Low-temperature-cured highly conductive composite of Ag nanowires & polyvinyl alcohol

doi:10.1088/1674-1056/26/7/078103

Abstract Flexible conductive films were fabricated from a low-temperature-cured, highly conductive composite of silver nanowires (as conducting filler) and polyvinyl alcohol (PVA, as binder). Sheet resistance of 0.12 Ω/sq, conductivity of 2.63×10⁴ S/cm, and contact resistance of 1.0 Ω/cm² were measured in the films, along with excellent resistance to scratching and good flexibility, making them suitable electrical contact materials for flexible optoelectronic devices. Effects of curing temperature, curing duration, film thickness, and nanowire length on the film's electrical properties were studied. Due to the abundance of hydroxyl groups on its molecular chains, the addition of PVA improves the film's flexibility and resistance to scratching. Increased nanowire density and nanowire length benefit film conductance. Monte Carlo simulation was used to further explore the impact of these two parameters on the conductivity. It was observed that longer nanowires produce a higher length-ratio of conducting routes in the networks, giving better film conductivity.

Keywords: conductive composite polyvinyl alcohol silver nanowires Monte Carlo simulation

Received: 26 February 2017
Revised: 22 March 2017
Accepted manuscript online:

PACS:	81.16.Be	(Chemical synthesis methods)
	78.67.-n	(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
	81.15.-z	(Methods of deposition of films and coatings; film growth and epitaxy)
	78.67.Uh	(Nanowires)

Fund: Project supported by the National Natural Science Foundation of China (Grant No.61306080),the Natural Science Foundation of Hunan Province,China (Grant No.2015JJ3143),and the Scientific and Technological Project of Hunan Provincial Development and Reform Commission,China.

Corresponding Authors: Conghua Zhou
E-mail: chzhou@csu.edu.cn

Cite this article:

Song He(何松), Xiang Zhang(张祥), Bingchu Yang(杨兵初), Xiaomei Xu(徐晓梅), Hui Chen(陈辉), Conghua Zhou(周聪华) Low-temperature-cured highly conductive composite of Ag nanowires & polyvinyl alcohol 2017 Chin. Phys. B 26 078103

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Low-temperature-cured highly conductive composite of Ag nanowires & polyvinyl alcohol

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