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

被引：17
|
作者：
Sarker, Biddut K.
Arif, M.
Khondaker, Saiful I. [1 ]
机构：
[1] Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32826 USA
来源：
CARBON | 2010年 / 48卷 / 05期
基金：
美国国家科学基金会;
关键词：
NANOTUBES; PHOTOCONDUCTIVITY;
D O I：
10.1016/j.carbon.2009.11.065
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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
引用
收藏
页码：1539 / 1544
页数：6
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