High performance organic thin-film transistors by room-temperature printing

2016 Fiscal Year Final Research Report

• Project/Area Number: 26286040
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Applied materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: Minari Takeo 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 独立研究者 (90443035)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: プリンテッドエレクトロニクス / フレキシブルエレクトロニクス / 有機トランジスタ / 有機半導体

Outline of Final Research Achievements

Here, we developed an ultra-high-resolution printing technique based on "surface selective deposition" that can deposit functional inks with 1-um resolution on flexible substrates. We used this technique to selectively deposit a metal nanoparticle ink and an organic semiconducting material, thereby allowing the large-scale fabrication of high-resolution electronic circuits including organic thin-film transistors with channels as short as 1 um under ambient atmosphere. We also developed π-junction gold nanoparticles as the electrode material which permitted room-temperature deposition of a conductive metal layer. The room-temperature process enables printing of electronic circuits without application of heat, thus thermal damage to the substrate can be totally avoided. These results indicate that this bottom-up fabrication method based on fluidic self-assembly is promising for the fabrication of large-area, high-resolution, low-cost electronics.

Free Research Field

有機半導体デバイス