Patent ID: 8883954

Claim:
An article, comprising: a first electrode, a second electrode, and a photoactive layer disposed between the first and second electrodes, the photoactive layer comprising a polymer including a first monomer repeat unit, the first monomer repeat unit comprising a moiety of formula (1): in which A is S; and R is H, C 1 -C 24 alkyl optionally containing oxygen, C 2 -C 24 alkenyl, C 2 -C 24 alkynyl, C 3 -C 24 cycloalkyl, C 3 -C 24 cycloalkenyl, C 3 -C 24 heterocycloalkyl, C 3 -C 24 heterocycloalkenyl, aryl, or heteroaryl; wherein the article is configured as a photovoltaic cell.