STRUCTURAL AND OPTICAL-PROPERTIES OF CUINTE2 FILMS PREPARED BY THERMAL VACUUM EVAPORATION FROM A SINGLE-SOURCE

The CuInTe2 thin films were prepared by thermal vacuum evaporation fro m a single source. The effects of heat treatment on both structural an optical properties of CuInTe2 films were studied. X-ray diffraction s tudies reveal that the films prepared by the present method showed for mation of single phase CuInTe2 at heating treatment temperature higher than 300 degrees C. The calculated lattice constants for CuInTe2 film s annealed at 300 degrees C were found to be a = 6.21 Angstrom and c = 12.35 Angstrom. The value of the grain size obtained in these films w as of the order of 50 nm. The value of optical energy gap (0.97 eV) an d the dispersive refractive index n(lambda) for CuInTe2 film annealed at 300 degrees C were evaluated by optical absorption measurement.