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Temperature effect on the electrical properties of pyrolytic MnO2 thin films prepared from Mn(C2H3O2)2·4H2O

Author

Listed:
  • Farid ul Islam, A.K.M.
  • Islam, R.
  • Khan, K.A.
  • Yamamoto, Yoshiyuki

Abstract

Spray deposited MnO2 thin films onto glass substrate were subjected to a post-deposition heat treatment and the effects of temperature on electrical transport properties were studied in details. The heating and cooling cycles of the samples are reversible after successive heat-treatments in air and vacuum. The films were polycrystalline in structure and the oxygen chemisorption–desorption process was found to play an important role in controlling the electronic properties. Various grain-boundary and energy band parameters were calculated by taking conventional extrinsic semiconductor theory and grain boundary trapping models into account. The samples were non-degenerate n-type semiconductors. The transport properties are interpreted in terms of Seto's model which was proposed for polycrystalline semiconducting films. The inter-crystallite boundaries of the thin films play an important role in the transport properties.

Suggested Citation

  • Farid ul Islam, A.K.M. & Islam, R. & Khan, K.A. & Yamamoto, Yoshiyuki, 2007. "Temperature effect on the electrical properties of pyrolytic MnO2 thin films prepared from Mn(C2H3O2)2·4H2O," Renewable Energy, Elsevier, vol. 32(2), pages 235-247.
    • Handle: RePEc:eee:renene:v:32:y:2007:i:2:p:235-247
    DOI: 10.1016/j.renene.2006.01.006
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