Physics – Condensed Matter – Materials Science
Scientific paper
2008-12-28
Appl. Phys. Lett. 94, 042110 (2009)
Physics
Condensed Matter
Materials Science
6 pages, 3 figures, 1 table
Scientific paper
10.1063/1.3075957
We present a near IR photoresponse study of large area multi-walled carbon nanotube/poly(3-hexylthiophene)-block-polystyrene polymer (MWNT/P3HT-b-PS) nanocomposite films for different loading ratio of MWNT into the polymer matrix. We show that the photocurrent strongly depends on the position of the laser spot with maxiumum photocurrent occurring at the metal - film interface. In addition, compared to the pure MWNT film, the photoresponse is much larger in the MWNT/polymer composite films. The time constant for the photoresponse is slow and varies between 0.6 and 1.2 seconds. We explain the photoresponse by Schottky barrier modulation at the metal - film interface.
Huo Qun
Khondaker Saiful I.
Liu Li-wei
Stokes Paul
Zhai Lei
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