Ordering effects in benzo[1,2-b:4,5-b']difuran-thieno[3,4-c]pyrrole-4,6-dione polymers with >7% solar cell efficiency.

Ordering effects in benzo[1,2-b:4,5-b']difuran-thieno[3,4-c]pyrrole-4,6-dione polymers with >7% solar cell efficiency.