4.8 Article

Synthesis and Photovoltaic Effect in Dithieno[2,3-d:2′,3′-d′]Benzo[1,2-b:4,5-b′]dithiophene-Based Conjugated Polymers

Journal

ADVANCED MATERIALS
Volume 25, Issue 6, Pages 838-843

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201204238

Keywords

polymer solar cells; bulk heterojunctions; acene

Funding

  1. NSF [DMR-1004195]
  2. AFOSR [FA9550-12-1-0061]
  3. NSF-MRSEC (the University of Chicago) [DMR-0820054]
  4. Energy Frontier Research Center
  5. U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001059]
  6. University of Chicago-Argonne Strategic Collaborative Initiative
  7. Argonne Director's Postdoctoral Fellowship
  8. Center for Nanoscale Materials, a U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences User Facility [DE-AC02-06CH11357]
  9. Direct For Mathematical & Physical Scien
  10. Division Of Materials Research [820054, 1004195] Funding Source: National Science Foundation

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Conjugated polymers based on a heteroacene, 3,7-dialkyl-dithieno[2,3-d:2',3'-d']benzo[1,2-b:4,5-b']dithiophene (DBD), are synthesized. These polymers show broad UV-vis absorption with energy bandgaps below 1.7 eV. PTDBD2, showing good miscibility in a polymer/phenyl-C71-butyric acid methyl ester (PC71BM) blend film, achieves a power conversion efficiency (PCE) of 7.6%. The results indicate that copolymers containing DBD are promising candidates for high-performance organic solar cells.

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