The Huang–Rhys factor and the strength of exciton–LO phonon coupling in ZnO/Mg0.15Zn0.85O superlattices

The temperature dependence of the photoluminescence full width at half maximum and the Huang–Rhys S factor is investigated in ZnO/Mg0.15Zn0.85O superlattices. The coupling strength between excitons and longitudinal–optical phonons, which calculated from the temperature dependence of the photoluminescence full width at half maximum, is closely related to the exciton binding energies when the wellwidth is small.