Flexible Organic Light-Emitting Diode Displays Driven by Inkjet-Printed High-Mobility Organic Thin-Film Transistors

Mizukami, Makoto; Cho, Seung-Il; Watanabe, Kaori; Abiko, Miho; Suzuri, Yoshiyuki; Tokito, Shizuo; Kido, Junji

doi:10.1109/led.2017.2776296

Cited by 106 publications

(65 citation statements)

References 16 publications

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“…However, their application as the backplane for OLEDs is still at the early stages . One representative work was reported recently using inkjet‐printed dithieno[2,3‐d;2′,3′‐d′]benzo[1,2‐b;4,5‐b′]dithiophene (DTBDT‐C 6 ) and polystyrene (PS) blends, achieving the OTFT with a μ FE 1.2 cm 2 V −1 s −1 and a high I on / I off of 10 8 . The subsequent combination with OLED on a color filter realized a 3.2 in., 50 ppi flexible color AMOLED display.…”

Section: Solution‐processed Organic Tftsmentioning

confidence: 99%

“…The following work based on solution‐processed IGZO TFTs demonstrated a large‐size (320 mm × 352 mm) AMOLED display with a resolution of 85 ppi . Most recently, Mizukami et al reported a 3.2 in, 50 ppi flexible AMOLED display with inkjet‐printed organic TFTs . Spin coating is by far the most commonly used solution‐based fabrication method in laboratories, owing to its simplicity and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…However, the relatively low μ FE and the light‐sensitive property hinder their further application in AMOLEDs. Currently, low‐temperature polysilicon (LTPS) and oxide semiconductors constitute the pixel circuits in flexible OLED displays . LTPS TFTs deliver high μ FE values of over 50 cm 2 V −1 s −1 and stable electrical performance in OLED driving monitors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

159

130

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Studies on printable semiconductors and technologies have increased rapidly over recent decades, pioneering novel applications in many fields, such as energy, sensing, logic circuits, and information displays. The newest display technologies are already turning to metal oxide semiconductors, i.e., indium gallium zinc oxide, for the improvements needed to drive active matrix organic light-emitting diodes. Convenience and portability will be realized with flexible and wearable displays in the future. This report summarizes recent progress on the development of solution-processed thin film transistors, especially those deposited at low temperatures for next-generation flexible smart displays. The first part provides an overview on the history and current status of displays. Then, recent advances in state-of-the-art solution-processed transistors based on different semiconductors are presented, including metal oxides, organic materials, perovskites, and carbon nanotubes. Finally, conclusions are drawn and the remaining challenges and future perspectives are discussed. a large common cathode (opaque metal). This means that the light emission goes through the backplane and the TFT arrays are able to block the light, resulting in the reduced emission fill factor of the display. This mode is also called bottom emission. One effective way to avoid the light obstruction from TFTs in the backplane is to use top-emitting OLEDs, which have a transparent cathode. [2] In 2004, Pennsylvania State University demonstrated the first flexible phosphorescent AMOLED display with hydrogenated amorphous silicon on a 4 in. polyimide (PI) substrate. [7] One year later, a 48 × 48 organic pentacene TFT-driven AMOLED display on a polyethylene terephthalate (PET) substrate was reported by the same group. [8] In 2005, by employing a top-emission structure, researchers at Sony Corp. demonstrated the first full-color imaging on a flexible AMOLED with a pixel resolution of 80 ppi. [9] In 2013, Samsung Electronics showed curved OLED TVs for the first time. Two years later, the same company unveiled a smartphone with a curved edge display (Galaxy S6 Edge), which used touch sensors to improve the user interface and device design. Most recently, LG Display succeeded in developing the world's first large-size 77 in. transparent and flexible OLED display, which could be rolled up to a radius of 80 mm. [10] The ideal flexible AMOLED backplane should be robust, rollable/bendable, capable of complementary metal oxide semiconductor (CMOS) operation, and should lend itself to low-cost manufacturing. To advance toward next-generation flexible AMOLED displays, two key technological goals should be satisfied during fabrication. One is to develop TFT backplanes with good uniformity, stability, and electrical performance. Amorphous silicon (a-Si) TFTs are well known for their uniform electrical characteristics (µ FE < 1 cm 2 V −1 s −1 and I on /I off > 10 6 ) and have achieved great success in flat-panel LCD displays. However, the relatively low µ FE and the lig...

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Section: Solution‐processed Organic Tftsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

159

130

View full text Add to dashboard Cite

show abstract

“…) with an OTFT backplane using inkjet printing technology and solution processes [10][11]. OSCs were applied using the inkjet printing technique.…”

Section: Flexible Oled Displays With An Otft Backplanementioning

confidence: 99%

“…Among these technologies, organic light-emitting diodes (OLEDs), organic thin-film transistors (OTFTs), and organic photovoltaics (OPVs), which use organic materials, have been investigated for flexible devices [6][7][8], and their development is underway. In particular, interest in flexible OLED displays is increasing [9][10][11]. An institution of Yamagata University, Smart MIRAI House, was built to demonstrate the research results for living labs and the living environment of the near future, as shown in Figure 1 [12].…”

Section: Introductionmentioning

confidence: 99%

Design of Shift Register Using Organic Thin Film Transistor for Gate Driver of Flexible Organic Light-Emitting Diode Displays

Cho¹,

Mizukami²

2018

IJAST

Self Cite

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Benchmarking of Inkjet Printing Methods for Combined Throughput and Performance

Bevione

Chiolerio

2020

Adv Eng Mater

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Digital manufacturing of electrically conductive lines on flexible, soft polymers represents a key step for the 3D integration of electronic devices. Yet, the tradeoff between throughput and performance, once substrate and conducting materials are fixed, is an often-missing step in the literature. Herein, Ag conductive lines printed on a soft polymer are realized by means of piezoelectric inkjet printing, and three printing methods are compared to benchmark their output: drop on position, print on fly, and shingle method.

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Flexible Organic Light-Emitting Diode Displays Driven by Inkjet-Printed High-Mobility Organic Thin-Film Transistors

Cited by 106 publications

References 16 publications

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Design of Shift Register Using Organic Thin Film Transistor for Gate Driver of Flexible Organic Light-Emitting Diode Displays

Benchmarking of Inkjet Printing Methods for Combined Throughput and Performance

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