Abstract

Nitrogen-doped p-type ZnSe, p-type ZnS ySe 1− y , and p-type Zn 1− x Mg x S y Se 1− y epilayers were grown on n-type GaAs (1 0 0) substrates by molecular beam epitaxy. Photoluminescence (PL) spectra for the p-type ZnSe and the lattice-matched p-type ZnS 0.06Se 0.94, and p-type Zn 0.92Mg 0.08S 0.12Se 0.88 epilayers showed a deep acceptor bound exciton emission and a donor–acceptor pair emission. Temperature-dependent PL measurements were carried out to determine the activation energies of these states. The activation energies of the acceptor-bound excitons and the donor–acceptor pairs were determined to be 40 and 65 meV in the p-type ZnSe epilayer, 20 and 45 meV in the p-type ZnS 0.06Se 0.94, and 45 and 43 meV in the p-type Zn 0.92Mg 0.08S 0.12Se 0.88 epilayers.

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