Original scientific paper
Influence of heat treatment on the physical properties of antimony trisulfide thin films
Inas K. El Zawawi
Ahmed Abd ElMoez
Fatma S. Terra
Mohamed Mounir
Abstract
The influence of isochronal and isothermal annealing for 0 to 180 minutes and at 27 to 250°C, respectively, on the optical and electrical properties of thin films of Sb2S3 have been investigated. The films deposited on glass substrate by thermal vacuum evaporation have amorphous structure, but after annealing at temperatures above 200°C for 3 hours, they change to polycrystalline structure. The optical absorption coefficient becomes higher for subgap absorption at higher annealing temperatures. The value of the optical Tauc gap and direct band gap changed with the annealing temperature. The dark electrical resistivity showed a decrease by about an order of magnitude when increasing both the isochronal and isothermal annealing treatment.
Keywords
Sb2S3 thin films vacuum evaporated; amorphous and polycrystalline; heat treatment; optical and electrical properties
Hrčak ID:
300880
URI
Publication date:
1.7.1998.
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