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

Pfeiffer, Martin H. P. ; Stürzl, Ninette ; Marquardt, Christoph W. ; Engel, Michael ; Dehm, Simone ; Hennrich, Frank ; Kappes, Manfred M. ; Lemmer, Uli ; Krupke, Ralph (2011)
Electroluminescence from chirality-sorted (9,7)-semiconducting carbon nanotube devices.
In: Optics Express, 19 (S6)
doi: 10.1364/OE.19.0A1184
Article, Bibliographie

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. ; Stürzl, Ninette ; Marquardt, Christoph W. ; Engel, Michael ; Dehm, Simone ; Hennrich, Frank ; Kappes, Manfred M. ; Lemmer, Uli ; Krupke, Ralph
Type of entry: Bibliographie
Title: Electroluminescence from chirality-sorted (9,7)-semiconducting carbon nanotube devices
Language: English
Date: 22 September 2011
Journal or Publication Title: Optics Express
Volume of the journal: 19
Issue Number: S6
DOI: 10.1364/OE.19.0A1184
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.

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
Last Modified: 05 Mar 2013 09:55
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