Dithienoquinoxaline-quaterthiophene wide bandgap donor polymers with strong interchain aggregation for efficient organic solar cells processed with a non-halogenated solvent

Wide bandgap oligothiophene based polymers PQx4T and PQx4T-2F were synthesized, among which PQx4T-2F was very efficient to construct toluene-processed active layers with a non-fullerene acceptor.