120th General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Exhibition Hall 2+3
Time 10월 20일 (금요일) 13:00~14:30
Code POLY.P-44
Subject Design of electrochromic polymers for high color contrast with a long bistability
Authors Yeonghwan Heo, younghoon kim, Byeonggwan Kim, Eunkyoung KIM*
Department of Chemical and Biomolecular Engineerin, Yonsei University, Korea
Abstract Conjugated polymers (CPs) show reversible electrochemical optical changes with a high coloration efficiency, which can be applied for external light control such as smart windows, smart sunglasses, and active displays. Among the CPs, Poly(3,4-propylenedioxythiphene) derivatives(PRs) were explored as an electrochromic polymer for high color contrast with long term bistability. To tune HOMO energy level that is critical to bistability of polymers, various functionalized PRs were prepared in three steps. Furthermore, reduce applied potential with same transmittance change with charge balancing layer using TiO2 nanoparticles. Charge balancing layer can highly improve cycle stability of electrochromic windows. Design principle and electrochromic properties of PRs in a 2-electrode device will be presented.
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