| Download | - View final version: Towards sustainable, direct printed, organic transistors with biocompatible copolymer gate dielectrics (PDF, 3.0 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1002/cjce.25298 |
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| Author | Search for: Massey, Roslyn; Search for: Song, Xiaoyu; Search for: Ashoori, Shiva; Search for: Guan, Jingwen1ORCID identifier: https://orcid.org/0000-0003-1759-2172; Search for: Prakash, RaviORCID identifier: https://orcid.org/0000-0001-7934-425X |
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| Affiliation | - National Research Council of Canada. Quantum and Nanotechnologies
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| Funder | Search for: Natural Sciences and Engineering Research Council of Canada; Search for: National Research Council Canada |
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| Format | Text, Article |
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| Subject | biocompatible dielectrics; direct printed electronics; organic thin film transistors |
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| Abstract | We have investigated the potential of three dielectric materials to meet the future demands of green dielectrics: Polycaprolactone (PCL) thermoplastic, polyvinyl alcohol (PVA)-carrageenan (CAR) crosslinked biopolymer, and boron nitride nanotubes (BNNTs) as a nano additive in PVA. Metal–insulator–metal (MIM) capacitors and organic thin film transistors (OTFT) were built with bilayer dielectric stacks of PVA-CAR, PVA-PCL, and PVA-BNNT materials to examine their electrical properties. The PVA-CAR layer uses a cyclic freeze thaw process to crosslink PVA and CAR for superior mechanical and electrical properties to either material alone. The PVA-CAR MIM capacitors showed a dielectric constant of 23, which was found to be consistent with the extracted OTFT gate dielectric characteristics. Of the OTFT devices tested, PVA-CAR OTFT showed highest device currents at low applied biases and produced an ON/OFF ratio of 10⁴–10⁵, both values were highest amongst the tested gate dielectrics. This material is therefore extremely promising for green electronics. The PVA-PCL OTFT had very low leakage current and beneficial hydrophilic properties with comparable electrical properties to the commonly used organic material polytetrafluoroethylene. PVA-BNNT MIM capacitors showed a low dielectric constant of 0.7, and the high resistivity makes this a promising material for shielding or substrates in high frequency applications. All three materials have the potential to fulfil different niches in a sustainable electronics future. |
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| Publication date | 2024-05-05 |
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| Publisher | Wiley |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 22bcea04-a2d4-44b1-84df-bf3f0fd9320f |
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| Record created | 2024-10-07 |
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| Record modified | 2025-11-05 |
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