Abstract
In this work we synthesized undoped ZnS and ZnS:Ni nanoparticles by a simple chemical method, namely the chemical precipitation method. The structure and optical properties of the prepared samples were characterized using X-ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM), UV-Vis-NIR Spectrophotometer and Fluorescence spectroscopy. XRD patterns showed that the ZnS and ZnS:Ni nanoparticles have zinc blende structure with the crystallite sizes of about 6-10 nm range. The value of optical band gap has been found to be in range 4.88- 3.93 eV. Room temperature photoluminescence (PL) spectrum of the undoped sample exhibits emission in the blue region with multiple peaks under UV excitation. Ni2+ doped ZnS samples visible light emissions under the same UV excitation wavelength of 310 nm.
Original language | English |
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Pages (from-to) | 15-20 |
Number of pages | 6 |
Journal | Journal of Ovonic Research |
Volume | 8 |
Issue number | 1 |
State | Published - 2012 |
Externally published | Yes |
Keywords
- Band gap
- Nanoparticle
- Optical absorption
- Semiconductor
- UV-Vis