Bright infrared emission from electrically induced excitons in carbon nanotubes.


Journal Article

We used the high local electric fields at the junction between the suspended and supported parts of a single carbon nanotube molecule to produce unusually bright infrared emission under unipolar operation. Carriers were accelerated by band-bending at the suspension interface, and they created excitons that radiatively recombined. This excitation mechanism is approximately 1000 times more efficient than recombination of independently injected electrons and holes, and it results from weak electron-phonon scattering and strong electron-hole binding caused by one-dimensional confinement. The ensuing high excitation density allows us to observe emission from higher excited states not seen by photoexcitation. The excitation mechanism of these states was analyzed.

Full Text

Duke Authors

Cited Authors

  • Chen, J; Perebeinos, V; Freitag, M; Tsang, J; Fu, Q; Liu, J; Avouris, P

Published Date

  • November 2005

Published In

Volume / Issue

  • 310 / 5751

Start / End Page

  • 1171 - 1174

PubMed ID

  • 16293757

Pubmed Central ID

  • 16293757

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.1119177


  • eng