Year-end Sale % OFF 
Abstract
Electrochromic windows can darken on demand to limit the solar gains entering a building to reduce the risk of overheating, while preserving the view towards the exterior. Yet, the switching speed and contrast as well as the durability of commercial products still need to be improved. Novel materials are investigated to address these shortcomings. Since gel or polymer electrolytes limit the durability of electrochromic glazing, all-solid state, inorganic devices are considered. The optical properties of doped nickel oxides were studied in order to obtain a color neutral anodic electrochromic oxide. The addition of tantalum was shown to increase the light transmittance and to provide a coating with better color neutrality compared to nickel vanadium oxides. The study of the crystalline structure by X-ray diffraction suggests that a nickel oxide-tantalum pentoxide nanocomposite is formed. These results are encouraging to use nickel tantalum oxide as an anodic electrochromic oxide.
Highlights
Glazed buildings require a method to control the solar gains in order to prevent overheating
Tungsten trioxide is commonly used as a cathodic electrochromic oxide, varying from transparent to dark blue, and nickel oxides are commonly used as an anodic electrochromic oxide, varying from brown to yellow
In this work, we report the spectral transmittance of nickel-vanadium and nickel-tantalum oxides at various lithiation levels
Summary
Glazed buildings require a method to control the solar gains in order to prevent overheating. Electrochromic windows are able to modulate the solar gains entering a building by varying their spectral transmittance in the solar range [1] They preserve the view toward the exterior, their switching is silent and no mechanical parts are required. They still suffer from limitations in terms of durability, switching speed and color neutrality. Nickel-vanadium oxides are often used for coatings deposited by magnetron sputtering due to the non-magnetic nature of the Ni-V target They often exhibit a strong yellow color and this has an impact on the color neutrality of the electrochromic window in the clear state. The addition of tantalum is expected to improve the color neutrality of the anodic electrochromic oxide
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
