1. Schottky diodes using as-grown single-walled carbon nanotube ensembles.
- Author
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Dissanayake, D. M. N. M. and Zhaohui Zhong
- Subjects
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SCHOTTKY barrier diodes , *FABRICATION (Manufacturing) , *RECTIFYING circuits , *OPTOELECTRONIC devices manufacturing , *ELECTRIC properties of single walled carbon nanotubes , *STATISTICAL ensembles - Abstract
We demonstrate rectifying Schottky diodes fabricated using as-grown single-walled carbon nanotubes (SWNT) ensembles, without removing the metallic SWNTs, for optoelectronic device applications. The SWNTs are contact by a low work-function metal through a high-bandgap charge-blocking layer (ZnO) resulting in highly-nonlinear current-voltage properties compared to control ensemble SWNT devices, fabricated without a charge-blocking layer, which show resistive behaviour. This significant improvement in diode behaviour is obtained by reducing source-drain leakage from the metallic SWNTs using the charge-blocking layer which channels charge transport via the semiconducting SWNTs. Moreover, we explore an alternative method of creating the charge barrier layer via oxidizing a thin film of Zn deposited on directly on the SWNTs which could potentially reduce cost and increasing scalability of this technique to obtain highly rectifying diodes from as-grown ensemble SWNTs. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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