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Photoluminescence Studies of H2O2 Treated Chemically Synthesized ZnO Nanostructures

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Author Affiliations

  • 1Assam University (Diphu Campus), Diphu - 782 460, INDIA
  • 2Guwahati College, Guwahati - 781 022, INDIA

Res.J.chem.sci., Volume 3, Issue (9), Pages 45-50, September,18 (2013)

Abstract

Spherical ZnO nanoparticles dispersed in PVA matrix were synthesised through chemical bath deposition method. The HRTEM images confirm the formation of wurtzite ZnO quantum dots. The PL spectra obtained were deconvoluted in order to study the defects due to impurities. Peak positions obtained through de-convolution exhibit the energy levels in the long wavelength regions. The defects such as oxygen vacancy, oxygen antisite and Zn interstitial are associated with emission in the visible region. The band edge transition peak is prominent in PL spectra. The ZnO quantum dots exhibit strong UV emissions at 3.20eV and 3.16eV while other emissions in the range 3.00eV -- 1.77eV for the prepared samples.

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