Observation of excited-state excitons and band-gap renormalization in hole-doped carbon nanotubes using photoluminescence excitation spectroscopy

Yoshio Kimoto, Makoto Okano, Yoshihiko Kanemitsu

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The higher Rydberg states of the E11 exciton in undoped and hole-doped single-walled carbon nanotubes (SWCNTs) were studied using one- and two-photon photoluminescence excitation spectroscopy. Increasing the hole-dopant concentration resulted in a redshift of the first excited state (2g) and a blueshift of the ground state (1u) of the E11 exciton. From the redshift of higher Rydberg states, we found that a reduction of the band-gap energy occurs in hole-doped SWCNTs. These findings show that the exciton and electronic band structures are modified by the presence of a small number of holes in the SWCNT one-dimensional structures.

Original languageEnglish
Article number195416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number19
DOIs
Publication statusPublished - 2013 May 9
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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