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FIZIKA A (1998) 3, 97-106
 
INFLUENCE OF HEAT TREATMENT ON THE PHYSICAL PROPERTIES OF ANTIMONY
TRISULFIDE THIN FILMS
INAS K. EL ZAWAWIa, AHMED ABD ELMOEZa, FATMA S.
TERRAa and MOHAMED MOUNIRb
aSolid State Physics Lab., National Research Centre,
Tahrir St., Dokki, Cairo, Egypt
bPhysics Department, Faculty of Science, Cairo University, Giza, Cairo, Egypt
Received 15 December 1997;
Accepted 7 September 1998
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
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