Study of the sub-bandgap absorption and the optical transitions in CuInSe2 polycrystalline thin films |
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Authors: | N. Kavcar |
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Abstract: | Optical transitions near the fundamental band edge are studied for CuInSe2 films having various Cu/In ratios by analysing the variations of the absorption coefficient with incident photon energy. The results indicate different transitions depending upon the Cu/In ratio. There are sub-bandgap absorption for near stoichiometric and Cu-rich films. The results are compared to some literature data. |
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Keywords: | Optical transitions CuInSe2 Absorption coefficient Photon energy |
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