Optically active coating for improving the yield of photosolar conversion

An optically active coating for improving a yield of photosolar conversion, comprising:

• a transparent matrix including a plurality of optically active components absorbing light energy in a first absorption wavelength lambdaA1 and re-emitting the energy in a second wavelength lambdaR1 which is different from lambdaA1;
• the optically active components being selected such that the re-emission wavelength lambdaR1 of at least one type of component corresponds to the absorption wavelength lambdaR2 of at least one second type of component, a C2/C1 ratio of concentration C1 of the optically active components of the first type in relation to the concentration C2 of the optically active components of the second type is comprised between 0.13 and 0.26, Ci designating the concentration in moles per liter of the component i in relation to a doped matrix;
• and
• optically active molecules included in a micronised and/or powdered matrix of light-cascade doped PMMA, and then mixed into EVA granules.