Journal
ORGANIC ELECTRONICS
Volume 100, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2021.106395
Keywords
Electrochromic device; Viologen; Transparent display; Printing
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF2019R1A2C1004499]
- Basic Study and Interdisciplinary R&D Foundation Fund of the University of Seoul 2021
- Materials and Components Technology Development Program [20013097]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry, and Energy (MOTIE, Korea) [20204010600100]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20204010600100] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A new poly(viologen) material containing a biphenyl group was synthesized and utilized in EC devices, exhibiting three different colors based on its redox states. Color-switchable EC displays with various patterns were demonstrated using electro-force-assisted dispensing printing.
Electrochromic (EC) materials have attracted considerable attention for various applications, such as smart windows, information displays, and functional energy storage devices. In particular, poly(viologen) are promising EC materials owing to their flexible color tunability depending on the N-substituents and molecular weight. In this study, a new poly(viologen) containing biphenyl group and viologen (denoted as BP-poly(viologen)) was synthesized and employed in ion gel-based-EC devices (ECDs). Hydroquinone (H2Q) was used as the anodic species, and the H2Q/BP-poly(viologen) mole ratio was adjusted to obtain a balanced charge for the desired redox states of BP-poly(viologen). The resulting ECDs exhibited three different colors depending on the redox states of BP-poly(viologen): orange (dications), green (radical cations), and purple (neutral species). Colorswitchable EC displays with various patterns were demonstrated using electro-force-assisted dispensing printing.
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