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Title of Journal: J Mater Sci Mater Electron

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Abbravation: Journal of Materials Science: Materials in Electronics

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Springer US

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DOI

10.1007/bf01761435

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1573-482X

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Effect of Co doping on the structural and optical

Authors: K Nomita Devi W Joychandra Singh K Jugeshwar Singh
Publish Date: 2017/02/14
Volume: 28, Issue: 11, Pages: 8211-8217
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Abstract

Co doped ZnO nanospindles with general compositional formula Zn1−xCoxO 0 ≤ x ≤ 01 are prepared by wet chemical co precipitation method The samples are characterized for its structural morphological compositional and optical properties by Xray diffraction XRD Scanning electron microscope SEM Energy dispersive analysis of Xrays EDAX transmission electron microscope TEM Fourier transform infrared spectroscopy FTIR and UV–Vis absorption spectroscopy XRD patterns confirm wurtzite structure with no secondary phases for pure and Co doped ZnO samples The crystallite size of the samples calculated from the XRD patterns are found to be in the range of 22–31 nm SEM images show that the particles are spindle shape with an average length and diameter 660 and 295 nm respectively The average particle size as calculated from TEM image are found to be in the range of 28–40 nm EDAX spectra confirms the presence of Co in the samples with expected stoichiometry FTIR results give information about the nature of chemical bonding and incorporation of the dopants into the ZnO lattice UV–Visible spectra show well excitonic absorption peaks and the band gap energies are estimated to values between 315–354 eV The variation of band gap energy is discussed

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