Thick-Film Organic Electrochemical Transistor (OECT) Sensors For The Detection Of Hydrogen Peroxide

Identifier:  TFM:589

Handle: https://hdl.handle.net/20.500.11797/TFM589

Authors:  Ait Yazza, Adil

Abstract:
Organic electrochemical transistors (OECTs) have gained great interest in the last few years as bio- and electrochemical sensors, due to their outstanding analytical performance, versatility, stability and easiness of fabrication. While thin-film OECTs have been studied extensively ever since the first device was reported more than three decades ago, thick film OECTs have not yet been explored. In this report, a simple approach for developing and testing thick-film OECT using a paper substrate is presented. The channel -cast by bar-coating the semiconducting polymer poly(3,4-ethylenedioxythiophene) doped with poly-styrene sulfonate (PEDOT:PSS) on a paper sputtered with gold- shows a thickness in the order of 10 μm, well above the conventional channels. This device is characterized by electrochemical techniques, displaying a high transconductance that exceeds 10 mS. The sensor was tested for the detection of H2O2 by building a transistor in a depletion mode where a Pt electrode was used as a gate. The outstanding analytical performance, as shown by the enhanced sensitivity and limits of detection, is presented and future applications of these type of devices are discussed.