Journal
MEMBRANES
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/membranes11020125
Keywords
electrochromic behavior; spectroelectrochemical property; transmittance; dual-type electrochromic device; cycling stability
Categories
Funding
- Ministry of Science and Technology of Republic of China [109-2221-E-992-006, 108-2221-E-224-049-MY3]
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In this study, five carbazole-containing polymeric membranes were examined, with P(DTC-co-BTP2) showing high Delta T at 855 nm, and P(DTC-co-TF2) displaying multiple colors in different reduced and oxidized states. Assembling polymer-based organic electrochromic devices allowed for high transmittance change and rapid switching time, demonstrating satisfactory optical memory and high coloration efficiency.
Five carbazole-containing polymeric membranes (PDTC, P(DTC-co-BTP), P(DTC-co-BTP2), P(DTC-co-TF), and P(DTC-co-TF2)) were electrodeposited on transparent conductive electrodes. P(DTC-co-BTP2) shows a high Delta T (68.4%) at 855 nm. The multichromic properties of P(DTC-co-TF2) membrane range between dark yellow, yellowish-green, gunmetal gray, and dark gray in various reduced and oxidized states. Polymer-based organic electrochromic devices are assembled using 2,2'-bithiophene- and 2-(2-thienyl)furan-based copolymers as anodic membranes, and poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) (PEDOT-PSS) as the cathodic membrane. P(DTC-co-TF)/PEDOT-PSS electrochromic device (ECD) displays a high transmittance change (Delta T%) (43.4%) at 627 nm as well as a rapid switching time (less than 0.6 s) from a colored to a bleached state. Moreover, P(DTC-co-TF2)/PEDOT-PSS ECD shows satisfactory optical memory (the transmittance change is less than 2.9% in the colored state) and high coloration efficiency (512.6 cm(2) C-1) at 627 nm.
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