High conductivity nickel oxide thin films by a facile sol-gel method

Wen Guo, K. N. Hui, K. S. Hui

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Abstract

Li-doped NiO thin films (Li:NiO) were deposited on glass substrates using a facile sol-gel method. The effects of Li doping concentration on the structural, electrical and optical properties of Li:NiO films were examined. The structural properties of Li:NiO films were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy. XRD revealed the Li:NiO films to have a polycrystalline bunsenite structure. The surface morphology of the Li:NiO films exhibited nanocrystalline grains with a randomly oriented morphology. The resistivity decreased substantially to 1.33 k Ω cm at 0.11 mol%, which is one order of magnitude lower than that of the undoped NiO film. The mean transmittance decreased from 70% to 60% with increasing Li doping concentration from 0.02 mol% to 0.19 mol%.

Original languageEnglish
Pages (from-to)291-295
Number of pages5
JournalMaterials Letters
Volume92
Early online date6 Nov 2012
DOIs
Publication statusPublished - 1 Feb 2013

Keywords

  • Li-doping
  • Mobility
  • NiO
  • Sol-gel
  • Transmittance

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