OPTICAL PROPERTIES OF CO2+-DOPED ZNS NANOPARTICLES SYNTHESIZED USING REVERSE MICELLE METHOD

Rahizana Mohd Ibrahim, Masturah Markom, Kamal Firdausi Abd Razak

Abstract


Zinc sulfide is a luminescence materials with important application that exist either as a bulk material or in the form of nano crystal. Doped ZnS nanoparticles form a new class of luminescence materials and provide a new physics to control the particles size. This paper concerns detailed structural, spectroscopic and crystal field studies of ZnS nanoparticles, both pure and doped with CO2+ ions that successfully synthesized at room temperature. Zn1-xCoxS (x =0.00,0.02,0.04,0.06,0.08 and 0.10) was prepared by reverse micelle method using sodium bis(2-ethylhexyl) sulfosuccinate (AOT) as surfactant. The effect of ion doping on the optical characterization, structure and morphology of ZnS:Co2+ were investigated using ultraviolet-visible (UV-vis) spectroscopy, photoluminesence (PL) spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM)  and transmission electron microscopy (TEM). EDAX spectra confirmed the incorporation of ion dopants into ZnS crystal structure, and XRD results showed that ZnS:Co2+ nanoparticles crystallized in a zinc blende structure. The particle size of all of samples ranged from 2 nm to 3 nm. In the PL emision, two peaks were observed at 460 and 608nm that a new peak for Co2+ doped ZnS ever reported. The Co2+ doped ZnS nanoparticles using reverse micelle method showed that there is considerable change in the photoluminescence spectra of the ZnS nanoparticle doped Co2+


Keywords


Nanoparticles, ZnS:Co2+, reverse micelle method, quantum confinement effect, photoluminescence

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References


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DOI: http://dx.doi.org/10.11113/jt.v79.11321

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