Polymer acceptors are a type of material used in organic electronic devices, particularly in organic photovoltaic (OPV) cells. These materials are combined with polymer donors to create active layers that can convert sunlight into electricity. Polymer acceptors have high electron affinity and are able to accept electrons from the polymer donor, creating a charge separation that generates an electrical current. Research in this area focuses on developing new polymers with improved efficiency and stability for use in OPV cells, as well as understanding the fundamental principles of charge generation and transport within these devices.