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Studies of Iron Diselenide Thin Films Deposited by Thermal Evaporation

Auteurs : A. Kassaa, N. Benslim
Année : 2016
Domaine : Sciences des matériaux
Type : Communication
Conférence: 7th African Conference on Non Destructive Testing ACNDT 2016 & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : FeSe, Solar energy materials, Mechanical Alloying, Thermal evaporation, Thin films

Résumé :

Iron diselenide (FeSe) composite thin films have been formed onto ultrasonically and chemical cleaned glass substrates by thermal evaporation technique from powder. This latter was prepared by mechanical alloying. The structural evolution of a binary alloy with nominal composition FeSe2 prepared by ball milling was investigated as a function of milling time. The structural properties of the powders and the films were ascertained by x-ray diffraction method. The XRD patterns showed that for milling times up to 1 h, the FeSe phase is formed. The band gap E estimated from optical absorption data was between 0.8–1.01 eV, depending on preparation conditions such as substrate temperature. High optical absorption coefficients (> 104 cm− 1g) were found.