Prolonging Charge Separation in P3HT−SWNT Composites Using Highly Enriched Semiconducting Nanotubes
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- 作者：Josh M. Holt ; Andrew J. Ferguson ; Nikos Kopidakis ; Brian A. Larsen ; Justin Bult ; Garry Rumbles ; Jeffrey L. Blackburn
- 刊名：Nano Letters
- 出版年：2010
- 出版时间：November 10, 2010
- 年：2010
- 卷：10
- 期：11
- 页码：4627-4633
- 全文大小：414K
- 年卷期：v.10,no.11(November 10, 2010)
- ISSN：1530-6992
文摘
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.