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Materials 2017, 10(3), 234; doi:10.3390/ma10030234

Low-Temperature, Solution-Processed, Transparent Zinc Oxide-Based Thin-Film Transistors for Sensing Various Solvents

Department of Electronic Engineering, National Chin-Yi University of Technology, No. 57, Section 2, Zhongshan Road, Taiping District, Taichung 41170, Taiwan
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Academic Editor: Dirk Lehmhus
Received: 28 July 2016 / Revised: 28 July 2016 / Accepted: 22 February 2017 / Published: 26 February 2017
(This article belongs to the Special Issue Advances in Bendable and Soft Material Film)
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Abstract

A low temperature solution-processed thin-film transistor (TFT) using zinc oxide (ZnO) film as an exposed sensing semiconductor channel was fabricated to detect and identify various solution solvents. The TFT devices would offer applications for low-cost, rapid and highly compatible water-soluble detection and could replace conventional silicon field effect transistors (FETs) as bio-sensors. In this work, we demonstrate the utility of the TFT ZnO channel to sense various liquids, such as polar solvents (ethanol), non-polar solvents (toluene) and deionized (DI) water, which were dropped and adsorbed onto the channel. It is discussed how different dielectric constants of polar/non-polar solvents and DI water were associated with various charge transport properties, demonstrating the main detection mechanisms of the thin-film transistor. View Full-Text
Keywords: thin-film transistor (TFT); zinc oxide (ZnO); bio-sensor; transparent conducting oxide (TCO); polar solvent thin-film transistor (TFT); zinc oxide (ZnO); bio-sensor; transparent conducting oxide (TCO); polar solvent
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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You, H.-C.; Wang, C.-J. Low-Temperature, Solution-Processed, Transparent Zinc Oxide-Based Thin-Film Transistors for Sensing Various Solvents. Materials 2017, 10, 234.

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