Trion formation and recombination dynamics in hole-doped single-walled carbon nanotubes

Taishi Nishihara; Yasuhiro Yamada; Makoto Okano; Yoshihiko Kanemitsu

doi:10.1063/1.4813014

Trion formation and recombination dynamics in hole-doped single-walled carbon nanotubes

Taishi Nishihara, Yasuhiro Yamada, Makoto Okano, Yoshihiko Kanemitsu

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

We studied the trion (charged exciton) formation and recombination dynamics in hole-doped (7,5) single-walled carbon nanotubes (SWCNTs) by performing femtosecond transient absorption spectroscopy. The doping of SWCNTs with holes leads to a fast decay component from an exciton to a trion, and the trion decays with a lifetime of a few picoseconds. The experimental results can be explained by a quantized model accounting for the dark exciton and trion states and the hole number distribution in a SWCNT. Our findings show that the optical responses of SWCNTs can be manipulated by doping of SWCNTs with a small number of holes.

Original language	English
Article number	023101
Journal	Applied Physics Letters
Volume	103
Issue number	2
DOIs	https://doi.org/10.1063/1.4813014
Publication status	Published - 2013 Jul 8
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4813014

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title = "Trion formation and recombination dynamics in hole-doped single-walled carbon nanotubes",

abstract = "We studied the trion (charged exciton) formation and recombination dynamics in hole-doped (7,5) single-walled carbon nanotubes (SWCNTs) by performing femtosecond transient absorption spectroscopy. The doping of SWCNTs with holes leads to a fast decay component from an exciton to a trion, and the trion decays with a lifetime of a few picoseconds. The experimental results can be explained by a quantized model accounting for the dark exciton and trion states and the hole number distribution in a SWCNT. Our findings show that the optical responses of SWCNTs can be manipulated by doping of SWCNTs with a small number of holes.",

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AU - Nishihara, Taishi

AU - Yamada, Yasuhiro

AU - Okano, Makoto

AU - Kanemitsu, Yoshihiko

N1 - Funding Information: Part of this work was supported by KAKENHI (20104006, 25247052), MEXT Project of Integrated Research on Chemical Synthesis, The Sumitomo Electric Industries Group CSR Foundation, and JST-CREST.

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N2 - We studied the trion (charged exciton) formation and recombination dynamics in hole-doped (7,5) single-walled carbon nanotubes (SWCNTs) by performing femtosecond transient absorption spectroscopy. The doping of SWCNTs with holes leads to a fast decay component from an exciton to a trion, and the trion decays with a lifetime of a few picoseconds. The experimental results can be explained by a quantized model accounting for the dark exciton and trion states and the hole number distribution in a SWCNT. Our findings show that the optical responses of SWCNTs can be manipulated by doping of SWCNTs with a small number of holes.

AB - We studied the trion (charged exciton) formation and recombination dynamics in hole-doped (7,5) single-walled carbon nanotubes (SWCNTs) by performing femtosecond transient absorption spectroscopy. The doping of SWCNTs with holes leads to a fast decay component from an exciton to a trion, and the trion decays with a lifetime of a few picoseconds. The experimental results can be explained by a quantized model accounting for the dark exciton and trion states and the hole number distribution in a SWCNT. Our findings show that the optical responses of SWCNTs can be manipulated by doping of SWCNTs with a small number of holes.

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Trion formation and recombination dynamics in hole-doped single-walled carbon nanotubes

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