TIME-RESOLVED PHOTOLUMINESCENCE OF HEAVILY NITROGEN-DOPED ZNSE - ROLEOF FLUCTUATIONS

Results of time-resolved photoluminescence of several heavily nitrogen -doped ZnSe samples ([N] > 10(18) cm(-3)) are presented, with emphasis on the decay at relatively long times and at a particular wavelength of decay. Both these aspects are well explained by the presence of pot ential fluctuations in such materials, but not by earlier theories whi ch neglected fluctuations. The observed decay as a function of N conce ntration is also well explained by our model. We obtain quantitative a greement, and obtain good values for the decay constant W-0 and for th e net acceptor concentrations. (C) 1998 Published by Elsevier Science B.V. All rights reserved.