Assessment of the long-term performance of partly covered photoelectrochromic devices under insolation and in storage

Dokouzis, Alexandros; Theodosiou, Krystallia; Leftheriotis, G.

doi:10.1016/j.solmat.2018.03.039

Cited by 17 publications

(23 citation statements)

References 51 publications

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“…This means that coloration kinetics observed in lab-scale cells might also be observed in large-area windows. The same group investigated the durability and stability of PECDs, in different operating conditions [97], providing possible explanations degradation mechanisms and proposing a loss mechanism, [92]; the solid state of the electrolyte undoubtedly affected the slower coloration kinetics (15 min.). For the first time in PECDs' studies, a current-voltage characteristic curve was reported, envisaging, at last, the challenging idea to employ PECDs for smart solar control as well as PV conversion (η was, anyway, as low as 0.054%).…”

Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

“…This means that coloration kinetics observed in lab-scale cells might also be observed in large-area windows. The same group investigated the durability and stability of PECDs, in different operating conditions [97], providing possible explanations degradation mechanisms and proposing a loss mechanism, including the reaction of electrons with tri-iodide ions at the interface between the cathodic EC material and the electrolyte. They also found that a 35 nm thin ZnS film, evaporated by e-beam deposition on top of WO 3 , suppressed contrast losses, acting as an effective barrier [98].…”

Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

“…They found that devices embodying the PhmEDOT thin film reported faster kinetics and higher contrast (∆T = 21%) as compared to the one embodying a PEDOT thin film (∆T = 13%). Dokouzis et al reported further works on PECDs, recently, using cobalt redox electrolytes [100] and studying the long term performance, exposing them to insolation in short-circuit and open-circuit conditions [97]. Theodosiou et al fabricated electrolytes with different concentrations of PMMA, having a ionic conductivity in the order of 10 −5 S/cm, which decreased if the PMMA increased [98].…”

Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

See 2 more Smart Citations

The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices

et al. 2020

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This paper holds a critical review of current research activities dealing with smart architectural glazing worldwide. Hereafter, the main trends are analyzed and critically reported, with open issues, challenges, and opportunities, providing an accurate description of technological evolution of devices in time. This manuscript deals with some well-known, highly performing technologies, such as semitransparent photovoltaics and novel photoelectrochromic devices, the readiest, probably, to reach the final stage of development, to disclose the manifold advantages of multifunctional, smart glazing. The complex, overall effects of their building integration are also reported, especially regarding energy balance and indoor visual comfort in buildings.

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Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

“…This means that coloration kinetics observed in lab-scale cells might also be observed in large-area windows. The same group investigated the durability and stability of PECDs, in different operating conditions [97], providing possible explanations degradation mechanisms and proposing a loss mechanism, including the reaction of electrons with tri-iodide ions at the interface between the cathodic EC material and the electrolyte. They also found that a 35 nm thin ZnS film, evaporated by e-beam deposition on top of WO 3 , suppressed contrast losses, acting as an effective barrier [98].…”

Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

Section: A Chronological Review Of Pecdsmentioning

confidence: 99%

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The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices

et al. 2020

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“…In addition, electrochromic materials are very significant for ECDs. Transition metal oxide WO 3 [28][29][30] has been widely studied due to its excellent electrochemical and electrochromic properties. With the intercalating of metal cation, W 6+ is reduced to W 5+ and W 4+ , causing the color to change from colorless to blue.…”

Section: Introductionmentioning

confidence: 99%

A Solar-Driven Flexible Electrochromic Supercapacitor

et al. 2020

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Solar-driven electrochromic smart windows with energy-storage ability are promising for energy-saving buildings. In this work, a flexible photoelectrochromic device (PECD) was designed for this purpose. The PECD is composed of two flexible transparent conductive layers, a photocatalytic layer, an electrochromic material layer, and a transparent electrolyte layer. The photocatalytic layer is a dye-sensitized TiO2 thick film and the electrochromic layer is a WO3 thin film, which also possesses a supercapacitive property. Under illumination, dye-sensitized TiO2 thick film realizes photo-drive electrochromism that the WO3 changes from colorless to blue with large optical modulation. Meanwhile, the PECD has an electrochemical supercapacitance showing an energy storage property of 21 mF·cm−2 (114.9 F·g−1 vs the mass of WO3), stable mechanical performance and long cycle performance. The PECD can effectively adjust the transmittance of visible and near-infrared light without any external power supply, realizing zero energy consumption, and can convert solar energy into electrical energy for storage.

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“…Among all electrochromic materials, WO 3 is considered to have the best overall performance, due to its high coloration efficiency, good cycling life and fast switching time. On the other hand, the majority of the rest of the widely studied cathodic EC materials have shown either low coloration efficiency, or poor durability over electrochemical cycling [ 6 , 11 , 12 , 13 , 14 ]. The electrochemical reduction that leads to the coloration of WO 3 can be written as:

which A + refers to H + , Li + , Na + ;…”

Section: Introductionmentioning

confidence: 99%

Quasi-Solid-State Electrochromic Cells with Energy Storage Properties Made with Inkjet Printing

et al. 2020

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In common commercially available electrochromic glass panes, the active materials such as WO3 and NiOx films are typically deposited by either physical vapor or sputtering under vacuum. In the present studies, we report on the inkjet printing method to deposit both electrochromic and ion storage electrode layers under ambient conditions. An ion storage layer based on cerium modified TiO2 and electrochromic nanocrystalline WO3 were both prepared under the wet method and deposited as inks on conductive substrates. Both compounds possess porous morphology facilitating high ion diffusion during electrochemical processes. In particular, the ion storage layer was evaluated in terms of porosity, charge capacity and ion diffusion coefficient. A scaled up 90 cm2 electrochromic device with quasi-solid-state electrolyte was made with the aforementioned materials and evaluated in terms of optical modulation in the visible region, cyclic voltammetry and color efficiency. High contrast between 13.2% and 71.6% for tinted and bleached states measured at 550 nm was monitored under low bias at +2.5 volt and −0.3 volts respectively. Moreover, the calculated energy density equal to 1.95 × 10−3 mWh cm−2 and the high areal capacitance of 156.19 mF cm−2 of the device could combine the electrochromic behavior of the cell with energy storage capability so as to be a promising candidate for future applications into smart buildings.

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Assessment of the long-term performance of partly covered photoelectrochromic devices under insolation and in storage

Cited by 17 publications

References 51 publications

The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices

The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices

A Solar-Driven Flexible Electrochromic Supercapacitor

Quasi-Solid-State Electrochromic Cells with Energy Storage Properties Made with Inkjet Printing

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