Toward simplified electrochromic devices using silver as counter electrode material

Abdelaadim Danine (1) , Laura Manceriu (1) , Cyril Faure (1) , Christine Labrugère (1) , Nicolas Penin (1) , Anastasia Delattre (2) , Guy Eymin-Petot-Tourtollet (2) , Aline Rougier (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 CTP - Centre Technique du Papier

Novel design of electrochromic devices (ECDs) known for their ability to modify optical properties under an applied voltage, based on a minimization of the number of layers is reported. The use of a metallic electrode, playing the role of both the conductive layer and the counter electrode, allows us to simplify the assembly of a commonly five-layer battery-type device to four-layer ECD. Further minimization of the number of layers is achieved using a conductive and electrochromic material. The novelty of the device configuration is illustrated using poly(3,4-ethylenedioxythiophene) (PEDOT)-based materials as EC layer, lithium-based ionic liquid as electrolyte, and Ag as counter electrode. Such a four- or three-layer ECD deposited on paper substrate switches from light to deep blue in a narrow 0.7 V voltage window. Preliminary investigations of the mechanism indicate traces of Ag on the PEDOT layer upon cycling. Finally, the printed ECD is successfully activated using a mobile phone.

Mots clés: Electrochromic Displays; Silver layer; PEDOT; Device Architecture; Optical modulation

Domaines: Matériaux

Abdelaadim Danine, Laura Manceriu, Cyril Faure, Christine Labrugère, Nicolas Penin, et al.. Toward simplified electrochromic devices using silver as counter electrode material. ACS Applied Materials & Interfaces, 2019, 11 (37), pp.34030-34038. ⟨10.1021/acsami.9b12380⟩. ⟨hal-02298374⟩