(This article is a reprint of an original published on 06/21/2022) Yoichi Yamada, Associate Professor, and Soichiro Takeiri, Associate Professor, in the Department of Pure and Applied Mathematics, University of Tsukuba, in collaboration with Keiki Fukumoto, Project Associate Professor, Institute for Materials Structure Science, High Energy Accelerator Research Organization (KEK), have successfully visualized the movement of conduction electrons in organic transistors under operating conditions using a femtosecond photoelectron microscope (femtosecond photoemission microscope), using a femtosecond pulse laser as an excitation source. The team succeeded in visualizing the movement of conduction electrons in organic transistors under operating conditions. Precise measurement of electrons in organic materials is still a very difficult task, […]

(This article is a reprint of an original published on 06/02/2022) Associate Professor Haneda and his colleagues have developed a table-top size electron diffraction system that can observe structural changes occurring in less than one trillionth of a second (100 femtosecond) upon photoexcitation. The newly developed device is expected to contribute to the development of ultrafast and highly efficient materials for various optical devices such as optical memory and optical energy conversion in the future. For more information, please visit here (Japanese only).

山田准教授らは、次世代OLED材料である熱活性型遅延蛍光（TADF)分子膜に注目し、その特徴的な発光を支配する励起子の挙動を直接観察することに成功しました。本研究で提案された手法により、未だ十分に解明されていないTADFの本質解明と、デバイス応用に非常に有益な知見が得られることが期待されます。詳しくはこちらを御覧ください。