Channel-length-dependent transport and photovoltaic characteristics of carbon-nanotube-based, barrier-free bipolar diode.

Journal Article (Journal Article)

Carbon nanotube (CNT) diodes with different channel length between L = 0.6 μm to 3.5 μm are fabricated on the same tube, and the electric and photovoltaic characteristics are investigated. It is found that although the open voltage of the diode increases rapidly for channel length L less than 1.0 μm, it saturates for longer channel devices. On the other hand, the short circuit current of the diode exhibites a clear peak at intermediate channel length of about 1.5 μm, a large leakage current via tunneling for short channel device and significantly decreased current for long channel device due to the increased recombination and channel resistance. The optimal channel length for a CNT diode in photovoltaic application is thus determined to be about 1.5 μm.

Full Text

Duke Authors

Cited Authors

  • Yang, L; Wang, S; Zeng, Q; Zhang, Z; Li, Y; Zhou, W; Liu, J; Peng, L-M

Published Date

  • March 2012

Published In

Volume / Issue

  • 4 / 3

Start / End Page

  • 1154 - 1157

PubMed ID

  • 22324635

Pubmed Central ID

  • 22324635

Electronic International Standard Serial Number (EISSN)

  • 1944-8252

International Standard Serial Number (ISSN)

  • 1944-8244

Digital Object Identifier (DOI)

  • 10.1021/am201778x


  • eng