Both polymers are unipolar n-type semiconductors with electron mobility (μ e) > 0.2 cm 2 V –1 s –1, attributed to their low-lying highest occupied molecular orbitals (HOMOs) and lowest unoccupied ...

A new low band gap semiconducting polymer, PTB1, was synthesized and found promising for solar energy harvesting. Simple polymer solar cells based on PTB1 and methanofullerene [6,6]-phenyl-C71-butyric ...