• Organic Semiconductor Materials

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  • Flexible Devices with Printed Organic and Nanoparticle Materials

    We have developed flexible electronic devices on ultrathin (< 3 µm) plastic films by employing advanced printing technologies together with organic semiconductors, ferroelectric polymers, and metal nanoparticle inks. Our objective is to realize patch-type healthcare devices using the ultra-flexible sensor devices.
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  • Development of the OFET-Based Biosensors

    We have developed printed OFET-based biosensors that are fully flexible, and are currently striving to apply these sensors in the non-invasive detection healthcare biomarkers in externally secreted bodily fluids including sweat and saliva.
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  • Flexible and Stretchable Printed Physical Sensors

    We are developing flexible or stretchable physical sensors that employ ferroelectric polymers and stretchable paste inks applied using conventional printing methods. Our aim to utilize these devices in robot skins, healthcare, tactile sensors and other novel applications.
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  • Flexible Hybrid Electronics

    Organic thermal sensors and stacked interconnects are printed on plastic film substrates using conventional screen printing, and to which thin, small Si-LSI chips are mounted. This hybrid sensor combines the flexibility of organic electronics with the highly functional of silicon electronics. Using these devices, we have succeeded in measuring skin temperature and monitoring the temperature of commercial products, while wirelessly transmitting the data.
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  • Reverse Offset Printing

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  • 3D-Printed Electronics

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  • Development of the Metal Nanoparticle Ink

    We are developing metal nanoparticle ink that can be sintered at low-temperature to create high-performance printed TFT devices. We achieved a reduction of the energy barrier between semiconductor and electrodes by improving the nanoparticle design and ink formulation technology.
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  • Development of the Large Area Printing Processes

    We have developed the roll-to-roll inkjet printing process technology that can be applied to the fabrication of large-area, high-definition electronic circuits. With this technology, TFT arrays and sensor devices can be continuously fabricated directly on the wide-format film rolls.
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News
Congratulations! Professor Tokito was appointed to the 25th associate member of Science Council of Japan.

News
We will exhibit the latest research achievement at the exhibition JFlex 2021(Tokyo Big sight) during December 9 ~ 11.

Invited Lecture
The research activities of our lab. related to the printed device technology was introduced in the TV show "Galileo X" on October 11.

Invited Lecture
Professor Tokito gave an invited talk titled "Printed Organic Electronics contribute to the realization of a safe and secure society in future." at the 10th CSJ Chemistry Festa 2020(Online) on October 22.

Funding
A research subject related to Associate Professor Nagamine(Research Representative) titled "Smart Digital Health Sensing Research Center " was adopted by YU-COE fiscal 2020, a research support program of Yamagata University.

News
A result of joint research between ARKEMA(FRANCE) and our Lab. was published in Arkema's new magazine “Innovative With”.

Articles
An article related to Professor Tokito titled "3D Printed Electronics" was published in the Journal of The Japan Institute of Electronics Packaging.

Result
A paper related to Assistant Professor Sekine titled "Improvement of Chemical Stability in Electrochemical Migration Resistance in Printed Silver Electrodes" was published in the Journal of The Japan Institute of Electronics Packaging.

Others
An article related to our laboratory's project titled "Yamagata University developed an electronic slip with sensor utilized printing technology." was published in an E-mail Newsletter of Sangyo Times Inc.

Invited Lecture
Associate Professor Matsui gave an invited speech "Flexible and Printed Organic Transistors and Their Application to Electrochemical Health Monitors." at ECS Student Chapter Yamagata and Montreal joint Virtual Symposium on July 31st at 9:00 AM JST or July 30th at 8:30 PM EDT.

Result
A Paper on the results of joint research between our laboratory and POSTECH, Korea titled "A Flexible 3D Organic Preamplifier for a Lactate Sensor" was published in Macromolecular Bioscience.

Result
A paper related to Assistant Professor Yi-Fei Wang titled "Printed Strain Sensor with High Sensitivity and Wide Working Range Using a Novel Brittle-Stretchable Conductive Network" was published in Acs Applied Materials & Interfaces.

Result
A paper related to Project Researcher Subhash Singh titled "Flexible inkjet-printed dual-gate organic thin film transistors and PMOS inverters: Noise margin control by top gate" was published in Organic Electronics.

Result
A paper related to Assistant Professor Sekine titled "Polymer sensor mounting on soft robot's hand" was published in The Society of Polymer Science Japan.

News
N-type organic semiconductors with high electron mobility TU-1 and TU-3 developed by our laboratory were commenced sales by Sigma-Aldrich Japan inc. and Tokyo Chemical Industry Co., Ltd.

More NEWS    More RESEARCH RESULTS

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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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