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Organic Photonics and Electronics Lab
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The lab makes 0.1-micron organic thin films emit light to create the next generation of light-emitting devices.
AboutAbout the lab
Producing light from organic thin films.
The Organic Photonics and Electronics Lab has led the world in pioneering the science and technology of organic EL (OLED), in which an electric current is passed through a thin film of organic compound about 0.1 micron thick to make it emit light.
The lab has discovered the world's first electron-transport material, created thermally activated delayed fluorescence (TADF) molecules, which are regarded as third-generation OLED emitters, and developed organic semiconductor lasers.
Recently, it has also taken on new research, such as thermoelectric devices using organic CT interfaces and molecules that combine two-photon absorption with TADF.
Built on five foundational technologies (quantum chemical calculation, organic synthetic chemistry, device structure design, process control, and analysis of the physical properties of optical and electronic devices), the lab aims to integrate basic research in exciton engineering with applied research that produces materials and devices.
Key terms
- Organic EL
- A device that emits light when an electric current is passed through a thin film of organic compound. Also called OLED, it is used in displays and other products.
- Thermally activated delayed fluorescence (TADF)
- A mechanism in which a molecule that has moved into a non-emissive state returns with the help of heat and emits light after a delay.
- Organic semiconductor laser
- A laser that uses an organic material as its light-emitting layer. The goal is to make it lase under an electric current.
NewsLab news
A master's student received the Outstanding Poster Award at the Young Researchers' Meeting on Organic Reaction Mechanisms
Distinguished Professor Chihaya Adachi was named a Clarivate Citation Laureate
A master's student received the Young Researcher Encouragement Award at the 63rd Joint Kyushu Conference of Chemistry-Related Chapters
A doctoral student received the Presentation Award at the presentation meeting of the International Course on Molecular Systems Chemistry
Professor Chihaya Adachi and Assistant Professor Yohei Chitose developed next-generation organic materials that link light-emitting technology and medicine
ResearchResearch themes
Thorough analysis of the optoelectronic properties of organic electronics and construction of theory, advancement of organic thin-film processes, challenges in new devices, and creation of the new materials that make them possible. By aligning these four directions, the lab is pioneering the next generation of organic electronics.
*Illustrative imageOrganic Light-Emitting Diodes
Since the introduction of device structures made of stacked thin films, basic research and development have advanced worldwide, and OLEDs are now in practical use in automotive and mobile device displays. The lab covers a wide range, from developing new materials to fabricating devices, device physics, and applications.
*Illustrative imageOrganic Laser Diodes
As a next-generation light-emitting device following organic EL, the lab aims to realize organic semiconductor lasers. Its work includes developing low-threshold materials, injecting large currents into organic thin films, and studying the unusual optical amplification phenomenon that occurs near the cutoff wavelength of an optical waveguide.
MembersFaculty
The members of the Organic Photonics and Electronics Lab consist of faculty, secretaries, postdocs, technical staff, graduate students, and undergraduate students doing their graduation research.As of 2026
- Senior ProfessorChihaya Adachi
- Associate ProfessorMasaki Tanaka
- Assistant ProfessorYohei Chitose
- Specific Project Assistant ProfessorTharindu Rajakaruna
- Specific Project Assistant ProfessorShota Fukuma
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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: “Thin Film Interference Soap Bubble” Pksois23 / CC BY-SA 4.0 (cropped)
- Organic Light-Emitting Diodes: “Fluorescein in ammonia solution (Part 20)” RaúlCHTRY / CC BY-SA 4.0 (cropped)
- Organic Laser Diodes: “SpecklePattern01” Clement Eustache / CC BY-SA 4.0 (cropped)
- Related lab (安田研究室
（高等研究院） ): “OLED SUBPIXELS” TECH EDU / CC BY-SA 4.0 (cropped) - Related lab (カーボンニュートラル研究室
（カーボンニュートラル・ エネルギー国際研究所） ): “Solar Panels and Wind Generator - geograph.org.uk - 1218592” David Stowell / CC BY-SA 2.0 (cropped) - Related lab (有機機能分子化学研究室): “Organic Chemistry Lab by marthou” Marthou / CC BY-SA 4.0 (cropped)
- Related lab (応用無機化学研究室): “Bishnoi -- Brennofen” Wolfgang Sauber / CC BY-SA 4.0 (cropped)
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