Preparation and characterization of iron oxide thin films by spray pyrolysis using methanolic and ethanolic solutions |
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Authors: | J.D. Desai |
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Affiliation: | Eco-Nano Research Centre, Korea Institute of Science and Technology, P.O. Box No. 131, Chongryang, Seoul 130-650, Republic of Korea |
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Abstract: | Iron oxide thin films have been obtained by spray pyrolysis using 100% methanolic and ethanolic solutions of iron tri-chloride. The films were deposited onto ITO-coated glass substrates. The preparative conditions have been optimized to obtain compact, pin-hole-free and smooth thin films which are adherent to the substrate. The structural, morphological and compositional characterizations have been carried out by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. The films deposited using ethanolic solution results into pure hematite; α-Fe2O3 thin films, however, films deposited using methanolic solution consists of hematite and maghemite-c phases of iron oxide. The films are nanocrystalline with particle size of 30-40 nm. The optical absorbance of the film was of the order of 105 cm−1. The optical band gap of films was found to be 2.26 and 2.20 eV for the films deposited using methanolic and ethanolic solutions, respectively. |
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Keywords: | Iron oxide Thin Film Spray pyrolysis Preparation and characterization |
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