Carrier generation layer samples representative of layered photoreceptors consisting of carrier generation materials (CGM), carrier transport materials (CTM), and binder resin were prepared by the wet-coating technique. The samples were analyzed in terms of the CTM reaction species, the morphology of molecular contact at the CGM/CTM interface, and the CGM reaction species, all of which affect the photoinduced electron transfer (ET) in the samples, The ET reaction was found to be dependent on the CTM concentration through photoluminescence (PL) quenching in steady-state measurements. An analysis of this concentration dependence revealed that only the nearest CTM molecules to CGM particles participate in photoinduced ET. From the results of PL lifetime measurements, it was clarified that excitons near the surface of the CGM particles diffuse efficiently to the interface to participate in the reaction, whereas excitons near the center of the particles are deactivated before reaching the surface (reaction site).