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Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab (ATOMS)
Research Interests
  • Optoelectronic materials synthesis/organic electronics, functionalization of carbonaceous solids, advanced materials chemistry, macromolecular chemistry

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An Ultrahigh Mobility in Isomorphic Fluorobenzo[c]-[1,2,5]thiadiazole-Based Polymers

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Title
An Ultrahigh Mobility in Isomorphic Fluorobenzo[c]-[1,2,5]thiadiazole-Based Polymers
Author
Lee, JunghoonKang, So-HueiLee, Sang MyeonLee, Kyu CheolYang, HeesooCho, YongjoonHan, DaeheeLi, YongfangLee, Byoung HoonYang, Changduk
Keywords
cyclopentadithiophene;  fluoro-benzothiadiazole;  organic field-effect transistors;  polymer chemistry;  regioregularity
Issue Date
201810
Publisher
WILEY-V C H VERLAG GMBH
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.57, no.41, pp.13629 - 13634
Abstract
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.
URI
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DOI
http://dx.doi.org/10.1002/anie.201808098
ISSN
1433-7851
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