Luminous laminated glass panel comprising a functional coating

A material comprising a substrate coated with a functional coating comprising, starting from the substrate:

• optionally a first dielectric coating below the functional layer comprising:
• a layer with higher refractive index with an optical thickness of between 0 and 110 nm, and
• a layer with lower refractive index with an optical thickness of between 0 nm and 170 nm,
• the layer with higher refractive index of the optional first dielectric coating, has a higher refractive index than the layer with lower refractive index of the optional first dielectric coating, and the refractive index variation at 550 nm between these two layers is greater than 0.25,
• a functional layer based on a transparent conductive oxide,
• a second dielectric coating located above the functional layer comprising:
• a layer with higher refractive index with an optical thickness of between 80 and 170 nm, and
• a layer with lower refractive index with an optical thickness of between 80 and 190 nm,
• the layer with higher refractive index of the second dielectric coating has a refractive index greater than that of the layer with lower refractive index of the second dielectric coating and the refractive index variation at 550 nm between these two layers is greater than 0.25,
• a sum of optical thicknesses of the optional first dielectric coating and the second dielectric coating is greater than 200 nm.