alexa Effect of Mn Doping on Optical Properties of ZnO Nanop
ISSN ONLINE(2319-8753)PRINT(2347-6710)

International Journal of Innovative Research in Science, Engineering and Technology
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Research Article

Effect of Mn Doping on Optical Properties of ZnO Nanoparticles

Binapani Goswami1 and Ranjit Singha2
  1. Research Scholar, Department of Physics, Assam University, Diphu Campus, Karbi Anglong, Assam, India
  2. Professor, Department of Physics, Assam University, Diphu Campus, Karbi Anglong, Assam, India
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Abstract

In the present work the synthesis of undoped and Mn- doped ZnO nanoparticles by simple coprecipitation method is reported. The nanoparticles were characterized by transmission electron microscopy (TEM), Xray diffraction (XRD), UV-Vis spectroscopy and Photoluminescence (PL) spectroscopy for their structural and optical properties. X-ray diffraction data revealed the formation of hexagonal wurtzite phase for both undoped and Mn-doped nanoparticles. The mean crystallite size as obtained by Debye-Scherrer formula for undoped and doped ZnO nanoparticles of different concentrations are 26.64 nm, 21.66 nm, 23.60 nm and 22.31 nm respectively. The broadening in the XRD patterns clearly indicates the presence of very small nanocrystals. A linear decrease in the band gap is observed with increase of doping percentage. The room temperature PL spectra reveal that all the particles have a high purity with perfect crystallinity; however some crystal defects (vacancy, interstitial etc) are also present.

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