Review on Variable Emissivity Materials and Devices Based on Smart Chromism

Lang, Fengpei; Wang, Hao; Zhang, Shengjun; Liu, Jingbing; Yan, Hui

doi:10.1007/s10765-017-2329-0

Cited by 74 publications

(28 citation statements)

References 117 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Soft, mechanically deformable systems that can reversibly change their appearance (e.g., coloration, opacity, or luminescence) within the visible range of the electromagnetic spectrum have attracted much research interest for applications that include smart windows,1,2 colorimetric sensors,3,4 optoelectronic displays,5,6 artificial skin,7,8 and bioinspired robotics 9,10. More recently, the emergence of analogous platforms that dynamically modulate the propagation of IR radiation (i.e., heat) has facilitated exciting proof‐of‐principle demonstrations in areas such as energy conservation,11,12 thermal management,13,14 and IR camouflage 15,16. Within this context, devices or systems that can potentially manipulate light across both the visible (400–740 nm) and IR (740 nm to 15 µm) spectral regions remain quite rare.…”

Section: Figurementioning

confidence: 99%

Stretchable Cephalopod‐Inspired Multimodal Camouflage Systems

Escobar

Gorodetsky

2020

Advanced Materials

View full text Add to dashboard Cite

robotics. [9,10] More recently, the emergence of analogous platforms that dynamically modulate the propagation of IR radiation (i.e., heat) has facilitated exciting proof-of-principle demonstrations in areas such as energy conservation, [11,12] thermal management, [13,14] and IR camouflage. [15,16] Within this context, devices or systems that can potentially manipulate light across both the visible (400-740 nm) and IR (740 nm to 15 µm) spectral regions remain quite rare. To date, relatively few classes of these technologies have been reported, such as thermochromic phase-change materials, [17][18][19][20] electrochromic devices, [21][22][23] IR-reflecting platforms, [24,25] and reconfigurable soft machines [9] (see Table S1, Supporting Information), and they have featured drawbacks that include a limited degree of spectral modulation, impractical actuation requirements, poor stability to repeated actuation, slow response times, and/or complicated fabrication. [9,[17][18][19][20][21][22][23][24][25] Indeed, the engineering of devices and systems with tandem adaptive functionality across a broad spectral window (i.e., encompassing the visible, near-IR, short-wavelength IR, mid-wavelength IR, and long-wavelength IR) has proven challenging, in part because of the order of magnitude difference in the length scales associated with the propagation of visible and long-wavelength IR light. Consequently, there exists an impetus for the development of advanced multimodal camouflage platforms, which can present new scientific and technological opportunities across multiple fields.Some of the most prominent and impressive examples of soft, deformable systems that can reversibly and precisely change their appearance are found in nature-they are animals called coleoid cephalopods, [26][27][28][29][30][31][32] such as the Japetella heathi pelagic octopus (Figure 1A) [28] and the Taonius borealis glass squid ( Figure 1B). [29,30] These animals are capable of stunning feats of concealment, which include changing the transparency of their bodies by means of a sophisticated skin architecture that controls the transmission, absorption, and reflection of light ( Figure 1C). [26][27][28][29][30][31][32] In its most general form, the skin consists of multiple layers containing pigmented sizechanging organs called chromatophores, [33][34][35] typically narrowband-reflecting cells called iridophores, [36][37][38] and broadbandreflecting cells called leucophores [39][40][41] (Figure 1C). Although their precise arrangement and optical functionalities tend to Soft, mechanically deformable materials and systems that can, on demand, manipulate light propagation within both the visible and infrared (IR) regions of the electromagnetic spectrum are desirable for applications that include sensing, optoelectronics, robotics, energy conservation, and thermal management. However, the development of such technologies remains exceptionally difficult, with relatively few examples reported to date. Herein, this challenge is addressed by engineering ceph...

show abstract

Section: Figurementioning

confidence: 99%

Stretchable Cephalopod‐Inspired Multimodal Camouflage Systems

Escobar

Gorodetsky

2020

Advanced Materials

View full text Add to dashboard Cite

show abstract

“…对于大部分电致变色材料来说，其颜色只是对可见光到近红外波段有响应，因此，电致变色器件主要应用于智能窗、防眩目后视镜、动态显示等方面 [16,[74][75] 。近些年，随着研究的不断深入，人们发现部分电致变色材料对中红外也可以进行调控，这一性能使电致变色器件在红外伪装及辐射冷却/热管理方面具有极高的应用价值 [76][77][78] 。用于红外调控的电致变色材料主要有氧化钨 [79][80] 、聚苯胺 [81][82] 、聚噻吩 [78,83] 等。Demiryont 等 [28] 设计了一种全无机固态电致变色器件 (Eclipse [83][84][85] ，其中，哈尔滨工业大学的李垚团队 [27,82,[86][87][88] 在该领域开展了大量工作。他们 [71] [88] 。 Li 等 [89] 研究了硫酸掺杂 PANI 的红外电致变色性能，器件采用"扩散控制"双电极结构，在 8~12 μm 范围内，器件的平均发射率变化约为 0.24，同时，还能实现绿色到黄色的色彩变化。Brooke 等 [78] 采用聚 (3,4-乙烯二氧噻吩 ) ：甲苯磺酸盐 (Poly(3,4-ethylenedioxythiophene): Tosylate, PEDOT: Tosylate)同时作为电致变色层和电极，制备了横向和垂直结构的柔性红外电致变色器件(图 5(c))，横向结构器件在±1.5 V 电压下，有效温度变化达到 10 ℃，垂直结构器件 (7×7 cm 2 ) 的有效温度变化大约为 7 ℃，且具有较快的转换时间(氧化态到还原态 1.9 s，恢复到氧化态 3.3 s)和较好的光学记忆效果(至少 10 h)。图 5 基于 Li4Ti5O12(a) [77] 、基于 PANI(b) [71] 和基于 PEDOT: Tosylate(c) [78] 的红外电致变色器件及相关性能 Fig. 5 Li4Ti5O12-based [77] (a), PANI-based [71] , (b) and PEDOT: Tosylate-based (c) [78] infrared ECD and corresponding performances 2.2 电致变色储能电致变色器件与超级电容器及电池具有相似的器件结构、活性材料类型和电化学反应原理，因此，利用单一材料和器件，将电致变色与能量存储两种功能进行集成成为可能，实现了在变色能过程中能量的回收，进一步减少了电致变色的实际能量消耗，同时可以利用颜色的变化来直观动态地显示储能器件的剩余容量 [90][91][92][93] 。自 2002 年开始，逐渐有研究人员将电致变色功能集成在超级电容器上 [30,[94][95]…”

Section: 电致变色红外调控unclassified

Multi-functional Electrochromic Devices: Integration Strategies Based on Multiple and Single Devices

Fan¹,

Li²,

Hou³

et al. 2021

Journal of Inorganic Materials

View full text Add to dashboard Cite

“…Transmissive to black electrochromism, involving two most sterling of colourations, has long stood out as the ultimate exploit of this redox driven phenomenon, holding promise for developing low-cost, low energy demand passive display, or light modulation technology. References to this topic can be found in a number of reviews [ 1 , 2 , 3 , 4 ], but no broader address of the subject has yet been made. With the advent of commercial demand for such systems, one example being the e-paper technology, the subject is garnering the dedicated attention of material scientists, making it prudent to summarise existing developments and provide organisational structure for future research developments.…”

Section: Concepts and Considerationsmentioning

confidence: 99%

Transparent to Black Electrochromism—The “Holy Grail” of Organic Optoelectronics

2019

View full text Add to dashboard Cite

In the rapidly developing field of conjugated polymer science, the attribute of electrochromism these materials exhibit provides for a multitude of innovative application opportunities. Featuring low electric potential driven colour change, complemented by favourable mechanical and processing properties, an array of non-emissive electrochromic device (ECD) applications lays open ahead of them. Building up from the simplest two-colour cell, multielectrochromic arrangements are being devised, taking advantage of new electrochromic materials emerging at a fast pace. The ultimate device goal encompasses full control over the intensity and spectrum of passing light, including the two extremes of complete and null transmittance. With numerous electrochromic device architectures being explored and their operating parameters constantly ameliorated to pursue this target, a summary and overview of developments in the field is presented. Discussing the attributes of reported electrochromic systems, key research points and challenges are identified, providing an outlook for this exciting topic of polymer material science.

show abstract

Review on Variable Emissivity Materials and Devices Based on Smart Chromism

Cited by 74 publications

References 117 publications

Stretchable Cephalopod‐Inspired Multimodal Camouflage Systems

Stretchable Cephalopod‐Inspired Multimodal Camouflage Systems

Multi-functional Electrochromic Devices: Integration Strategies Based on Multiple and Single Devices

Transparent to Black Electrochromism—The “Holy Grail” of Organic Optoelectronics

Contact Info

Product

Resources

About