Free-standing SWNTs/VO2/Mica hierarchical films for high-performance thermochromic devices

Chen, Yuliang; Fan, Lele; Fang, Q.; Xu, Weiyu; Shi, Chen; Zan, Guibin; Ren, Hui; Li, Song; Zou, Chongwen

doi:10.1016/j.nanoen.2016.11.030

Cited by 64 publications

(42 citation statements)

References 43 publications

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“…Various TCE materials, such as Ag nanowires, carbon nanotube, Al‐doped ZnO, ITO/FTO and graphene are incorporated with VO 2 to activate its thermochromic performance. Specially, as shown in Figure a–d, the electrothermochromic device combining VO 2 nanoparticles with ultra‐long Ag nanowires can regulate the infrared transmittance dynamically as the input voltage and action time change.…”

Section: Strategies To Enhance Thermochromic Performance Of Vo2 Smartmentioning

confidence: 99%

“…The infrared modulation has high stability and reversibility, and the infrared response time depends on the input voltage: the higher the input voltage, the shorter the response time . This kind of electrothermochromic device can also be built on layered transferable mica sheets to expand the applications of VO 2 (Figures e and f) . Beydaghyan and co‐workers fabricated VO 2 films on ITO sublayers, which showed that the MIT in VO 2 can be induced by Joule heating produced by ITO layer, and a reversible transmission switching reaches as much as 65% at 2500 nm.…”

Section: Strategies To Enhance Thermochromic Performance Of Vo2 Smartmentioning

confidence: 99%

“…e) scheme illustration of the fabrication process for the SWNTs/VO 2 /mica hierarchical films; f) Peeling off the sample from mica substrate to obtain a nearly free‐standing VO 2 /mica structure. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Strategies To Enhance Thermochromic Performance Of Vo2 Smartmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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Vanadium dioxide (VO ) is a widely studied inorganic phase change material, which has a reversible phase transition from semiconducting monoclinic to metallic rutile phase at a critical temperature of τ ≈ 68 °C. The abrupt decrease of infrared transmittance in the metallic phase makes VO a potential candidate for thermochromic energy efficient windows to cut down building energy consumption. However, there are three long-standing issues that hindered its application in energy efficient windows: high τ , low luminous transmittance (T ), and undesirable solar modulation ability (ΔT ). Many approaches, including nano-thermochromism, porous films, biomimetic surface reconstruction, gridded structures, antireflective overcoatings, etc, have been proposed to tackle these issues. The first approach-nano-thermochromism-which is to integrate VO nanoparticles in a transparent matrix, outperforms the rest; while the thermochromic performance is determined by particle size, stoichiometry, and crystallinity. A hydrothermal method is the most common method to fabricate high-quality VO nanoparticles, and has its own advantages of large-scale synthesis and precise phase control of VO . This Review focuses on hydrothermal synthesis, physical properties of VO polymorphs, and their transformation to thermochromic VO (M), and discusses the advantages, challenges, and prospects of VO (M) in energy-efficient smart windows application.

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Section: Strategies To Enhance Thermochromic Performance Of Vo2 Smartmentioning

confidence: 99%

Section: Strategies To Enhance Thermochromic Performance Of Vo2 Smartmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Magdassi

Gao

et al. 2017

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295

185

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“…Hybrid metasurfaces can be dynamically tuned on demand by external stimuli, including carrier injection into the semiconductors, gate‐controlled graphene, phase transition of the phase‐change materials (PCMs), and electrically biasing the liquid‐crystal materials . Among them all, vanadium dioxide (VO 2 ) is particularly interesting as its intrinsic insulator‐to‐metal phase transition (IMT) is reversible through various external stimuli such as thermal heating, applied current, and optical pumping . Such ability endows VO 2 a fantastic candidate in electrically triggered and optical modulated hybrid metasurfaces.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Hybrid Metasurfaces for Dynamic Tuning of Terahertz Waves

Cai

Shi

Zou

et al. 2018

Advanced Optical Materials

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112

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Actively tuning optical transmission through hybrid metasurfaces incorporated with multifunctional active media holds great promise for the next generation optical devices. In the terahertz (THz) range, they remain rare due to the lack of dynamic and multifunctional designs and materials. Here, a vanadium dioxide (VO2)‐based hybrid metasurface is proposed to present multifunctional control of THz waves via electrically triggering and ultrafast optical excitation. By minimizing the thermal mass of VO2 and optimizing the VO2 patterns within two side gaps of the asymmetric split‐ring resonators, a hybrid metasurface which can tune the THz wave with an absolute modulation depth up to 54% and a figure of merit as high as 138% is hereby presented. The hybrid metasurface achieves a switching time of 2.2 s under the electrically triggering and offers an ultrafast modulation within 30 ps under the femtosecond pulse excitation. More interestingly, owing to the intrinsic hysteresis behavior of VO2, the hybrid metasurface exhibits distinguishing multistate transmission amplitudes with a single electrical input. In short, this study paves the way for robust multifunctionality in electric‐controlled terahertz switching, photonic memory, and ultrafast terahertz optics.

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“…We note that, until now, there are few studies about crystalline WO 3 thin film deposited onto flexible natural mica. Furthermore, because of the weak van der Waals interaction between mica layers, the substrate could be thinned to obtain a nearly freestanding heterostructure by exfoliation and cleaving methods . The fabricated heterostructure owns inherent flexible nature without any redundant transfer progress.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation Dynamics of Electrically Controlled Metal–Insulator Transition in Proton‐Gated Transparent and Flexible WO₃ Transistors

Deng

Zhao

et al. 2019

Adv Funct Materials

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Electrolyte gating is widely adopted to electrically control the physical properties of materials, leading to numerous intriguing phenomena and various applications. However, the carrier modulation mechanism remains heavily controversial. Herein, using natural mica pieces as substrates and ionic gel as the dielectric layer, all-transparent and flexible WO 3 transistor configuration is designed to in situ monitor the dynamic doping process of electrolyte gating. A reversible and vacuum-dominant volatile/nonvolatile metal-insulator transition (MIT) is observed in electrolyte-gated WO 3 thin films. In situ X-ray diffraction experiments, together with first-principles calculations, reveal an abrupt and symmetric structural evolution through two distinct hydrogenated metastable phases and phase separation progress. The fast volatility is assigned to a spontaneous dehydrogenation process. A prototype of a flexible vacuum meter is demonstrated on the basis of the unique vacuum-dependent MIT, exhibiting a measurement range down to 1.0 × 10 −6 mbar and no injury of electromagnetic radiation. These findings bring new insights into hydrogenation dynamics, paving a feasible way for the realization of user-friendly flexible electronics.

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Free-standing SWNTs/VO2/Mica hierarchical films for high-performance thermochromic devices

Cited by 64 publications

References 43 publications

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Multifunctional Hybrid Metasurfaces for Dynamic Tuning of Terahertz Waves

Hydrogenation Dynamics of Electrically Controlled Metal–Insulator Transition in Proton‐Gated Transparent and Flexible WO₃ Transistors

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Free-standing SWNTs/VO2/Mica hierarchical films for high-performance thermochromic devices

Cited by 64 publications

References 43 publications

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO2 Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Multifunctional Hybrid Metasurfaces for Dynamic Tuning of Terahertz Waves

Hydrogenation Dynamics of Electrically Controlled Metal–Insulator Transition in Proton‐Gated Transparent and Flexible WO3 Transistors

Contact Info

Product

Resources

About

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrothermal Synthesis of VO₂ Polymorphs: Advantages, Challenges and Prospects for the Application of Energy Efficient Smart Windows

Hydrogenation Dynamics of Electrically Controlled Metal–Insulator Transition in Proton‐Gated Transparent and Flexible WO₃ Transistors