Operand measurements for evaluating and analyzing organic device operation

2021 Fiscal Year Final Research Report

• Project/Area Number: 18H01473
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Manaka Takaaki 東京工業大学, 工学院, 教授 (20323800)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Keywords: 有機デバイス / 光第二次高調波発生

Outline of Final Research Achievements

In organic semiconductor devices such as organic light emitting diodes (OLEDs), the performance of which has been remarkably improved in recent years, there are still fundamental aspects of device operation mechanisms that are not well understood. We have developed new methods to evaluate electronic devices using optical techniques and have been evaluating device operation using these methods. This is called operando measurement. As a result, we were able to evaluate the generalized Einstein relationship in organic semiconductor materials, the carrier transport mechanism in organic transistors, and the carrier generation process from excitons in organic solar cells. We also constructed a novel microscope to visualize three-dimensional information of electric fields, which cannot be directly observed.

Free Research Field

有機エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

有機半導体デバイスは、軽量や安価、柔軟性などの特徴を持ち、実用化されれば我々の生活を豊かにすることが期待される。一方、現状では、有機EL以外のデバイスは実用化させておらず、今後有機トランジスタや有機単葉電池の実用化が待たれている。本研究で提案している測定手法は、これらデバイスの実用化に不可欠となる、デバイスの動作機構解明に関する情報を与えてくれるため、デバイスの実用化に貢献することができる。