Enhanced electrochromic characteristics induced by Au/PEDOT/Pt microtubes in WO3 based electrochromic devices

Karaca, Gözde Yurdabak; Eren, Esin; Çoğal, Gamze Çelik; Uygun, Emre; Öksüz, Lütfi; Öksüz, Ayşegül Uygun

doi:10.1016/j.optmat.2018.11.052

Cited by 33 publications

(11 citation statements)

References 49 publications

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“…The gel electrolyte was prepared like the mentioned preparation detail in our previous EC studies. 10 , 52 Two ECDs were designed in following forms. Active area of ECD was 2.5 cm × 2.5 cm.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…WO 3 and V 2 O 5 targets (0.25 thickness, 2 in. diameter) were purchased from China Leadmat Advanced Materials Co. Ltd. Poly(methylmethacrylate) (Alfa Aesar), propylene carbonate (Sigma-Aldrich), lithium perchlorate (LiClO 4 , Sigma-Aldrich), and acetonitrile (Merck) were used for gel electrolyte preparation for ECD. , ITO-coated polyethylene terephthalate (PET) substrates having a sheet resistance of 80–100 Ω/sq and 25 μm thickness were supplied from Teknoma Company/Turkey, and the cleaning solvent (ethanol) was applied to them prior to use.…”

Section: Methodsmentioning

confidence: 99%

“…The flexible ECDs were produced by sandwiching of the gel electrolyte between the working electrode (WO 3 film) and counter electrode (ITO film or V 2 O 5 film for single- or dual-type ECs). The gel electrolyte was prepared like the mentioned preparation detail in our previous EC studies. , Two ECDs were designed in following forms. Active area of ECD was 2.5 cm × 2.5 cm.…”

Section: Methodsmentioning

confidence: 99%

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Comparison of Machine Learning Models on Performance of Single- and Dual-Type Electrochromic Devices

et al. 2020

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This study shows that the model fitting based on machine learning (ML) from experimental data can successfully predict the electrochromic characteristics of single- and dual-type flexible electrochromic devices (ECDs) by using tungsten trioxide (WO 3 ) and WO 3 /vanadium pentoxide (V 2 O 5 ), respectively. Seven different regression methods were used for experimental observations, which belong to single and dual ECDs where 80% percent was used as training data and the remaining was taken as testing data. Among the seven different regression methods, K -nearest neighbor (KNN) achieves the best results with higher coefficient of determination ( R 2 ) score and lower root-mean-squared error (RMSE) for the bleaching state of ECDs. Furthermore, higher R 2 score and lower RMSE for the coloration state of ECDs were achieved with Gaussian process regressor. The robustness result of the ML modeling demonstrates the reliability of prediction outcomes. These results can be proposed as promising models for different energy-saving flexible electronic systems.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Comparison of Machine Learning Models on Performance of Single- and Dual-Type Electrochromic Devices

et al. 2020

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“…For the EC layer, the active cations (Li + , Na + , and H + ) intercalate into the EC layer through a small bias voltage and deintercalation from the EC by a reverse bias voltage. This process bleaches/colors the EC film through the stimulus [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Thermal Annealing Effects of V2O5 Thin Film as an Ionic Storage Layer for Electrochromic Application

et al. 2022

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A vanadium pentoxide (V2O5) thin film with thermal annealing as an ionic storage layer for electrochromic devices is presented in our study. The V2O5 thin film was deposited on an ITO glass substrate by an RF magnetron sputtering. The electrochromic properties of the film were evaluated after various thermal annealing temperatures. The structural analysis of the film was observed by X-ray diffraction (XRD), field emission electron microscopy (FE-SEM), and atomic force microscopy (AFM). The structure of the V2O5 thin film transformed from an amorphous to polycrystalline structure with directions of (110) and (020) after 400 °C thermal annealing. The electrochromic properties of the film improved compared with the unannealed V2O5 thin film. We obtained a charge capacity of 97.9 mC/cm2 with a transparent difference ΔT value of 31% and coloration efficiency of 6.3 cm2/C after 400 °C thermal annealing. The improvement was due to the polycrystalline orthorhombic structure formation of V2O5 film by the rearrangement of atoms from thermal energy. Its laminate structure facilitates Li+ ion intercalation and increases charge capacity and transparent difference.

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“…Electrons and perchlorate ions are inserted into the PEDOT thin film simultaneously to maintain the thin film’s natural state and are extracted from the thin film during oxidation. Efforts have been attempted to improve the coloring-switching rate of PEDOT electrodes, such as structure modifications [ 12 , 13 , 14 ] or incorporating other species [ 15 , 16 , 17 ]. Micropatterned PEDOT electrodes have been sporadically studied for sensor applications or optical properties [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Micropatterned Poly(3,4-ethylenedioxythiophene) Thin Films with Improved Color-Switching Rates and Coloration Efficiency

Lin

Cheng

2022

Polymers

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Electrochromic materials carry out redox reactions and change their colors upon external bias. These materials are the primary component in constructing smart windows for energy saving in buildings or vehicles. Enhancing the electrochromic performances of the materials is crucial for their practical applications. Micropatterned poly(3,4-ethylenedioxythiophene) (mPEDOT) thin films are electrodeposited on indium tin oxide conducting glass in this study. Their electrochromic properties, including transmittance modulation ability, color-switching rates, and coloration efficiency, are investigated and compared with nonpatterned PEDOT thin films. The mPEDOT thin films exhibited faster coloring and bleaching speeds and higher coloration efficiency than the PEDOT thin films while keeping similar transmittance modulation ability. The results suggest that micropatterning an electrochromic material thin film might enhance its electrochromic performances. This research demonstrates the possibility of promoting the color-switching rate of a PEDOT thin film by micropatterning it.

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Enhanced electrochromic characteristics induced by Au/PEDOT/Pt microtubes in WO3 based electrochromic devices

Cited by 33 publications

References 49 publications

Comparison of Machine Learning Models on Performance of Single- and Dual-Type Electrochromic Devices

Comparison of Machine Learning Models on Performance of Single- and Dual-Type Electrochromic Devices

Thermal Annealing Effects of V2O5 Thin Film as an Ionic Storage Layer for Electrochromic Application

Micropatterned Poly(3,4-ethylenedioxythiophene) Thin Films with Improved Color-Switching Rates and Coloration Efficiency

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