Title: Temperature-dependent electrical and photo-sensing properties of horizontally-oriented carbon nanotube networks synthesized by sandwich-growth microwave plasma chemical vapor deposition
Authors: Teng, I-Ju
Hsu, Hui-Lin
Jian, Sheng-Rui
Wang, Li-Chun
Chen, Kai-Ling
Kuo, Cheng-Tzu
Pan, Fu-Ming
Wang, Wei-Hsiang
Juang, Jenh-Yih
Department of Materials Science and Engineering
Department of Electrophysics
Keywords: Electrical properties;Photo-sensing properties;Carbon nanotube networks (CNT-NWs);CNT-NW-assisted devices;Microwave plasma chemical vapor deposition;Sandwich-growth;Horizontally-oriented interconnected
Issue Date: 1-Feb-2013
Abstract: The electrical and photo-sensing properties of horizontally-oriented interconnected carbon nanotube networks (CNT-NWs) prepared by means of a microwave plasma chemical vapor deposition sandwich-growth process are investigated. The temperature-dependent dark and illuminated current-voltage and transfer characteristics of CNT-NW-assisted devices are measured. Results show that the current-voltage characteristics of the devices exhibit nonlinear behavior, and the current can be further modulated by a gate voltage, revealing p-type semiconducting behavior with a device mobility of similar to 14.5 cm(2)/V.s and an on-off current ratio of -10(3). Moreover, when the CNT-NW-assisted devices are irradiated with 1.25-25 mu m infrared (IR) from 300 to 11 K, the photo currents increase approximately 1.1- to 2.7-fold compared to the dark currents at +/- 2 V bias voltage. Such results demonstrate that the presented CNT-NWs have high potential for IR photo-sensor applications. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.tsf.2012.09.019
ISSN: 0040-6090
DOI: 10.1016/j.tsf.2012.09.019
Volume: 529
Begin Page: 190
End Page: 194
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