Plenary Speaker
Advanced Organic Optoelectronic Devices: Precise Control of Charge-Transfer States
Prof. Chihaya Adachi obtained his doctorate in Materials Science and Technology in 1991 from Kyushu University. He held positions as a research chemist and physicist in the Chemical Products R&D Center at Ricoh Co., a research associate at Shinshu University, a research staff at Princeton University, and an associate professor and professor at Chitose Institute of Science and Technology. In 2005, he returned to Kyushu University as a professor and was promoted to a distinguished professor in 2010, and his current posts also include director of Kyushu University’s Center for Organic Photonics and Electronics Research (OPERA) since 2010 and director of the Fukuoka i3 Center for Organic Photonics and Electronics Research since 2013. His research has been concentrated on organic synthesis, device fabrication, and optical and electrical device characterization of organic semiconductors. He has been serving as an editor of “Organic Electronics” (Elsevier) (2007-2019) and CCS Chemistry (2019-). His publications include over 670 research papers. He was selected as a highly cited researcher (Clarivate) (2018-2025).
In organic optoelectronic devices, high performance has been achieved through precise molecular design that incorporates diverse electron-donating and electron-accepting units. These molecular architectures enable fine control over charge transport, exciton formation, charge separation, and even spontaneous dipole orientation in thin films.
From the perspective of charge-transfer phenomena, this presentation will focus on strategies to enhance both the efficiency and operational stability of organic light-emitting diodes (OLEDs). Furthermore, we elucidate the relationship between molecular-level design and macroscopic device performance, and provide an outlook on future directions in advanced organic optoelectronic devices.
