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Self-aligned surface treatment for thin-film organic transistors

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TLDR
In this article, an ultrathin solution-processed polymer layer is applied as surface treatment for organic thin-film transistors, which is compatible with the use of the bottom contact configuration, despite the fact that the polymeric surface treatment does not stand a photolithographic step.
Abstract
For organic thin-film transistors where source-drain contacts are defined on the gate dielectric prior to the deposition of the semiconductor (“bottom-contact” configuration), the gate dielectric is often treated with a self-assembled molecular monolayer prior to deposition of the organic semiconductor. In this letter, we describe a method to apply an ultrathin solution-processed polymer layer as surface treatment. Our method is compatible with the use of the bottom-contact configuration, despite the fact that the polymeric surface treatment does not stand a photolithographic step. Furthermore, we show that our surface treatment results in superior transistor performance.

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Citations
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Journal ArticleDOI

Thin-Film Morphology of Inkjet-Printed Single-Droplet Organic Transistors Using Polarized Raman Spectroscopy: Effect of Blending TIPS-Pentacene with Insulating Polymer

TL;DR: Thin-film morphology studies of inkjet-printed single-droplet organic thin-film transistors (OTFTs) are reported using angle-dependent polarized Raman spectroscopy to determine the degree of molecular order and to spatially resolve the orientation of the conjugated backbones of the 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-Pentacene) molecules.
Journal ArticleDOI

Correlation between bias stress instability and phototransistor operation of pentacene thin-film transistors

TL;DR: In this article, the use of pentacene thin-film transistors as phototransistors is studied and the shift in turn-on voltage responsible for the high photosensitivity of these devices is shown to be strongly dependent on illumination time and applied gate voltage.
Journal ArticleDOI

On the Origin of Contact Resistances of Organic Thin Film Transistors

TL;DR: A model is presented that describes the gate-voltage-dependent contact resistance and channel-length-dependent charge carrier mobility of small-molecule-based organic thin-film transistors in top and bottom drain/source contact configuration.
Journal ArticleDOI

High-Performance Flexible Bottom-Gate Organic Field-Effect Transistors with Gravure Printed Thin Organic Dielectric

TL;DR: OFETs with a bottom-gate (BG) bottom-contact (BC) geometry have an advantage in that the organic semiconducting layer is deposited last, allowing easy fabrication and patterning of micron-scale OFET channels, electrodes and interconnects by conventional photolithographic methods.
Journal ArticleDOI

Influence of Thiol Self‐Assembled Monolayer Processing on Bottom‐Contact Thin‐Film Transistors Based on n‐Type Organic Semiconductors

TL;DR: In this article, the influence of thiol metal contact treatment on the molecular-level structures of such interfaces was investigated using hexamethyldisilazane (HMDS)-treated SiO2 gate dielectrics.
References
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Journal ArticleDOI

General observation of n-type field-effect behaviour in organic semiconductors

TL;DR: It is demonstrated that the use of an appropriate hydroxyl-free gate dielectric—such as a divinyltetramethylsiloxane-bis(benzocyclobutene) derivative (BCB; ref. 6)—can yield n-channel FET conduction in most conjugated polymers, revealing that electrons are considerably more mobile in these materials than previously thought.
Journal ArticleDOI

Flexible active-matrix displays and shift registers based on solution-processed organic transistors.

TL;DR: Flexible active-matrix monochrome electrophoretic displays based on solution-processed organic transistors on 25-μm-thick polyimide substrates based on 1,888 transistors are demonstrated, which are the largest organic integrated circuits reported to date.
Journal ArticleDOI

Recent Progress in Organic Electronics: Materials, Devices, and Processes

TL;DR: Research in organic electronics has included advances in materials, devices, and processes as mentioned in this paper, which are enabling the incorporation of organic electronic components in products including OLED displays and flexible electronic paper.
Journal ArticleDOI

Pentacene-based radio-frequency identification circuitry

TL;DR: In this paper, a Pentacene-based thin-film integrated circuit with polymeric shadow masks and powered by near-field coupling at radio frequencies of 125 kHz and above 6 MHz has been demonstrated.
Journal ArticleDOI

Pentacene-based organic thin-film transistors

TL;DR: In this paper, the authors show that the large sub-threshold slope typically observed is not an intrinsic property of the organic semiconducting material and that devices with sub-reshold slope similar to amorphous silicon devices are possible.
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Furthermore, we show that our surface treatment results in superior transistor performance.