Dynamics of excitons and trions in semiconducting carbon nanotubes

Makoto Okano, Taishi Nishihara, Yasuhiro Yamada, Yoshihiko Kanemitsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We report the optical properties and exciton dynamics of undoped and hole-doped single-walled carbon nanotubes (SWCNTs). In the one-dimensional structures of SWCNTs, an electron and a hole form an exciton with a huge exciton binding energy. Stable excitons govern the optical responses of SWCNTs even at room temperature. With hole doping of SWCNTs, new peaks due to positive trions (positively charged excitons) appear below the E11 exciton peaks in the absorption and photoluminescence spectra. Trions are also stable at room temperature. Using femtosecond pump-probe transient absorption spectroscopy, we revealed that the exciton decay dynamics depends on the number of holes in SWCNTs. The exciton lifetime of hole-doped SWCNTs is much shorter than that of undoped SWCNTs. Fast decay components with lifetimes of a few picoseconds are attributed to trion formation and exciton-hole scattering in holedoped SWCNTs.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8623
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventUltrafast Phenomena and Nanophotonics XVII - San Francisco, CA, United States
Duration: 2013 Feb 32013 Feb 6

Other

OtherUltrafast Phenomena and Nanophotonics XVII
CountryUnited States
CitySan Francisco, CA
Period13/2/313/2/6

Fingerprint

Carbon Nanotubes
Exciton
Single-walled Carbon Nanotubes
Nanotubes
Excitons
Single-walled carbon nanotubes (SWCN)
Carbon nanotubes
Carbon
carbon nanotubes
excitons
Lifetime
Decay
LDS 751
life (durability)
Absorption Spectroscopy
Femtosecond
Binding Energy
Photoluminescence
decay
room temperature

Keywords

  • Carbon nanotubes
  • Charged excitons
  • Excitons
  • Quantized Auger recombination
  • Transient absorption

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Okano, M., Nishihara, T., Yamada, Y., & Kanemitsu, Y. (2013). Dynamics of excitons and trions in semiconducting carbon nanotubes. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8623). [86231F] https://doi.org/10.1117/12.2003263

Dynamics of excitons and trions in semiconducting carbon nanotubes. / Okano, Makoto; Nishihara, Taishi; Yamada, Yasuhiro; Kanemitsu, Yoshihiko.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8623 2013. 86231F.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Okano, M, Nishihara, T, Yamada, Y & Kanemitsu, Y 2013, Dynamics of excitons and trions in semiconducting carbon nanotubes. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8623, 86231F, Ultrafast Phenomena and Nanophotonics XVII, San Francisco, CA, United States, 13/2/3. https://doi.org/10.1117/12.2003263
Okano M, Nishihara T, Yamada Y, Kanemitsu Y. Dynamics of excitons and trions in semiconducting carbon nanotubes. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8623. 2013. 86231F https://doi.org/10.1117/12.2003263
Okano, Makoto ; Nishihara, Taishi ; Yamada, Yasuhiro ; Kanemitsu, Yoshihiko. / Dynamics of excitons and trions in semiconducting carbon nanotubes. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8623 2013.
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