PMID: 19916436Nov 18, 2009Paper

Growth of nano size grains in CuInSe2 thin films using E-beam deposition technique

Journal of Nanoscience and Nanotechnology
E AhmedW Ahmed

Abstract

Crystalline defects, such as the density of voids, grain boundaries and dislocations in copper based ternary/multinary semiconducting compounds/alloys such as CulnSe2 and Culn(x)Ga(1-x)Se2 absorber layers depend on the fabrication conditions and determine to a large extent the efficiency of photo-voltaic devices. The material properties, however, can be improved significantly by using the optimized deposition conditions. This paper reports the results of studies carried out on growth and characterisation of CulnSe2 thin films. Coatings of thickness less than one micron were grown using an electron-beam evaporation technique onto glass slides at various substrate temperatures. The structure, surface morphology and electro-optical properties of the films have been investigated using a number of analytical techniques. The effects of the substrate temperature deposition rate, deposition time and type of the target material (a loose powder and single crystal) on the properties of the films have also been examined. In the as-grown films, X-ray diffraction (XRD) analysis revealed a strong preferred orientation with the (112) plane parallel to the substrate. Results from energy dispersive analysis with X-rays (EDAX) indicated a deficie...Continue Reading

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