We consider a model photoinduced ET system that is coupled to a single mode cavity at the Tavis-Cummings level of approximation. In particular, we consider the CdSe Nanoplatelet (NPL) as the photoinduced charge transfer donor molecule, and organic molecules (such as viologen molecules) as the charge acceptor. The CdSe NPL and viologen molecules outside the cavity have been previously synthesized and reported in the literature , and the photoinduced charge transfer kinetics have also been investigated. We consider each donor is electronically coupled to the acceptor molecule through chemically local electronic coupling V DA . We further consider that the cavity mode will couple collectively to a total of N of the donor-acceptor molecules, through the transition dipole of the donor (CdSe NPL), which has been accomplished in our recent experimental work. The lightmatter interactions, as opposed to the electronic coupling, are highly non-local between the cavity mode and N molecules. A schematic illustration of the model system is provided in Fig. , and the energy diagram for the model systems are depicted in panels (b)-(c).