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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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ε-Branched Flexible Side Chain Substituted Diketopyrrolopyrrole-Containing Polymers Designed for High Hole and Electron Mobilities

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Title
ε-Branched Flexible Side Chain Substituted Diketopyrrolopyrrole-Containing Polymers Designed for High Hole and Electron Mobilities
Author
Han, A-ReumDutta, Gitish K.Lee, JunghoonLee, Hae RangLee, Sang MyeonAhn, HyungjuShin, Tae JooOh, Joon HakYang, Changduk
Issue Date
2015-01
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.25, no.2, pp.247 - 254
Abstract
Based on the integrated consideration and engineering of both conjugated backbones and flexible side chains, solution-processable polymeric semiconductors consisting of a diketopyrrolopyrrole (DPP) backbone and a finely modulated branching side chain (epsilon-branched chain) are reported. The subtle change in the branching point from the backbone alters the - stacking and the lamellar distances between polymer backbones, which has a significant influence on the charge-transport properties and in turn the performances of field-effect transistors (FETs). In addition to their excellent electron mobilities (up to 2.25 cm(2) V-1 s(-1)), ultra-high hole mobilities (up to 12.25 cm(2) V-1 s(-1)) with an on/off ratio (I-on/I-off) of at least 10(6) are achieved in the FETs fabricated using the polymers. The developed polymers exhibit extraordinarily high electrical performance with both hole and electron mobilities superior to that of unipolar amorphous silicon.
URI
https://scholarworks.unist.ac.kr/handle/201301/10076
URL
http://onlinelibrary.wiley.com/doi/10.1002/adfm.201403020/abstract
DOI
10.1002/adfm.201403020
ISSN
1616-301X
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