Electrical properties of transparent conducting carbon nanotube films

doi:10.1007/s12200-009-0076-y

Front Optoelec Chin

2009, Vol. 2

Issue (4) : 425-428 https://doi.org/10.1007/s12200-009-0076-y

RESEARCH ARTICLE

Electrical properties of transparent conducting carbon nanotube films

Yanli ZHAO(

), Qiuyan MO

Wuhan National Laboratory for Optoelectronics, college of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

Single walled-carbon nanotube (SWCNT) thin film is one of the candidates for the next-generation flexible and transparent conductive thin film, which is a crucial component in various applications such as electrodes of flat-panel displays, solar cells, light emitting diodes, and touch panels. An intensive research work is underway to develop thin and flexible SWCNT films. The most important requirement of an SWCNT thin film is that it should show a low sheet resistance coupled with a high transparency. In this work, thin films of SWCNTs are prepared by vacuum filtration. The electrical properties of the as-prepared, annealed and HNO₃-treated SWCNT films have been investigated. It is found that the square resistance can be significantly changed upon anneal and HNO₃-treatment. A room-temperature ethanol alcohol sensor based on the SWCNT film has also been demonstrated.

Keywords transparent electrode single walled-carbon nanotube (SWCNT) film vacuum filtration

Corresponding Author(s): ZHAO Yanli,Email:yanlizhao@mail.hust.edu.cn

Issue Date: 05 December 2009

Cite this article:

Yanli ZHAO,Qiuyan MO. Electrical properties of transparent conducting carbon nanotube films[J]. Front Optoelec Chin, 2009, 2(4): 425-428.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-009-0076-y
https://academic.hep.com.cn/foe/EN/Y2009/V2/I4/425

Fig.1 Photographs taken by an ordinary camera. (a) 5 mL SWCNT film; (b) 10 mL SWCNT film; (c) 20 mL SWCNT film; (d) 35 mL SWCNT film; (e) 50 mL SWCNT film; (f) 200 mL SWCNT film

Fig.2 AFM images of SWCNT transparent conducting films (scar bar is 1 μm). (a) As-prepared 5 mL SWCNT film; (b) annealed 5 mL SWCNT film; (c) HNO-treated 5 mL SWCNT film; (d) annealed 10 mL SWCNT film

Fig.3 Change of square resistance () for SWCNT films under different post- treatments. The inset shows the low temperature measurement for the HNO-treated 20 mL SWCNT film

Fig.4 Sensitivity of SWCNT thin films to ethanol alcohol vapor at room temperature

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