Analysis of Photoluminescence from Solubilized Single-Walled Carbon Nanotubes

Marcus Jones; Chaiwat Engtrakul; Wyatt K. Metzger; Randy J. Ellingson; Arthur J. Nozik; Michael J. Heben; Garry Rumbles

doi:10.1103/PhysRevB.71.115426

Analysis of Photoluminescence from Solubilized Single-Walled Carbon Nanotubes

Marcus Jones, Chaiwat Engtrakul, Wyatt K. Metzger, Randy J. Ellingson, Arthur J. Nozik, Michael J. Heben, Garry Rumbles

National Renewable Energy Laboratory

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Abstract

The functional form of the photoluminescence (PL) line shape from individual single-walled carbon nanotube (SWNT) species is found to contain a significant Lorentzian component and the Stokes shift is observed to be very small (<8 meV), which suggests an excitonic dephasing mechanism that is largely decoupled from surrounding solvent and surfactant molecules. The PL quantum yield (PLQY) of two SWNT species is determined to be ∼5×10 ^-4, and it is suggested that this is lower than the "true" value due to quenching of the PL in bundles by metallic tubes. Time-resolved PL measurements reveal a dominant, luminescence lifetime component of 130 ps that, when combined with a predicted natural radiative lifetime of ∼20 ns, suggests that the true PLQY is ∼6.5×10 ^-3. Finally, deconvoluted PL excitation spectra are produced for eight SWNT species, and the appearance of a higher-energy excitonic subband is discussed.

Original language	American English
Article number	Article No. 115426
Number of pages	9
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.71.115426 https://doi.org/10.1103/PhysRevB.71.115426
State	Published - 15 Mar 2005

NREL Publication Number

NREL/JA-590-36417

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Jones, M., Engtrakul, C., Metzger, W. K., Ellingson, R. J., Nozik, A. J., Heben, M. J., & Rumbles, G. (2005). Analysis of Photoluminescence from Solubilized Single-Walled Carbon Nanotubes. Physical Review B - Condensed Matter and Materials Physics, 71(11), Article Article No. 115426. https://doi.org/10.1103/PhysRevB.71.115426, https://doi.org/10.1103/PhysRevB.71.115426

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abstract = "The functional form of the photoluminescence (PL) line shape from individual single-walled carbon nanotube (SWNT) species is found to contain a significant Lorentzian component and the Stokes shift is observed to be very small (<8 meV), which suggests an excitonic dephasing mechanism that is largely decoupled from surrounding solvent and surfactant molecules. The PL quantum yield (PLQY) of two SWNT species is determined to be ∼5×10 -4, and it is suggested that this is lower than the {"}true{"} value due to quenching of the PL in bundles by metallic tubes. Time-resolved PL measurements reveal a dominant, luminescence lifetime component of 130 ps that, when combined with a predicted natural radiative lifetime of ∼20 ns, suggests that the true PLQY is ∼6.5×10 -3. Finally, deconvoluted PL excitation spectra are produced for eight SWNT species, and the appearance of a higher-energy excitonic subband is discussed.",

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AU - Ellingson, Randy J.

AU - Nozik, Arthur J.

AU - Heben, Michael J.

AU - Rumbles, Garry

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Analysis of Photoluminescence from Solubilized Single-Walled Carbon Nanotubes

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