title: Electroluminescence from single-wall carbon nanotube network transistors.
abstract: The electroluminescence (EL) properties from single-wall carbon nanotube network field-effect transistors (NNFETs) and small bundle carbon nanotube field effect transistors (CNFETs) are studied using spectroscopy and imaging in the near-infrared (NIR). At room temperature, NNFETs produce broad (approximately 180 meV) and structured NIR spectra, while they are narrower (approximately 80 meV) for CNFETs. EL emission from NNFETs is located in the vicinity of the minority carrier injecting contact (drain) and the spectrum of the emission is red shifted with respect to the corresponding absorption spectrum. A phenomenological model based on a Fermi-Dirac distribution of carriers in the nanotube network reproduces the spectral features observed. This work supports bipolar (electron-hole) current recombination as the main mechanism of emission and highlights the drastic influence of carrier distribution on the optoelectronic properties of carbon nanotube films.
authors.affiliation: Regroupement Québécois sur les Matériaux de Pointe (RQMP), Département de Génie Physique, Ecole Polytechnique de Montréal, Montréal, Canada.
authors.forename: E
authors.initials: E
authors.lastname: Adam
authors.forename: C M
authors.initials: CM
authors.lastname: Aguirre
authors.forename: L
authors.initials: L
authors.lastname: Marty
authors.forename: B C
authors.initials: BC
authors.lastname: St-Antoine
authors.forename: F
authors.initials: F
authors.lastname: Meunier
authors.forename: P
authors.initials: P
authors.lastname: Desjardins
authors.forename: D
authors.initials: D
authors.lastname: Ménard
authors.forename: R
authors.initials: R
authors.lastname: Martel
mesh_terms: D004563:Electrochemistry; D049449:Luminescence; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D013053:Spectrophotometry; D014173:Transistors, Electronic
chemical_list: D037742:Nanotubes, Carbon