Chan-Heon An , Soo-Yeon Eom , Jae-Hwan Lee , Fayong Sun , Jong S. Park , Seung-Won Oh
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Highly transparent to deep black electrochromic smart windows based on liquid crystals
This study introduces advanced organic electrochromic devices (ECDs) that incorporate liquid crystals (LCs) to achieve tunable light transmittance, enabling seamless transitions between a highly transparent and a deep black state. By integrating LCs with redox-active components, the proposed ECDs exhibit precise electrochromic color modulation upon voltage application. A detailed investigation of chromatic transitions and electro-optical properties reveals fast response times, enhanced stability, and strong potential for smart window and display applications. A comparative analysis with existing technologies, including guest-host LC (GHLC), and polymer network LC (PNLC) systems, highlights the superior performance of the proposed devices in terms of transmittance modulation, privacy control, and energy efficiency. These findings position LC-based ECDs as promising candidates for next-generation smart windows, energy-efficient privacy management, thermal regulation, and high-performance display technologies.
期刊介绍:
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.