Synergistically boosting performances of organic solar cells from dithieno[3,2-b]benzo[1,2-b;4,5-b′]dithiophene-based copolymers via side chain engineering and radical polymer additives

A wise strategy to improve the performance of NFA-OSCs from DTBDT-based polymer donors via synergistic employment of side-chain engineering and radical conjugated polymer additives is presented.