Functionalized polymer dielectrics for low-operating voltage organic field-effect transistors

Barron, John; Lee, Jaewon; Guha, S.

doi:10.1557/s43578-022-00576-4

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…The OTFT exhibit larger on-state I DS , with the V GS and V DS increasing to −10 V. After 1000 repeated tensile and compressive bending cycles, the µ sat slightly decreases to 0.39 cm 2 Vs −1 , from the pristine 0.41 cm 2 Vs −1 , and the V T slightly negatively shifts no more than 0.5 V. The results indicate that the present flexible OTFT has an excellent mechanical bending durability. In comparison, our flexible OTFT with an optimal composite gate dielectric exhibits a higher mobility and better mechanical bending property, than those of the recently reported lowvoltage operating OTFTs [13,14,[30][31][32][33][34][35][36][37], as summarized in table 1.…”

Section: Resultsmentioning

confidence: 77%

Low-voltage operating, high mobility top-gate structural flexible organic thin-film transistor with a one-step spin-coated binary polymer gate dielectric

Su,

Yan,

Lin

et al. 2024

Semicond. Sci. Technol.

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Low-voltage operation is one of the prerequisites for the practical applications of the organic thin-film transistors (OTFTs). Up to date, the most reported low-voltage operatable OTFTs use a bottom-gate structure, and are fabricated by several different technologies in the whole process, in which the organic semiconductors and/or gate dielectrics are prepared in the expensive vacuum equipment. The simple fabricating technologies and fewer processes can better demonstrate the inherent advantages, and enhance the commercial competitiveness of OTFTs. Here, we propose a strategy to fabricate the binary polymers gate dielectric by one-step spin-coating in the top-gate structured flexible OTFTs, by which not only the device performances are prominently improved, but also the fabricating process of the OTFTs is minimized. As a result, the flexible OTFTs exhibit a high mobility over 0.5 cm2/Vs, low threshold voltage near to -0.5 V, and excellent mechanical bending durability with a very slightly performances degradation after the tensile and compressive bending at a small curvature radius of 3.0 mm over 1000 cycles.

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Section: Resultsmentioning

confidence: 77%

Low-voltage operating, high mobility top-gate structural flexible organic thin-film transistor with a one-step spin-coated binary polymer gate dielectric

Su,

Yan,

Lin

et al. 2024

Semicond. Sci. Technol.

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show abstract

“…Ionically conductive polymer gels have a wide range of potential applications from organic field effect transistors [1,2], to strain-sensors [3][4][5][6][7], wearable electrodes [8,9] and biosensor encapsulations [10,11]. They consist of an interlinked polymer network that has been swollen with a solvent, typically water.…”

Section: Introductionmentioning

confidence: 99%

Photoinitiated chemical vapor deposition (piCVD) of composition tunable, ionically conductive hydrogels on diverse substrates

Patamia,

Andrew

2023

Flex. Print. Electron.

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Ionically conductive hydrogels are finding prominence in a wide range of emerging devices and applications, including biopotential sensors, organic field effect transistors, biomedicine, and soft robotics. Traditionally, these gels are synthesized through solution-phase polymerization or solvent based swelling of a polymer network and then cast in place or adhered to an intended substrate after synthesis. These fabrication approaches place artificial limitations on the accessible chemical composition and ionic conductivity of the gels, and limit deployment of ionically conductive hydrogels in complex platforms. Here we present a modular method to create ionically conductive hydrogels on a variety of rigid, flexible, or filamentary substrates through a photoinitiated chemical vapor deposition (piCVD) process. First, a viscosity tunable precursor mixture of desired ionic composition and strength is created and coated onto a target substrate. Next, an acrylate film is grown directly on these coated substrates via piCVD. Since both the monomer and photoinitiator used during the piCVD process are miscible in the aqueous precursor mixture, polymerization occurs at both the surface of and within the precursor layer. Using this two-step strategy, we isolate a robust composite hydrogel with independently tunable ionic properties and physical structure. This method is compatible with most substrates and results in a conformal, persistent gel coating with excellent rehydration properties. Gels containing a variety of biocompatible salts can be accessed, without concomitant changes in physical structure and morphology. Ionic conductivities can be tuned between 1 × 10−5–0.03 S cm−1 by changing the ionic strength of the precursor mixture. Additionally, we show that the material retains its ion concentration and conductivity after washing. Finally, we deploy this material onto several different substrates and show that through this method the same gel can be manufactured in-place regardless of the intended substrate.

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Functionalized polymer dielectrics for low-operating voltage organic field-effect transistors

Cited by 2 publications

References 40 publications

Low-voltage operating, high mobility top-gate structural flexible organic thin-film transistor with a one-step spin-coated binary polymer gate dielectric

Low-voltage operating, high mobility top-gate structural flexible organic thin-film transistor with a one-step spin-coated binary polymer gate dielectric

Photoinitiated chemical vapor deposition (piCVD) of composition tunable, ionically conductive hydrogels on diverse substrates

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