Regensburg 2013 – scientific programme

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O: Fachverband Oberflächenphysik

O 73: Organic Electronics and Photovoltaics II (jointly with CPP, DS, and HL)

O 73.11: Talk

Thursday, March 14, 2013, 18:00–18:15, H34

Polymer semiconductors for electro chemical measurements in biosensing applications — •Martin Schmid — Helmholtz Zentrum München, Munich, Germany

There is an increasing need in medical diagnosis for reliable fast and simple biosensing devices. Sensors based on organic semiconducting polymers, which are suitable for large-area, low-cost, flexible, and eventually single-use throwaway electronics, provide a unique opportunity in that sense. We report on organic field-effect transistors (OFETs) with regioregular poly(3-hexylthiophene) (P3HT) operable at low-voltages in liquid solutions, suitable for in vitro biosensing applications. Measurements in electrolytes have shown that the performance of the transistors did not deteriorate and they can be directly used as ion-sensitive transducers. Here we show the detection of pH alterations in a wide linear range. With the intention to use the sensors as biosensing devices in biomedical applications, the experiments were performed under physiological conditions and temperature.