期刊
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷 206, 期 -, 页码 55-60出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mseb.2016.01.004
关键词
Carbon nanotubes; Nonlinear current-voltage behavior; Hopping effect; Joule-heating
资金
- National Natural Science Foundation of China [51377157]
- Guangdong Innovative Research Team Program [2011D052]
- Key Laboratory of Guangdong Province [2014B030301014]
- Shenzhen Peacock Plan for Innovative Reasearch Team [KYPT20121228160843692]
Nonlinear current-voltage (I-V) behavior is a typical feature of polymeric composites containing conductor or semiconductor fillers, which are desired to handle the transient voltage and electrostatic discharge (ESD) of microelectronic devices. In this paper, the mechanism of nonlinear behavior of carbon nano tubes (CNTs) filled polymer composites in the applied electric field was explored. The I-V curves of the composites exhibited three regions. The variation of current at low voltages (region I) is linear. Under relatively higher voltages (region II), the variation is nonlinear and grows rapidly with voltage. As the voltage is further increased, the I-V curve is still non-linear (region III), but the growth rate is significantly slowed down. The I-V characteristics in the above three regions were analyzed systematically based on the calculation of the electrons hopping from the conduction band of CNTs to epoxy, the induced current under electric field, as well as Joule-heating and tunneling effect. (C) 2016 Elsevier B.V. All rights reserved.
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