Spectroscopic analysis reveals reduced photoluminescence efficiency in delta-doped ZnSe:(Te,N), suggesting nonradiative losses driven by Auger recombination.
We have studied the low temperature photoluminescence (PL) of a δ-doped ZnSe:(Te,N) system using two different types of samples, one with single δ layers separated by undoped spacers and the other with three adjacent δ layers in each doping cycle. We have concluded that both Te and N participate in radiative recombination. We observe a relatively low PL efficiency (compared to samples without N) for these samples, and we suggest that Auger recombination is a likely mechanism, although a role of slow donor–acceptor pair PL and consequent nonradiative processes cannot be ruled out.
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Kuskovsky et al. (2001) studied this question.
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