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Electroluminescence from chirality-sorted (9,7)-semiconducting carbon nanotube devices

Pfeiffer, Martin H. P. and Stürzl, Ninette and Marquardt, Christoph W. and Engel, Michael and Dehm, Simone and Hennrich, Frank and Kappes, Manfred M. and Lemmer, Uli and Krupke, Ralph (2011):
Electroluminescence from chirality-sorted (9,7)-semiconducting carbon nanotube devices.
In: Optics Express, pp. A1184-A1189, 19, (S6), ISSN 1094-4087, [Online-Edition: http://dx.doi.org/10.1364/OE.19.0A1184],
[Article]

Abstract

We have measured the electroluminescence and photoluminescence of (9,7)-semiconducting carbon nanotube devices and demonstrate that the electroluminescence wavelength is determined by the nanotube’s chiral index (n,m). The devices were fabricated on Si3N4-membranes by dielectrophoretic assembly of tubes from monochiral dispersion. Electrically driven (9,7)-devices exhibit a single Lorentzian-shaped emission peak at 825 nm in the visible part of the spectrum. The emission could be assigned to the excitonic E22 interband-transition by comparison of the electroluminescence spectra with corresponding photoluminescence excitation maps. We show a linear dependence of the EL peak width on the electrical current, and provide evidence for the inertness of Si3N4 surfaces with respect to the nanotubes optical properties.

Item Type: Article
Erschienen: 2011
Creators: Pfeiffer, Martin H. P. and Stürzl, Ninette and Marquardt, Christoph W. and Engel, Michael and Dehm, Simone and Hennrich, Frank and Kappes, Manfred M. and Lemmer, Uli and Krupke, Ralph
Title: Electroluminescence from chirality-sorted (9,7)-semiconducting carbon nanotube devices
Language: English
Abstract:

We have measured the electroluminescence and photoluminescence of (9,7)-semiconducting carbon nanotube devices and demonstrate that the electroluminescence wavelength is determined by the nanotube’s chiral index (n,m). The devices were fabricated on Si3N4-membranes by dielectrophoretic assembly of tubes from monochiral dispersion. Electrically driven (9,7)-devices exhibit a single Lorentzian-shaped emission peak at 825 nm in the visible part of the spectrum. The emission could be assigned to the excitonic E22 interband-transition by comparison of the electroluminescence spectra with corresponding photoluminescence excitation maps. We show a linear dependence of the EL peak width on the electrical current, and provide evidence for the inertness of Si3N4 surfaces with respect to the nanotubes optical properties.

Journal or Publication Title: Optics Express
Volume: 19
Number: S6
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 08 Nov 2011 10:31
Official URL: http://dx.doi.org/10.1364/OE.19.0A1184
Identification Number: doi:10.1364/OE.19.0A1184
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