A complementary electrochromic device based on Prussian Blue and Tungsten Trioxide: The influence of switching time operation on high performance and long-term stability

Pham, Nguyen Sy; Nguyen, Luan Thanh; Nguyên, Hà Trần; Nguyen, Anh Quoc Khuong

doi:10.1016/j.matlet.2023.134356

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…Recently, with the introduction of heteroatoms in the chain of the polymer, such as polythiophenes [ 10 ], and the use of the D-A-D method [ 11 ] it is possible to obtain greater control of the electrical properties of the materials improving electrochromic performances of the devices [ 12 ]. Due to its durability and low synthetic costs, Prussian blue offers fast transmittance switching properties with no memory effect that together with tungsten trioxide are used as electrochromic layers by in situ polymerization for the production of complementary electrochromic devices [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Development of Electrochromic Devices, Based on Polymeric Gel, for Energy Saving Applications

2023

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In this work, the implementation of an electrochromic device (10 cm × 10 cm in size) for energy saving applications has been presented. As electrochromic system has been used with an electrochromic solution (ECsol) made by ethyl viologen diperchlorate [EV(ClO4)2], 1,1′-diethyl ferrocene (DEFc) and propylene carbonate (PC), as solvent. The final system has been obtained by mixing the ECsol, described above, with a polymeric system made by Bisphenol-A glycerolate (1 glycerol/phenol) diacrylate (BPA) and 2,2-Dimethoxy-2-phenylacetophenone (Irgacure 651) in a weight percentage equal to 60:40% w/w, respectively. Lithography has been used to make a spacer pattern with a thickness of about 15–20 µm between the two substrates. Micro-Raman spectroscopy confirmed the presence of the EV•+ as justified by the blue color of the electrochromic device in the ON state. Electrochemical and optical properties of the electrochromic device have been studied. The device shows reversible electrochromic behavior as confirmed by cyclic color variation due to the reduction and oxidation process of the EV2+/EV•+ couple. The electrochromic device shows a variation of the % transmittance in the visible region at 400 nm of 59.6% in the OFF state and 0.48% at 3.0 V. At 606 nm the transmittance in the bleached state is 84.58% in the OFF state and then decreases to 1.01% when it is fully colored at 3.0 V. In the NIR region at 890 nm, the device shows a transmittance of 74.3% in the OFF state and 23.7% at 3.0 V while at 1165 nm the values of the transmittance changed from 83.21% in the OFF state to 1.58% in the ON state at 3.0 V. The electrochromic device shows high values of CCR% and exhibits excellent values of CE in both visible and near-infrared regions when switched between OFF/ON states. In the NIR region at 890 nm, electrochromic devices can be used for the energy-saving of buildings with a promising CE of 120.9 cm2/C and 420.1 cm2/C at 1165 nm.

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Section: Introductionmentioning

confidence: 99%

Development of Electrochromic Devices, Based on Polymeric Gel, for Energy Saving Applications

2023

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WO3 thin films grown on Si substrates: potential high Tc ferromagnetic semiconductors

Pham,

Hong

2024

Appl. Phys. A

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Well-defined ferromagnetism (FM) with a very high Tc of about 800 K was found in laser-ablated WO3 films grown on Si wafer substrates. It seems that the observed magnetism is surface related, and oxygen vacancies might play an important role in inducing FM into these oxide semiconductors. The very high Tc FM is observed for the first time in nanosized-WO3, indicating a great potential for spintronic applications.

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Recent progress in Prussian blue electrode for electrochromic devices

Zhang,

Li,

Gong

et al. 2024

Front. Energy

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A complementary electrochromic device based on Prussian Blue and Tungsten Trioxide: The influence of switching time operation on high performance and long-term stability

Cited by 5 publications

References 19 publications

Development of Electrochromic Devices, Based on Polymeric Gel, for Energy Saving Applications

Development of Electrochromic Devices, Based on Polymeric Gel, for Energy Saving Applications

WO3 thin films grown on Si substrates: potential high Tc ferromagnetic semiconductors

Recent progress in Prussian blue electrode for electrochromic devices

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