Enhanced electrochromic properties of TiO2 nanocrystal embedded amorphous WO3 films

Han, Jisu; Ko, Kwan-Woo; Sarwar, Saad; Lee, Moon Soo; Park, Sunghyeok; Hong, Suk In; Han, Chi‐Hwan

doi:10.1016/j.electacta.2018.05.026

Cited by 37 publications

(9 citation statements)

References 51 publications

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“…Compared with the switching time of 11.7 and 14.6 s for coloring and bleaching, respectively, of bare WO 3 , those were 7.2 and 2.2 s for 5% Fe-doped WO 3 . WO 3 films doped with C [ 134 ], N [ 135 ], P [ 136 ], Ni [ 126 , 137 ], Mo [ 138 , 139 ], Co [ 140 ], Sb [ 141 ], Ag [ 142 ], Au [ 143 ], Gd [ 144 ], Tb [ 145 ], SiO 2 [ 146 ], TiO 2 [ 147 ], V 2 O 5 [ 148 ], etc., have been reported before. Their positive effects on WO 3 EC films are summarized in Figure 10 .…”

Section: Electrochromic Applicationsmentioning

confidence: 99%

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Han

Shi

2021

Nanomaterials

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Tungsten oxide-based materials have drawn huge attention for their versatile uses to construct various energy storage devices. Particularly, their electrochromic devices and optically-changing devices are intensively studied in terms of energy-saving. Furthermore, based on close connections in the forms of device structure and working mechanisms between these two main applications, bifunctional devices of tungsten oxide-based materials with energy storage and optical change came into our view, and when solar cells are integrated, multifunctional devices are accessible. In this article, we have reviewed the latest developments of tungsten oxide-based nanostructured materials in various kinds of applications, and our focus falls on their energy-related uses, especially supercapacitors, lithium ion batteries, electrochromic devices, and their bifunctional and multifunctional devices. Additionally, other applications such as photochromic devices, sensors, and photocatalysts of tungsten oxide-based materials have also been mentioned. We hope this article can shed light on the related applications of tungsten oxide-based materials and inspire new possibilities for further uses.

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Section: Electrochromic Applicationsmentioning

confidence: 99%

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Han

Shi

2021

Nanomaterials

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“…Han et al [172] presented some TiO2-doped WO3 films. Starting from the consideration that It is widely recognized that nanosized materials show increased specific surface areas, porosity, and roughness, giving rise, in several cases, to extraordinary physical, chemical, and functional properties [167].…”

Section: Tio 2 In the Design Of Chromogenic Devices-general Considerationsmentioning

confidence: 99%

“…Han et al [172] presented some TiO 2 -doped WO 3 films. Starting from the consideration that mixed WO 3 -TiO 2 thin film had a five times longer lifetime than bare WO 3 , they prepared amorphous WO 3 thin films, embedding crystalline anatase TiO 2 by dipcoating.…”

Section: Tio 2 In the Design Of Chromogenic Devices-general Considerationsmentioning

confidence: 99%

Titanium Dioxide in Chromogenic Devices: Synthesis, Toxicological Issues, and Fabrication Methods

2020

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The use of titanium dioxide (TiO2) within two specific classes of devices, namely electrochromic and photoelectrochromic, is described hereafter, with respect to its inherent properties and chromogenic features within architectures that have appeared so far, in this field. The new research trends, involving the applications of TiO2 in chromogenic materials are reported, with particular attention paid to the techniques used for film deposition as well as the synthesis of nanoparticles. Furthermore, the main studies concerning its chemical-physical properties and approaches to its chemical syntheses and fabrication are reviewed, with special regard to “green” routes. In addition, the main aspects relating to toxicological profiles are exposed, with reference to nanoparticles and thin films.

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“…More et al [27] have reported the preparation of WO 3 electrochromic films by electrodeposition and the resultant WO 3 film exhibited amorphous nature, closed packed nano-granular morphology, good coloration efficiency and visible high transmittance. However, unsatisfactory optical modulation [28], long switching time [29] and short life time limit [30] its electrochromic effectiveness. To overcome these obstacles, significant efforts have been made to synthesis of porous WO 3 electrochromic films to enhance its electrochromic performance.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Ti-Doped Hierarchically Mesoporous Silica Microspheres/Tungsten Oxide Nanocrystallines Hybrid Films and Their Electrochromic Performance

Zhang

et al. 2019

Nanomaterials

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In this paper, a novel Ti-doped hierarchically mesoporous silica microspheres/tungsten oxide (THMS/WO3) hybrid film was prepared by simultaneous electrodeposition of Ti-doped hierarchically mesoporous silica microspheres (THMSs) and WO3 nanocrystallines onto the fluoride doped tin dioxide (FTO) coated glass substrate. It is demonstrated that the incorporation of THMSs resulted in the hybrid film with improved electrochromic property. Besides, the content of THMSs plays an important role on the electrochromic property of the hybrid film. An excellent electrochromic THMS/WO3 hybrid film with good optical modulation (52.00% at 700 nm), high coloration efficiency (88.84 cm2 C−1 at 700 nm), and superior cycling stability can be prepared by keeping the weight ratio of Na2WO4·2H2O (precursor of WO3):THMSs at 15:1. The outstanding electrochromic performances of the THMS/WO3 hybrid film were mainly attributed to the porous structure, which facilitates the charge-transfer, promotes the electrolyte infiltration and alleviates the expansion of the film during Li+ insertion. This kind of porous THMS/WO3 hybrid film is promising for a wide range of applications in smart homes, green buildings, airplanes, and automobiles.

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Enhanced electrochromic properties of TiO2 nanocrystal embedded amorphous WO3 films

Cited by 37 publications

References 51 publications

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Titanium Dioxide in Chromogenic Devices: Synthesis, Toxicological Issues, and Fabrication Methods

Electrodeposition of Ti-Doped Hierarchically Mesoporous Silica Microspheres/Tungsten Oxide Nanocrystallines Hybrid Films and Their Electrochromic Performance

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