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Oyaizu Lab
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The lab designs molecules to create polymers that control electricity and light.
AboutAbout the lab
New polymers that store and carry electricity
The Oyaizu Lab starts from molecular design to synthesize new polymers and investigates the relationship between their structures and their electrical and optical properties.
Polymers densely packed with redox molecules that exchange electrons can separate, transport, and store charge.
Using these polymers, the lab is pioneering organic electronics unique to polymers, such as organic batteries, capacitors, and solar cells.
A distinctive feature is that it treats everything from clarifying the principles behind how functions arise to applying them in devices as one continuous challenge.
Key terms
- Redox polymer
- A polymer with many electron-donating and electron-accepting units attached to it. It can store and transport charge.
- Organic battery
- A battery that uses organic compounds instead of metals as electrode materials. It can be made light and flexible.
- Electron self-exchange
- The transfer of electrons between neighboring molecules. When repeated, it moves charge through the material.
NewsLab news
Two master's students received the Best Poster Award and the Excellent Poster Award at the 1st Young Researchers Poster Session of the RadTech Study Group
A master's student received the Best Poster Award at The 9th International Symposium on Polymer Chemistry
A master's student received the Excellent Poster Presentation Award at the 15th CSJ Chemistry Festa 2025 of the Chemical Society of Japan
A master's student received the Society of Polymer Science, Japan Excellent Poster Award at the 74th Symposium on Macromolecules
Discovery of a low-dielectric material with an extremely small dielectric loss tangent
ResearchResearch themes
The lab uses polymers densely packed with redox molecules to pioneer organic electronic materials based on electron transfer. Building on transport phenomena driven by redox gradients, it creates polymers that excel at separating, transporting, and storing charge, and explores their application to batteries, capacitors, solar cells, and light-emitting and display devices.
*Illustrative imageTransparent resins that bend light strongly
The more strongly a resin used in lenses bends light (the higher its refractive index), the thinner and smaller the lens can be. By combining sulfur, iodine, and hydrogen bonds, the lab designs transparent, heat-resistant polymers with a very high refractive index.
*Illustrative imageLow-loss resins for high-speed communication
In next-generation communication at higher frequencies, the materials of wiring substrates tend to lose signal. By refining sulfur-containing aromatic polymers, the lab makes flame-retardant materials with very low dielectric loss.
*Illustrative imagePolymers that store electricity
Polymers with many electron-exchanging molecules lined up along them can serve as battery materials. The lab develops polymers for safe aqueous flow batteries and for systems that generate electricity from temperature differences.
MembersFaculty
- ProfessorKenichi Oyaizu
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Fabrication of nanosheet by cast film method” Botasuleimen / CC BY-SA 4.0 (cropped)
- Transparent resins that bend light strongly: “Convex lens (magnifying glass) and upside-down image” AntanO / CC BY-SA 4.0 (cropped)
- Low-loss resins for high-speed communication: “Sharp LC-20SD4E - board 4-9996” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Polymers that store electricity: “Redox Flow Battery English” Nick B, benboy00 / CC BY-SA 3.0 (cropped)
- Related lab (Momma Lab): “Coin-cells” Gerhard H Wrodnigg / CC BY-SA 2.5 (cropped)
- Related lab (Suga Lab): “Nailoni süntees 2” Thctamm / CC BY-SA 3.0 (cropped)
- Related lab (Sugahara Lab): “Nacre sticks” Mauro Cateb / CC BY-SA 3.0 (cropped)
- Related lab (Kobori Lab): “Cutaway of a microfiltration module with hollow fiber membranes at a NEWater plant” Z22 / CC BY-SA 4.0 (cropped)
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