The observation of persistent photoconductivity in nitrogen-doped p-ZnMgSSe at low temperature is reported. The increase of conductivity after illumination appears due to a metastable population of holes which are in thermodynamic equilibrium with hydrogenic acceptors having reduced activation energy. The experimental evidence suggests the presence of a DX-like [D (donor) X center] behavior for holes.
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Han et al. (1994) studied this question.
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