Space-charge-limited current in nanowires depleted by oxygen adsorption

Y. Gu, L. J. Lauhon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

The effects of oxygen adsorption on the conductivity and carrier transport mechanisms in CdS nanowires were established through variable temperature electrical transport and photoconductivity measurements. n -type CdS nanowires were found to be significantly less conductive in the ambient air than in the vacuum due to electron depletion induced by adsorbed oxygen. The current-voltage characteristics of depleted nanowires exhibited a power law behavior consistent with space-charge-limited conduction in the presence of traps. Analysis of the voltage and temperature dependencies of the space-charge-limited current showed that the nanowire surface traps are exponentially distributed in energy with a characteristic depth of ∼0.28±0.04 eV.

Original languageEnglish (US)
Article number143102
JournalApplied Physics Letters
Volume89
Issue number14
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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