Conjugated polymer-based electrochromics: materials, device fabrication and application prospects

Neo, Wei Teng; Ye, Qun; Chua, Soo-Jin; Xu, Jianwei

doi:10.1039/c6tc01150k

Cited by 193 publications

(121 citation statements)

References 145 publications

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“…[3,[8][9][10][11] Conjugated EC polymers (ECPs), such as poly(3,4-ethylene dioxythiophene) (PEDOT), are generally compatible with high-throughput processes, e.g., roll-to-roll (R2R) deposition. Conjugated polymers are one of the main classes of materials that exhibit EC properties as thin films.…”

mentioning

confidence: 99%

New Roll‐to‐Roll Processable PEDOT‐Based Polymer with Colorless Bleached State for Flexible Electrochromic Devices

Macher

Schott

Sassi

et al. 2019

Adv Funct Materials

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Conjugated electrochromic (EC) polymers for flexible EC devices (ECDs) generally lack a fully colorless bleached state. A strategy to overcome this drawback is the implementation of a new sidechain-modified poly(3,4-ethylene dioxythiophene) derivative that can be deposited in thin-film form in a customized high-throughput and large-area roll-to-roll polymerization process. The sidechain modification provides enhanced EC properties interms of visible light transmittance change, Δτ v = 59% (ΔL* = 54.1), contrast ratio (CR = 15.8), coloration efficiency (η = 530 cm² C −1 ), and color neutrality (L* = 83.8, a* = −4.3, b* = −4.1) in the bleached state. The intense bluecolored polymer thin films exhibit high cycle stability (10 000 cycles) and fast response times. The design, synthesis, and polymerization of the modified 3,4-ethylene dioxythiophene derivative are discussed along with a detailed optical, electrochemical, and spectroelectrochemical characterization of the resulting EC thin films. Finally, a flexible see-through ECD with a visible light transmittance change of Δτ v = 47% (ΔL* = 51.9) and a neutral-colored bleached state is developed.

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mentioning

confidence: 99%

New Roll‐to‐Roll Processable PEDOT‐Based Polymer with Colorless Bleached State for Flexible Electrochromic Devices

Macher

Schott

Sassi

et al. 2019

Adv Funct Materials

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“…[19,[279][280][281] An electrochromic (EC) cell typically consists of a thin film of the optically active material on a transparent working electrode, an electrolyte (with mobile anions and cations) and a counter electrode. The employed materials range from inorganic oxides (e.g., tungsten trioxide) and Prussian blue to redox-active molecules (e.g., viologens) and conjugated polymers with a spectral scope from the ultraviolet to the near-infrared (nIR).…”

Section: Electrochromic Cellsmentioning

confidence: 99%

“…[19,273,280] The observed change of color is a result of the ground state bleaching and redshifted (typically in the near-infrared) polaron absorption of the positively or negatively charged polymer (see Section 3.1). [19,273,280] The observed change of color is a result of the ground state bleaching and redshifted (typically in the near-infrared) polaron absorption of the positively or negatively charged polymer (see Section 3.1).…”

Section: Electrochromic Cellsmentioning

confidence: 99%

Semiconducting Single‐Walled Carbon Nanotubes or Very Rigid Conjugated Polymers: A Comparison

Zaumseil

2018

Adv Elect Materials

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With the ability to produce large amounts of purely semiconducting and even monochiral dispersions of single-walled carbon nanotubes (SWCNT) their application as a bulk material in thin film devices on a large scale becomes feasible. Their physical properties, processing, and final devices are quite similar to those of semiconducting polymers. In the extreme case one may view carbon nanotubes as very long, rigid, and fully conjugated polymers. This analogy raises the question whether the knowledge accumulated over the last two decades of processing and studying conjugated polymers could be transferred to solution-processed nanotube devices. Here, the optical and electronic properties of both materials in solution and in thin films are discussed and compared with a focus on their application in optoelectronic devices. Some striking similarities and common issues are highlighted to show the connection between conjugated polymers and SWCNTs as 1D semiconductors.

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“…[1,2] These polymermodified electrodes are used for various electrochemical applications based on the unique properties of the immobilized polymer layers. Electrodes coated with conducting polymers based on p-conjugated chains are explored as supercapacitors, [7] electrochromic devices [8] and electrochemical sensors. [3] Thin films of unconjugated redox homopolymers are used as redox mediators for electrochemical enzyme sensors [4] and as electrocatalysts [5,6] on the basis of their charge propagation capability at a desired potential.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Applications of Microphase‐Separated Block Copolymer Thin Films

Ito

Ghimire

2018

ChemElectroChem

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In this review, we discuss electrochemical applications of electrode-supported thin films derived from microphase-separated block copolymers (BCPs). In contrast to conventional homopolymers used for electrode modification, BCPs afford periodic nanoscale structures (microdomains) of uniform dimensions (5-100 nm) and predictable morphologies, which can be controlled by adjusting the lengths of individual homopolymer segments. BCPs usable for electrochemical applications consist of two or more segments that form solute-permeable, redox-active or etchable microdomains and a chemically inert matrix. The resulting microdomains afford nanoscale molecular/charge transport pathways toward the underlying electrode, whereas the matrix serves as a scaffold to improve film stability in solution. These polymeric thin films provide a unique means for fabricating nanowire arrays via template-based electrochemical synthesis, designing electrochemical sensors with unique selectivity, and constructing electrochemically-tunable functional materials.[a] Prof.

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Conjugated polymer-based electrochromics: materials, device fabrication and application prospects

Abstract: The recent developments and trends of electrochromic conjugated polymers and their devices are highlighted in this review.

Cited by 193 publications

References 145 publications

New Roll‐to‐Roll Processable PEDOT‐Based Polymer with Colorless Bleached State for Flexible Electrochromic Devices

New Roll‐to‐Roll Processable PEDOT‐Based Polymer with Colorless Bleached State for Flexible Electrochromic Devices

Semiconducting Single‐Walled Carbon Nanotubes or Very Rigid Conjugated Polymers: A Comparison

Electrochemical Applications of Microphase‐Separated Block Copolymer Thin Films

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