Quantized exciton-exciton recombination in undoped and hole-doped single-walled carbon nanotubes

Taishi Nishihara, Yasuhiro Yamada, Makoto Okano, Yoshihiko Kanemitsu

Research output: Contribution to journalArticle

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Abstract

We studied the quantized exciton Auger recombination in undoped and hole-doped single-walled carbon nanotubes (SWCNTs) by means of transient absorption spectroscopy and theoretical calculations. In undoped SWCNTs, a fast decay component appears under strong photoexcitation owing to two-exciton Auger recombination. The exciton decay dynamics is well explained by the quantized exciton Auger recombination model that takes into consideration the dark-exciton state. In hole-doped SWCNTs, the fast decay component is drastically reduced even under strong photoexcitation. We calculated the temporal evolution of the exciton population in hole-doped samples by considering exciton-hole interactions and the hole-number distribution in SWCNTs, and found it to be in good agreement with the experimental results.

Original languageEnglish
Article number02BD10
JournalJapanese Journal of Applied Physics
Volume53
Issue number2 PART 2
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Single-walled carbon nanotubes (SWCN)
Excitons
carbon nanotubes
excitons
Photoexcitation
photoexcitation
decay
Absorption spectroscopy
absorption spectroscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Quantized exciton-exciton recombination in undoped and hole-doped single-walled carbon nanotubes. / Nishihara, Taishi; Yamada, Yasuhiro; Okano, Makoto; Kanemitsu, Yoshihiko.

In: Japanese Journal of Applied Physics, Vol. 53, No. 2 PART 2, 02BD10, 2014.

Research output: Contribution to journalArticle

Nishihara, Taishi ; Yamada, Yasuhiro ; Okano, Makoto ; Kanemitsu, Yoshihiko. / Quantized exciton-exciton recombination in undoped and hole-doped single-walled carbon nanotubes. In: Japanese Journal of Applied Physics. 2014 ; Vol. 53, No. 2 PART 2.
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