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ACS Nano. 2008 Dec 23;2(12):2445-52. doi: 10.1021/nn800708w.

Thin film nanotube transistors based on self-assembled, aligned, semiconducting carbon nanotube arrays.

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1
IBM T. J. Watson Research Center, Yorktown Heights, NY 10598, USA.

Abstract

Thin film transistors (TFTs) are now poised to revolutionize the display, sensor, and flexible electronics markets. However, there is a limited choice of channel materials compatible with low-temperature processing. This has inhibited the fabrication of high electrical performance TFTs. Single-walled carbon nanotubes (CNTs) have very high mobilities and can be solution-processed, making thin film CNT-based TFTs a natural direction for exploration. The two main challenges facing CNT-TFTs are the difficulty of placing and aligning CNTs over large areas and low on/off current ratios due to admixture of metallic nanotubes. Here, we report the self-assembly and self-alignment of CNTs from solution into micron-wide strips that form regular arrays of dense and highly aligned CNT films covering the entire chip, which is ideally suitable for device fabrication. The films are formed from pre-separated, 99% purely semiconducting CNTs and, as a result, the CNT-TFTs exhibit simultaneously high drive currents and large on/off current ratios. Moreover, they deliver strong photocurrents and are also both photo- and electroluminescent.

PMID:
19206278
DOI:
10.1021/nn800708w
[Indexed for MEDLINE]
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