Title

Near-infrared photoresponse in single-walled carbon nanotube/polymer composite films

Authors

Authors

B. K. Sarker; M. Arif;S. I. Khondaker

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Carbon

Keywords

CONJUGATED BLOCK-COPOLYMERS; NANOTUBES; PHOTOCONDUCTIVITY; Chemistry, Physical; Materials Science, Multidisciplinary

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 [flight 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 carner separation caused by a Schottky barrier at the metallic electrode-SWCNT interface (C) 2009 Elsevier Ltd All rights reserved

Journal Title

Carbon

Volume

48

Issue/Number

5

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

1539

Last Page

1544

WOS Identifier

WOS:000275636000028

ISSN

0008-6223

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