Title

Near-Infrared Photoresponse In Single-Walled Carbon Nanotube/Polymer Composite Films

Abstract

We present a near-infrared photoresponse study of single-walled carbon nanotube/poly(3-hexylthiophene)-block-polystyrene polymer (SWCNT/P3HT-b-PS) composite films for different loading ratios of SWCNT in the polymer matrix. Compared to the pure SWCNT film, the photoresponse [(light current - dark current)/dark current] is much larger in the SWCNT/polymer composite films. The photoresponse is up to 157% when SWCNTs are embedded in P3HT-b-PS while for a pure SWCNT film it is only 40%. We also show that the photocurrent strongly depends on the position of the laser spot with maximum photocurrent occurring at the metal-film interface. We explain the photoresponse due to exciton dissociations and charge carrier separation caused by a Schottky barrier at the metallic electrode-SWCNT interface. © 2009 Elsevier Ltd. All rights reserved.

Publication Date

4-1-2010

Publication Title

Carbon

Volume

48

Issue

5

Number of Pages

1539-1544

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.carbon.2009.11.065

Socpus ID

75749143942 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/75749143942

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