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Polymer Functions Lab
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A lab that uses light to observe the motion of electrons in polymers on molecular time and length scales.
AboutAbout the lab
Observing in molecular time, designing in molecular space.
The Polymer Functions Lab studies the optical, electronic, and ionic properties of polymers and their functions.
Using light as a tool, the lab directly observes the movement of energy and electrons on molecular time and length scales.
Energy transfer and electron transfer proceed on timescales from 100 femtoseconds to microseconds, so the lab tracks them with ultrashort pulse lasers.
To help solve energy problems, the lab is also developing polymer solar cells.
Key terms
- Conjugated polymer
- A polymer with a backbone of connected π electrons. It absorbs visible light and emits light efficiently.
- Ultrashort pulse laser
- A laser that emits light for only an extremely short time. It can capture phenomena that are too fast to see.
- Phase-separated structure
- A structure in which two immiscible materials are separated in a finely interwoven pattern.
NewsLab news
Announced the development of an antifouling polymer material for biosensors
Announced improved performance of organic thin-film solar cells using a new material that overturns conventional wisdom
Developed a technology that resolves a long-standing dilemma of organic thin-film solar cells and generates power without loss
A doctoral student received a Poster Award at KJF-ICOMEP2025
A master's student received an Outstanding Poster Award at the 6th Frontier Solar Cell Seminar
ResearchResearch themes
Centered on "polymer structure and optical/electronic functions," the lab observes ultrafast phenomena on molecular timescales with ultrashort pulse lasers, and controls phase-separated structures down to the nanometer scale on molecular length scales. It aims to create new functions by controlling molecular assembly structures.
*Illustrative imagePhotophysics and photochemistry of conjugated polymers
Conjugated polymers, in which π-conjugated molecules are linked together, are used in organic light-emitting diodes (OLEDs) and polymer solar cells. The lab uses time-resolved spectroscopy to clarify the phenomena that begin with excitons generated by light absorption.
*Illustrative imageOptoelectronic properties of conjugated polymers
When an electron-donating polymer and an electron-accepting polymer are mixed, electrons transfer and charge carriers are generated. The lab observes and controls this structure using conductive atomic force microscopy, and investigates how it relates to physical properties and functions.
*Illustrative imageDevelopment of high-efficiency polymer solar cells
The lab develops colorful, lightweight next-generation solar cells made by coating polymer materials that form solutions at room temperature.
MembersFaculty
The members of the Polymer Functions Lab consist of faculty, researchers, doctoral and master's students, and secretaries.
- ProfessorHideo Ohkita
- Associate ProfessorShunsuke Yamamoto
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: “Polymer organische Solarzelle 01” Kuebi = Armin Kübelbeck / CC BY-SA 3.0 (cropped)
- Photophysics and photochemistry of conjugated polymers: “P(NDI2OD-T2)” Simone Cimò / CC BY-SA 4.0 (cropped)
- Optoelectronic properties of conjugated polymers: “Afmgold” Wold, D.J. and Daniel Frisbie / CC BY-SA 3.0 (cropped)
- Development of high-efficiency polymer solar cells: “April 19, 2013- Standing in a 3D visualization room, Secretary Poneman “goes inside” the active layer of an organic solar cell, where sunlight is harvested” ENERGY.GOV / Public domain (cropped)
- Related lab (Biorecognition Chemistry Lab): “3D cell invasion assay” Kavmic / CC BY 4.0 (cropped)
- Related lab (Catalytic Reaction Chemistry Lab): “SPring-8 synchrotron SP8 BL01B1” Drac2000 at English Wikipedia / CC BY-SA 3.0 (cropped)
- Related lab (Transport Phenomena Lab): “A starling murmuration at Galashiels - geograph.org.uk - 5991163” Walter Baxter / CC BY-SA 2.0 (cropped)
- Related lab (Organic Molecular Materials Lab): “Close UP photo of lg c1 oled” TECH EDU / CC BY-SA 4.0 (cropped)
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