Presenter：Tomoyuki Yokota (The University of Tokyo)
Topic：Ultra-flexible organic electronics for health monitoring
Time：10:00 AM, October 14th
Location：909-B
Abstract:：
We have developed ultra-flexible and lightweight organic electronics and photonics devices with few micron substrates. We fabricated the 2-V operational organic transistor and circuits which have very thin gate dielectric layers. The gate dielectrics were composed of thin aluminum oxide layer and self-assembled monolayers (SAMs). Due to the very thin substrate and neutral position, our device shows highly flexibility and conformability. The device doesn’t be broken after crumpling.
Furthermore, we fabricated highly efficient, ultra-flexible, air-stable, three-color, polymer light-emitting diodes (PLEDs) have been manufactured on one-micrometer-thick parylene substrates. The total thickness of the devices, including the substrate and encapsulation layer, is only three micrometers, which is one order of magnitude thinner than the epidermal layer of the human skin. The PLEDs are directly laminated on the surface of skin and are used as indicators/displays owing to their amazing conformability as their superthin characteristics. Three-color PLEDs exhibit a high external quantum efficiency (EQE) and large luminescence (over 10,000 candelas per square meter at 10 V). The PLEDs are integrated with organic photodetectors and are used as pulse oximetry.
Biography：
Tomoyuki Yokota is Associate Professor of the School of Engineering at The University of Tokyo, Japan. He received his degree (Doctor of Engineering) in 2013 from the Department of Applied Physics, Graduate School of Engineering, The University of Tokyo. He spent Project Research Associate periods at the University of Tokyo (2013-16). In 2016, he joined the Faculty of Engineering, The University of Tokyo as a Senior Lecturer. In 2019, he was promoted to an Associate Professor. His current research interests include organic photonic devices, flexible electronics, printed electronics, large-area sensors, and wearable electronics. His honors include the Award for The 3rd Japan Open Innovation Prize from Minister of State for Science and Technology Policy Award (2021), the Young Scientists' Prize for the Commendation for Science and Technology by MEXT, Japan (2021), and Marubun Academic Award from Marubun Research Promotion Foundation, Japan (2024).
Contact：Prof. Wei Liu
