preparation for high quality polymer semiconductor thin film by adsorbing deposition in suspension

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K06353
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Nagamatsu Shuichi 九州工業大学, 大学院情報工学研究院, 准教授 (70404093)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 有機半導体 / 導電性高分子 / 結晶成長 / 薄膜 / 有機デバイス

Outline of Final Research Achievements

Regarding the formation of organic semiconductor polymer nanofibrils in the liquid phase, we succeeded preparing high-quality nanofibrils of organic semiconductor polymer produced by controlling the self-aggregation property of them using solvent species, concentration, and time as parameters. We developed an adsorbing deposition in suspension method obtaining a thin film on a solid substrate by using the physical adsorption phenomenon in suspension. Only the nanofibril in the suspension was adsorbed to the substrate, and we succeeded in obtaining a highly crystalline thin film with no amorphous regions due to dissolved components. Furthermore, improvement of crystallinity of thin film was occurred by post-heat treatment, and succeeded in improving the performance of the organic thin film transistor utilizing them. We propose a novel thin film preparation method using suspensions to obtain high quality and highly crystalline thin films of organic semiconductor polymers.

Free Research Field

有機エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

本研究成果は成膜法としては極めて簡易なシステムで遂行することが出来き、各種デバイスに適用可能なこれまでにない高い普及性を持った成膜技術と位置付けられる。また本手法では材料に良好な溶解性は必要なく、これまでにない新たな材料設計指針を提供するきっかけになり得る。本手法のノウハウの明文化により、有機半導体結晶性薄膜の量産化の可能性を示し、非常に意義のある研究成果である。