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The first far-infrared (FIR) magnetoabsorption study of iodine (I)-doped n-ZnSe is described. The FIR experiments are carried out by observing the Zeeman absorption spectra with a FIR-laser and high-magnetic fields. Four different donor species, including the I-donor, are resolved, and the I-donor ionization energy of 25.6 meV is precisely estimated. Moreover, compensation ratios and absolute donor (or acceptor) densities N d are determined. As a result, it is found that the acceptor density N a increased almost linerly with increasing N d . This suggets a deep and complex origin for the acceptors in the I-doped ZnSe.
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Saito et al. (1991) studied this question.
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