• 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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Result
Paper related to Assistant Professor Wang titled "Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring" was published on Scientific Reports.

Invited Lecture
Professor Tokito gave a keynote speech titled "Flexible Printed Biosensors for Healthcare and Medical Applications" at The 2nd Annual Conference on Chemical Sensors for Wearable Devices (Technion-Israel Institute of Technology Haifa, Israel) on February 6 2020.

Invited Lecture
Professor Tokito will give an invited lecture at The 67th JSAP Spring Meeting (Yotsuya Campus, Sophia University) on March 14.

Invited Lecture
Professor Tokito will give an invited lecture at JSPS 142 committee (Tokyo University of Science,Tokyo) on March 6.

News
Professor Tokito will give an invited lecture at NIKKEI BP Substrateless Seminar", in Tokyo on March 22.

Award
Our laboratory, Printed device research department, won the Grand Prix in JFlex awards2020.

Press
The article related to Tokito Lab was posted to Yonezawa Shimbun on January 27.

Press
The article related to Tokito Lab was posted to Yomiuri Shimbun on January 25.

Result
A paper related to Project Researcher Subhash Singh titled "Flexible PMOS Inverter and NOR Gate Using Inkjet-Printed Dual-Gate Organic Thin Film Transistors." was accepted by IEEE Electron Device Letters.

Press
An article related to professor Shizuo Tokito titled "Yamagata University developed sensor-mounted electronic slip to promote logistics revolution" was posted to Mainichi Shimbun.

Events
Our Laboratory exhibited at the "Converting Technology Exhibition -JFlex 2020" on January 29-31. (Tokyo Big Sight, West Hall 3&4, Booth No.4W-K34)

Press
An article related to assistant professor Tomohito Sekine titled "An extendable sensor, Yamagata University (Faculty of Engineering) -Research toward future-" was posted to Yonezawa Shimbun.

Articles
A Review related to Associate Prof.Nagamine titled "Flexible and printed biosensors based on organic TFT devices" was published on Chemical, Gas, and Biosensors for Internet of Things and Related Applications, 2019.Chapter 19, pp.291-306.

Result
A paper related to Associate Prof.Nagamine titled "Printed organic transistor-based biosensors for non-invasive sweat analysis" was published on Analytical Science.

Result
A paper written by Yuki Maruyama,a 1st-year doctoral student, titled "Electrochemical characterization of TEMPO radical in ionic liquids" was accepted by Electrochemistry.

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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