All-printed and stretchable organic electrochemical transistors using a hydrogel electrolyte

Abstract

Stretchable devices are expected to play a fundamental role in bioelectronics. Solution-processable conducting materials are desirable because of their low cost and fast device production. Herein, we report the fabrication...

Effect of ionic conductivity of electrolyte on printed planar and vertical organic electrochemical transistors

“…Subsequently, to obtain a Ag/AgCl gate electrode, the silver gate electrode was chlorinated by exposing it to a 5% NaClO solution and rinsed with deionized water for 10 min. 28 The use of Ag/AgCl as a nonpolarizable electrode contributes to effective gating because of the minimized voltage drop at the gate/electrolyte interface. 44 Subsequently, for planar configuration, the source and drain electrodes were patterned and baked at 130 °C for 20 min.…”

Electrical and mechanical stability of flexible, organic electrolyte-gated transistors based on iongel and hydrogels

“…Semi-solid electrolytes, including iongels, hydrogels, and polymer electrolytes, have been reported for applications in organic and inorganic flexible and stretchable EGTs. 36,[57][58][59] Recently, our group reported fully stretchable OECTs based on PEDOT-PSS, using printed hydrogels as the gating media. 57 Biodegradable and biocompatible iongels have been utilized for flexible EGTs with an application for electrocardiogram recording.…”

“…36,[57][58][59] Recently, our group reported fully stretchable OECTs based on PEDOT-PSS, using printed hydrogels as the gating media. 57 Biodegradable and biocompatible iongels have been utilized for flexible EGTs with an application for electrocardiogram recording. 36 Agarose based hydrogel have also been used to fabricate flexible pressure sensors with longterm stability and sensitivity in the low-pressure regime (for several hundred Pascals).…”

Fully Screen‐Printed Stretchable Organic Electrochemical Transistors

“…[40] Recently, Kim et al reported on extrusion printed stretchable OECTs with an on/off ratio of 800. [41] However, there are no reports on scalable printing processes for complex stretchable OECTs, which would require a variety of adapted functional inks. [42] Here, we report on the first fully screen-printed stretchable OECTs.…”