title: Thieno[3,4-c]pyrrole-4,6-dione-3,4-difluorothiophene Polymer Acceptors for Efficient All-Polymer Bulk Heterojunction Solar Cells.
abstract: Branched-alkyl-substituted poly(thieno[3,4-c]pyrrole-4,6-dione-alt-3,4-difluorothiophene) (PTPD[2F]T) can be used as a polymer acceptor in bulk heterojunction (BHJ) solar cells with a low-band-gap polymer donor (PCE10) commonly used with fullerenes. The "all-polymer" BHJ devices made with PTPD[2F]T achieve efficiencies of up to 4.4 %. While, to date, most efficient polymer acceptors are based on perylenediimide or naphthalenediimide motifs, our study of PTPD[2F]T polymers shows that linear, all-thiophene systems with adequately substituted main chains can also be conducive to efficient BHJ solar cells with polymer donors.
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Shengjian
authors.initials: S
authors.lastname: Liu
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Kan
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Simil
authors.initials: S
authors.lastname: Thomas
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Federico
authors.initials: F
authors.lastname: Cruciani
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Brédas
authors.affiliation: Physical Science and Engineering Division, Solar & Photovoltaics Engineering Research Center (SPERC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia. pierre.beaujuge@kaust.edu.sa.
authors.forename: Pierre M
authors.initials: PM
authors.lastname: Beaujuge
keywords: density-functional calculations; electron microscopy; materials science; polymers; solar cells