Effect of heat treatment on the structural and optical properties of CuInTe2 thin films |
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Authors: | A M Abo El Soud T A Hendia L I Soliman H A Zayed M A Kenawy |
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Affiliation: | (1) Solid State Physics Laboratory, National Research Centre, Dokki, Cairo, Egypt;(2) University College for Women, Ain shams University, Cairo, Egypt |
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Abstract: | The CuInTe2 thin films were prepared by thermal vacuum evaporation of the bulk compound. The structural and optical properties in the temperature range 300–47 K of thin films grown on glass substrates and annealed in vacuum were studied. The films were investigated by X-ray diffraction and electron microscope techniques. The calculated lattice constants for CuInTe2 powder were found to bea=0.619 nm andc –1,234 nm. From the reflection and transmission data, the optical constants, refractive indexn, absorption index,k, and the absorption coefficient, , werw computed. The optical energy gap was determined for CuInTe2 thin films heat treated at different temparatures for different periods of time. It was found thatE
g increases with both increasing temperature and time of annealing. |
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