Carbon nanotube chirality determines efficiency of electron transfer to fullerene in all-carbon photovoltaics

Christine M. Isborn*, Chun Tang, Ashlie Martini, Erin R. Johnson, Alberto Otero-De-La-Roza, Vincent C. Tung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Nanocarbon-based photovoltaics offer a promising new architecture for the next generation of solar cells. We demonstrate that a key factor determining the efficiency of single-walled carbon nanotube (SWCNT)/fullerene devices is the chirality of the SWCNT. This is shown via current density vs voltage measurements of nanocarbon devices prepared with (9,7), (7,6) and (6,5) SWCNTs, as well as density-functional theory (DFT) density of states calculations of C60 adsorbed onto the corresponding SWCNTs. The trends in efficiency are rationalized in terms of the relative energies of the fullerene and SWCNT conduction band energy levels.

Original languageEnglish (US)
Pages (from-to)2914-2918
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume4
Issue number17
DOIs
StatePublished - Sep 5 2013
Externally publishedYes

Keywords

  • carbon nanotubes
  • charge transfer
  • chirality
  • exciton dissociation
  • photovoltaics

ASJC Scopus subject areas

  • Materials Science(all)

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