Figure 3. Doping and dedoping of PEDOT in an OECT. Left: Without gate-voltage PEDOT is doped and highly conductive for electrons, which enables a source-drain-current. Right: When a gate voltage is applied, metal cations migrate into the semiconductor and compensate the negative charges of the PSS molecules, resulting in a reduction of the PEDOT molecules (= dedoping) and a decrease in the source-drain-current

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Organic Electrochemical Transistors (OECTs) - Hands-on Experiment and Teaching Materials

Dustin Freimuth, Xuqiang Xu, Jana Zaumseil, Silvia Janietz, Amitabh Banerji

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