Abstract
The dependence of the absorption coefficient α on the photon energy hv was determined for evaporated CdTe films. The photon energy was expressed in units of hc and the absorption coefficient was plotted as log α∝m log(hv/hc). These dependences with m=12and m=2 indicate respectively that direct and indirect optical transitions occur in CdTe thin films. The absorption data for thesefilms were analysed by applying the procedure of Khawaja and Tomlin to find the energies of direct (Egd=2.68 eV) and indirect (Egl=1.47 eV) transitions, which have not been obtained before.
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