Thermal and compositional defects in chemical spray pyrolysed indium selenide (In2Se3) thin films: Effects on film properties
Muiva, Cosmas M
Sathiaraj, S T
Mwabora, Julius M
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Polycrystalline In2Se3 semiconducting thin films were synthesized by chemical spray pyrolysis and their properties investigated. Strong dependence of structural and opto-electronic properties on film composition was observed. Absorption coefficient (α) at normal incidence was determined and an optimised direct optical band gap (Eg) of 1.92 eV was obtained at a substrate temperature (Tsub) of 673 K. Whereas low Tsub favoured incorporation of impurities in the films, elevated Tsub had the effects of introducing textural and structural defects with modifications in the film properties. The crystallinity of the films increased with switch from chalcogen rich to chalcogen deficient films.
CitationJOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS Vol. 13, No. 9, September 2011, p. 1240 - 1245
Department of Physics, University of Botswana,Department of Physics, University of NairobiAfrican Materials Science and Engineering Network (AMSEN), a Carnegie IAS-RISE Network