Stretchable electrochromic devices enabled via shape memory alloy composites (SMAC) for dynamic camouflage

Zhao, Pengfei; Chen, Hualing; Li, Bo; Tian, Hongmiao; Lai, Dengshui; Gao, Yang

doi:10.1016/j.optmat.2019.06.005

Cited by 27 publications

(25 citation statements)

References 51 publications

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“…showed large color changing area in the visible light range with photonic crystal prepared by nano-imprinting on PDMS. It indicated the potential for applications of camouflage functional devices 6 . Liu et al presented a sandwiched tungsten trioxide/silver nanotrough network/PEDOT:PSS multi-layer transparent electrode with excellent conductivity and transparency 7 .…”

Section: Introductionmentioning

confidence: 97%

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Kim

Park

et al. 2020

Sci Rep

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Stretchable materials are essential for next generation wearable and stretchable electronic devices. Intrinsically stretchable and highly conductive polymers (termed ISHCP) are designed with semi interpenetrating polymer networks (semi-IPN) that enable polymers to be simultaneously applied to transparent electrodes and electrochromic materials. Through a facile method of acid-catalyzed polymer condensation reaction, optimized ISHCP films show the highest electrical conductivity, 1406 S/cm, at a 20% stretched state. Without the blending of any other elastomeric matrix, ISHCP maintains its initial electrical properties under a cyclic stretch-release of over 50% strain. A fully stretchable electrochromic device based on ISHCP is fabricated and shows a performance of 47.7% ∆T and high coloration efficiency of 434.1 cm2/C at 590 nm. The device remains at 45.2% ∆T after 50% strain stretching. A simple patterned electrolyte layer on a stretchable electrochromic device is also realized. The fabricated device, consisting of all-plastic, can be applied by a solution process for large scale production. The ISHCP reveals its potential application in stretchable electrochromic devices and satisfies the requirements for next-generation stretchable electronics.

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Section: Introductionmentioning

confidence: 97%

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Kim

Park

et al. 2020

Sci Rep

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“…For diffraction grating patterns and photonic crystals with nanostructures in a two-dimensional layer, a variety of stimulation methods, such as mechanical stretching, 54–56 magnetic modulation, 57–59 electrophoresis 60,61 and solvent swelling 62–66 via different actuators e.g. shape memory alloy springs, 67 dielectric elastomer actuators, 34,68–70 twisted and coiled polymer actuators 71 etc. , have been proposed to realize the dynamic regulation of the nanostructure.…”

Section: Introductionmentioning

confidence: 99%

“…Previous efforts have been mostly devoted to regulating the grating pitch 67–69,71,72 by stretching the photonic layer with bulky stretching devices or actuators. This makes it difficult to achieve the integration of multiple photonic layers towards a compact active coloration pattern due to the small area ratio of the photonic layer in the entire device.…”

Section: Introductionmentioning

confidence: 99%

A bioinspired, electroactive colorable and additive manufactured photonic artificial muscle

Jiang

et al. 2022

Soft Matter

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“…Light propagation control using photonic crystals with periodically repeating dielectric structures has attracted considerable research interest for various photonic applications, such as color excitation, [1][2][3][4][5] imaging, [6][7][8][9] lasers, [10][11][12] and optical sensors. [13][14][15][16] Using a sophisticated nanopatterning process to repeat periodic spatial arrangements in dielectric materials, artificial 1D, [17][18][19][20][21] 2D, [22][23][24] and 3D [25][26][27] photonic forbidden band structures [28][29][30][31][32] can be obtained. However, colored light propagation control is found in various natural self-organized dielectric nano-periodic structures with large areas, in contrast to artificial nanophotonic structures with limited scalability; these naturally occurring structures can also control their photonic wavelength.…”

Section: Introductionmentioning

confidence: 99%

Color‐Tuning Mechanism of Electrically Stretchable Photonic Organogels

et al. 2022

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In contrast to nano‐processed rigid photonic crystals with fixed structures, soft photonic organic hydrogel beads with dielectric nanostructures possess advanced capabilities, such as stimuli‐responsive deformation and photonic wavelength color changes. Recenlty, advanced from well‐investigated mechanochromic method, an electromechanical stress approach is used to demonstrate electrically induced mechanical color shifts in soft organic photonic hydrogel beads. To better understand the electrically stretchable color change functionality in such soft organic photonic hydrogel systems, the electromechanical wavelength‐tuning mechanism is comprehensively investigated in this study. By employing controllable electroactive dielectric elastomeric actuators, the discoloration wavelength‐tuning process of an electrically stretchable photonic organogel is carefully examined. Based on the experimental in‐situ response of electrically stretchable nano‐spherical polystyrene hydrogel beads, the color change mechanism is meticulously analyzed. Further, changes in the nanostructure of the symmetrically and electrically stretchable organogel are analytically investigated through simulations of its hexagonal close‐packed (HCP) lattice model. Detailed photonic wavelength control factors, such as the refractive index of dielectric materials, lattice diffraction, and bead distance in an organogel lattice, are theoretically studied. Herein, the switcing mechanism of electrically stretchable mechanochromic photonic organogels with photonic stopband‐tuning features are suggested for the first time.

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Stretchable electrochromic devices enabled via shape memory alloy composites (SMAC) for dynamic camouflage

Cited by 27 publications

References 51 publications

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

Design of intrinsically stretchable and highly conductive polymers for fully stretchable electrochromic devices

A bioinspired, electroactive colorable and additive manufactured photonic artificial muscle

Color‐Tuning Mechanism of Electrically Stretchable Photonic Organogels

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