Electron-hole exchange interaction for donor-acceptor pairs in CdS determined as a function of separation distance by optically detected magnetic resonance

Abstract

This paper describes the first investigation of the way in which the electron-hole exchange interaction for a donor-acceptor pair depends on the separation r between the donor and the acceptor. The case studied is that of shallow donor electrons interacting with shallow acceptor holes in CdS. The electron-hole recombination produces the well-known green edge emission, which is studied here by optically detected magnetic resonance (ODMR) and by time-resolved (TR) luminescence spectroscopy.