Synthesis and solar cell application of new alternating donor: acceptor copolymers based on variable units of fluorene, thiophene, and phenylene - Yamamoto, Natasha A. D.; Lavery, Leah L.; Nowacki, Bruno F.; Grova, Isabel R.; Whiting, Gregory L.; Krusor, Brent; Azevêdo, Eduardo Ribeiro de; Akcelrud, Leni; Arias, Ana C.; Roman, Lucimara S. (Journal of Physical Chemistry C, 2012)