Abstract: | A study was made of dislocation density, Hall effect, conductivity, and photoeffects in In-doped Pb0.78Sn0.22Te epitaxial layers. From an analysis of RH vs T the existence of resonant as well as deep levels is concluded, dependent on In content and defect structure. Samples with about 0.4 at.% In which are not compensated, exhibit photoresponse as well as luminescence. |