Transformation of amorphous iron oxide thin films predeposited by spray pyrolysis into a single FeSe2-phase by selenisation
| Autor: | J. Ouerfelli, H. Ezzaouia, Brahim Bessais, J.C. Bernède, B. Ouertani, M. Saadoun |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Scanning electron microscope Analytical chemistry Iron oxide Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amorphous solid chemistry.chemical_compound Crystallinity Carbon film chemistry Phase (matter) Thin film Pyrolysis |
| Zdroj: | Solar Energy Materials and Solar Cells. 87:501-511 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2004.07.036 |
| Popis: | 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 ( α > 1 0 5 cm - 1 , λ 800 nm ). Surface scanning electron microscopy (SEM) observations show inhomogeneous films. Electrical conductivity of the as-prepared films was measured at high and low temperatures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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