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Method and Performance Study of Preparing Electrochromic Devices by Screen Printing Technology.

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Title: Method and Performance Study of Preparing Electrochromic Devices by Screen Printing Technology.
Authors: Taolin Zhang1, Zhicheng Sun1 sunzhicheng@bigc.edu.cn, Ting Wang1, Rui Ma1, Siying Guan1, Ruping Liu1
Source: Journal of Imaging Science & Technology. May/Jun2025, Vol. 69 Issue 3, p1-7. 7p.
Subjects: Electrochromic devices, Screen process printing, Optical modulation, Tungsten trioxide, Flexible display systems
Abstract: Electrochromic devices possess a sandwich-like structure and can change their color by changing their optical properties such as absorbance and transmittance through the application of voltage. It is currently a hotspot in the field of electrochemical display research and has significant applications in wearable electronics, response sensors, and flexible displays. This study uses tungsten trioxide (WO3) as the cathode color-changing material, zinc foil as anode, and a water-based ink prepared by mixing nano-WO3, solvent, and polyvinylpyrrolidone (PVP) as the thickener in a predetermined ratio to meet the viscosity, surface tension, and particle size requirements of screen printing. The WO3 ink is then transferred onto a fluorine-doped tin oxide (FTO)-coated conductive glass through screen printing, and after sintering at 500°C, the color-changing layer is encapsulated with VHB tape to obtain an electrochromic device with two electrodes. The properties of the ink at different PVP addition amounts, the morphology of the prepared films, and the performance of the devices were characterized by laser confocal microscope, scanning electron microscope (SEM), viscosity rheometer, surface tension and contact angle tester, fiber spectrometer, and an electrochemical workstation. The results showed that when isopropanol and deionized water were used as solvents, and 8 wt.% PVP as the thickener; the electrochromic device made after sintering had good transparency and could achieve an optical modulation rate of 55.9% within 36 s. This work can significantly impact the industrial application of large-area, low-cost intelligent windows using screen printing technology. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Imaging Science & Technology is the property of International Society for Imaging Science & Technology and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Method and Performance Study of Preparing Electrochromic Devices by Screen Printing Technology.
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  Data: <searchLink fieldCode="AR" term="%22Taolin+Zhang%22">Taolin Zhang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhicheng+Sun%22">Zhicheng Sun</searchLink><relatesTo>1</relatesTo><i> sunzhicheng@bigc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Ting+Wang%22">Ting Wang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rui+Ma%22">Rui Ma</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Siying+Guan%22">Siying Guan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ruping+Liu%22">Ruping Liu</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Imaging+Science+%26+Technology%22">Journal of Imaging Science & Technology</searchLink>. May/Jun2025, Vol. 69 Issue 3, p1-7. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Electrochromic+devices%22">Electrochromic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Screen+process+printing%22">Screen process printing</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+modulation%22">Optical modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Tungsten+trioxide%22">Tungsten trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Flexible+display+systems%22">Flexible display systems</searchLink>
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  Label: Abstract
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  Data: Electrochromic devices possess a sandwich-like structure and can change their color by changing their optical properties such as absorbance and transmittance through the application of voltage. It is currently a hotspot in the field of electrochemical display research and has significant applications in wearable electronics, response sensors, and flexible displays. This study uses tungsten trioxide (WO3) as the cathode color-changing material, zinc foil as anode, and a water-based ink prepared by mixing nano-WO3, solvent, and polyvinylpyrrolidone (PVP) as the thickener in a predetermined ratio to meet the viscosity, surface tension, and particle size requirements of screen printing. The WO3 ink is then transferred onto a fluorine-doped tin oxide (FTO)-coated conductive glass through screen printing, and after sintering at 500°C, the color-changing layer is encapsulated with VHB tape to obtain an electrochromic device with two electrodes. The properties of the ink at different PVP addition amounts, the morphology of the prepared films, and the performance of the devices were characterized by laser confocal microscope, scanning electron microscope (SEM), viscosity rheometer, surface tension and contact angle tester, fiber spectrometer, and an electrochemical workstation. The results showed that when isopropanol and deionized water were used as solvents, and 8 wt.% PVP as the thickener; the electrochromic device made after sintering had good transparency and could achieve an optical modulation rate of 55.9% within 36 s. This work can significantly impact the industrial application of large-area, low-cost intelligent windows using screen printing technology. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Imaging Science & Technology is the property of International Society for Imaging Science & Technology and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.2352/J.ImagingSci.Technol.2025.69.3.030408
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      – Code: eng
        Text: English
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        PageCount: 7
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      – SubjectFull: Electrochromic devices
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      – SubjectFull: Optical modulation
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      – SubjectFull: Tungsten trioxide
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      – SubjectFull: Flexible display systems
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      – TitleFull: Method and Performance Study of Preparing Electrochromic Devices by Screen Printing Technology.
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            NameFull: Taolin Zhang
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            NameFull: Zhicheng Sun
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            NameFull: Rui Ma
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              Text: May/Jun2025
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