A composition comprising at least one semiconducting light emitting nanoparticle comprising at least a core, optionally one or more shell layers, a first material, and a second material, wherein the first material is represented by following chemical formula (I); XYZ - (I) wherein X represents an attaching group comprising one or two S atoms, preferably said attaching group is more preferably or where "#" represents the connecting point to group Y, and "*" represents the connecting point to the surface of the core or the outermost surface of the shell layers of the semiconducting light emitting nanoparticle; Y is a single bond, an alkylene group having 1 to 15 carbon atoms, or an alkenylene group having 1 to 15 carbon atoms, or (poly)alkoxylene group having 1 to 15 carbon atoms, preferably Y is an (poly)alkoxylene group having 1 to 15 carbon atoms; Z is -[CH(R 1 )-CH(R 2 )-Q] x -R 3 , wherein R 1 is H or a methyl group, R 2 is H or a methyl group, Q is an oxygen atom, nitrogen atom or sulfur atom, preferably Q is an oxygen atom, R 3 is H or a methyl group, x is an integer, preferably x is in the range from 1 to 300, more preferably from 2 to 200, even more preferably from 4 to 100; or Z is -[(CHR 1 ) n -Q)] x -R 3 wherein n is 2 or 3, Q is an oxygen atom, nitrogen atom or sulfur atom, preferably Q is an oxygen atom, R 1 is H or a methyl group, R 3 is H or a methyl group, n is 1 to 5, preferably 1 to 3, more preferably n is 2, x is an integer, preferably x is in the range from 1 to 300, more preferably from 2 to 200, even more preferably from 4 to 100; wherein said second material is a matrix material selected from one or more members of the group consisting of poly-(meth)acrylate, a (meth)acrylate monomer, silicon polymers, epoxy polymers, preferably said matrix material is an acrylate monomer, methacrylate monomer, poly-acrylate, a poly-methacrylate, or a mixture of thereof. wherein the first material is represented by following chemical formula (I); XYZ - (I) wherein X represents an attaching group comprising one or two S atoms, preferably said attaching group is more preferably or where "#" represents the connecting point to group Y, and "*" represents the connecting point to the surface of the core or the outermost surface of the shell layers of the semiconducting light emitting nanoparticle; Y is a single bond, an alkylene group having 1 to 15 carbon atoms, or an alkenylene group having 1 to 15 carbon atoms, or (poly)alkoxylene group having 1 to 15 carbon atoms, preferably Y is an (poly)alkoxylene group having 1 to 15 carbon atoms; Z is -[CH(R 1 )-CH(R 2 )-Q] x -R 3 , wherein R 1 is H or a methyl group, R 2 is H or a methyl group, Q is an oxygen atom, nitrogen atom or sulfur atom, preferably Q is an oxygen atom, R 3 is H or a methyl group, x is an integer, preferably x is in the range from 1 to 300, more preferably from 2 to 200, even more preferably from 4 to 100; or Z is -[(CHR 1 ) n -Q)] x -R 3 wherein n is 2 or 3, Q is an oxygen atom, nitrogen atom or sulfur atom, preferably Q is an oxygen atom, R 1 is H or a methyl group, R 3 is H or a methyl group, n is 1 to 5, preferably 1 to 3, more preferably n is 2, x is an integer, preferably x is in the range from 1 to 300, more preferably from 2 to 200, even more preferably from 4 to 100; wherein said second material is a matrix material selected from one or more members of the group consisting of poly-(meth)acrylate, a (meth)acrylate monomer, silicon polymers, epoxy polymers, preferably said matrix material is an acrylate monomer, methacrylate monomer, poly-acrylate, a poly-methacrylate, or a mixture of thereof. <EOS>