The effect of hydrogenation on the defects associated with dislocations was studied in n-type crystals using cathodoluminescence imaging and photoluminescence spectra. The dislocations were introduced by indenting the Cd(111) and Te(¯1¯1¯1) faces, using a Vickers micro-hardness apparatus. Hydrogenation was achieved by annealing the samples in closed ampoules at 500C for 70h under a D atmosphere at a pressure of 700mbar. The cathodoluminescence images of hydrogenated samples revealed removal of the long arms of the indentation rosette on the Te face and of the short arms on the Cd face. This was accounted for in terms of the formation of TeH2-like volatile entities. The photoluminescence spectra indicated that the general effect of plastic deformation was to create acceptor centers which were related to mobile impurities (Cu) and to Cd vacancies. These acceptors could be passivated by forming neutral complexes with D.

Optical Study of Interactions of Hydrogen with Dislocations in CdTe. K.Guergouri, N.Brihi, Y.Marfaing, R.Triboulet: Journal of Crystal Growth, 2003, 256[3-4], 230-6