An Ultrahigh Mobility in Isomorphic Fluorobenzo[c]-[1,2,5]thiadiazole-Based Polymers
- 주제(키워드) cyclopentadithiophene , fluoro-benzothiadiazole , organic field-effect transistors , polymer chemistry , regioregularity
- 주제(기타) Chemistry, Multidisciplinary
- 설명문(일반) [Lee, Junghoon; Kang, So-Huei; Lee, Sang Myeon; Lee, Kyu Cheol; Cho, Yongjoon; Han, Daehee; Yang, Changduk] UNIST, Low Dimens Carbon Mat Ctr, Perovtron Res Ctr, Dept Energy Engn,Sch Energy & Chem Engn, 50 UNIST Gil, Ulsan 44919, South Korea; [Lee, Junghoon] Dongseo Univ, Div Chem Engn, 47 Jurye Ro, Busan 47011, South Korea; [Li, Yongfang] Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China; [Yang, Heesoo; Lee, Byoung Hoon] Ewha Womans Univ, Div Chem Engn & Mat Sci, Seoul 03760, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 WILEY-V C H VERLAG GMBH
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000156895
- 본문언어 영어
- Published As http://dx.doi.org/10.1002/anie.201808098
초록/요약
To understand the effects rendered on the relevant basic physical properties and device function by controlling the regiochemistry of the cyclopenta[1,2-b:5,4-b'] dithiophene-fluorobenzo[c][1,2,5] thiadiazole polymer (hereafter referred to as the CDT-FBT polymer), two polymers, the regiorandom polymer (RA) and regioregular version (RR), respectively, are synthesized and characterized. In addition, an efficient route for synthesizing a key monomer for RR using various synthesis scope and optimizing the reaction conditions is discussed. Although RA exhibits optical, electrochemical, and morphological properties similar to RR, it shows better field-effect transistor (FET) performance. Surprisingly, by employing a capillarity-mediated sandwich-casting process on a nano-grooved substrate, an unprecedented mobility of 17.8 cm(2) V-1 s(-1) is obtained for RA-based FETs; this mobility value is almost twofold greater than those of the corresponding RR-based FETs. For the first time, this study challenges previously reported results in that high carrier mobility is related to the high degree of polymer order induced by the backbone regioregularity.
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