Improvement of Characteristics of Organic Thin-Film Transistor with Anodized Gate Insulator by an Electrolyte Solution and Low-Voltage Driving of Liquid Crystal by Organic Thin-Film Transistors

Fujisaki, Yoshihide; Inoue, Yutaka; Kurita, Taiichiro; Tokito, Shizuo; Fujikake, Hideo; Kikuchi, Hiroshi

doi:10.1143/jjap.43.372

Cited by 46 publications

(34 citation statements)

References 4 publications

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“…Because a printing process can be used for the production of this device, large sized displays can be anticipated. We will continue the development of an active-matrix driving technology using organic thin film transistors [13] that is suitable for flexible plastic substrates. …”

Section: Discussionmentioning

confidence: 99%

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Fujikake¹,

Sato²,

Murashige

2004

Displays

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Section: Discussionmentioning

confidence: 99%

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Fujikake¹,

Sato²,

Murashige

2004

Displays

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“…We intend to continue the development of an activematrix driving technology using organic thin film transistors 25) that are suitable for use with flexible plastic substrates.…”

Section: Discussionmentioning

confidence: 99%

Self-Restoration by Smectic Layer Structures of Monostable Ferroelectric Liquid Crystal in Flexible Devices

Fujikake

Sato

Isaka

et al. 2004

Jpn. J. Appl. Phys.

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In this paper, we discuss a self-restoration phenomenon affecting smectic layer deformation and molecular alignment in monostable ferroelectric liquid crystals used for flexible displays. First, the mechanical stability of tilted 'bookshelf' structures of smectic layers anchored on substrates using alignment layers was examined by precisely shearing two substrates. The microscopic texture of a monostable ferroelectric liquid crystal showed tolerance to shearing and the self-restoration was thought to be due to a smectic layer reconnection phenomenon, whereas a conventional bistable ferroelectric liquid crystal film generated alignment defects due to the tilting of the stable molecular direction. We then fabricated a flexible monostable device containing fine polymer fiber networks, where anchoring of molecularly aligned polymer fibers led to the observation of monostable liquid crystal switching. A uniform liquid crystal alignment was maintained in a 100 mm Â 100 mm device even after bending more than 10000 times at a minimum radius of curvature of 20 mm, due to the enhanced shearing tolerance of the smectic layer structure.

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“…These characteristics are much better than those of other low voltage flexible pentacene TFTs with Al 2 O 3 , Ti 2 O 5 , or hybrid dielectrics in the literatures. 3,5,7,15 It would be worth noting that the thickness of the dielectric is critical to the device performance. The pentacene TFTs with thin gate insulators Ͻ110 nm led to higher capacitances of the dielectric films.…”

Section: High Performance Flexible Pentacene Thin-film Transistors Famentioning

confidence: 99%

High performance flexible pentacene thin-film transistors fabricated on titanium silicon oxide gate dielectrics

Kitamura

Lee

et al. 2007

Applied Physics Letters

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Pentacene thin-film transistors (TFTs) with a high dielectric constant gate insulator, titanium silicon oxide (TiSiO2), were fabricated on flexible polyethylene naphthalate films coated with indium tin oxide layers. In order to define the device characteristics, the thickness dependence of the gate dielectric properties was studied. The pentacene TFT with a 132-nm-thick TiSiO2 film showed high performance with a threshold voltage of −0.88V, an inverse subthreshold slope of 317mV/decade. From the current-voltage characteristics, the field-effect mobility was obtained, resulting in an impressive mobility of 0.67cm2∕Vs at an operating voltage as low as −5V.

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Improvement of Characteristics of Organic Thin-Film Transistor with Anodized Gate Insulator by an Electrolyte Solution and Low-Voltage Driving of Liquid Crystal by Organic Thin-Film Transistors

Cited by 46 publications

References 4 publications

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Polymer-stabilized ferroelectric liquid crystal for flexible displays

Self-Restoration by Smectic Layer Structures of Monostable Ferroelectric Liquid Crystal in Flexible Devices

High performance flexible pentacene thin-film transistors fabricated on titanium silicon oxide gate dielectrics

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