Flexible electrochromic devices prepared on ultra-thin ITO glass. Issue 14 (11th June 2021)

• Record Type: Journal Article
• Authors: Schott, Marco; Niklaus, Lukas; Müller, Christine; Bozkaya, Begüm; Giffin, Guinevere A.
• Is Part Of: Materials advances. Volume 2:Issue 14(2021)
• Page Start: 4659
• Page End: 4666
• Publication Date: 2021-06-11
• Subjects: 620.11
• DOI: 10.1039/d1ma00376c
• Languages: English
• ISSNs: 2633-5409

Abstract

Abstract : Electrochromic devices (ECDs) containing iron-based metallo-supramolecular polymers (Fe-MEPE) and Prussian blue (PB) as electrode materials, polymer electrolyte and flexible ultra-thin ITO glass as transparent conductive substrate are demonstrated. Abstract : Electrochromic devices (ECDs) containing iron-based metallo-supramolecular polymers (Fe-MEPE) and Prussian blue (PB) as active electrode materials, a polymer electrolyte and flexible ultra-thin indium tin oxide (ITO) glass as transparent conductive substrate are demonstrated here. The electrochromic Fe-MEPE and PB thin films were deposited on ultra-thin ITO glass by means of dip coating and electrodeposition, respectively, and characterized optically and (spectro-)electrochemically. By applying a low voltage of 2.5 V/−0.5 V, the Fe-MEPE/PB ECDs can be reversibly switched from a blue-colored dark state to a nearly colorless bright state with a visible light transmittance ( τ v ) change from 8% to 58%. The devices exhibit a fast response for decoloration/coloration and good cycling stability tested over 250 switching cycles without any substantial loss of optical contrast. Thus, these ECDs based on ultra-thin glass are very attractive for flexible, lightweight, and low-power electrochromic applications, e.g., in architectural or automotive glazing, aircraft, marine, home appliances, and displays.