Development of high-precision threshold voltage control technology for organic thin-film transistors

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18975
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 29:Applied condensed matter physics and related fields
• Research Institution: Osaka University
• Principal Investigator: UEMURA TAKAFUMI 大阪大学, 産業科学研究所, 准教授 (30448097)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: フレキシブルセンサ / 有機トランジスタ / しきい値電圧制御

Outline of Final Research Achievements

This research was conducted to establish a high-precision characteristic control technology for flexible organic electronic circuits to achieve both high-precision analog signal processing and ultra-low power consumption operation, which are required for next-generation flexible sensor technology. Through this research, we succeeded in arbitrarily controlling the threshold voltage of p-/n-type flexible organic transistors with a high precision of 0.1 V. As a result, an nW-level ultra-low power consumption circuit was realized. In addition to the control of the threshold voltage, we also developed a new technique to reduce the contact resistance of the metal-semiconductor junction and demonstrated that this technique is also effective for high-speed operation of the flexible organic device.

Free Research Field

フレキシブルエレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

本研究を通して、同一基板上の任意の場所において、p型/n型のフレキシブル有機トランジスタのしきい値電圧を自在に制御可能な技術を実現した。またこれにより、3V程度の低電圧で駆動する相補型回路の駆動を実証し、消費電力や動作速度などを自在に制御できる事を示した。以上の研究成果はウェアラブルセンサ等に組み込まれるアナログ電子回路技術への応用において重要な技術であり、フレキシブル有機トランジスタの産業応用を加速する成果である。