Transformation of amorphous iron oxide thin films predeposited by spray pyrolysis into a single FeSe2-phase by selenisation |
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Authors: | B. Ouertani, J. Ouerfelli, M. Saadoun, B. Bessaï s, H. Ezzaouia,J.C. Bern de |
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Affiliation: | B. Ouertani, J. Ouerfelli, M. Saadoun, B. Bessaïs, H. Ezzaouia,J.C. Bernède |
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Abstract: | The present paper investigates a simple and non-toxic method to transform amorphous iron oxide pre-deposited by spray pyrolysis of FeCl3·6H2O (0.03 M)-based aqueous solution onto glass substrates heated at 350 °C into FeSe2 thin films. The amorphous iron oxide films were heat treated under a selenium atmosphere (10−4 Pa) at different temperatures for 6 h. X-ray diffraction (XRD) was used to investigate the structure of the obtained films. Single FeSe2-phase films having good crystallinity were obtained at a selenisation temperature of 550 °C. Optical analyses of the FeSe2 films obtained at 550 °C enabled us to deduce a large absorption coefficient (, ). Surface scanning electron microscopy (SEM) observations show inhomogeneous films. Electrical conductivity of the as-prepared films was measured at high and low temperatures. |
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Keywords: | Thin films Spray pyrolysis Iron oxide FeSe2 |
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