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A Transparent to Opaque Electrochromic Device Using Reversible Ag Deposition on PProDOT‐Me 2 with Robust Stability
Author(s) -
Sheng Kai,
Xue Bin,
Zheng Jianming,
Xu Chunye
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202002149
Subject(s) - electrochromism , materials science , opacity , transmittance , electrochromic devices , electrolyte , optoelectronics , electrode , indium tin oxide , indium , nanotechnology , optics , thin film , chemistry , physics
A hybrid device integrating both electrochromic (EC) and metal electrodepositing effects is developed. The device consists of a working electrode made with poly(3,4‐(2,2‐dimethyl‐propylenedioxy)thiophene) (PProDOT‐Me 2 ), a counter electrode of bare indium tin oxide, and an electrolyte containing AgNO 3 , LiBr, and Br 2 . The electrolyte is specially designed to provide essential elements for both EC and electrodepositing reactions. By applying varying voltages, the device demonstrates three color states: transparent, blue, and opaque. Detailed measurements reveal that the device displays near‐zero transmittance in the opaque state and can work over 10 000 cycles, with 75.7% as the maximum optical modulation and about 5 s as its response time for both coloring and bleaching processes. This study may provide a way to break the limitation of conventional electrochromic devices (ECDs).