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Organic electrochemical transistors based on PEDOT with different anionic polyelectrolyte dopants
- Inal, Sahika, Rivnay, Jonathan, Hofmann, Anna I., Uguz, Ilke, Mumtaz, Muhammad, Katsigiannopoulos, Dimitrios, Brochon, Cyril, Cloutet, Eric, Hadziioannou, Georges, Malliaras, George G.
- Journal of polymer science 2016 v.54 no.2 pp. 147-151
- styrene, electrochemistry, anions, polymers, molecular weight, stabilizers
- Recent applications of organic electrochemical transistors (OECTs) in bioelectronics motivate the search for new materials with mixed electronic and ionic conductivity. We investigate the characteristics of a series of poly(3,4‐ethylenedioxythiophene) (PEDOT)‐based materials with a new class of anionic polyelectrolytes used as dopants and stabilizers, replacing the traditionally used poly(styrene sulfonate) (PSS). We show that the backbone of the polyanion plays a major role in determining device performance, while its molecular weight and the counter ion used during PEDOT synthesis play a less important role. We find that transconductance increases with the degree of swelling of the film, consistent with enhanced ion transport. Finally, we identify a polymer that offers performance close to the state‐of‐the‐art. This work highlights the importance of the polyanion phase as a means to control OECT performance. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 147–151