https://scholars.lib.ntu.edu.tw/handle/123456789/576885
標題: | Thienoisoindigo (TII)-Based Quinoidal Small Molecules for High-Performance n-Type Organic Field Effect Transistors | 作者: | CHENG-LIANG LIU et al. SHIH-HUANG TUNG et al. |
關鍵字: | Crystal atomic structure; Electron transport properties; Molecules; Single crystals; Synthesis (chemical); Transistors; Electron transport; Electron transporting; Intermolecular distance; Organic small molecule; Single crystal x-ray diffraction; Solution processable; Thin film morphology; Transport characteristics; Organic field effect transistors | 公開日期: | 2021 | 卷: | 8 | 期: | 1 | 來源出版物: | Advanced Science | 摘要: | A novel quinoidal thienoisoindigo (TII)-containing small molecule family with dicyanomethylene end-capping units and various alkyl chains is synthesized as n-type organic small molecules for solution-processable organic field effect transistors (OFETs). The molecular structure of the 2-hexyldecyl substituted derivative, TIIQ-b16, is determined via single-crystal X-ray diffraction and shows that the TIIQ core is planar and exhibits molecular layers stacked in a “face-to-face” arrangement with short core intermolecular distances of 3.28 ?. The very planar core structure, shortest intermolecular N···H distance (2.52 ?), existence of an intramolecular non-bonded contact between sulfur and oxygen atom (S···O) of 2.80 ?, and a very low-lying LUMO energy level of ?4.16?eV suggest that TIIQ molecules should be electron transporting semiconductors. The physical, thermal, and electrochemical properties as well as OFET performance and thin film morphologies of these new TIIQs are systematically studied. Thus, air-processed TIIQ-b16 OFETs exhibit an electron mobility up to 2.54 cm2 V?1 s?1 with a current ON/OFF ratio of 105–106, which is the first demonstration of TII-based small molecules exhibiting unipolar electron transport characteristics and enhanced ambient stability. These results indicate that construction of quinoidal molecule from TII moiety is a successful approach to enhance n-type charge transport characteristics. ? 2020 The Authors. Published by Wiley-VCH GmbH |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096720180&doi=10.1002%2fadvs.202002930&partnerID=40&md5=75c10805c6f8478d4ea6f81440c3e216 https://scholars.lib.ntu.edu.tw/handle/123456789/576885 |
ISSN: | 21983844 | DOI: | 10.1002/advs.202002930 |
顯示於: | 材料科學與工程學系 |
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