Molecular design of pyrazine based wide bandgap donor polymers for non-fullerene solar cells = Molecular design of pyrazine based wide bandgap donor polymers for non-fullerene solar cells

다국어 초록 (Multilingual Abstract)

Over the years, donor polymers based on electron-deficient nitrogen heterocycles (N-heterocycles) for PSCs have been relatively less explored. In this report, we synthesized two new polymers P1 and P2 having alternate benzodithiophene donor unit and pyrazine acceptor unit with different side chains for use in non-fullerene PSCs. These polymers demonstrated deep frontier energy levels and wide bandgaps (∼2.05 eV). We studied the structure property relationship between these polymers via various characterization techniques. The optimized PSCs obtained by blending P1 and P2 with an NF acceptor, ITIC exhibited impressive efficiencies of 7.6 and 8.1%, respectively. Our findings advance the understanding of the influence of incorporated pyrazine on the optoelectronic properties of polymer donors.