Phonon-assisted electroluminescence from metallic carbon nanotubes and graphene.

S Essig, C W Marquardt, a Vijayaraghavan, M Ganzhorn, S Dehm, F Hennrich, F Ou, a a Green, C Sciascia, F Bonaccorso, K-P K-P Bohnen, H V Löhneysen, M M Kappes, P M Ajayan, M C Hersam, a C Ferrari, R Krupke, H V Löhneysen

    Research output: Contribution to journalArticlepeer-review


    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 pi* 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 approximately 1.6 +/- approximately 0.2 eV could indicate radiative decay under emission or absorption of optical phonons, respectively.
    Original languageEnglish
    Pages (from-to)1589-94
    Number of pages1494
    JournalNano Letters
    Issue number5
    Publication statusPublished - 2010


    • Carbon
    • Carbon: chemistry
    • Crystallization
    • Crystallization: methods
    • Electrochemistry
    • Electrochemistry: methods
    • Graphite
    • Graphite: chemistry
    • Luminescent Measurements
    • Luminescent Measurements: methods
    • Macromolecular Substances
    • Macromolecular Substances: chemistry
    • Materials Testing
    • Metals
    • Metals: chemistry
    • Molecular Conformation
    • Nanotechnology
    • Nanotechnology: methods
    • Nanotubes
    • Particle Size
    • Photons
    • Surface Properties
    • carbon nanotubes
    • electroluminescence
    • graphene
    • phonons


    Dive into the research topics of 'Phonon-assisted electroluminescence from metallic carbon nanotubes and graphene.'. Together they form a unique fingerprint.

    Cite this