Photoluminescence and Acceptor State of Na in ZnSe

Abstract
Sodium was incorporated into high-purity ZnSe single crystals by dipping the crystal into molten Se-base Na alloys. The I 1 Na line and two types of donor-acceptor pair (DAP) emissions were observed. An acceptor binding energy of 117 meV was obtained for Na by analyzing the selective photoluminescence spectra on the I 1 Na line and the excitation intensity dependence of the peak energy of DAP emissions. It is confirmed that the P emission observed in DAP emission is due to the recombination between the Na acceptor and Ga donor.