Influence of Device Geometry on Sensor Characteristics of Planar Organic Electrochemical Transistors

• Published in: Advanced materials (Weinheim) Vol. 22; no. 9; pp. 1012 - 1016
• Main Authors: Cicoira, Fabio, Sessolo, Michele, Yaghmazadeh, Omid, DeFranco, John A., Yang, Sang Yoon, Malliaras, George G.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 05-03-2010; WILEY‐VCH Verlag; Wiley-VCH Verlag
• Subjects: biosensors; conducting polymers; electrochemical transistors; Electrochemistry - instrumentation; Electrodes; Engineering Sciences; Equipment Design; Equipment Failure Analysis; hydrogen peroxide; Micro and nanotechnologies; Microelectronics; Organic Chemicals - chemistry; organic electronics; PEDOT:PSS; Transistors, Electronic; biosensors; organic electronics; electrochemical transistors; conducting polymers; hydrogen peroxide; PEDOT:PSS
• ISSN: 0935-9648; 1521-4095
• DOI: 10.1002/adma.200902329

The response of PEDOT:PSS planar electrochemical transistors to H2O2 can be tuned by varying the ratio between the areas of the channel and the gate electrode. Devices with small gates show lower background signal and higher sensitivity. The detection range, on the other hand, is found to be rather independent of the gate/channel area ratio.