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양창덕

Yang, Changduk
Advanced Tech-Optoelectronic Materials Synthesis Lab.
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dc.citation.number 2 -
dc.citation.startPage 2309428 -
dc.citation.title ADVANCED FUNCTIONAL MATERIALS -
dc.citation.volume 34 -
dc.contributor.author Pankow, Robert M. -
dc.contributor.author Kerwin, Brendan -
dc.contributor.author Cho, Yongjoon -
dc.contributor.author Jeong, Seonghun -
dc.contributor.author Forti, Giacomo -
dc.contributor.author Musolino, Bryan -
dc.contributor.author Yang, Changduk -
dc.contributor.author Facchetti, Antonio -
dc.contributor.author Marks, Tobin J. -
dc.date.accessioned 2023-12-21T11:42:37Z -
dc.date.available 2023-12-21T11:42:37Z -
dc.date.created 2023-10-24 -
dc.date.issued 2024-01 -
dc.description.abstract A detailed investigation addressing the effects of functionalizing conjugated polymers with oligo(ethylene glycol) (EG(n)) sidechains on the performance and polymer-electrolyte compatibility of electrochromic devices (ECDs) is reported. The electrochemistry for a series of donor-acceptor copolymers having near-infrared (NIR)-optical absorption, where the donor fragment is 3,4-ethylenedioxythiophene (EDOT) or anEG(n) functionalized bithiophene (g2T) and the acceptor fragment is diketopyrrolopyrrole (DPP) functionalized with branched alkyl or EG(n) sidechains, is extensively probed. ECDs are next fabricated and it is found that EG(n) sidechain incorporation must be finely balanced to promote polymer-electrolyte compatibility and provide efficient ion exchange. Proper electrolyte-cation pairing and polymer structural tuning affords a 2x increase in optical contrast (from 12% to 24%) and >60x reduction in switching time (from 20 to 0.3 s). Atomic force microscopy (AFM)/grazing incidence wide-angle X-ray scattering (GIWAXS) characterization of the polymer film morphology/microstructure reveals that an over-abundance of EG(n) sidechains generates large polymer crystallites, which can suppress ion exchange. Lastly, time-of-flight secondary ion mass spectrometry (ToF-SIMS) indicates sidechain/electrolyte identity does not influence the electrolyte penetration depth into the films, and EG(n) sidechain inclusion increases electrolyte cation uptake. The material structural design insight and guidelines regarding the polymer-electrolyte ion insertion/expulsion dynamics reported here should be of significant utility for developing next-generation mixed ionic-electronic conducting materials. -
dc.identifier.bibliographicCitation ADVANCED FUNCTIONAL MATERIALS, v.34, no.2, pp.2309428 -
dc.identifier.doi 10.1002/adfm.202309428 -
dc.identifier.issn 1616-301X -
dc.identifier.scopusid 2-s2.0-85172863460 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/66009 -
dc.identifier.wosid 001075980300001 -
dc.language 영어 -
dc.publisher WILEY-V C H VERLAG GMBH -
dc.title Enhanced Optical Contrast and Switching in Near-Infrared Electrochromic Devices by Optimizing Conjugated Polymer Oligo(Ethylene Glycol) Sidechain Content and Gel Electrolyte Composition -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter -
dc.relation.journalResearchArea Chemistry; Science & Technology - Other Topics; Materials Science; Physics -
dc.type.docType Article; Early Access -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor conjugated polymers -
dc.subject.keywordAuthor electrochromics -
dc.subject.keywordAuthor mixed ionic-electronic conduction -
dc.subject.keywordAuthor NIR optical absorption -
dc.subject.keywordAuthor non-aqueous electrolyte -
dc.subject.keywordPlus FIELD-EFFECT TRANSISTORS -
dc.subject.keywordPlus ACCEPTOR POLYMERS -
dc.subject.keywordPlus MOLECULAR-WEIGHT -
dc.subject.keywordPlus MOBILITY -
dc.subject.keywordPlus GAP -

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