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Multiple Exciton Generation in Single-Walled Carbon Nanotubes

Upon absorption of single photons, multiple excitons were generated and detected in semiconducting single-walled carbon nanotubes (SWNTs) using transient absorption spectroscopy. For (6,5) SWNTs, absorption of single photons with energies corresponding to three times the SWNT energy gap results in a...

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Published in:	Nano letters 2010-07, Vol.10 (7), p.2381-2386
Main Authors:	Wang, Shujing, Khafizov, Marat, Tu, Xiaomin, Zheng, Ming, Krauss, Todd D
Format:	Article
Language:	English
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron states Exact sciences and technology Excitons and related phenomena Fullerenes and related materials Materials science Nanoscale materials and structures: fabrication and characterization Nanotubes Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Physics Visible and ultraviolet spectra
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description	Upon absorption of single photons, multiple excitons were generated and detected in semiconducting single-walled carbon nanotubes (SWNTs) using transient absorption spectroscopy. For (6,5) SWNTs, absorption of single photons with energies corresponding to three times the SWNT energy gap results in an exciton generation efficiency of 130% per photon. Our results suggest that the multiple exciton generation threshold in SWNTs can be close to the limit defined by energy conservation.
doi_str_mv	10.1021/nl100343j
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source	American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron states Exact sciences and technology Excitons and related phenomena Fullerenes and related materials Materials science Nanoscale materials and structures: fabrication and characterization Nanotubes Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Physics Visible and ultraviolet spectra
title	Multiple Exciton Generation in Single-Walled Carbon Nanotubes
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