Crystallized V2O5 as Oxidized Phase for Unexpected Multicolor Electrochromism in V2O3 Thick Film

Mjejri, Issam; Gaudon, Manuel; Song, Giljoo; Labrugère, Christine; Rougier, Aline

doi:10.1021/acsaem.8b00386

Cited by 45 publications

(42 citation statements)

References 43 publications

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“…All the diffraction peaks match the ones of the orthorhombic crystalline phase (JCPDS# 00-041-1426) and of the ITO substrate (JCPDS # 44-1087). Besides, as observed for un-doped V2O5 preferential orientation along the (001) crystallographic direction is clearly detected [44].…”

Section: Iii21 Electrochromic Properties In Lithium Based Electrolytesupporting

confidence: 52%

Mo addition for improved electrochromic properties of V2O5 thick films

Mjejri

Gaudon

Rougier

2019

Solar Energy Materials and Solar Cells

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Transition metal oxides (TMOs) have attracted considerable attention due to their variety of chromogenic properties. Among them, vanadium pentoxide (V2O5) has gained significant interest in respect of multichromism associated with orange, green and blue colors. Herein, we report a simple and easy method for the fabrication of Mo doped V2O5 thick films, leading to improved cyclability. Molybdenum doped vanadium pentoxide powders were synthesized from one single polyol route through the precipitation of an intermediate precursor: molybdenum doped vanadium ethyleneglycolate (Mo doped VEG). The as-synthesized Mo-doped V2O5 exhibits improved electrochromic performance in terms of capacity, cycling stability, and color contrast compared to single-component V2O5 in lithium as well as sodium based electrolyte. The improvement in EC performances lies in films of higher porosity as well as higher diffusion coefficients. To conclude, an electrochromic device combining Mo-V2O5 to WO3.2H2O, via a PMMA-lithium based electrolyte membrane exhibit simultaneously reversible color change from yellow to green for Mo-V2O5 and from blue to yellow white for WO3.2H2O with a cycling stability up to 10 000 cycles.

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Section: Iii21 Electrochromic Properties In Lithium Based Electrolytesupporting

confidence: 52%

Mo addition for improved electrochromic properties of V2O5 thick films

Mjejri

Gaudon

Rougier

2019

Solar Energy Materials and Solar Cells

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“…The PEDOT:PSS film goes back to its most stable state exhibiting no memory effect with a very low value difference between initial and 3 months values. On the contrary, as reported by our group in a prior work, V 2 O 5 shows a strong memory effect (Mjejri et al, 2018a). After 3 months, if the chromaticity parameters exhibit different values as compared to the first applied voltage at E = −1 V they also display a big difference with the initial data.…”

Section: Electrochromic Properties Of 90 Wt%-10 Wt% Pedot:pss-v 2 Osupporting

confidence: 42%

“…The hybrid electrochromic inks were formulated from the mixture of the commercial PEDOT:PSS ink Agfa Orgacon EL-P5015 and V 2 O 5 powders synthesized by polyol process (Mjejri et al, 2018a). The commercial PEDOT:PSS ink characterized by high-viscosity commercial paste (>100,000 mPa•s) developed for screen printing was first homogenized with a three-roll mill and then diluted with ethanol to lower the viscosity.…”

Section: Hybrid Inks Formulationmentioning

confidence: 99%

PEDOT:PSS-V2O5 Hybrid for Color Adjustement in Electrochromic Systems

et al. 2020

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Electrochromism is known as a modulation of the optical properties under an applied voltage. Used in various applications, aside to the commercialized smart windows based on transmissive electrochromic devices (ECDs), the opaque systems have received significant interest for displays purposes. Herein, in a novel approach to adjust color, electrochromic oxides with high EC performance were chosen as additives to commercialized conductive and electrochromic polymer ink. More precisely opaque films were deposited (using Bar Coater) from mixtures of V 2 O 5 , synthesized by polyol process, with poly(3,4-ethylenedioxythiophene, polystyrene sulfonate) PEDOT:PSS commercial ink in different weight percentages (wt%) ranging from 0 to 100 (V 2 O 5 wt%). Films thicknesses varied from hundred of nms to few µms. As-deposited films colors range from blue for PEDOT:PSS to orange for V 2 O 5. PEDOT:PSS-V 2 O 5 films exhibit significant electrochromic properties associated with a good electrochemical stability. In the series, the hybrid film with 90 wt%-10 wt% PEDOT:PSS-V 2 O 5 shows a reversible behavior with significant reflectance modulation (R≈20.5% at 550 nm) in lithium based electrolyte and a good contrast (E * > 30). The maximum contrast was reached for 3.7 µm thick layer. Our results indicate that the hybrid film, combining the benefit of mixing inorganic and organic materials, are promising materials for enhancing electrochromic devices color and hybrid electrochromic materials processability on large scale.

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“…Although the intercalation of sodium ions was shown to improve the electrical conductivity of SVO in zinc-ion batteries 18 , to date, there is no report on the utilization of SVO for electrochromic devices. The current state-of-the-art vanadium oxide-based electrochromic display research has focused on developing nanostructured vanadium oxides (e.g., 13,19,20 without paying attention to potential electrochromic materials such as SVO. The SVO nanorods are compatible with a simple bar-coating method for fabricating electrochromic films when mixed with cellulose.…”

Section: Introductionmentioning

confidence: 99%

Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices

et al. 2020

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Electrochromic displays have been the subject of extensive research as a promising colour display technology. The current state-of-the-art inorganic multicolour electrochromic displays utilize nanocavity structures that sacrifice transparency and thus limit their diverse applications. Herein, we demonstrate a transparent inorganic multicolour display platform based on Zn-based electrochromic devices. These devices enable independent operation of top and bottom electrochromic electrodes, thus providing additional configuration flexibility of the devices through the utilization of dual electrochromic layers under the same or different colour states. Zn-sodium vanadium oxide (Zn-SVO) electrochromic displays were assembled by sandwiching Zn between two SVO electrodes, and they could be reversibly switched between multiple colours (orange, amber, yellow, brown, chartreuse and green) while preserving a high optical transparency. These Zn-SVO electrochromic displays represent the most colourful transparent inorganic-based electrochromic displays to date. In addition, the Zn-SVO electrochromic displays possess an open-circuit potential (OCP) of 1.56 V, which enables a self-colouration behaviour and compelling energy retrieval functionality. This study presents a new concept integrating high transparency and high energy efficiency for inorganic multicolour displays.

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Crystallized V₂O₅ as Oxidized Phase for Unexpected Multicolor Electrochromism in V₂O₃ Thick Film

Cited by 45 publications

References 43 publications

Mo addition for improved electrochromic properties of V2O5 thick films

Mo addition for improved electrochromic properties of V2O5 thick films

PEDOT:PSS-V2O5 Hybrid for Color Adjustement in Electrochromic Systems

Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices

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