Effects of Supporting Electrolytes on Spectroelectrochemical and Electrochromic Properties of Polyaniline‐poly(styrene sulfonic acid) and Poly(ethylenedioxythiophene)‐poly(styrene sulfonic acid)‐based Electrochromic Device |
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| Authors: | Chung‐Wen Kuo Bor‐Kuan Chen Wen‐Bin Li Lan‐Yu Tseng Tzi‐Yi Wu Ching‐Guey Tseng Ho‐Rei Chen Yu‐Chang Huang |
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| Affiliation: | 1. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan;2. Department of Materials Engineering, Kun Shan University, Tainan 71003, Taiwan;3. Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan |
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| Abstract: | Electrochromic devices are fabricated by using polyaniline (PANI) doped with poly(styrene sulfonic acid) (PSS) as coloring electrodes, poly(ethylenedioxythiophene)‐poly(styrene sulfonic acid) (PEDOT‐PSS) as complementary electrodes, and hybrid polymer electrolytes as gel electrolytes. The device based on LiClO4‐based electrolyte (weight ratio of PMMA:PC:LiClO4 = 0.7:1.1:0.3) shows the highest optical contrast and coloration efficiency (333 cm2/C) after 1200 cycles in these devices, and the color changes from pale yellow (?0.5 V) to dark blue (+2.5 V). The spectroelectrochemical and electrochromic switching properties of electrochromic devices are investigated, the maximum optical contrast (ΔT%) of electrochromic device for ITO|PANI‐PSS‖PMMA‐PC‐LiClO4‐SiO2‖PEDOT‐PSS|ITO are 31.5% at 640 nm, and electrochromic device based on LiClO4‐based electrolyte with SiO2 shows faster response time than that based on LiClO4‐based electrolyte without SiO2. |
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| Keywords: | Gel electrolyte Polyaniline Poly(styrene sulfonic acid) Electrochromic device Spectroelectrochemistry Coloration efficiency |
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