Mimicking Nature's Butterflies: Electrochromic Devices with Dual‐Sided Differential Colorations

Chen, Jian; Wang, Zhen; Liu, Chenglong; Chen, Zhigang; Tang, Xueqing; Wu, Qi; Zhang, Shu; Song, Ge; Cong, Shan; Chen, Qin; Zhao, Zhigang

doi:10.1002/adma.202007314

Cited by 70 publications

(76 citation statements)

References 35 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This simulator solves the optical transmittance and reflectance spectra on thin-film system, which was based on the complex-matrix of the Fresnel equations. [69] For the incident light, TE and TM waves across the interface from the i layer to the j layer can be represented by the refraction matrix M ij . Phase matrix U i represents light propagation through the i layer at thickness d. M ij , and U i can be represented by Equation (7) in the following…”

Section: Methodsmentioning

confidence: 99%

Bioinspired Dynamically Switchable PANI/PS‐b‐P2VP Thin Films for Multicolored Electrochromic Displays with Long‐Term Durability

Zhang

Wang

Tong

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Electrochromism has attracted wide attention as futuristic adaptive camouflage technologies due to its reversible and sustainable optical modulation with low energy consumption. However, limited color control of the electrochromic materials has hampered its applications. Inspired by the remarkable dynamic camouflage capabilities of cephalopods, polyaniline (PANI) and polystyrene-block-poly (2-vinyl pyridine) (PS-b-P2VP) thin films are integrated to simulate chromatophores and iridophores in the skin of cephalopods, respectively. Herein, it is demonstrated that the adaptive lamellar PANI/PS-b-P2VP thin film exhibits a wide range of color control, switchable vivid coloration, and excellent durability. It serves as an ideal multicolored electrochromic platform due to the combined effect of electrochromism from PANI and structural coloration from PS-b-P2VP. Unambiguous evidence shows that optical properties of the PANI/PS-b-P2VP thin film are related to the thickness of each layer and nanostructure of PANI, pronounced color changes mainly depend on electronic states of PANI and transition of hydrated SO 4 2− ions between PANI and P2VP. The coloration mechanism is discussed using quantitative analysis via RGB color specification and optical transmittance and reflectance simulations. The new insights will advance the design of reflectioncontributed superior multicolored electrochromic materials, and have great potential in the fields of displays and camouflage.

show abstract

Section: Methodsmentioning

confidence: 99%

Bioinspired Dynamically Switchable PANI/PS‐b‐P2VP Thin Films for Multicolored Electrochromic Displays with Long‐Term Durability

Zhang

Wang

Tong

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…also observed that the electro‐induced color changes on one side of the device were different from the other side, through the abnormal phase shift of the reflected light of W, Ti, Cu, Ag, and other composite refractive index devices. [ 93 ]…”

Section: Design and Improvement Of Advanced Ions‐based Electrochromic...mentioning

confidence: 99%

Electrochromic Materials Based on Ions Insertion and Extraction

Huang

Wang

Chen

et al. 2021

Advanced Optical Materials

View full text Add to dashboard Cite

Reducing energy consumption is one of the major concerns in modern building design and construction because buildings account for ≈40% of the total energy consumption in modern society. Among various technologies for saving energy, electrochromic smart windows are considered as a highly promising one. Except for the application in saving energy, electrochromism has also attracted extensive attention in many other fields, such as, anti‐glare rearview mirrors, displays, military camouflage, flexible wearable fabric, etc. However, there are still many challenges needed to be solved, such as, the response rate and durability of electrochromic materials (ECMs). The transmission rate of ions in ECMs determines the response rate of the whole electrochromic device. Besides, the embedding depth and total amount of ions directly affect the contrast, durability, and coloration efficiency of ECMs. It is crucial to select suitable electrolyte ions to obtain high‐efficiency ECMs. Here, the challenges in ECMs based on ions insertion/extraction are presented, which are focused on advanced nanostructured ECMs’ design and electrochromic devices’ practical application. Recent advances in ECMs are presented to discuss the important questions, which are especially focused on the connection between suitable ions and advanced nanostructural ECMs. Finally, a perspective for next‐generation electrochromic devices is presented.

show abstract

“…Electrochromism is an intriguing phenomenon by which electrochemical oxidation and reduction induce a reversible color change in material. [ 1,2 ] This compelling light control technology endows a variety of applications, including electronic skins, [ 3,4 ] displays, [ 5–8 ] autodimming rearview mirrors, [ 9 ] and smart windows. [ 10–13 ] Such platforms can retain their colored or bleached states in an open‐circuit configuration (i.e., zero energy consumption) for most inorganic electrochromic materials or some modified organic electrochromic materials, [ 14–18 ] requiring only the application of a small external voltage to trigger the bistable coloration and decoloration states.…”

Section: Introductionmentioning

confidence: 99%

Emerging Zn Anode‐Based Electrochromic Devices

Zhang

et al. 2021

Small Science

View full text Add to dashboard Cite

The development of electrochromic materials has opened the door to the development of numerous devices including smart windows, color displays, optical filters, wearable camouflages, among others. Although the current electrochromic devices do not consume energy while maintaining their colored or colorless states, their bistable operation requires external electrical energy to be consumed during switching. To reduce the energy consumption of an electrochromic device, an emerging Zn anode‐based electrochromic device concept was recently introduced to partially retrieve the consumed electrical energy. In this Review, key technological developments and scientific challenges are presented for a broad range of Zn anode‐based electrochromic device configurations with emphasis on the inherent distinctions between the Zn anode‐based and conventional electrochromic devices. Specifically, a comprehensive comparison of the two classes of electrochromic devices in the high‐performance device design is provided. For the electrochromic layer, the methods for obtaining high‐quality electrochromic materials and thin films are reviewed. For the electrolytes, the effect of the dual ion system on the electrochromic performance is discussed. Also, some critical but unresolved issues in the device design and fabrication are discussed. The perspectives and outlook at the end of this Review provide recommendations to improve performance for future electrochromic studies.

show abstract

Mimicking Nature's Butterflies: Electrochromic Devices with Dual‐Sided Differential Colorations

Cited by 70 publications

References 35 publications

Bioinspired Dynamically Switchable PANI/PS‐b‐P2VP Thin Films for Multicolored Electrochromic Displays with Long‐Term Durability

Bioinspired Dynamically Switchable PANI/PS‐b‐P2VP Thin Films for Multicolored Electrochromic Displays with Long‐Term Durability

Electrochromic Materials Based on Ions Insertion and Extraction

Emerging Zn Anode‐Based Electrochromic Devices

Contact Info

Product

Resources

About