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

Autor:	Pfeiffer, Martin H. P., Stürzl, Ninette, Marquardt, Christoph W., Engel, Michael, Dehm, Simone, Hennrich, Frank, Kappes, Manfred M., Lemmer, Uli, Krupke, Ralph
Rok vydání:	2011
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1364/OE.19.0A1184
Popis:	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. Comment: 6 pages, 3 figures, submitted to Optics Express
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1107.5590 Zobrazit plný text záznamu View this record from Arxiv