Enhancing the thermal stability of polythiophene:fullerene solar cells by decreasing effective polymer regioregularity

Kevin Sivula, Christine K. Luscombe, Barry C. Thompson, Jean Frechet

Research output: Contribution to journalArticlepeer-review

210 Scopus citations

Abstract

Regioregularity has been shown to be an important aspect for the properties of poly(3-hexylthiophene) both in the pristine material and in bulk heterojunction photovoltaics with the fullerene derivative PCBM. Here we present a straightforward method to adjust the effective regioregularity of poly(3-hexylthiophene) by introducing 3,4-dihexylthiophene into the polymer chain. By investigating bulk heterojunction morphology and photovoltaic performance upon annealing, we observe that polythiophene with 91% regioregularity maintains equivalent electronic properties but forms a more thermally stable interpenetrating network with PCBM than polythiophene with regioregularity >96%.

Original languageEnglish (US)
Pages (from-to)13988-13989
Number of pages2
JournalJournal of the American Chemical Society
Volume128
Issue number43
DOIs
StatePublished - Nov 1 2006

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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