Abstract
Tris(4-(thiophen-2-yl)phenyl)amine- and dithienylpyrrole-based copolymers (P(TTPA-co-DIT) and P(TTPA-co-BDTA)) were electropolymerized on ITO electrode by applying constant potentials of 1.0, 1.1, and 1.2 V. Spectroelectrochemical investigations revealed that P(TTPA-co-DIT) film displayed more color changes than P(TTPA-co-BDTA) film. The P(TTPA-co-DIT) film is yellow in the neutral state, yellowish-green and green in the intermediate state, and blue (1.2 V) in highly oxidized state. The ∆Tmax of the P(TTPA-co-DIT) and P(TTPA-co-BDTA) films were measured as 60.3% at 1042 nm and 47.1% at 1096 nm, respectively, and the maximum coloration efficiency (η) of P(TTPA-co-DIT) and P(TTPA-co-BDTA) films were calculated to be 181.9 cm2·C−1 at 1042 nm and 217.8 cm2·C−1 at 1096 nm, respectively, in an ionic liquid solution. Dual type electrochromic devices (ECDs) consisting of P(TTPA-co-DIT) (or P(TTPA-co-BDTA)) anodic copolymer, ionic liquid-based electrolyte, and poly(3,4-(2,2-diethylpropylenedioxy)thiophene) (PProDOT-Et2) cathodic polymer were constructed. P(TTPA-co-BDTA)/PProDOT-Et2 ECD showed high ΔTmax (48.1%) and high coloration efficiency (649.4 cm2·C−1) at 588 nm. Moreover, P(TTPA-co-DIT)/PProDOT-Et2 and P(TTPA-co-BDTA)/PProDOT-Et2 ECDs displayed satisfactory optical memory and long term switching stability.
Highlights
Functional conjugated polymers (CPs) have attracted an increasing attention due to their potentials for unique optical and electrochemical properties, multiple color exhibitions, and high optical contrast ability
Hsiao et al reported that triphenylaime-containing polyamides displayed good electrochemical stability and multicolor electrochromic behaviors upon applying potentials [22], the percent transmittance change and coloration efficiency of triphenylamine-containing polyamides are 58% and 209 cm2 ̈ C 1 at 929 nm, Polymers 2016, 8, 206; doi:10.3390/polym8060206
Polymers 2016, 8, 206 respectively. Polythiophenes and their derivatives are promising organic CPs for commercial electrochromic applications due to their potential to combine with other electrochromic materials to display multichromic behaviors
Summary
Functional conjugated polymers (CPs) have attracted an increasing attention due to their potentials for unique optical and electrochemical properties, multiple color exhibitions, and high optical contrast ability. Hsiao et al reported that triphenylaime-containing polyamides displayed good electrochemical stability and multicolor electrochromic behaviors upon applying potentials [22], the percent transmittance change and coloration efficiency of triphenylamine-containing polyamides are 58% and 209 cm2 ̈ C 1 at 929 nm, Polymers 2016, 8, 206; doi:10.3390/polym8060206 www.mdpi.com/journal/polymers. Polythiophenes and their derivatives are promising organic CPs for commercial electrochromic applications due to their potential to combine with other electrochromic materials to display multichromic behaviors. 1.5 V vs Ag/AgCl) [23], the attachment of alkyl and alkoxy groups to polythiophenes gives rise to good solubility and processability of the polymer in general solvents. The incorporation of electron donating substituents to the 3- and
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
