Photocurrent generation in random networks of multiwall-carbon-nanotubes grown by an "all-laser" process

M. A. El Khakani, V. Le Borgne, B. Assa, F. Rosei, C. Scilletta, E. Speiser, M. Scarselli, P. Castrucci, M. De Crescenzi

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We report photocurrent generation in entangled networks of multiwall-carbon nanotubes (MWCNTs) grown on TiN/Si substrates by an all-laser process. By integrating these MWCNTs into planar devices, we demonstrate that they generate photocurrent over all the visible and near-ultraviolet range, with maximum efficiency around 420 nm. Photocurrent is obtained even at zero applied voltage, pointing to a true photovoltaic (PV) effect. The extracted photocurrent as a function of applied voltage exhibits nonlinear behavior for voltages 2 V, suggesting that the devices do not behave as pure photoresistances. Other mechanisms (e.g., Schottky barriers imbalance) are invoked to describe current flow in these PV devices.

Original languageEnglish
Article number083114
JournalApplied Physics Letters
Volume95
Issue number8
DOIs
Publication statusPublished - 7 Sep 2009

    Fingerprint

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

El Khakani, M. A., Le Borgne, V., Assa, B., Rosei, F., Scilletta, C., Speiser, E., Scarselli, M., Castrucci, P., & De Crescenzi, M. (2009). Photocurrent generation in random networks of multiwall-carbon-nanotubes grown by an "all-laser" process. Applied Physics Letters, 95(8), [083114]. https://doi.org/10.1063/1.3211958