Multicolor electrochromic structure, fabrication method and application thereof

A multicolor electrochromic structure, comprising a working electrode, an electrolyte and a counter electrode, the electrolyte being distributed between the working electrode and the counter electrode, and the working electrode comprising an electrochromic layer;

• wherein,
• the electrochromic layer comprises a first reflective surface and a second reflective surface which are arranged face to face in parallel;
• a single dielectric layer is arranged between the first reflective surface and the second reflective surface;
• the dielectric layer consists of only electrochromic material;
• the dielectric layer is arranged on a metal reflective layer, the first reflective surface is a first surface of the dielectric layer, the second reflective surface is a bonding interface between a second surface of the dielectric layer and the metal reflective layer, and the first surface is opposite to the second surface;
• the first reflective surface, the second reflective surface and the dielectric layer form a single optical cavity;
• and when incident light falls in the optical cavity, a phase shift of a reflected light formed on the first reflective surface and a reflected light formed on the second reflective surface is
• β
• ~
• =
• (
• 2
• ⁢
• π
• /
• λ
• )
• ⁢
• n
• ~
• 1
• ⁢
• d
• ⁢
• cos
• ⁢
• θ
• ~
• 1
• ;
• wherein, d is a thickness of the dielectric layer;
• ñ1 is a refractive index of the dielectric layer;
• λ is a wavelength of the incident light;
• {tilde over (θ)}1 is an angle of refraction when the incident light passes through the first reflective surface.