Printed, cost-effective and stable poly(3-hexylthiophene) electrolyte-gated field-effect transistors
Autor: | Zahra Gounani, Zsolt Miklos Kovacs Vajna, Rosaria Anna Picca, Francesco Modena, Mario Caironi, Amit Tewari, Ronald Österbacka, Fabrizio Antonio Viola, Axel Luukkonen, Gaetano Scamarcio, Davide Blasi, Fabrizio Torricelli, Luisa Torsi, Eleonora Macchia |
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Rok vydání: | 2020 |
Předmět: |
Materials science
business.industry Transistor Stacking 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Evaporation (deposition) 0104 chemical sciences Amorphous solid law.invention Organic semiconductor law Electrode Materials Chemistry Optoelectronics Field-effect transistor 0210 nano-technology business |
Zdroj: | Journal of Materials Chemistry C |
ISSN: | 2050-7534 |
DOI: | 10.1039/d0tc03342a |
Popis: | Organic bioelectronic sensors based on an electrolyte gated field-effect transistor are gaining momentum due to their extraordinary high-performance level that enables label-free selective single-molecule detection of both genomic and protein biomarkers with a millimeter-wide electrolyte-gated field-effect transistor (EGOFET) device. The organic semiconductor channel material used so far is a spin-coated regio-regular poly(3-hexylthiophene) (P3HT). Of paramount importance is to design an EGOFET sensor that is stable and cost-effective. To address the latter feature, an ink-jet printed regio-regular P3HT film is here investigated as the channel material. Moreover, the EGOFET device structure is intended to comprise a coplanar lateral gate electrode that enables mechanical and electrical stability. Overall, the structure is compatible with large area processing so it can be fabricated at low-costs and can be operated continuously for eight days. Additionally, systematic optical and Raman characterization of the P3HT film proves that the printing process results in a film with a low energetic disorder (better π–π stacking in the crystalline regions) that likely enables stable operation. However, the higher quality crystalline regions (as compared to a spin-coated film) are dispersed in a more significant fraction of the amorphous disordered material with a larger amount of trap states. The higher crystalline order is ascribed to the higher boiling point and slower evaporation of the ortho-dichlorobenzene solvent used in the printing process. Overall, the present study provides a systematic insight into the structure–property correlations, essential to design a well-functioning and cost-effective EGOFET for high-performance electronic biosensing. It also provides one of the few investigations comparing the features characterizing a spin-coated and an ink-jet printed P3HT film. |
Databáze: | OpenAIRE |
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