Effect of channel thickness on noise in organic electrochemical transistors

Congratulations to A.G. Polyravas, N. Schaefer, V.F. Curto, A.B. Calia, A. Guimera-Brunet, J.A. Garrido, & G.G. Malliaras on their publication entitled “Effect of channel thickness on noise in organic electrochemical transistors” that was recently published in Applied Physics Letters!

Organic electrochemical transistors (OECTs) have been widely used as transducers in electrophysiology and other biosensing applications. Their identifying characteristic is a transconductance that increases with channel thickness, and this provides a facile mechanism to achieve high signal amplification. However, little is known about their noise behavior. Here, we investigate noise and extract metrics for the signal-to-noise ratio and limit of detection in OECTs with different channel thicknesses. These metrics are shown to improve as the channel thickness increases, demonstrating that OECTs can be easily optimized to show not only high amplification, but also low noise.

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