Understanding and control of structure and electronic state of thin film of highly ordered organic semiconductor molecule via photoelectron-imaging

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K15176
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 29020:Thin film/surface and interfacial physical properties-related
• Research Institution: Ritsumeikan University (2021, 2023); Institute for Molecular Science (2020)
• Principal Investigator: Hasegawa Yuri 立命館大学, 理工学部, 助教 (60829464)
• Project Period (FY): 2022-12-19 – 2024-03-31
• Keywords: 自己組織化分子膜 / 有機半導体低分子 / 角度分解光電子分光法 / 走査トンネル顕微鏡

Outline of Final Research Achievements

In this research project, we attempted to measure the electronic structure of organic semiconductor thin films by means of angle-resolved photoemission spectroscopy, using an experimental system capable of obtaining both energy and spatial information of molecular orbital. For this purpose, we have worked on the detection of novel electronic states of highly oriented organic molecular thin films at an angle-resolved photoemission spectroscopy experimental station using synchrotron radiation, and on the deposition of highly oriented molecular thin films using the template effect of the substrate.

Free Research Field

表面科学

Academic Significance and Societal Importance of the Research Achievements

本研究課題では，次世代デバイスとして注目されている有機半導体薄膜を対象とした構造と電子状態の制御研究を行った．新規な光電子分光計測法を開拓し，従来の手法では得難い，分子薄膜のエネルギー-波数空間の情報を効率的に取得することができた．また，本手法の計測に適した実験系の探索も進めた．今後，エネルギー-波数空間における電子状態を明らかにすることで，有機半導体薄膜の構造-電子状態制御手法の発展に貢献することが期待できる．