Effect of annealing on the structural and optical properties of InSe bilayer thin.pdfVIP

Vacuum 85 (2011) 820e826 Contents lists available at ScienceDirect Vacuum journal homepage: www.els /locate/vacuum Effect of annealing on the structural and optical properties of InSe bilayer thin films P. Matheswaran, R. Saravana Kumar, R. Sathyamoorthy* PG and Research Department of Physics, Kongunadu Arts and Science College, Coimbatore, Tamilnadu 641 029, India a r t i c l e i n f o a b s t r a c t Article history: InSe bilayer thin films with different thickness were prepared on to a glass substrate by sequential Received 1 June 2010 thermal evaporation. Preparation and post deposition treatment conditions were optimized in order to Received in revised form achieve effective bilayer mixing. The influence of bilayer film thickness and annealing temperature on 20 November 2010 the structural and optical properties was investigated. The prepared films were characterized by X-ray Accepted 14 December 2010 diffraction analysis, scanning electron microscopy, energy dispersive X-ray analysis, UVeVisible spec- troscopy, photoconduction and resistivity measurement. Structural studies show that the material Keywords: undergoes phase transition with thickness, due to co-existence of many phases. Morphological analysis InSe bilayer Thin film: thermal evaporation, optical revealed that Se content plays an important role in determining the surface morphology of the film. It properties, structural propert