Electrochromic glazing

An electrochromic system comprising:

• a material comprising a substrate coated with a first conductive coating comprising, starting from the substrate:
• a first dielectric coating,
• a functional metal layer comprising a silver-based layer,
• a blocking layer located immediately in contact with the silver-based metal functional layer, selected from metal layers based on a metal or metal alloy, metal nitride layers, metal oxide layers and metal oxynitride layers of one or more elements selected from titanium, nickel, chromium, tantalum and niobium, aluminum oxide layers and silicon oxide layers,
• at least one zinc-based metal layer, located above or below the silver-based metal functional layer, directly in contact or separated by one or more layers whose total thickness is less than or equal to 20 nm,
• a second dielectric coating comprising at least one conductive oxide layer, a sum of the thicknesses of the conductive oxide layers in the second dielectric coating being greater than 30 nm,
• a first active layer comprising an electrochromic material,
• an electrolyte layer,
• a second active layer, and
• a second transparent electroconductive coating,
• optionally a substrate.