Electrical properties of HgCdTe films grown by MOCVD and doped with as

Abstract

Electrical properties of HgCdTe films grown by metal-organic chemical vapour deposition (MOCVD) on GaAs substrates and doped with the As acceptor during the growth were studied. Discrete mobility spectrum analysis was used to extract the parameters of the as-grown films and films after ion milling and during prolonged relaxation of milling-induced defects. The measurements revealed significant compensation of the as-grown MOCVD HgCdTe with As on Te sites being the main defect, residual donor concentration of the order of (2-5)×1015 cm-3, and the presence of some unidentified defects. © 2013 Versita Warsaw and Springer-Verlag Wien.