Patent ID: 8480928

Claim:
A composite composite luminophore comprising an inorganic matrix and an organic fluorescent dye, wherein the inorganic matrix is formed from an inorganic compound selected from the group consisting of sparingly soluble metal carbonates, sparingly soluble metal phosphates, sparingly soluble metal sulfates and mixtures thereof, wherein the inorganic compound in each case contains one or more metal cations which may be the same or different and are selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sc, Y, La, Ti, Zr, V, Nb, Ta, Zn, B, Al, Ga, In, Ge, Bi, Pb, the lanthanoids and combinations thereof, and wherein the organic fluorescent dye has one or more functional groups selected from the group consisting of hydroxyl groups, sulfate groups, phosphate groups, phosphonic acid groups, phosphinic acid groups, carboxylate groups, silicate groups, borate groups, and combinations thereof, by means of which the fluorescent dye is incorporated into the inorganic matrix.