Molecular subtractive surface-energy engineering of crosslinked Poly(4-vinylphenol) insulators for a solution-processed organic thin-film transistor

Kwon, Jin-Hyuk; Lee, Jonghee; Kim, Min‐Hoi; Bae, Jin‐Hyuk; Park, Jaehoon

doi:10.1016/j.orgel.2021.106345

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…Interface engineering has been a vital approach in the quest to modulate and/or improve the characteristics of various organic electronic devices, including OTFTs, organic light-emitting diodes (OLEDs), and organic photovoltaics (OPVs). 26–35 Interface engineering in OTFTs often focuses on controlling and manipulating the electrical characteristics related to the switching function, while in OLEDs and OPVs, one of the key aspects of interface engineering is maximizing energy conversion for light emission and electricity generation, respectively. 36,37 OTFTs incorporate multiple heterogeneous materials for the constituent layers, each with designed roles, which accompanies the formation of multiple interfaces between them.…”

Section: Introductionmentioning

confidence: 99%

A review on diverse streams of interface engineering for organic thin-film transistors

Kwon,

Kim,

Bae

2024

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

A review on diverse streams of interface engineering for organic thin-film transistors

Kwon,

Kim,

Bae

2024

J. Mater. Chem. C

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“…Polymer thin film technology have been studied over the last decades because of their potential application in easily processable, low-cost, flexible and large area electronic devices that include thin film transistor, coatings, organic light emitting diodes, photovoltaic cells, sensors, switching devices, nanogenerators, memristors [1][2][3][4]. The dielectric layer is one of the most important items that determine the device performance due to the effect on the charge carrier conducting channel.…”

Section: Introductionmentioning

confidence: 99%

“…The electrical characteristics of the application are associated with the physicochemical interaction that takes place between the dielectric layer and the substrate of TFTs. One of the critical factors is surface energy, so the engineering of it can be the essential part to improve the electrical properties of electronic devices [2]. Usually, polymer thin films are responsible for different physical phenomena that change with type of solvent, film thickness, confinement and surface interaction effects [4].…”

Section: Introductionmentioning

confidence: 99%

“…Usually, polymer thin films are responsible for different physical phenomena that change with type of solvent, film thickness, confinement and surface interaction effects [4]. Dielectric polymers such as polyimide (PI) [5], polyethylene phenol (PEP) [5,6], polynorbornene [7], polyvinylpyrrolidone [2], poly(methyl methacrylate) (PMMA) [8] and poly(4-vinyl phenol) [9] has received an increasing interest as gate dielectric material due to: high dielectric constants, bio-degradability, flexibility, low cost and non-toxicity. In this paper we focused on two dielectric polymers used as dielectric gate in thin film transistors: PVA and PVP 360.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric Behaviour of PVP 360 and PVA for Thin Flexible Transistors Application

Herbei¹,

Bușilă²,

Alexandru³

et al. 2022

Mater. Plast.

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Despite important progress in the field of the thin flexible transistor (TFT)-based electronics, a major challenge still exist for organic TFTs to decrease the operating voltage, which is related to the properties of the dielectric and semiconductor layers from the OTFTs structure. In this paper, we present the electrical behavior of two biocompatible polymers, polyvinylpyrrolidone (PVP 360) and polyvinyl alcohol (PVA), regarding the application as insulating layer in thin-film transistors. The PVA and PVP 360 thin films were deposited onto epoxy resin copper double-sided layer and polyethylene tere-phthalate/Indium tin oxide (PET/ITO) substrates by sol-gel method, spin-coating technique. Two sol concentrations (1 and 5 wt. %) were prepared and the contact angle onto the used substrates was measured using a digital microscope camera. The obtained films have been characterized by scanning electron microscopy (SEM) and dielectrical behaviour. For electrical measurements, the metal-insulating-metal (MIM) structure was realized by cooper electrodes deposition at room temperature, onto the top of thin films, by magnetron sputtering method. The current (I) - applied voltage (from -5 to +5 V) curves were measured in air at room temperature (RT), using the Picoammeter homemade device. PVA and PVP 360 thin films showed low leakage currents with values within � 2 nA for �5 V range.

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Induction of Synaptic Plasticity in Flexible Organic Synaptic Transistors with Cross‐Linked Polymer Dielectric

Bhattacharjee,

Tiwari

2024

Adv Materials Technologies

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Controlled cross‐linking of polymer dielectric poly (4‐vinylphenol) (PVP) is demonstrated as an effective tool in enhancing the performance of flexible organic synaptic transistors (OSTs). Investigation of variation of concentration of the cross‐linking agent methylated poly (melamine‐co‐formaldehyde) (PMCF) in PVP in bilayer combination with high‐k hafnium oxide (HfO2) as gate dielectric in devices shows that the lower concentration of cross‐linking agent results in better memory performance. OSTs with 26% PMCF concentration in PVP (by mass) exhibit excellent memory performance with memory window > 4 V for VGS sweep of ±5 V, static retention of ≈104 s, dynamic retention for 500 cycles, and ≈125 continuous program/erase cycles. Pulse paired facilitation with relaxation time constants of 370 and 4670 ms respectively for slow and rapid phases with regulating modulation amplitude of ≈1 resemble a biological synapse. Through excitatory post synaptic current characteristics, spike timing dependant plasticity and spike voltage dependant plasticity are clearly observed, with low energy consumption per spike on the order of 10 pJ. Further, by leveraging the intricate interconnected data transfer and computation phenomenon, “AND” logic is effectively implemented using these OSTs. These exciting results may open up new directions toward the development of hardware for neuromorphic computing.

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Molecular subtractive surface-energy engineering of crosslinked Poly(4-vinylphenol) insulators for a solution-processed organic thin-film transistor

Cited by 7 publications

References 33 publications

A review on diverse streams of interface engineering for organic thin-film transistors

A review on diverse streams of interface engineering for organic thin-film transistors

Dielectric Behaviour of PVP 360 and PVA for Thin Flexible Transistors Application

Induction of Synaptic Plasticity in Flexible Organic Synaptic Transistors with Cross‐Linked Polymer Dielectric

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