Therefore, the charge transport process is wave-like with scatterings by phonons, impurities, disorders, etc. . Combining Boltzmann transport equation with Matthiessen's rule, insights into the thermoelectric transport process have been revealed for a number of systems . Meanwhile, it should be borne in mind that the most important characteristics of organic/polymeric materials lies in the structural flexibility and the disorders/impurities . From the perspective of device physics modeling, hopping theory has been widely employed to describe carrier transport. The origin of carrier localization relies on the assumption of strong electron-phonon coupling, and thus carriers travel through the system via a hopping process . With the assistance of numerical simulation, plenty of studies have been carried out in hopping limit .