| 摘要 |
<p>The electrochromic element comprises an electrochromic layer (22) whose transmission properties change when a voltage difference is applied across the element. Said electrochromic layer (22) comprises a first metal oxide of the group formed by WO3, MoO3, Nb2O5, MnO2 and ZrO2 (and combinations thereof) and a second metal oxide containing V2O5, TiO2 and/or ZnO. If the concentration of the second metal in the mixture ranges from 1 to 15 at. %, preferably from 3 to 10 at. %, the electrochromic layer (22) is transparent and colorless if no guest atoms are incorporated in the layer, and it is (color neutral) grey if a substantial concentration of guest atoms is incorporated in the layer. Electrochromic elements are provided, for example, on the outer surface of a display screen of a display device.</p> |
