• 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
Keynote speech related to Prof.Tokito at Japan MID Association(Institute of Industrial Science, The University of Tokyo, November 1,2019) titled "Creation and expectation of 3D printed electronics technology" was introduced in "Information site for surface modification to improve mst mechanical properties".

Funding
Research subject related to Assistant Professor Sekine (Research Representative) titled " Development of soft multi-sensor and application of digital skin for robotics automation" was adopted for Research Grant 2019 by The Mikiya Science and technology foundation. Congratulations!

Result
A paper related to Assistant Professor Takeda titled "Fabrication Process and Performance Evaluation of Organic Integrated Circuits Using Printing Techniques." was published in IEICE(The Institute of Electronics,Information and Communication Engineers).

Result
A paper related to Shota Yoshida(M2) titled "High Resolution Electrodes Patterning Using Surface Wettability Control and its Application to Organic Thin-film Transistors" was published in Journal of the Imaging Society of Japan.

Result
A Paper on the results of joint research between our laboratory and Surrey University, UK titled "Towards fully printed memristive elements: a-TiO2 electronic synapse from functionalized nanoparticle ink" was published in ACS Applied Electronic Materials.

Result
A paper related to Associate Professor Nagamine titled "Printed organic transistor-based biosensors for non-invasive sweat analysis" was published in Analytical Science(2020).

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 published in IEEE Electron Device Letters.

Result
A paper related to Assistant Professor Takeda titled "Development and Performance Evaluation of Organic Integrated Circuit Fabrication Process Using Printing Method" was published in IEICE Transactions.

Result
A Paper related to Assistant Professor Takeda titled "High-speed Complementary Integrated Circuit with a Stacked Structure using Fine Electrodes Formed by Reverse Offset Printing" has been accepted to ACS Applied Electronic Materials.

Result
A Paper related to Assistant Professor Takeda titled "Printed Organic Complementary Integrated Circuits Using SAM Processing Free Polymer p-type Semiconductor" was published in Journal of the Imaging Society of Japan.

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

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

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

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

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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