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説明:

Numerous rod-like organic molecules self-organize into layered structures, as demonstrated in various systems, including smectic liquid crystals, micelles, and lipid bilayers, owing to side-by-side intermolecular interactions. These layered structures are of interest to another class of layered molecular assemblies in the solid state, namely, small-molecule organic semiconductors (OSCs). Many OSCs are composed of various π-electron cores substituted with flexible side chains. Layered-structure formation is important in OSC systems because it enables the production of aligned molecular layers interfaced with gate dielectric layers, which are used to fabricate high-performance organic thin-film transistors (OTFTs). Using these rod-shaped OSCs, we developed a technique for fabricating single-crystal thin films of uniform thickness at the molecular level by introducing a geometric frustration effect between the layers. We also selectively produced crystalline polymorphs with distinct herringbone packing motifs. By producing these layer-controlled films on the trap-minimized surface of gate insulators, we fabricated OTFTs exhibiting sharp on/off switching characteristics approaching the Boltzmann limit. In this paper, we introduce recent techniques for the rational design of organic semiconductors.

権利情報:

• In Copyright
  Copyright 2024 Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.
  
  S. Arai, "Advanced self-assembly control of rod-shaped organic semiconductors," Proc. SPIE 12907, Emerging Liquid Crystal Technologies XIX, 1290705 (13 March 2024); https://doi.org/10.1117/12.3001198

キーワード: organic semiconductors, self-assembly, sharp-switching transistors

刊行年月日: 2024-03-13

出版者: SPIE

掲載誌:

• Proceedings of SPIE - The International Society for Optical Engineering (ISSN: 0277786X) vol. 12907 1290705

研究助成金:

• JSPS KAKENHI 21H05234
• JSPS KAKENHI 22H01933
• JST PRESTO JPMJPR23N1
• MEXT Leading Initiative for Excellent Young Researchers JPMXS0320220012

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1117/12.3001198

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更新時刻: 2024-08-19 16:30:26 +0900

MDRでの公開時刻: 2024-08-19 16:30:26 +0900