Electrochromic and energy storage bifunctional Gd-doped WO<sub>3</sub>/Ag/WO<sub>3</sub>films

Yin, Yi; Gao, Tian; Xu, Qingfan; Cao, Gangqiang; Chen, Qi; Zhu, Haoyu; Lan, Changyong; Li, Chun

doi:10.1039/d0ta02079f

Cited by 26 publications

(15 citation statements)

References 117 publications

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“…The main Na 1s peak at ∼1072.3 eV was associated with the bulk sample, while the second peak at 1071.3 eV might have been connected with Na 2 CO 3 . These peaks all matched well with those of previous reports. , Moreover, based on fitting results from XPS Peakfit software, all fitted peaks moved slightly toward higher binding energy, which indicated that Yb 3+ occupied A sites in KNN . For an ionic compensation mechanism of A site donors in KNN, the presence of A-position vacancies increased conductivity and made it difficult to generate oxygen vacancies in KNN. , The XPS peak movement also illustrated the successful incorporation of Yb 3+ ions.…”

Section: Results and Discussionsupporting

confidence: 87%

“…33,38 Moreover, based on fitting results from XPS Peakfit software, all fitted peaks moved slightly toward higher binding energy, which indicated that Yb 3+ occupied A sites in KNN. 39 For an ionic compensation mechanism of A site donors in KNN, the presence of A-position vacancies Yb A •• increased conductivity and made it difficult to generate oxygen vacancies in KNN. 4,40 The XPS peak movement also illustrated the successful incorporation of Yb 3+ ions.…”

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confidence: 99%

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Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Zhao

Wang

Zhang

et al. 2020

ACS Appl. Electron. Mater.

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Environment-friendly potassium sodium niobate-based ferroelectrics have been widely and deeply studied for their electrical properties, but there remains much potential for applications in other fields, one of which is in optical temperature sensing. Herein, a host (K,Na)Li0.04NbO3:0.5 mol% Er material with an orthogonal–tetragonal phase transition was constructed by Li+ regulation and then increased Yb2O3 codoping used to promote the occurrence of orthogonal to tetragonal and tetragonal to pseudocubic phase transitions. Interestingly, codoping with Yb2O3 as a sensitizer and phase structural changes regulated the resulting materials’ luminescent characteristics and greatly enhanced luminescence intensity and temperature sensing properties, compared with those of merely Er3+-doped samples. In addition, strong green and red light emissions were related to the large absorption cross-section of Yb3+ near 980 nm, which transferred more energy to Er3+. In particular, significantly enhanced red light, or red shift, was associated with energy back transfer at high Yb3+ concentrations. Furthermore, the optimal ceramic was (K, Na)Li0.04NbO3:0.5 mol % Er/2.5 mol % Yb (KNL0.04N:0.5 Er/2.5 Yb), and its maximum absolute and relative sensitivity of 0.0112 and 0.0173 K–1, respectively, which were higher than those of other reports. These results showed that KNL0.04N:0.5Er/2.5Yb lead-free ceramic possessed the potential to be an excellent optical temperature sensor with high intensity and sensitivity.

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Section: Results and Discussionsupporting

confidence: 87%

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confidence: 99%

Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Zhao

Wang

Zhang

et al. 2020

ACS Appl. Electron. Mater.

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“…Starting with the fundamental electrochemical reaction, electrochromic performances of the WO 3− x depend on the transport rate of the cations and electrons as well as the ability to accommodate the cations in the film. Different advanced strategies have been studied to improve electrochromic performances such as the combination of crystalline and amorphous WO 3− x [ 20 , 21 ], regulation of nanotopography [ 6 , 22 , 23 ], element doping [ 18 , 24 , 25 ], and construction of composite materials [ 26 , 27 ]. On the one hand, the structure construction of tungsten oxide almost concentrates on the transport behavior of cations.…”

Section: Introductionmentioning

confidence: 99%

Boosting Transport Kinetics of Ions and Electrons Simultaneously by Ti3C2Tx (MXene) Addition for Enhanced Electrochromic Performance

Fang

et al. 2020

Nano-Micro Lett.

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Electrochromic technology plays a significant role in energy conservation, while its performance is greatly limited by the transport behavior of ions and electrons. Hence, an electrochromic system with overall excellent performances still need to be explored. Initially motivated by the high ionic and electronic conductivity of transition metal carbide or nitride (MXene), we design a feasible procedure to synthesize the MXene/WO3−x composite electrochromic film. The consequently boosted electrochromic performances prove that the addition of MXene is an effective strategy for simultaneously enhancing electrons and ions transport behavior in electrochromic layer. The MXene/WO3−x electrochromic device exhibits enhanced transmittance modulation and coloration efficiency (60.4%, 69.1 cm2 C−1), higher diffusion coefficient of Li+ and excellent cycling stability (200 cycles) over the pure WO3−x device. Meanwhile, numerical stimulation theoretically explores the mechanism and kinetics of the lithium ion diffusion, and proves the spatial and time distributions of higher Li+ concentration in MXene/WO3−x composite electrochromic layer. Both experiments and theoretical data reveal that the addition of MXene is effective to promote the transport kinetics of ions and electrons simultaneously and thus realizing a high-performance electrochromic device. This work opens new avenues for electrochromic materials design and deepens the study of kinetics mechanism of ion diffusion in electrochromic devices.

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“…The electrochromic tungsten oxide film transforms from a colorless film in the bleached state to a dark blue film in the colored state under the application of a potential. This transformation corresponds to the electronic transition between the different valence states of the tungsten ion, namely W +5 and W +6 , obtained by the redox reaction described by, 23,24

((), transparent) {WO}_{3} + {xLi}^{+} + {xe}^{-} \leftrightarrow {Li}_{x} {WO}_{3} ((), deep blue)

…”

Section: Introductionmentioning

confidence: 99%

Highly stable electrochromic cells based on amorphous tungsten oxides prepared using a solution‐annealing process

Nguyen

Huynh

et al. 2021

Int J Energy Res

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In this work, a facile sol-gel and annealing technique was employed to prepare amorphous electrochromic tungsten oxide thin films at a relatively low temperature. Specifically, ammonium metatungstate hydrate was blended in dimethylformamide and was used as the precursor for obtaining highly uniform and transparent amorphous WO x by simple spin-coating and calcining in ambient air at 250 C for 2 hours. The film exhibits an unprecedented stability over 4000 operational cycles with a high coloration efficiency of 125 cm 2 C −1 and fast switching times of 5 seconds for the colored state and 2.5 seconds for the bleaching state. Therefore, the prepared amorphous tungsten oxide film is a prominent material for the next generation of electrochromic devices that can be used in smart windows and electronic display devices.

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Electrochromic and energy storage bifunctional Gd-doped WO₃/Ag/WO₃films

Abstract: Transparent conductive WGd–Ag–WGd films with superior electrochromic and energy storage performance have been obtained on glass substrates by reactive sputtering.

Cited by 26 publications

References 117 publications

Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Boosting Transport Kinetics of Ions and Electrons Simultaneously by Ti3C2Tx (MXene) Addition for Enhanced Electrochromic Performance

Highly stable electrochromic cells based on amorphous tungsten oxides prepared using a solution‐annealing process

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Electrochromic and energy storage bifunctional Gd-doped WO3/Ag/WO3films

Abstract: Transparent conductive WGd–Ag–WGd films with superior electrochromic and energy storage performance have been obtained on glass substrates by reactive sputtering.

Cited by 26 publications

References 117 publications

Simultaneous Yb3+-Induced Phase Transition and Sensitized Luminescence in Er3+-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Simultaneous Yb3+-Induced Phase Transition and Sensitized Luminescence in Er3+-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Boosting Transport Kinetics of Ions and Electrons Simultaneously by Ti3C2Tx (MXene) Addition for Enhanced Electrochromic Performance

Highly stable electrochromic cells based on amorphous tungsten oxides prepared using a solution‐annealing process

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Electrochromic and energy storage bifunctional Gd-doped WO₃/Ag/WO₃films

Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry

Simultaneous Yb³⁺-Induced Phase Transition and Sensitized Luminescence in Er³⁺-Doped KNN-Based Lead-Free Ceramics for Optical Thermometry