Journal
PHYSICAL REVIEW B
Volume 80, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.081410
Keywords
carbon nanotubes; coherence length; excitons; photoluminescence; radiative lifetimes
Funding
- JSPS [20-3712]
- JSPS KAKENHI [20340075]
- MEXT KAKENHI [20048004, 20104006]
- Grants-in-Aid for Scientific Research [20048004, 20340075] Funding Source: KAKEN
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We evaluated the radiative lifetimes and the one-dimensional exciton coherence lengths in single-walled carbon nanotubes (SWNTs). The radiative lifetimes determined from simultaneous measurements of photoluminescence (PL) lifetimes and PL quantum yields range from similar to 3 to 10 ns, and slightly increase with the tube diameter. The exciton coherence lengths in SWNTs are of the order of 10 nm, as deduced from the experimentally obtained radiative lifetimes, and they are about ten times larger than the exciton Bohr radius along the tube axis.
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