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

    Authors

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

    Comments

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    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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