- 著者
- Masayoshi Higuchi Yukio Fujii Yoji Hisamatsu
- 出版者
- The Institute of Image Information and Television Engineers
- 雑誌
- ITE Transactions on Media Technology and Applications (ISSN:21867364)
- 巻号頁・発行日
- vol.9, no.4, pp.228-233, 2021 (Released:2021-10-01)
- 参考文献数
- 21
Metallo-supramolecular polymers (MSPs) are a novel type of electrochromic (EC) materials. Ru(II)-based MSP (polyRu) composed of Ru(II) and bis(terpyridyl)benzene showed reversible color changes between orange and pale green. The orange color was caused by the metal-to-ligand charge transfer (MLCT) absorption in polyRu and disappeared by the electrochemical oxidation of Ru(II) to Ru(III). The pale green was returned to the original orange by the electrochemical reduction of Ru(III) to Ru(II). EC devices with polyRu were fabricated by the combination of an electrolyte solution, counter material, and two ITO glasses. The character images were displayed on the EC devices using insulating films. The insulating films prevented the electron transfer between the ITO glass and the polyRu layer and made the image stand out in the device. The fabricated EC display devices were presented at a science museum of Japan as experience-based exhibits.
- 著者
- Masayoshi Higuchi Yukio Fujii
- 出版者
- The Society of Photopolymer Science and Technology(SPST)
- 雑誌
- Journal of Photopolymer Science and Technology (ISSN:09149244)
- 巻号頁・発行日
- vol.34, no.2, pp.175-180, 2021-06-11 (Released:2021-11-23)
- 参考文献数
- 20
- 被引用文献数
- 3
Electrochromic (EC) displays are expected as energy-saving smart windows or digital signages because of the memory property. We succeeded in developing a designed and flexible electrochromic (EC) display device with Fe(II)-based metallo-supramolecular polymer (polyFe) using a mechanically etched ITO film. Mechanical etching an ITO film was performed with a cutting machine having a blade of which length was adjusted so as not to cut off the film. The fabricated EC device was composed of the etched ITO film, a polyFe layer, an electrolyte layer, a nickel hexacyanoferrate layer as the counter material, and another ITO film. The EC device showed unique changes of the display upon applying a voltage of 1.5 V between the two ITO electrodes. It was revealed that the EC changes were controlled by the etching pattern such as a closed circle or the formation of a narrow ITO path.