Donor introduced into metal or nonmetal sublattice of MBE n-CdTe

摘要

The detail analysis of the shape of the photoconductivity spectra and the positions of the intra shallow donor transitions has been presented. This analysis indicates that, for the MBE method. both elements In and I are being incorporated in the host lattice of CdTe in a very similar way. The distribution of impurities as a function of the distance from interface is same in both cases. The differences in chemical shifts are small (similar to 0.3 meV) and ale related to the different ion radii of Te, Cd and both dopants. The results showing the existence of the third kind of donor (native) in those structures have been presented. This native donor, of an unknown origin, gives very pronounced peaks in the spectra. well separated from the I and In peaks. All measurements, especially these in the region of donor resonant polaron, show the full agreement of experimental results and theoretical curves for both In and I doping. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 4]