Shockley-De Groot theory

The Shockley-De Groot theory explains how organic solar cells convert light into electricity. It describes how when photons hit the cell, they create excitons—pairs of electrons and "holes" (missing electrons). These excitons travel to the interface between two materials, where they separate into free charge carriers. These charges then move to their respective electrodes, generating an electric current. The theory highlights the importance of this interface in efficiently splitting excitons and collecting charges, which is crucial for improving the performance of organic photovoltaic devices.