CDTE AND CDTE-CL VAPOR GROWTH IN A SEMICLOSED SYSTEM

Undoped and chlorine-doped CdTe single crystals of 2.4 cm diameter wer e grown from the vapour phase by a modified Markov method. Boundary co nditions for the control of partial pressures were realized applying a heat sink at different temperatures. The influence of the sink on dop ant incorporation was investigated by photoluminescence. Transitions o f free and bound excitons dominate the PL spectra in cases of undoped CdTe. The characteristic luminescence of the A-centre was identified i n CdTe : Cl. Alpha measurements yielded a product of carrier mobility and lifetime of 2 x 10(-4) cm(2)/V. (C) 1998 Elsevier Science B.V. All rights reserved.