Conjugated polymer multilayer by in situ electrochemical polymerization for black-to-transmissive eletrochromism

Yan, Shuanma; Fu, Haichang; Zhang, Ling; Dong, Yujie; Li, Weijun; Ouyang, Mi; Zhang, Cheng

doi:10.1016/j.cej.2020.126819

Cited by 41 publications

(24 citation statements)

References 43 publications

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“…In comparison with the RGB system, the RGBY system is easier to realize the true black color, because the yellow-colored component adds the absorption of high energy light from 350 to 430 nm, which was lacking in the RGB system. Recently, our group [9] developed a more facile multilayer electrochemical polymerization (MEP) method to realize black-to-transmissive electrochromism from ECP multilayers based on three EDOT-based RGB colored-to-transmissive ECPs. By controlling the thickness of each polymer layers, the well neutral state black (a* ¼ 6.3, b* ¼ À8.2) is obtained for the "P1/P2/P3 Multilayer" (see Figure 6c).…”

Section: Color Mixing Of Additive Primary Colors (Rgb) For Black-to-transmissive Electrochromismmentioning

confidence: 99%

“…[8] Recently, our group developed new ECP multilayers with high-contrast black-to-transmissive electrochromism via a novel multilayer electrochemical polymerization (MEP) technique. [9] Furthermore, Yu et al discovered stable dark-to-transmissive electrochromism in a two-dimensional covalent organic framework (COF) based on the donor-acceptor approach. [10] These brilliant breakthroughs have promoted the development of black-totransmissive switching ECPs and ECDs and their applications.…”

Section: Introductionmentioning

confidence: 99%

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Black‐to‐Transmissive Electrochromism in π‐Conjugated Polymer‐Based Materials and Devices

Yan

Zhang

et al. 2021

Advanced Photonics Research

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Electrochromic (EC) materials can exhibit reversible changes in their light absorption properties within the entire electromagnetic spectrum via redox reactions induced by the application of a low voltage on the order of a fraction of a volt to a few volts, holding great potential in many commercial applications, including smart windows, rear‐view mirrors, protective eyewear, and electronic paper. Of all EC materials, black EC materials, especially those that can reversibly switch between black and transmissive states, have attracted considerable attention in the research field of electrochromism, because of their significant usefulness for a number of commercial applications especially in smart windows and displays, as well as the tremendous challenges in their preparations and improvements. In recent decades, numerous black EC materials and devices, including neutral‐state black to oxidized‐state transmissive (black‐to‐transmissive) and oxidized‐state transmissive to neutral‐state black (transmissive‐to‐black), have been created in studies. This review focuses on the development of black‐to‐transmissive electrochromism in π‐conjugated polymer‐based EC materials from the perspective of the realization methodology, containing the donor–acceptor approach and physical color mixing strategy. A conclusion and an outlook are presented to point out the challenges and perspectives for further study of black‐to‐transmissive electrochromism in π‐conjugated polymer‐based materials and devices.

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Section: Color Mixing Of Additive Primary Colors (Rgb) For Black-to-transmissive Electrochromismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Black‐to‐Transmissive Electrochromism in π‐Conjugated Polymer‐Based Materials and Devices

Yan

Zhang

et al. 2021

Advanced Photonics Research

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“…Compared with conventional supercapacitor electrode materials, like transition metal oxides, , conductive polymers have the advantages of flexible design, easy synthesis, low cost, and good conductivity. − Donor–acceptor–donor (D–A–D) building blocks as a kind of typical conjugated conductive polymer has been widely reported in the field of electrochromism because of its tunable band gap, − also studied in capacitance with fantastic attraction due to the wide potential range, such as exhibited by the involvement of a donor unit 3,4-ethylenedioxythiophene (EDOT). Recently, the applications of D–A–D type materials in ESCs have been studied.…”

Section: Introductionmentioning

confidence: 99%

New Donor–Acceptor–Donor Conjugated Polymer with Twisted Donor–Acceptor Configuration for High-Capacitance Electrochromic Supercapacitor Application

Huang

Chen

Yan

et al. 2021

ACS Sustainable Chem. Eng.

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A new donor−acceptor−donor monomer chalcogena-diazolobenzotriazole (CDB)−3,4-ethylenedioxythiophene (EDOT) is designed and synthesized with a torsion angle of 39°b etween the donor EDOT and acceptor CDB due to the existence of large steric hindrance between the EDOT and planar CDB structures. The corresponding conjugated polymer film pCDB− EDOT is prepared via electrochemical deposition on indium tin oxide-coated glass, and their electrochromic and capacitive properties are characterized. The polymer film displays a reversible switch from the green of the neutral state to the transparent gray of the oxidation state. Besides, the polymer pCDB−EDOT shows excellent capacitance, with an area specific capacitance of up to 4.65 mF cm −2 at 0.05 mA cm −1 . This is one of the highest area specific capacitance in D−A−D type conjugated materials reported so far. Moreover, the polymer film maintains excellent rate capability and high capacitive stability. The assembled electrochromic supercapacitor device can change the appearance color from dark green (no power) to blue (fully charged), accompanied by outstanding energy storage ability and good cycle stability, which could run a single yellow LED (1.8 V, 0.04 W) for more than 60 s. These results indicate the great potential of polymer pCDB− EDOT in the applications of energy-sustainable intelligent devices.

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“…Electrochromic (EC) materials have been widely studied and rapidly developed in past decades because of their potential applications in smart windows, − autodimming mirrors, − adaptive camouflage, − and electronic display devices. − Among numerous EC materials, organic conjugated polymers with excellent coloration efficiency, − high optical contrast, , fast switching time, − and color adjustment − have attracted a great deal of attention. For EC applications, the polymers are usually prepared as a uniform thin film on an indium tin oxide (ITO) electrode, generally by electropolymerization − or spray-/spin-coating methods. − A good electroactive site is an essential condition for electrochemical polymerization. , Spray-/spin coating must meet the requirements of complex chemical synthesis, good solubility, and the inability to construct cross-linked polymer structures. , Thus, development of new methods for preparing polymer films for electrochromic applications has been of great significance. , In particular, the development of a simple method to prepare novel conjugated polymer films for electrochromic applications that can be efficiently constructed under mild conditions using readily available precursors is preferred.…”

Section: Introductionmentioning

confidence: 99%

“…Electrochromic (EC) materials have been widely studied and rapidly developed in past decades because of their potential applications in smart windows, 1−5 autodimming mirrors, 6−8 adaptive camouflage, 9−15 and electronic display devices. 16−18 Among numerous EC materials, organic conjugated polymers with excellent coloration efficiency, 19−21 high optical contrast, 22,23 fast switching time, 24−26 and color adjustment 27−30 have attracted a great deal of attention. For EC applications, the polymers are usually prepared as a uniform thin film on an indium tin oxide (ITO) electrode, generally by electropolymerization 31−35 or spray-/spin-coating methods.…”

Section: Introductionmentioning

confidence: 99%

Liquid/Liquid Interfacial Suzuki Polymerization Prepared Novel Triphenylamine-Based Conjugated Polymer Films with Excellent Electrochromic Properties

Zhang

Wang

Dong

et al. 2021

ACS Appl. Mater. Interfaces

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Preparing conjugated polymer films via interfacial Suzuki polymerization is a promising method for obtaining desirable electrochromic materials with desired structures. Here, a series of aryl boronic esters and triphenylamine-based aryl bromides were applied as precursors, and several polymer films were finally obtained via the liquid/liquid interfacial Suzuki polymerization reaction under mild conditions. FT-IR, UV, and Raman as well as electrochemistry, SEM, and EDS results all provide strong evidence for the formation of the desired polymer structures. Among them, the TPA-Wu (containing triphenylamine and alkyl-fluorene) film exhibits the best film-forming quality. Besides, these polymer films were applied in electrochromic applications. The results show that electrochromic properties can be affected by the quality of film formation. It is worth mentioning that the TPA-Wu film could achieve excellent electrochromic properties with reversible multicolor changes from transparent yellow to orange-red to blue-green under varying potentials. Compared to other triphenylamine-based electrochromic materials, the TPA-Wu film possessed the most desirable coloring efficiency, higher optical contrast, and shorter switching time. This work provides an existing general approach of liquid/liquid interfacial Suzuki polymerization for constructing conjugated polymer films toward electrochromic applications.

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Conjugated polymer multilayer by in situ electrochemical polymerization for black-to-transmissive eletrochromism

Cited by 41 publications

References 43 publications

Black‐to‐Transmissive Electrochromism in π‐Conjugated Polymer‐Based Materials and Devices

Black‐to‐Transmissive Electrochromism in π‐Conjugated Polymer‐Based Materials and Devices

New Donor–Acceptor–Donor Conjugated Polymer with Twisted Donor–Acceptor Configuration for High-Capacitance Electrochromic Supercapacitor Application

Liquid/Liquid Interfacial Suzuki Polymerization Prepared Novel Triphenylamine-Based Conjugated Polymer Films with Excellent Electrochromic Properties

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