A High-Speed Passive-Matrix Electrochromie Display Using a Mesoporous TiO2 Electrode with Vertical Porosity

摘要

Recently, the application of electronic paper (E-paper) has attracted considerable attention. Many types of reflective displays, such as reflective liquid crystal displays'11 and electrophoretic displays, have been introduced and applied to E-paper. Among them, electrochromie materials, which change in color intensity when an appropriate potential is applied, are the subject of an increasing number of reports. Recently, polymers such as poly(3,4-ethylenedioxythiophene) (PEDOT) or catenanes were reported to show electrochromic behavior. The slow response time for coloring has been a serious problem with these kinds of polymers. As probable electrochromie materials, viologens have commonly been utilized for electrochromie displays (ECDs). Many studies have focused on viologen-modified microspheres or nanostructures to increase the switching speed.