This is expected to simplify element formation and improve element performance.
Monozukuri (Saitama University Research Seed Collection 2025-27 p.71)
Keywords: Liquid crystal materials, electrochromic materials, organic semiconductor materials, display elements, electrolytes, donor-acceptor structures.
The advantage of electrochromic (EC) materials lies in their ability to reversibly change color through electrochemical oxidation and reduction, which allows for the application of electronic paper that can display color without the need for color filters. However, most of these materials are polymer-based and have issues with response speed and contrast. We are investigating liquid crystal materials with EC properties, and we expect that if such compounds can be developed, it will lead to improved response speeds due to easier orientation control. Furthermore, previous research on EC materials has primarily focused on changing color through either oxidation or reduction. Therefore, we are considering applications as color display devices and are developing liquid crystal EC materials that can change color tones through electrochemical control on both the oxidation and reduction sides.
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Mikio Yasutake, Lecturer Research Institute, Scientific Analysis Support Center 【Recent Research Themes】 ● Development of n-type liquid crystalline organic semiconductor materials ● Development of donor-acceptor type liquid crystalline organic semiconductor materials
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【Appeal Points to the Industry】 ● Many of the molecular structures that make up electronic devices are often polymer structures that have been extensively studied, but they tend to be rigid and lack processability. In contrast, liquid crystals, which possess both fluidity and order, have advantages such as the ability to form uniform thin films. Additionally, they can be reorganized through heating and cooling operations, making them advantageous. Furthermore, incorporating electron acceptor and donor sites into the molecular structure of liquid crystal compounds is a distinctive and innovative aspect of this research. This study focuses on the development of materials with diverse electrochromism possibilities. 【Examples of Practical Use, Applications, and Utilization】 ● EC devices can maintain their color once changed, without the need for continuous voltage, making them suitable for use as eco-friendly display devices. They are well-suited for displays such as price tags and advertisements. ● Moreover, when combined with organic semiconductor materials, they can also serve as components that indicate degradation in computer parts.
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.