title: Thermally stable and efficient polymer solar cells based on a novel donor-acceptor copolymer.
abstract: We report high photovoltaic performance of a novel donor-acceptor (D-A) conjugated polymer poly[2,6[4,8-bis(2-ethyl-hexyl)benzo[1,2-b;4,5-b']dithiophene-co-2,5-thiophene-co-4,7[5,6-bis-octyloxy-benzo[1,2,5]thiadiazole]-co-2,5-thiophene] (PBDTTBTZT) in bulk heterojunctions with [6,6]-phenyl-C71-butyric acid methyl ester (PC70BM). A power conversion efficiency (PCE) of more than 7% is obtained for optimized charge-extracting electrodes. Upon application of thermal stress via annealing, a superior thermal stability is demonstrated as compared to poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT).
authors.affiliation: Institute of Physics, Technische Universität Ilmenau, 98693 Ilmenau, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Synooka
authors.forename: K-R
authors.initials: KR
authors.lastname: Eberhardt
authors.forename: J
authors.initials: J
authors.lastname: Balko
authors.forename: T
authors.initials: T
authors.lastname: Thurn-Albrecht
authors.forename: G
authors.initials: G
authors.lastname: Gobsch
authors.forename: W
authors.initials: W
authors.lastname: Mitchell
authors.forename: S
authors.initials: S
authors.lastname: Berny
authors.forename: M
authors.initials: M
authors.lastname: Carrasco-Orozco
authors.forename: H
authors.initials: H
authors.lastname: Hoppe