Preparation and analysis of electrochromic properties of poly(3,4 ethylene dioxythiophene)

Abstract

The film of PEDOT was prepared in this study via electrochemical polymerization using EDOT as monomer in LiClO4/PC solution. The effects on the properties of the film were surveyed including the deposition voltage and deposition time. The morphology of the film was observed by scanning electron microscopy. The electrochromic kinetics was analyzed by combination of electrochemical workstation and UV-Visible spectrophotometer such as the transmittance, transmittance contrast, coloring efficiency and the response time. The results indicated the film presents a coral shape despites of the deposition voltage and the deposition time. In case of the application as electrochromic film, the optimal process condition is 1.3 V and 24 s. The corresponding transmittance is 82.77% in fade state. The transmittance contrast is 17.87%, and the coloring efficiency is about 117.92 cm2/C, the response time is 0.52 s.

Conducting polymers: a comprehensive review on recent advances in synthesis, properties and applications

“…The second type of materials including polythiophenes have two colored states and the third class of materials have more than two colored states depending on their redox state. 102 Some conducting polymers like polyaniline 103 and poly(3,4-ethylene dioxythiophene) 104,105 are inherently multi-colored systems and have a wide variety of optoelectronic applications. The mechanism behind electrochromism is a change in pi-electron character with electrochemical oxidation or reduction.…”

Preparation and Characterization of Water-Insoluble Gardenia Blue Pigment

“…Some researchers studied the reaction mechanism of the hydrophobic gardenia blue pigment by its intermediates [ 10 , 11 , 12 , 13 ]. However, due to their high polymerization, the water-soluble and hydrophobic gardenia blue pigments have no exact structure and molecular weight [ 14 , 15 , 16 ].…”