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Flexible organic ion-gated transistors with low operating voltage and light-sensing application

Mona Azimi, Arunprabaharan Subramanian, Nur Adilah Roslan and Fabio Cicoira

Article (2021)

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Ion-gated transistors are attracting significant attention due to their low operating voltage (<1 V) and modulation of charge carrier density by ion-gating media. Here we report flexible organic ion-gated transistors based on the high mobility donor–acceptor conjugated copolymer poly[4-(4,4-dihexadecyl 4H-cyclopenta[1,2-b:5,4-b']-dithiophen-2-yl)-alt[1,2,5]thiadiazolo[3,4c]pyridine](PCDTPT) and the ionic liquid [1-ethyl-3 methylimidazolium bis(trifluoromethylsulfonyl)imide] as the ion-gating medium. Electrical characteristics of devices made on both [rigid (SiO2/Si) and flexible (polyimide (PI))] substrates showed very similar values of hole mobility (∼1 cm2 V−1 s−1) and ON–OFF ratio (∼105). Flexible ion-gated transistors showed good mechanical stability at different bending curvature radii and under repetitive bending cycles. The mobility of flexible ion-gated transistors remained almost unchanged upon bending. After 1000 bending cycles the mobility decreased by 20% of its initial value. Flexible photodetectors based on PCDTPT ion-gated transistors showed photosensitivity and photoresponsivity values of 0.4 and 93 AW−1.

Uncontrolled Keywords

ion-gated transistor, donor–acceptor conjugated copolymer, poly[4-(4, 4-dihexadecyl 4H-cyclopenta[1, 2-b:5, 4-b′]-dithiophen-2-yl)-alt[1, 2, 5]thiadiazolo[3, 4c]pyridine](PCDTPT), flexible electronics, Ionic liquids

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
1800 Chemical engineering > 1802 Biochemical engineering
Department: Department of Chemical Engineering
Research Center: Other
Funders: GRSNG / NSERC - Discovery Grant, Institut de l’Energie Trottier, Canada ASEAN scholarship, MNT Program - CMC Microsystems
PolyPublie URL: https://publications.polymtl.ca/9316/
Journal Title: Journal of Physics: Materials (vol. 4, no. 2)
Publisher: IOP Publishing
DOI: 10.1088/2515-7639/abd018
Official URL: https://doi.org/10.1088/2515-7639/abd018
Date Deposited: 27 Apr 2023 14:59
Last Modified: 05 Apr 2024 17:13
Cite in APA 7: Azimi, M., Subramanian, A., Roslan, N. A., & Cicoira, F. (2021). Flexible organic ion-gated transistors with low operating voltage and light-sensing application. Journal of Physics: Materials, 4(2), 024001 (11 pages). https://doi.org/10.1088/2515-7639/abd018


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