Prolonging Charge Separation in P3HT-SWNT Composites Using Highly Enriched Semiconducting Nanotubes

Josh M. Holt, Andrew J. Ferguson, Nikos Kopidakis, Brian A. Larsen, Justin Bult, Garry Rumbles, Jeffrey L. Blackburn

Research output: Contribution to journalArticlepeer-review

107 Scopus Citations


Single-walled carbon nanotubes (SWNTs) have potential as electron acceptors in organic photovoltaics (OPVs), but the currently low-power conversion efficiencies of devices remain largely unexplained. We demonstrate effective redispersion of isolated, highly enriched semiconducting and metallic SWNTs into poly(3-hexylthiophene) (P3HT). We use these enriched blends to provide the first experimental evidence of the negative impact of metallic nanotubes. Time-resolved microwave conductivity reveals that the long-lived carrier population can be significantly increased by incorporating highly enriched semiconducting SWNTs into semiconducting polymer composites.

Original languageAmerican English
Pages (from-to)4627-4633
Number of pages7
JournalNano Letters
Issue number11
StatePublished - 2010

NREL Publication Number

  • NREL/JA-590-48997


  • charge generation
  • charge recombination
  • organic photovoltaic
  • P3HT
  • polythiophene
  • Single-walled carbon nanotubes
  • time-resolved microwave conductivity


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