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Research Article

Large capacitance and fast polarization response of thin electrolyte dielectrics by spin coating for two-dimensional MoS2 devices

Wu Zan, Qiaochu Zhang, Hu Xu, Fuyou Liao, Zhongxun Guo, Jianan Deng, Jing Wan( ), Hao Zhu, Lin Chen, Qingqing Sun, Shijin Ding, Peng Zhou, Wenzhong Bao( ), David Wei Zhang
State Key Laboratory of ASIC and SystemFudan UniversityShanghai200433China
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Abstract

A spin-coating method was applied to obtain thinner and smoother PEO/LiClO4 polymer electrolyte films (EFs) with a lower level of crystallization than those obtained using a drop-casting method. When the applied frequency was as high as 10 kHz, the specific capacitance of such EFs with thicknesses of 1.5 μm was on the order of 1 μF·cm-2, a value larger than most of the previously reported results achieved from the same material. We then combined the thin EFs with two-dimensional (2D) materials to fabricate a MoS2 transistor with a top gate right above the channel, defined by a shadow-mask method, and an inverter device. This transistor showed excellent static characteristics and the inverter device showed excellent switching performance at 100 Hz, which indicates a fast polarization response of the thin EFs. Such device architecture is suitable for future low power and flexible electronics based on 2D materials.

Keywords

two-dimensional materialsMoS2electrolyte dielectricsfast polarization response

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Nano Research
Volume 11 Issue 7,
July 2018
Pages 3739-3745
DOI: 10.1007/s12274-017-1945-0
Cite this article:
Zan W, Zhang Q, Xu H, et al. Large capacitance and fast polarization response of thin electrolyte dielectrics by spin coating for two-dimensional MoS2 devices. Nano Research, 2018, 11(7): 3739-3745. https://doi.org/10.1007/s12274-017-1945-0

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Received: 11 September 2017
Revised: 02 November 2017
Accepted: 29 November 2017
Published: 02 August 2018
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2017
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