Thermo-switchable Dual-mode Displaying Media Enabling Multi-color Control of Both Emission and Coloration

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  • OGASAWARA Kouki
    Graduate School of Advanced Integration Science, Chiba University
  • KANAZAWA Kenji
    Graduate School of Advanced Integration Science, Chiba University Department of Chemical and Biomolecular Engineering, Yonsei University
  • NAKAMURA Kazuki
    Graduate School of Advanced Integration Science, Chiba University Molecular Chirality Research Center, Chiba University
  • KOBAYASHI Norihisa
    Graduate School of Advanced Integration Science, Chiba University Molecular Chirality Research Center, Chiba University

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Leuco dyes, well-known multi-functional material, can exhibit excellent thermochromic properties by combining with developer molecule which is organic compound having a hydroxyl group and long alkyl chain. Our purpose of this research is to fabricate multifunctional material enabling control of both emission and coloration by combining leuco dye-developer system with emission materials. In this study, we investigated novel thermo-responsive dual-mode displaying media showing both reflective and emissive modes in red-green-blue (RGB) three primary colors. We employed the two kinds of leuco dye derivatives into the polymeric film as thermochromic material in order to improve the switching contrast of the emissive mode. As a result, we successfully demonstrated the control of coloration and emission in RGB colors with large contrast by thermal treatments.

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