Essig, S. ; Marquardt, C. W. ; Vijayaraghavan, A. ; Ganzhorn, M. ; Dehm, S. ; Hennrich, F. ; Ou, F. ; Green, A. A. ; Sciascia, C. ; Bonaccorso, F. ; Bohnen, K.-P. ; Löhneysen, H. v. ; Kappes, M. M. ; Ajayan, P. M. ; Hersam, M. C. ; Ferrari, A. C. ; Krupke, R. (2010)
Phonon-Assisted Electroluminescence from Metallic Carbon Nanotubes and Graphene.
In: Nano Letters, 10 (5)
doi: 10.1021/nl9039795
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report on light emission from biased metallic single-wall carbon nanotube (SWNT), multiwall carbon nanotube (MWNT) and few-layer graphene (FLG) devices. SWNT devices were assembled from tubes with different diameters in the range 0.7−1.5 nm. They emit light in the visible spectrum with peaks at 1.4 and 1.8 eV. Similar peaks are observed for MWNT and FLG devices. We propose that this light emission is due to phonon-assisted radiative decay from populated π* band states at the M point to the Fermi level at the K point. Since for most carbon nanotubes as well as for graphene the energy of unoccupied states at the M point is close to 1.6 eV, the observation of two emission peaks at 1.6 ± 0.2 eV could indicate radiative decay under emission or absorption of optical phonons, respectively.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Essig, S. ; Marquardt, C. W. ; Vijayaraghavan, A. ; Ganzhorn, M. ; Dehm, S. ; Hennrich, F. ; Ou, F. ; Green, A. A. ; Sciascia, C. ; Bonaccorso, F. ; Bohnen, K.-P. ; Löhneysen, H. v. ; Kappes, M. M. ; Ajayan, P. M. ; Hersam, M. C. ; Ferrari, A. C. ; Krupke, R. |
| Art des Eintrags: | Bibliographie |
| Titel: | Phonon-Assisted Electroluminescence from Metallic Carbon Nanotubes and Graphene |
| Sprache: | Englisch |
| Publikationsjahr: | 20 April 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nano Letters |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1021/nl9039795 |
| Kurzbeschreibung (Abstract): | We report on light emission from biased metallic single-wall carbon nanotube (SWNT), multiwall carbon nanotube (MWNT) and few-layer graphene (FLG) devices. SWNT devices were assembled from tubes with different diameters in the range 0.7−1.5 nm. They emit light in the visible spectrum with peaks at 1.4 and 1.8 eV. Similar peaks are observed for MWNT and FLG devices. We propose that this light emission is due to phonon-assisted radiative decay from populated π* band states at the M point to the Fermi level at the K point. Since for most carbon nanotubes as well as for graphene the energy of unoccupied states at the M point is close to 1.6 eV, the observation of two emission peaks at 1.6 ± 0.2 eV could indicate radiative decay under emission or absorption of optical phonons, respectively. |
| Freie Schlagworte: | Carbon nanotubes; graphene; electroluminescence; phonons |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Nov 2011 11:48 |
| Letzte Änderung: | 05 Mär 2013 09:55 |
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