Photoluminescence Spectra of Silver-Doped ZnSe Grown by MBE

Abstract

Photoluminescence spectra of silver-doped ZnSe grown by molecular beam epitaxy were studied at 4.2 K. The silver-related peaks were observed at 2.726 eV with phonon replicas and are thought to be due to the radiative recombination of donor-to-silver-acceptor ( D - A ) emission. The shallow acceptor level of silver in ZnSe is found, and its level is estimated to be about 71 meV from the peak energy of donor-acceptor emission, which would be consistent with the activation energy of thermal quenching of the D - A emission.