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Abstract
Thin films of In 2Te 3 have been prepared by thermal evaporation of stoichiometric bulk material and their optical absorption has been studied in the near-infrared region for various deposition temperatures in the range 300–650 K. It is observed that In 2Te 3 films have a direct energy gap of 1.05 ± 0.03 eV. An interesting observation is that the films exhibit a region of optical transparency when deposited at temperatures in the range 400–600 K. Deposition at temperatures above 600 K results in the formation of the InTe phase which possesses a band gap energy of 1.23 eV and gradual decrease of the optical transparent region.
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