A density matrix approach to photoinduced electron injection

Details A density matrix approach to photoinduced electron injection A density matrix approach to photoinduced electron injection

2001-09-05

arxiv.org/abs/physics/0109012v1

Physics

Chemical Physics

Scientific paper

10.1016/S0022-2313(01)00341-6

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.

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