• Laboratory Research Domains

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  • Organic Semiconductor Materials, Devices & Circuits

    Developing new p-type and n-type organic semiconductor materials in collaboration with industry companies, fabricating and characterizing OTFT devices and circuits using synthesized inks and printing methods such as the inkjet method.
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  • Flexible and Stretchable Printed Physical Sensors

    Developing physical sensors that are printable, flexible, and highly sensitive. Objective is to realize sensors suitable for robots and healthcare by manufacturing flexible sensors and stretchable sensors that detect stress generated by pressure, bending, and tension.
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  • Flexible Hybrid Electronics

    Prototyping hybrid (FHE) sensors that are wearable and combine the flexibility of organic electronics with the high performance and functionality of Si-LSI while wirelessly transmitting sensor data.
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  • Ultra-Fine Printing Technologies

    Developing conductive inks suitable for use with reverse-offset printing, evaluating the functionality of OTFT electrodes and interconnects through printing experiments, and developing integrated circuit manufacturing processes.
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  • Development of the Metal Nanoparticle Ink

    Developing low-temperature sintered metal nanoparticle inks to improve the performance of printed TFT devices, with advanced particle designs and ink technology to reduce interconnect layer widths and the energy barrier with the semiconductor layer.
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  • Large-Area Sensor Technologies

    Developing large-area sensors that can continuously and unobtrusively measure vital signals such as heartbeat and respiration, and body movements. Thin, flexible sensors easily installable in beds, and employable in elderly care facilities or home care settings.
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  • Robotic Sensing Technologies

    Mounting flexible sensors on the robotic gripper hand, building a system linked with IoT networks to significantly improve safety and work efficiency, and create new application fields. By adding a tactile function to the grip, its gripping force can be controlled.
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Result
Research paper Project researcher Subhash Singh's paper "Flexible high-performance organic thin-film transistors and epitaxial inverters: Trap controlled grain boundaries and contact resistance effect in different channel length devices" has been published in the journal Synthetic Metals.

Result
Project researcher Subhash Singh's paper "Flexible Low-Voltage Organic Thin Film Transistors and iSeries Inverters: Effect of Channel Width on Noise Margin" was published in the Journal of Physics D: Applied Physics.

Result
The paper "Flexible and Printed Organic Nonvolatile Memory Transistor with Bilayer Polymer Dielectrics", based on joint research between our laboratory and POSTECH in Korea, was published in Advanced Materials Technologies.

Invited Lecture
Lecture presentation by Professor Tokito at CEA (French Alternative Energies and Atomic Energy Commission) internal laboratory webinar (held online) on Friday, July 2nd, 2021, entitled, "Flexible and Printed Organic Sensors and IoT Applications."

Invited Lecture
Professor Tokito will give an invited presentation on "Flexible and Printed Organic Sensors and IoT Applications" at the International 3D, 4D Printing Online Seminar (Zoom platform), sponsored by KFPE (Korea Flexible & Printed Electronics Society) on Thursday, June 3rd, 2021.

News
On Saturday, June 5th, Professor Tokito will give a special lecture, "Health management and medical application of flexible organic sensors," at the 29th Annual Meeting of the Tohoku Regional Association of the Japanese Society of Physical Fitness and Medicine (Yonezawa Prefectural University of Nutrition, Yamagata).

Presentation
The result of the joint research between our laboratory and Tokyo University of Science was distributed on Youtube on April 12, entitled "Development of a thin-film wearable biofuel cell array that produces high output from lactic acid in sweat".

Press
The achievement of the joint research between our laboratory and Tokyo University of Science was published in the radio newspaper on March 15th, titled as "Wearable battery array that generates electricity with sweat developed by research groups such as Tokyo University of Science, using Japanese paper for the substrate material"

Result
Congratulations!Assistant Professor Wang's paper "Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring" is one of the Top 100 Materials Science Papers Downloaded in 2020 by Scientific Reports.

Result
A paper related to Assistant Professor Sekine about the tactile soft sensor for slip sensing was published in Small Science as an Inside Front Cover.

News
Congratulations! Tokito Lab student B4 Yuki Motomura received the Yamagata University Hata Itsuzo Award . B4 Keisuke Ito received the Yamagata University Excellent Student Award. B4 Chiba Shunya received the Yamagata University Excellent Student Award.

News
Congratulations on graduation! At Tokito Lab, 1 doctoral student, 4 master's students, and 6 undergraduate students were awarded degrees.

News
We are collaborating with KDDI R & D Laboratories to develop applications for chairs (smart chairs) equipped with seat-type sensors developed by our laboratory. The application image is published at the following URL.

Result
A paper related to Kai Sasaki  (D3) titled "onstructive Optimization of a Multienzymatic Film Based on a Cascade Reaction for Electrochemical Biosensors "was published in ACS Omega .

Invited Lecture
A lecture was held online by Project Professor Shiba at "Next Generation Sensor Comprehensive Symposium: Thinking about Sensor Technology in the New Normal Era" from 15:15 to 16:00 on 18 February.

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【Tokito, Office】
4-3-16 Jonan, Yonezawa, Yamagata
992-8510, JAPAN
YAMAGATA UNIVERSITY
Research Center for Organic Electronics (Bldg. 10)
Phone:+81-238-26-3725
Fax:+81-238-26-3788

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