Solution-processable low-bandgap 3-fluorothieno-[3,4-b]thiophene-2-carboxylate-based conjugated polymers for electrochromic applications

被引：9

作者：

Shi, Zugui ^{[1
]}

Neo, Wei Teng ^{[1
,2
]}

Lin, Ting Ting ^{[1
]}

Zhou, Hui ^{[1
]}

Xu, Jianwei ^{[1
,3
]}

机构：

[1] ASTAR, Inst Mat Res & Engn, Innovis, Singapore 138634, Singapore

[2] Natl Univ Singapore, NUS Grad Sch Integrat Sci & Engn, Singapore 117456, Singapore

[3] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

RSC ADVANCES | 2015年 / 5卷 / 117期

关键词：

DONOR-ACCEPTOR COPOLYMERS; SOLAR-CELLS; FLUORINATED BENZOTHIADIAZOLE; ELECTRONIC-PROPERTIES; OPTICAL-PROPERTIES; COMPOSITE FILM; PERFORMANCE; BENZOTRIAZOLE; NANOPARTICLES; DERIVATIVES;

D O I：

10.1039/c5ra19956e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, a series of low-bandgap donor-acceptor (D-A) conjugated polymers with 3-fluorothieno [3,4-b] thiophene-2-carboxylate (FTT) as an acceptor and ethylenedioxythiophene (EDOT) (P1), acyclic dioxythiophene (AcDOT) (P2) or propylenedioxythiophene (ProDOT) (P3) as donors were synthesized via Stille polymerization. The resultant polymers have good solubility in organic solvents. The polymers were characterized by gel permeation chromatography (GPC), nuclear magnetic resonance spectroscopy (NMR) and thermogravimetric analysis (TGA). Their electrochemical, morphological and electrochromic (EC) properties were investigated, and their absorption-transmission type electrochromic devices (ECDs) were fabricated and characterized. In their neutral states, the polymers displayed deep magenta (P1) to blue (P2, P3) hues, and upon electrochemical oxidation, they revealed grey tones with good optical contrasts (19-37 and 57-58% in visible and near-infrared (NIR) regions, respectively), good coloration efficiencies (158-380 and 279-378 cm(2) C-1 for visible and NIR regions, respectively) and reasonable redox stability (retaining 64-80% original optical contrast after 1000 cycles) under ambient conditions and without any encapsulation of the ECDs.

引用

页码：96328 / 96335

页数：8

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