23 research outputs found
A density matrix approach to photoinduced electron injection
Electron injection from an adsorbed molecule to the substrate (heterogeneous
electron transfer) is studied. One reaction coordinate is used to model this
process. The surface phonons and/or the electron-hole pairs together with the
internal degrees of freedom of the adsorbed molecule as well as possibly a
liquid surrounding the molecule provide a dissipative environment, which may
lead to dephasing, relaxation, and sometimes excitation of the relevant system.
In the process studied the adsorbed molecule is excited by a light pulse. This
is followed by an electron transfer from the excited donor state to the
quasi-continuum of the substrate. It is assumed that the substrate is a
semiconductor. The effects of dissipation on electron injection are
investigated