Nanostructured tungsten oxide thin film devices: from optoelectronics and ionics to iontronics

Zhang, Hai; Wei, Zihan; Chen, Xue; Xu, Huibin; Verpoort, Francis

doi:10.1039/c9tc04489b

Cited by 56 publications

(36 citation statements)

References 166 publications

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Section: Introductionmentioning

confidence: 99%

“…Tungsten oxide (WO 3 ) is a typical n-type metal oxide semiconductor with a tunable optical bandgap in the range of 2.5 -3.2 eV [1,2]. Moreover, WO 3 is stable in both acid and base environment, harmless to humans, abundant in the Earth, and especially has the electrochromic property [1,2]. These properties have made WO 3 become one of the most studied metal oxides for various applications such as gas sensors [3], photocatalysis [4], and smart window applications [5].…”

Section: Introductionmentioning

confidence: 99%

“…. Recently, the study on WO 3 materials is once more blooming for cutting-edge applications such as water splitting, smart window, pathogen control, optoelectronic devices, film-based field-effect transistor, and even surface-enhanced Raman scattering substrate [1,2,[6][7][8]. These cutting-edge applications mainly rely on the high charge transferability of WO 3 [6].…”

Section: Introductionmentioning

confidence: 99%

“…The charge transferability of tungsten oxide originates from the crystal structure and the oxygen vacancy on WO 3 [6][7][8][9][10]. The crystal structure of tungsten oxide is counted as the assembly of the WO 6 octahedra via corner-sharing (monoclinic, hexagonal, cubic, orthorhombic, hexagonal, triclinic, tetragonal phases -WO 3 ) and/or edge-sharing (magneli phase -WO 3−x which only appears in the oxygen-deficient environment) arrangements [1,2,11]. Note that, at room temperature, monoclinic and hexagonal phases are the most stable phases which are mainly studied for long-term applications [1,2,11].…”

Section: Introductionmentioning

confidence: 99%

“…The crystal structure of tungsten oxide is counted as the assembly of the WO 6 octahedra via corner-sharing (monoclinic, hexagonal, cubic, orthorhombic, hexagonal, triclinic, tetragonal phases -WO 3 ) and/or edge-sharing (magneli phase -WO 3−x which only appears in the oxygen-deficient environment) arrangements [1,2,11]. Note that, at room temperature, monoclinic and hexagonal phases are the most stable phases which are mainly studied for long-term applications [1,2,11]. The arrangement of WO 6 octahedra creates tunnels through that small ion could intercalate resulting in ion transferability.…”

Section: Introductionmentioning

confidence: 99%

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Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

Nguyen

Pham

et al. 2020

Comm. in Phys.

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Monoclinic tungsten oxide (WO3) nanoplates were synthesized via a two-step simple process: acid precipitation at room temperature to prepare WO3.H2O nanoplates and annealing at high temperature (400 and 500 oC) in ambient air to obtain WO3 nanoplates. The effect of annealing temperature on physical properties (morphology, oxygen deficiency, crystallinity, optical properties, and photocatalytic activity) of WO3 nanoplates was studied. At both two studied annealing temperatures, all samples have the stable monoclinic structure and visible light-range optical bandgap, but the morphology and photocatalytic activity of the samples vary significantly with annealing temperature. At higher annealing temperature (500 oC), the sample has both nanoplate and nanograin morphologies with round edges, higher crystallinity, larger optical bandgap (2.71 eV), and lower photocatalytic activity. The sample annealed at 400 oC has nanoplate morphology with sharp edges, lower optical bandgap (2.63 eV), and higher photocatalytic which shows a high potential for photocatalytic application under visible light irradiation. The effect of the annealing temperature on the properties of WO3 nanoplates is assigned to the dehydration, the coalescence, and/or the melting processes at high temperatures. Dehydration causes the formation of oxygen vacancy – oxygen deficiency. The coalescence and/or the melting result in the changing of morphology and the decrease of the oxygen vacancies. These results imply a simple, cost-effective method to prepare highly oxygen-deficient WO3 nanoplates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

Nguyen

Pham

et al. 2020

Comm. in Phys.

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Emerging 2D Metal Oxides: From Synthesis to Device Integration

et al. 2023

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2D metal oxides have aroused increasing attention in the field of electronics and optoelectronics due to their intriguing physical properties. In this review, an overview of recent advances on synthesis of 2D metal oxides and their electronic applications is presented. First, the tunable physical properties of 2D metal oxides that relate to the structure (various oxidation‐state forms, polymorphism, etc.), crystallinity and defects (anisotropy, point defects, and grain boundary), and thickness (quantum confinement effect, interfacial effect, etc.) are discussed. Then, advanced synthesis methods for 2D metal oxides besides mechanical exfoliation are introduced and classified into solution process, vapor‐phase deposition, and native oxidation on a metal source. Later, the various roles of 2D metal oxides in widespread applications, i.e., transistors, inverters, photodetectors, piezotronics, memristors, and potential applications (solar cell, spintronics, and superconducting devices) are discussed. Finally, an outlook of existing challenges and future opportunities in 2D metal oxides is proposed.

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Dual‐band electrochromic materials for energy‐saving smart windows

Zhao

Wang

Zhu

et al. 2022

Carbon Neutralization

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Smart windows refer to those which can dynamically modulate the transmitted light by changing their colors. Dual-band electrochromic materials (ECMs) refer to materials that can change their colors and regulate light transmission in both visible (VIS) and infrared (IR) regions under different voltages. The dual-band ECMs-based building windows can thus regulate the indoor temperature to reduce the energy consumption for heating and airconditioning systems. Therefore, the wide application of ECMs in building windows will contribute a lot to establishing an energy-saving society. During the past decades, enormous efforts have been made to improve the performance of dual-band ECMs. This review presents a summary of the recent progress of dual-band ECMs, focusing on their modulation mechanism, material design, and performance optimization. Finally, the challenges and outlook of dual-band ECMs are also discussed.

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Nanostructured tungsten oxide thin film devices: from optoelectronics and ionics to iontronics

Abstract: Recent progress of nanostructured tungsten oxide thin film devices is reviewed from optoelectronics and ionics to iontronics with their development trends, challenges, and opportunities analyzed and proposed.

Cited by 56 publications

References 166 publications

Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

Tungsten Oxide Nanoplates: Facile Synthesis, Controllable Oxygen Deficiency and Photocatalytic Activity

Emerging 2D Metal Oxides: From Synthesis to Device Integration

Dual‐band electrochromic materials for energy‐saving smart windows

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