where kMarcus corresponds to the nonradiative ET rate, which is identical to the Marcus ET rate, and kQED is the QED-driven radiative ET rate. In other words, both electrostatic effects (from Coulomb interactions) and electrodynamic effects (from QED) can be captured by eq 1. Moreover, kQED can be expressed as the integral of the photonic density of states (DOS) ρph(ωph), vibrational transition DOS ρvib(ωph), and light-matter coupling factor F(ωph) in the following form: