All-polymer photovoltaic devices of poly(3-(4-n-octyl)-phenylthiophene) from grignard metathesis (GRIM) polymerization

Thomas W. Holcombe, Claire H. Woo, David F.J. Kavulak, Barry C. Thompson, Jean Frechet

Research output: Contribution to journalArticlepeer-review

161 Scopus citations

Abstract

(Graph Presented) The synthesis of poly[3-(4-n-octyl)-phenylthiophene] (POPT) from Grignard Metathesis (GRIM) is reported. GRIM POPT is found to have favorable electronic, optical, and processing properties for organic photovoltaics (OPVs). Space-charge limited current and field effect transistor measurements for POPT yielded hole mobilities of 1 × 10-4 cm2/(V s) and 0.05 cm2/(V s), respectively. Spincasting GRIM POPT from chlorobenzene yields a thin film with a 1.8 eV band gap, and PC61BM:POPT bulk heterojection devices provide a peak performance of 3.1%. Additionally, an efficiency of 2.0% is achieved in an all-polymer, bilayer OPV using poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-(1-cyanovinylene) phenylene] (CNPPV) as an acceptor. This state-of-the-art all-polymer device is analyzed in comparison to the analogous poly(3-hexylthiophene) (P3HT)/CNPPV device. Counter to expectations based on more favorable energy level alignment, greater active layer light absorption, and similar hole mobility, P3HT/CNPPV devices perform less well than POPT/CNPPV devices with a peak efficiency of 0.93%.

Original languageEnglish (US)
Pages (from-to)14160-14161
Number of pages2
JournalJournal of the American Chemical Society
Volume131
Issue number40
DOIs
StatePublished - Oct 14 2009
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-C1-015-21
Acknowledgements: This work was supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 and in part by the King Abdullah University of Science and Technology (KAUST) Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21). T.W.H. and C.H.W. thank the NSF for graduate research fellowships. We also thank Jill E. Millstone and Alejandro L. Briseno for helpful discussions.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • General Chemistry
  • Biochemistry
  • Catalysis
  • Colloid and Surface Chemistry

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