title: A polymer with a benzo[2,1-b;3,4-b']dithiophene moiety for photovoltaic applications.
abstract: The characterization of a benzo[2,1-b;3,4-b']dithiophene containing conjugated polymer (PBTT) is demonstrated, with regard to its photovoltaic performance. X-ray diffraction measurements reveal that the thermal treatment results in an increased crystallinity within the PBTT:[70]PCBM network and subsequent spatial rearrangement in the film. Upon stepwise annealing, the PBTT-based bulk-heterojunction solar cells show an overall conversion efficiency of 2.7% under 1 sun light illumination. The photovoltaic devices based on PBTT show a high efficiency, maintained over one month. All these aspects suggest that the use of self-organizable materials is an efficient approach for high-performance photovoltaic applications.
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
authors.forename: Miaoyin
authors.initials: M
authors.lastname: Liu
authors.forename: Ralph
authors.initials: R
authors.lastname: Rieger
authors.forename: Chen
authors.initials: C
authors.lastname: Li
authors.forename: Hansjörg
authors.initials: H
authors.lastname: Menges
authors.forename: Marcel
authors.initials: M
authors.lastname: Kastler
authors.forename: Martin
authors.initials: M
authors.lastname: Baumgarten
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
mesh_terms: D001562:Benzimidazoles / Q000737:chemistry*; D004563:Electrochemistry; D010777:Photochemistry / Q000295:instrumentation / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy; D013499:Surface Properties; D013841:Thiazepines / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001562:Benzimidazoles; D011108:Polymers; D013841:Thiazepines; D013876:Thiophenes; C553050:poly(2,7-(benzo(2,1-b-3,4-b')dithiophene)-alt-2,2'-(3,3'-didodecyl-5,5'-bithiophenyl))