Abstract
The indirect absorption of light by size-quantized semiconductor film is theoretically investigated. It is supposed that the mechanism of indirect absorption is conditioned by charge carrier's scattering on dislocations. The dispersion law of electron in the immediate vicinity of the maximum of valence band is considered as non-parabolic and is described in two-band Kane approximation. The absorption coefficient is calculated. It is shown, that under non-parabolic dispersion law of electron the dependence of absorption coefficient on (ℏω-εv(0)) near the absorption edge has quadratic dependence. It is shown, that the non-parabolicity of dispersion law results in increased absorption coefficient.
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