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Open AccessArticle

Dithienylpyrrole- and Tris[4-(2-thienyl)phenyl]amine-Containing Copolymers as Promising Anodic Layers in High-Contrast Electrochromic Devices

Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan
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Author to whom correspondence should be addressed.
Coatings 2018, 8(5), 164; https://doi.org/10.3390/coatings8050164
Received: 22 March 2018 / Revised: 13 April 2018 / Accepted: 20 April 2018 / Published: 27 April 2018
(This article belongs to the Special Issue Thin Films for Advance Applications)
Three dithienylpyrrole- and tris[4-(2-thienyl)phenyl]amine-containing copolymers (P(MPS-co-TTPA), P(MPO-co-TTPA), and P(ANIL-co-TTPA)) were deposited on indium tin oxide (ITO) surfaces using electrochemical polymerization. Spectroelectrochemical characterizations of polymer films revealed that P(MPS-co-TTPA) film was light olive green, greyish-green, bluish grey, and grey in neutral state, intermediate state, oxidized state, and highly oxidized state, respectively, whereas P(MPO-co-TTPA) film was green moss, foliage green, dark greyish-green, and bluish-grey in neutral state, intermediate state, oxidized state, and highly oxidized state, respectively. The ΔTmax of P(MPS-co-TTPA) film at 964 nm, P(MPO-co-TTPA) film at 914 nm, and P(ANIL-co-TTPA) film at 960 nm were 67.2%, 60.7%, and 67.1%, respectively, and the coloration efficiency (η) of P(MPS-co-TTPA) film at 964 nm, P(MPO-co-TTPA) film at 914 nm, and P(ANIL-co-TTPA) film at 960 nm were calculated to be 260.3, 176.6, and 230.8 cm2 C−1, respectively. Dual type complementary colored electrochromic devices (ECDs) were constructed using P(MPS-co-TTPA), P(MPO-co-TTPA), or P(ANIL-co-TTPA) as anodic copolymer layer and PProDOT-Et2 as cathodic polymer layer. P(MPO-co-TTPA)/PProDOT-Et2 ECD revealed high ΔT (55.1%) and high η (766.5 cm2 C−1) at 580 nm. Moreover, P(MPS-co-TTPA)/PProDOT-Et2, P(MPO-co-TTPA)/PProDOT-Et2, and P(ANIL-co-TTPA)/PProDOT-Et2 ECDs showed satisfactory long-term cycling stability and optical memory. View Full-Text
Keywords: electrochemical polymerization; spectroelectrochemistry; electrochromic switching; optical contrast; electrochromic devices electrochemical polymerization; spectroelectrochemistry; electrochromic switching; optical contrast; electrochromic devices
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MDPI and ACS Style

Wu, T.-Y.; Su, Y.-S.; Chang, J.-C. Dithienylpyrrole- and Tris[4-(2-thienyl)phenyl]amine-Containing Copolymers as Promising Anodic Layers in High-Contrast Electrochromic Devices. Coatings 2018, 8, 164. https://doi.org/10.3390/coatings8050164

AMA Style

Wu T-Y, Su Y-S, Chang J-C. Dithienylpyrrole- and Tris[4-(2-thienyl)phenyl]amine-Containing Copolymers as Promising Anodic Layers in High-Contrast Electrochromic Devices. Coatings. 2018; 8(5):164. https://doi.org/10.3390/coatings8050164

Chicago/Turabian Style

Wu, Tzi-Yi; Su, Yuh-Shan; Chang, Jui-Cheng. 2018. "Dithienylpyrrole- and Tris[4-(2-thienyl)phenyl]amine-Containing Copolymers as Promising Anodic Layers in High-Contrast Electrochromic Devices" Coatings 8, no. 5: 164. https://doi.org/10.3390/coatings8050164

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