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

Taishi Nishihara, Yasuhiro Yamada, Makoto Okano, Yoshihiko Kanemitsu

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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 languageEnglish
Article number023101
JournalApplied Physics Letters
Volume103
Issue number2
DOIs
Publication statusPublished - 2013 Jul 8

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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