Flexible electrophoretic display driven by solution-processed organic TFT with highly stable bending feature

Park, Chang Bum; Kim, Kyung Min; Lee, Jung Eun; Na, HyungIl; Yoo, Soon Sung; Yang, Myoung Su

doi:10.1016/j.orgel.2014.09.039

Cited by 34 publications

(17 citation statements)

References 26 publications

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“…Switching of electronic ink displays, either conventional or TIR-based, is based on the field-induced motion of charged colloidal particles in a nonpolar liquid. Many physical mechanisms involved in the switching of electronic ink displays have been investigated over the last decade [6,7]. The electronic inks usually contain FIG.…”

Section: Introductionmentioning

confidence: 99%

Electrodynamics of Electronic Paper Based on Total Internal Reflection

et al. 2018

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We present a study of the fundamental electrodynamics of an electronic ink pixel based on frustrated total internal reflection, which is relevant for the ongoing development of video-speed-capable electronic ink displays. Devices are fabricated with plane-parallel electrodes covered with a dielectric coating of the poly(p-xylylene) polymer Parylene C and filled with ink proprietary fluorochemical fluid containing absorbing particles. Reflectivity measurements of frustrated total internal reflection and transient current measurements provide information on the concentration of particles near the electrodes, conductivity of the ink, and screening of the electric field. By comparing the measurements with an electro-optical model, it is found that the electrical properties of the ink are dominated by positively charged particles and negative countercharges. Screening of the electric field depends as expected on the dielectric coating thickness. The observation of an asymmetry in the steady-state gray level response to an applied voltage is explained by fixed positive charges adsorbed at the interface between the dielectric coating and the dispersion. The overall switching dynamics of the device for different voltage sequences is in good agreement with simulations.

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Section: Introductionmentioning

confidence: 99%

Electrodynamics of Electronic Paper Based on Total Internal Reflection

et al. 2018

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“…Organic thin-film transistors (OTFTs) have attracted great attention for a wide range of applications, such as flexible displays 1 2 , sensors 3 , radio frequency identification tags 4 , low-cost memories 5 , and microprocessors 6 , due to their unique properties of excellent mechanical flexibility and process advantages of being compatible with high throughput and low-budget printing processes 7 . Over the years, significant efforts have been made to develop high carrier mobility, chemically and physically stable organic semiconductor materials with the reported device performance of OTFTs already better than that of amorphous silicon devices 8 9 10 11 .…”

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confidence: 99%

Flexible All-organic, All-solution Processed Thin Film Transistor Array with Ultrashort Channel

Liu

et al. 2016

Sci Rep

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Shrinking the device dimension has long been the pursuit of the semiconductor industry to increase the device density and operation speed. In the application of thin film transistors (TFTs), all-organic TFT arrays made by all-solution process are desired for low cost and flexible electronics. One of the greatest challenges is how to achieve ultrashort channel through a cost-effective method. In our study, ultrashort-channel devices are demonstrated by direct inkjet printing conducting polymer as source/drain and gate electrodes without any complicated substrate’s pre-patterning process. By modifying the substrate’s wettability, the conducting polymer’s contact line is pinned during drying process which makes the channel length well-controlled. An organic TFT array of 200 devices with 2 μm channel length is fabricated on flexible substrate through all-solution process. The simple and scalable process to fabricate high resolution organic transistor array offers a low cost approach in the development of flexible and wearable electronics.

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“…Although such wearable devices are expected to have an effect on future daily lifestyles, they must first become more lightweight and flexible. Methods for printing flexible electronics [1][2][3][4][5][6][7][8][9][10][11] on plastic films are being developed all over the world. In conventional printing methods, special inks including organic semiconductors and solvents are used.…”

Section: Introductionmentioning

confidence: 99%

Solvent-Free Toner Printing of Organic Semiconductor Layer in Flexible Thin-Film Transistors

et al. 2017

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A solvent-free printing process for printed electronics was successfully developed using toner-type patterning of organic semiconductor toner particles and subsequent thin-film formation. These processes use the same principle as that used for laser printing. The organic thin-film transistors were prepared by electrically distributing the charged toner onto a Au electrode on a substrate film followed by thermal lamination. The thermal lamination was effective for obtaining an oriented and crystalline thin film. Toner printing is environmentally friendly compared with other printing technologies because it is solvent free, saves materials, and enables easy recycling. In addition, this technology simultaneously enables both wide-area and high-resolution printing.

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Flexible electrophoretic display driven by solution-processed organic TFT with highly stable bending feature

Cited by 34 publications

References 26 publications

Electrodynamics of Electronic Paper Based on Total Internal Reflection

Electrodynamics of Electronic Paper Based on Total Internal Reflection

Flexible All-organic, All-solution Processed Thin Film Transistor Array with Ultrashort Channel

Solvent-Free Toner Printing of Organic Semiconductor Layer in Flexible Thin-Film Transistors

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