence analyses, theresults show that the excitation spectrum has two excitation peaks at 304 nmand 356 nm; by exciting at 304 nm, a strong blue emission is observed at 420nm, while exciting at 356 nm the characteristic Tm transition 1G4 → 3H6 is observed at 417 nm. By doping with Tm ions, the emissioncolor changes from pure blue to sky according to the change in CIE coordinatesfrom x = 0.15, y = 0.015 to x = 0.18, y = 0.17, respectively.

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