Enhanced visible light emission from Co doped ZnS nanoparticles |
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Authors: | R Sarkar CS Tiwary P Kumbhakar AK Mitra |
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Institution: | aDepartment of Physics, National Institute of Technology, Durgapur, 713209, India |
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Abstract: | ZnS nanoparticles with Co2+ doping have been prepared at room temperature through a soft chemical route, namely the chemical co-precipitation method. The nanostructures of the prepared nanoparticles have been analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), selected-area electron diffraction (SAED), and UV-vis spectrophotometer. The sizes of as prepared nanoparticles are found to be in 1–4 nm range. Room-temperature photoluminescence (PL) spectrum of the undoped sample exhibits emission in the blue region with multiple peaks under UV excitation. On the other hand, in the Co2+ doped ZnS samples enhanced visible light emissions with emission intensities of ~35 times larger than that of the undoped sample are observed under the same UV excitation wavelength of 280 nm. |
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Keywords: | Cobalt doped zinc sulfide Nanoparticles Optical properties Photoluminescence |
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