The application and the molar mass dependence of P3HT via direct arylation polycondensation are explored in fullerene-free solar cells. medium batch delivered a top efficiency ?10%.

A series of defect-free n-type copolymers poly(naphthalene diimide- alt -indacenodithiophene) P(NDI-IDT) comprising alternating naphthalene diimide (NDI) and indacenodithiophene (IDT) units is prepared using atom-economic direct arylation polycondensation (DAP).