Abstract
The /ZnO and / step quantum well structures have been produced by the pulsed laser deposition method. It has been established that the increase of the barrier height ratio for charge carriers in the conduction and valence bands upon transition from the active ZnO layers in the /ZnO system to the active layers of in a low-dimensional / system is associated with the fact that the electron concentration in films rises with an increase in the cadmium content. As a result, the Fermi level is displaced to the bottom of the conduction band. In the range of quantum well widths from 1 nm to 12 nm the nonmonotonous growth of exciton and defect-related intensities in photoluminescence spectra is observed.
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