Producing composite material from at least one phosphor and a polymer matrix useful for producing lighting means comprises synthesizing luminescent phosphor nanoparticles in ionic liquid, and polymerizing ionic liquid

Producing a composite material from at least one phosphor and a polymer matrix, comprises (a) carrying out microwave mediated in situ synthesis of luminescent phosphor nanoparticles in a polymerizable ionic liquid, and (b) polymerizing the polymerizable ionic liquid or (ai) evaporating the phosphor or a starting compound, (b1) gas phase depositing the phosphor as the luminescent nanoparticles in a polymerizable ionic liquid, and (c1) polymerizing the polymerizable ionic liquid. An independent claim is also included for the composite material produced by the above mentioned method.