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

Fingerprint

Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
Rydberg states
Excited states
Excitons
Carbon nanotubes
Photoluminescence
Energy gap
carbon nanotubes
excitons
Spectroscopy
photoluminescence
Photons
spectroscopy
excitation
Band structure
Ground state
photons
Doping (additives)
ground state

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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