Versatile displays based on a 3-dimensionally ordered macroporous vanadium oxide film for advanced electrochromic devices

Tong, Zhongqiu; Yang, Haowei; Na, Li; Qu, Hui‐Ying; Zhang, Xiang; Zhao, Jiupeng; Li, Yao

doi:10.1039/c5tc00029g

Cited by 48 publications

(40 citation statements)

References 43 publications

(124 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4b). Usually, the valence of vanadium ions in vanadia films can change from þ 5 to þ 3 between þ1 V and À 1 V (versus Ag/AgCl) [13,27], indicating that different voltages could lead to different mixtures of V 5 þ , V 4 þ , and V 3 þ ions, resulting in more than two color changes in the voltage window of 7 1 V [27]. Digital photos of the coralline nanorod architecture at 0.5 V, 0 V, and À 0.5 V are also exhibited in Fig.…”

Section: Evaluation Of Electrochromic and Electrochemical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Annealing synthesis of coralline V2O5 nanorod architecture for multicolor energy-efficient electrochromic device

Tong

et al. 2016

Solar Energy Materials and Solar Cells

Self Cite

103

View full text Add to dashboard Cite

Section: Evaluation Of Electrochromic and Electrochemical Propertiesmentioning

confidence: 99%

“…[27]) in combination with a CHI 660C electrochemical workstation (Shanghai Chenhua Instrument Co. Ltd.). The experimental setup was sealed in argon-filled glove box (Vigor Glove Box from Suzhou, China) before testing.…”

Section: Characterization and Evaluation Of Electrochromic Propertiesmentioning

confidence: 99%

Annealing synthesis of coralline V2O5 nanorod architecture for multicolor energy-efficient electrochromic device

Tong

et al. 2016

Solar Energy Materials and Solar Cells

Self Cite

103

View full text Add to dashboard Cite

“…The variations in covalency in these systems has additional importance beyond those points already discussed. Lattice covalency will affect the polaron mass, which strongly affects conductivity and is therefore critical for any device applications …”

Section: Resultsmentioning

confidence: 99%

“…The accessibility of multiple oxidation states of the V ions also makes these materials of significant interest in the creation of supercapacitors . As such, these materials are of interest from the perspective of fundamental materials science, as well as for their potential applications at the frontiers of electronic device engineering, such as neuromorphic circuitry, Mott field‐effect transistors, and electrochromic devices …”

Section: Introductionmentioning

confidence: 99%

Structure‐Induced Switching of the Band Gap, Charge Order, and Correlation Strength in Ternary Vanadium Oxide Bronzes

Tolhurst

Andrews

Leedahl

et al. 2017

Chemistry A European J

View full text Add to dashboard Cite

Recently, V O nanowires have been synthesized as several different polymorphs, and as correlated bronzes with cations intercalated between the layers of edge- and corner- sharing VO octahedra. Unlike extended crystals, which tend to be plagued by substantial local variations in stoichiometry, nanowires of correlated bronzes exhibit precise charge ordering, thereby giving rise to pronounced electron correlation effects. These developments have greatly broadened the scope of research, and promise applications in several frontier electronic devices that make use of novel computing vectors. Here a study is presented of δ-Sr V O , expanded δ-Sr V O , exfoliated δ-Sr V O and δ-K V O using a combination of synchrotron soft X-ray spectroscopy and density functional theory calculations. The band gaps of each system are experimentally determined, and their calculated electronic structures are discussed from the perspective of the measured spectra. Band gaps ranging from 0.66 ± 0.20 to 2.32 ± 0.20 eV are found, and linked to the underlying structure of each material. This demonstrates that the band gap of V O can be tuned across a large portion of the range of greatest interest for device applications. The potential for metal-insulator transitions, tuneable electron correlations and charge ordering in these systems is discussed within the framework of our measurements and calculations, while highlighting the structure-property relationships that underpin them.

show abstract

“…have been reported. 47,48 This study provides a detailed investigation into the preparation of V 2 O 5 IOs focusing on the use of ED into preformed colloidal opal templates as a function of ED parameters (sphere size, voltage, time and substrate). Initially, the influence of substrate for ED of IO structures is investigated by comparing IO nucleation and growth on stainless steel (SS), heated (oxidized) stainless steel (HSS) and FTO.…”

mentioning

confidence: 99%

The Influence of Colloidal Opal Template and Substrate Type on 3D Macroporous Single and Binary Vanadium Oxide Inverse Opal Electrodeposition

O’Hanlon

McNulty

O’Dwyer

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

We report on the electrodeposition of 3D macroporous vanadium oxide inverse opals and binary inverse opals on transparent conducting oxide substrates and stainless steel and thermally oxidized stainless steel substrates. The electrodeposition follows a diffusion limited growth mode to form 3D porous crystalline V 2 O 5 after removal of a colloid photonic crystal template of selfassembled polystyrene spheres. Inverse opals were grown using spheres ranging in diameter from 0.5 μm to 6 μm, and binary inverse opals were also electrodeposited using binary mixtures of sphere sizes. We demonstrate that the ionic diffusion that leads to growth has charge-to-mass Coulombic efficiency ranging from 60-90%, depending on the voltage used. Additionally, the tortuosity in ionic diffusion through the opal to the substrate is significantly increased when large sphere diameter templates and binary opal templates are used. Analysis of the contribution of true substrate active area and the influence of template structure on ionic diffusivity confirms that inverse opal growth is dictated by the size of opal spheres, interstitial void clogging by smaller spheres in binary opals, and the conductivity of the substrate active area. which benefit from the large active surface-area to volume ratio and the ability of IOs to be fashioned with porosity that enhances the capture and waveguiding of light at certain energies at various angles of incidence, because IOs exhibit a pseudo photonic bandgap structure. 32Vanadium pentoxide (V 2 O 5 ) has been the subject of much research for over 40 years 33 and has been widely investigated as a cathode material for Li-ion batteries due to its high theoretical specific capacity, according to the following intercalation reaction: V 2 O 5 + xLi34,35 V 2 O 5 is useful for reversible Li-ion insertion and removal due to its mixed valance and layered structure. 25,31The mixed valence (V 4+ and V 5+ ) of V 2 O 5 allows for material expansion during intercalation with more electrolyte accessing the increased surface area, also helping decrease structural deformation of the material. 25,36 To date, a wide range of nanostructured V 2 O 5 mate- * Electrochemical Society Member. z E-mail: c.odwyer@ucc.ie rials (including nanowires, nanorods, etc. 34,37 ) have been examined as Li-ion cathode materials. In particular, 3D V 2 O 5 IO structures have shown extremely promising results in both and half-cell and full-cell configurations, prompting further research into mechanism of formation and control over their structure, geometry, crystallinity, size and composition/valence. 38 V 2 O 5 IOs have been formed using various routes including simple dropcast methods and more controlled electrodeposition (ED) approaches.7,25,32 ED of V 2 O 5 IOs has been achieved using a VOSO 4 aqueous solution (with subsequent heating allowing a transformation to crystalline V 2 O 5 ) producing dense material in the sphere template voids. Aside from the many alternative infiltration methods, creating binary inverse opals from binary opal t...

show abstract

Versatile displays based on a 3-dimensionally ordered macroporous vanadium oxide film for advanced electrochromic devices

Cited by 48 publications

References 43 publications

Annealing synthesis of coralline V2O5 nanorod architecture for multicolor energy-efficient electrochromic device

Annealing synthesis of coralline V2O5 nanorod architecture for multicolor energy-efficient electrochromic device

Structure‐Induced Switching of the Band Gap, Charge Order, and Correlation Strength in Ternary Vanadium Oxide Bronzes

The Influence of Colloidal Opal Template and Substrate Type on 3D Macroporous Single and Binary Vanadium Oxide Inverse Opal Electrodeposition

Contact Info

Product

Resources

About