Composition

1. 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 of the formula

or, where “#” represents the connecting point to group Y,

Y is a (poly)alkoxylene group of the formula:

and “*” represents the connecting point to groups X and Z;

Z is —[(CHR 1 ) n -Q)] x —R 3

wherein n is 2, Q is an oxygen atom, nitrogen atom or sulfur atom, R 1 is H, R 3 is a methyl group, x is an integer that is 1 to 100,

and wherein the second material is selected from one or more members of the group consisting of a poly(meth)acrylate or a (meth)acrylate monomer.

2. The composition according to claim 1 , wherein the core comprises one element of the group 13 of the periodic table, and one element of the group 15 of the periodic table a.

3. The composition according to claim 1 , wherein at least one of the shell layers comprises a 1 st element of group 12 of the periodic table, and a 2 nd element of group 16 of the periodic table.

4. The composition according to claim 1 , wherein at least one shell layer is represented by following formula (II),

ZnS x Se y Te z ,  (II)

wherein 0≤x≤1, 0≤y≤1, 0≤z≤1, and x+y+z=1.

5. The composition according to claim 1 , wherein said shell layers of the semiconducting light emitting nanoparticle are double shell layers.

6. The composition according to claim 1 , wherein the composition further comprises at least one additional material, selected from the group consisting of organic light emitting materials, inorganic light emitting materials, charge transporting materials, scattering particles, optically transparent polymers, anti-oxidants, radical quenchers, polymerization initiators, and additional ligands.

7. The composition according to claim 1 , wherein the composition comprises a plurality of semiconducting light emitting nanoparticles.

8. The composition according to claim 1 , wherein the total amount of the semiconducting light emitting nanoparticle is in the range from 0.1 wt. % to 90 wt. % based on the total amount of the composition.

9. The composition according to claim 1 , wherein x is 1-8.

10. A formulation comprising at least the composition according to claim 1 and

at least one solvent.

11. An electronic device, optical device, or a biomedical device comprising a composition according to claim 1 .

12. An optical medium comprising at least said composition according to claim 1 .

13. An optical device comprising at least one optical medium according to claim 12 .