• 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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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.

Result
A paper related to Yusuke Ichimura, who graduated from our laboratory ,titled "A fully screen-printed potentiometric chloride ion sensor employing a hydrogel-based touchpad for simple and non-invasive daily electrolyte analysis" was published in Analytical and Bioanalytical Chemistry .

Invited Lecture
Clay Shepherd , the visiting professor of our laboratory ,will give an invited speech at Virtual FLEX Conference & Exhibition 2021( Virtual via the Zoom platform combined with the networking platform Swap Card ) on February 24.

Result
A joint research paper related to the visiting professor Isao Shitanda of Tokyo University of Science and our laboratory titled "Paper-based Lactate Biofuel Cell Array with High Power Output" was published in Journal of Power Sources.

Result
A paper related to Sukuru Minamiki (who is in National Institute of Advanced Industrial ScienceTechnology and graduated from our laboratory )and Professor Tokito titled "Flexible organic thin-film transistor immunosensor printed on a one-micron-thick film” was published in Communications Materials .

Result
A paper related to Yuki Maruyama(D2) titled " A heat-melt adhesive-assisted transferable electrode films " was published in Journal of scientific reports.

News
The research result of the seat sensor was posted in the web media "EMIRA".

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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