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Influence of Humidity on the Performance of Composite Polymer Electrolyte-Gated Field-Effect Transistors and Circuits

Marques, Gabriel Cadilha and von Seggern, Falk and Dehm, Simone and Breitung, Ben and Hahn, Horst and Dasgupta, Subho and Tahoori, Mehdi B and Aghassi-Hagmann, Jasmin (2019) Influence of Humidity on the Performance of Composite Polymer Electrolyte-Gated Field-Effect Transistors and Circuits. In: IEEE TRANSACTIONS ON ELECTRON DEVICES, 66 (5). pp. 2202-2207.

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Official URL: https://doi.org/10.1109/TED.2019.2903456


In the domain of printed electronics (PE), field-effect transistors (FETs) with an oxide semiconductor channel are very promising. In particular, the use of high gate-capacitance of the composite solid polymer electrolytes (CSPEs) as a gate-insulator ensures extremely low voltage requirements. Besides high gate capacitance, such CSPEs are proven to be easily printable, stable in air over wide temperature ranges, and possess high ion conductivity. These CSPEs can be sensitive to moisture, especially for high surface-to-volume ratio printed thin films. In this paper, we provide a comprehensive experimental study on the effect of humidity on CSPE-gated single transistors. At the circuit level, the performance of ring oscillators (ROs) has been compared for various humidity conditions. The experimental results of the electrolyte-gatedFETs (EGFETs) demonstrate rather comparable currents between 30%-90% humidity levels. However, the shifted transistor parameters lead to a significant performance change of the RO frequency behavior. The study in this paper shows the need of an impermeable encapsulation for the CSPE-gated FETs to ensure identical performance at all humidity conditions.

Item Type: Journal Article
Additional Information: copyright for this article belongs to IEEE
Keywords: Composite solid polymer electrolytes (CSPEs); electrolyte gating; humidity effects; oxide electronics; ring oscillators (ROs)
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 10 Jun 2020 10:34
Last Modified: 10 Jun 2020 10:34
URI: http://eprints.iisc.ac.in/id/eprint/62877

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