Local atomic structure of deep level centers in doped II-VI semiconductors

Theoretical models of the local atomic structure of deep level centers prod uced by doping of II-VI semiconductors are reviewed. X-ray absorption spect roscopy (XAS) measurements on zinc-selenide doped with chlorine are present ed. From the changes observed in the spectra with increasing chlorine conce ntrations, the existence of lattice distortions around the dopant sites is inferred. The relation of such lattice distortions with the proposed theore tical models is discussed.