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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Emerging Topics in Chemical and Polymer Physics, New Instruments and Methods I

CPP 34.8: Vortrag

Donnerstag, 21. März 2024, 11:45–12:00, H 0106

Dedoping of PEDOT:PSS using Amines to shift the Threshold Voltage in OECTs — •Laura Teuerle, Hans Kleemann, and Karl Leo — IAPP Dresden

With an increasing importance of organic semiconductors, due to their flexibility, transparency and possible biocompatibility, more applications and device classes emerge.

One of them - the organic electochemical transistor (OECT) can be utilized in neuromorphic computing and printed digital logic. The most commonly used -PEDOT:PSS is a p-type semiconductor, which leads to normally-on type transistors. However, normally-off type devices are needed for a successful application in logic circuits.

We show that a chemical dedoping method involving amines leads to a shift in threshold voltage to zero and even negative in the corresponding devices.

Different processing methods for the dedoping process and device building are studied, which involve photolithography, inkjet printing and spraycoating. Furthermore, IV measurements for device characterization were taken.

The results show that the studied chemical dedoping of - PEDOT:PSS can be a viable method to create normally-off type transistors for an application in logic circuits.

Keywords: OECT; PEDOT:PSS; de-doping; spraycoating; inkjet-printing