Physico-chemical, optical and electrochemical properties of iron oxide thin films prepared by spray pyrolysis

  • Dghoughi L
  • Elidrissi B
  • Bernède C
 et al. 
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Abstract

Iron oxide thin films were prepared by spray pyrolysis technique onto glass substrates from iron chloride solution. They were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and (UV-vis) spectroscopy. The films deposited at Ts≤ 450 °C were amorphous; while those produced at Tsub= 500 °C were polycrystalline α-Fe2O3with a preferential orientation along the (1 0 4) direction. By observing scanning electron microscopy (SEM), it was seen that iron oxide films were relatively homogeneous uniform and had a good adherence to the glass substrates. The grain size was found (by RX) between 19 and 25 nm. The composition of these films was examined by X-ray photoelectron spectroscopy and electron probe microanalysis (EPMA). These films exhibited also a transmittance value about 80% in the visible and infrared range. The cyclic voltammetry study showed that the films of Fe2O3deposited on ITO pre-coated glass substrates were capable of charge insertion/extraction when immersed in an electrolyte of propylene carbonate (PC) with 0.5 M LiCLO4. © 2006 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Electrochemical properties
  • Spray pyrolysis
  • Structure
  • Thin films
  • α-Fe2O3

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