Luminescent composite comprising a polymer and a luminophore and use of this composite in a photovoltaic cell

A luminescent composite comprising:

• a polymer selected from ethylene/vinyl acetate (EVA), polyethylene terephthalate, ethylene tetrafluoroethylene, ethylene trifluorochloroethylene, perfluorinated ethylene-propylene, polyvinyl butyral and polyurethane;
• at least one inorganic phosphor based on at least one element selected from rare earth elements, zinc and manganese, wherein the inorganic phosphor has the following characteristics:
• an external quantum efficiency of greater than or equal to 40% for at least one excitation wavelength of between 350 nm and 440 nm;
• an absorption of less than or equal to 10% for a wavelength of greater than 440 nm;
• a mean particle size d50 of less than 1 μm;
• a mean particle size d50 of at least 30 nm;
• and
• an emission maximum in a range of wavelengths between 440 nm and 900 nm.