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Applications of Tris(4-(thiophen-2-yl)phenyl)amine- And Dithienylpyrrole-based Conjugated Copolymers in High-Contrast Electrochromic Devices

Applications of Tris(4-(thiophen-2-yl)phenyl)amine- And Dithienylpyrrole-based Conjugated Copolymers in High-Contrast Electrochromic Devices

Tzi-Yi Wu, Hsin-Hua Chung

Polymers (Basel). 2016 May 27;8(6):206.

PMID: 30979303

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP883236542	Tris[4-(5-dicyanomethylidenemethyl-2-thienyl)phenyl]amine		883236-54-2	Price

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