INFLUENCE OF THE ELECTRON-PHONON INTERACTION ON A DONOR LIKE EXCITON IN A SEMICONDUCTOR MICROSPHERE

We study the influence of the electron-optical phonon coupling on a do nor like exciton for which the hole is localized at the centre of a sp herical microcrystal. This work is performed within the envelope funct ion approximation considering a non denegerated conduction band. The q uantum confinement is described by an infinitively deep potential well . The electron-optical phonon coupling is treated within the adiabatic approximation. We determine the Huang-Rhys factor using a one paramet er trial wave-function which allows to include the electron-hole corre lation. The theoretical model is compared to experiment.