Prof. Toshihiro Okamoto; Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Institute of Science Tokyo

"Innovative Molecular Design Strategies for High-Mobility and Robust Organic Semiconductors"

Accelerating the development of high-performance next-generation organic semiconductors requires a profound understanding of the relationship between solidstate molecular packing and carrier transport. This talk will highlight our recent advancements in the molecular design of both p-type and n-type small-molecule organic semiconductors. Initially, a conceptually novel class of bent-shaped π-conjugated cores exhibiting remarkable hole mobilities will be introduced. This design strategy is then extended to n-type materials, focusing on the development of BQQDI derivatives. Using advanced solution-processing techniques, such as the edge-casting method, the successful fabrication of inch-sized, layer-controlled organic single crystals has been achieved. Furthermore, the fundamental physics underlying these materials will be explored, particularly the coexistence of ultra-long spin relaxation times and coherent charge transport.

Toshihiro Okamoto is a Professor in the Department of Chemical Science and Engineering, School of Materials and Chemical Technology, at the Tokyo InInstitute of Science Tokyo, a position he has held since October 2024. He received his B.S. (1999) and Ph.D. (2003) from Osaka City University, and subsequently held research and faculty positions at Stanford University, RIKEN, Osaka University, and the University of Tokyo before joining his current institution. His research focuses on organic synthetic chemistry and organic electronics, particularly the molecular design of high-mobility, high-stability organic semiconductors based on novel π-electronic systems for next-generation printed and flexible electronics. His honors include the Chemical Society of Japan Award for Creative Work (2022) and the SSOCJ Fujifilm Award in Synthetic Organic Chemistry (2022).

 
Contact persons:
Univ.-Prof. Davide Bonifazi - davide.bonifazi@univie.ac.at
Alma Krpuljevic-Hanic - alma.krpuljevic-hanic@univie.ac.at
Yvonne Walter – institute.orgchem@univie.ac.at