Printed Multicolor High-Contrast Electrochromic Devices

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• 作者：Bo-Han Chen ; Sheng-Yuan Kao ; Chih-Wei Hu ; Masayoshi Higuchi ; Kuo-Chuan Ho ; Ying-Chih Liao
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 18, 2015
• 年：2015
• 卷：7
• 期：45
• 页码：25069-25076
• 全文大小：483K
• ISSN：1944-8252

文摘

In this study, electrochemical responses of inkjet-printed multicolored electrochromic devices (ECD) were studied to evaluate the feasibility of presenting multiple colors in one ECD. Metallo-supramolecular polymers (MEPE) solutions with two primary colors were inkjet-printed on flexible electrodes. By digitally controlling print dosages of each species, the colors of the printed EC thin film patterns can be adjusted directly without premixing or synthesizing new materials. The printed EC thin films were then laminated with a solid transparent thin film electrolyte and a transparent conductive thin film to form an ECD. After applying a dc voltage, the printed ECDs exhibited great contrast with a transmittance change (螖T) of 40.1% and a high coloration efficiency of 445 cm² C^鈥? within a short darkening time of 2 s. The flexible ECDs also showed the same darkening time of 2 s and still had a high 螖T of 30.1% under bending condition. This study demonstrated the feasibility to fabricate display devices with different color setups by an all-solution process and can be further extended to other types of displays.