Organosilicon dimer of BTBT as a perspective semiconductor material for toxic gas detection with monolayer organic field-effect transistors
| Autor: | Maxim A. Shcherbina, Artem V. Bakirov, Askold A. Trul, Victoria P. Chekusova, Alexey S. Sizov, Elena V. Agina, Sergey N. Chvalun, Oleg V. Borshchev, Sergey A. Ponomarenko |
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| Rok vydání: | 2018 |
| Předmět: |
Electron mobility
Organic field-effect transistor Materials science business.industry Benzothiophene 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Threshold voltage chemistry.chemical_compound chemistry Monolayer Materials Chemistry Optoelectronics Field-effect transistor Thin film 0210 nano-technology business Organosilicon |
| Zdroj: | Journal of Materials Chemistry C. 6:9649-9659 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c8tc02447b |
| Popis: | Monolayer organic field effect transistors (OFETs) provide opportunity for ultrahigh sensitivity gas sensor applications due to a strong dependence of OFET key parameters on the environment. However, an impressive combination of both high sensitivity and instantaneous response of such gas sensors can be achieved only on low-defect dense monolayers with high electrical performance. Herein, we investigated monolayer thin film formation of recently developed benzothieno[3,2-b][1]benzothiophene (BTBT) organosilicon dimer D2-Und-BTBT-Hex by Langmuir–Blodgett, Langmuir–Schaefer and spin-coating methods. For all these techniques, the conditions of uniform low-defect monolayer formation were found. These monolayers were used for preparation of OFET devices, which demonstrated excellent electrical performance with a hole mobility up to 7 × 10−2 cm2 V−1 s−1, a threshold voltage around 0 V and an on–off ratio of 105 as well as long-term stability of half-year storage under ambient conditions. Preliminary investigations demonstrated that the monolayer OFETs give an instantaneous response to ammonia at low concentrations (down to 400 ppb). These findings show a great potential of BTBT-based OFETs for large-area sensing device application. |
| Databáze: | OpenAIRE |
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