Photoluminescence from disorder induced states in individual single-walled carbon nanotubes

Hayk Harutyunyan, Tobias Gokus, Alexander A. Green, Mark C Hersam, Maria Allegrini, Achim Hartschuh

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report on the generation of new low-energy photoluminescence (PL) bands in the spectra of semiconducting single-walled carbon nanotubes (SWNTs). The new bands, that are brightened because of local modifications of the nanotube structure or the metal adsorption on the SWNT surface, are attributed to PL from different nominally dark excitons that are "brightened" due to defect-induced mixing of states with different parity and/or spin. The effect of the created structural disorder on the dynamical properties of the emission is studied by time-resolved PL measurements revealing a significant reduction of the bright exciton lifetime. The lowest energy dark state has a longer lifetime and is not in thermal equilibrium with the bright state.

Original languageEnglish
Pages (from-to)2679-2682
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume246
Issue number11-12
DOIs
Publication statusPublished - Dec 2009

Fingerprint

Single-walled carbon nanotubes (SWCN)
Photoluminescence
carbon nanotubes
disorders
photoluminescence
Excitons
excitons
life (durability)
dark energy
Nanotubes
nanotubes
parity
Metals
Adsorption
Defects
adsorption
defects
metals
LDS 751
energy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Photoluminescence from disorder induced states in individual single-walled carbon nanotubes. / Harutyunyan, Hayk; Gokus, Tobias; Green, Alexander A.; Hersam, Mark C; Allegrini, Maria; Hartschuh, Achim.

In: Physica Status Solidi (B) Basic Research, Vol. 246, No. 11-12, 12.2009, p. 2679-2682.

Research output: Contribution to journalArticle

Harutyunyan, Hayk ; Gokus, Tobias ; Green, Alexander A. ; Hersam, Mark C ; Allegrini, Maria ; Hartschuh, Achim. / Photoluminescence from disorder induced states in individual single-walled carbon nanotubes. In: Physica Status Solidi (B) Basic Research. 2009 ; Vol. 246, No. 11-12. pp. 2679-2682.
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