TY - JOUR
T1 - A guide for the characterization of organic electrochemical transistors and channel materials
AU - Ohayon, David
AU - Druet, Victor
AU - Inal, Sahika
N1 - KAUST Repository Item: Exported on 2023-01-17
Acknowledged KAUST grant number(s): ORA-2021-CRG10-4650, OSR-2019-CRG8-4095, REI/1/5130-01
Acknowledgements: The authors thank Abdulelah Saleh for his assistance on the table of contents image. This publication is based upon work supported by King Abdullah University of Science and Technology under Award No. ORA-2021-CRG10-4650, OSR-2019-CRG8-4095, and REI/1/5130-01.
PY - 2023/1/13
Y1 - 2023/1/13
N2 - The organic electrochemical transistor (OECT) is one of the most versatile devices within the bioelectronics toolbox, with its compatibility with aqueous media and the ability to transduce and amplify ionic and biological signals into an electronic output. The OECT operation relies on the mixed (ionic and electronic charge) conduction properties of the material in its channel. With the increased popularity of OECTs in bioelectronics applications and to benchmark mixed conduction properties of channel materials, the characterization methods have broadened somewhat heterogeneously. We intend this review to be a guide for the characterization methods of the OECT and the channel materials used. Our review is composed of two main sections. First, we review techniques to fabricate the OECT, introduce different form factors and configurations, and describe the device operation principle. We then discuss the OECT performance figures of merit and detail the experimental procedures to obtain these characteristics. In the second section, we shed light on the characterization of mixed transport properties of channel materials and describe how to assess films’ interactions with aqueous electrolytes. In particular, we introduce experimental methods to monitor ion motion and diffusion, charge carrier mobility, and water uptake in the films. We also discuss a few theoretical models describing ion–polymer interactions. We hope that the guidelines we bring together in this review will help researchers perform a more comprehensive and consistent comparison of new materials and device designs, and they will be used to identify advances and opportunities to improve the device performance, progressing the field of organic bioelectronics.
AB - The organic electrochemical transistor (OECT) is one of the most versatile devices within the bioelectronics toolbox, with its compatibility with aqueous media and the ability to transduce and amplify ionic and biological signals into an electronic output. The OECT operation relies on the mixed (ionic and electronic charge) conduction properties of the material in its channel. With the increased popularity of OECTs in bioelectronics applications and to benchmark mixed conduction properties of channel materials, the characterization methods have broadened somewhat heterogeneously. We intend this review to be a guide for the characterization methods of the OECT and the channel materials used. Our review is composed of two main sections. First, we review techniques to fabricate the OECT, introduce different form factors and configurations, and describe the device operation principle. We then discuss the OECT performance figures of merit and detail the experimental procedures to obtain these characteristics. In the second section, we shed light on the characterization of mixed transport properties of channel materials and describe how to assess films’ interactions with aqueous electrolytes. In particular, we introduce experimental methods to monitor ion motion and diffusion, charge carrier mobility, and water uptake in the films. We also discuss a few theoretical models describing ion–polymer interactions. We hope that the guidelines we bring together in this review will help researchers perform a more comprehensive and consistent comparison of new materials and device designs, and they will be used to identify advances and opportunities to improve the device performance, progressing the field of organic bioelectronics.
UR - http://hdl.handle.net/10754/687113
UR - http://xlink.rsc.org/?DOI=D2CS00920J
U2 - 10.1039/d2cs00920j
DO - 10.1039/d2cs00920j
M3 - Article
C2 - 36637165
SN - 0306-0012
JO - Chemical Society Reviews
JF - Chemical Society Reviews
ER -