Composition comprising nanosized light emitting material

1. A composition comprising at least one nanosized light emitting material and at least one compound represented by the following formula (1) or formula (2):

wherein

R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, identically or differently, selected from alkyl groups; and

Z is P, As or Sb.

2. The composition according to claim 1 , wherein

R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 are, identically or differently, selected from straight-chain alkyl groups having 1 to 30 C atoms and branched or cyclic alkyl groups having 3 to 30 C atoms.

3. The composition according to claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are, identically or differently, selected from straight-chain alkyl groups having 1 to 20 C atoms and branched alkyl groups having 3 to 20 C atoms, which may in each case be substituted by one or more groups selected from F, Cl, Br, I, CN, (—OC(O)CHCH 2 ) or (—OC(O)C(CH 3 )CH 2 ), aromatic groups having 5 to 20 aromatic ring atoms, and heteroaromatic groups having 5 to 20 aromatic ring atoms.

4. The composition according to claim 1 , wherein at least one of R 1 , R 2 , and R 3 and at least one of R 4 , R 5 and R 6 is substituted by one or more —OC(O)CHCH 2 and/or —OC(O)C(CH 3 )CH 2 groups.

5. The composition according to claim 1 , wherein Z is P.

6. The composition according to claim 1 , wherein the composition comprises at least one compound of formula (1).

7. The composition according to claim 1 , wherein the nanosized light emitting material has an inorganic part and the total amount of the compound of formula (1) and/or (2) in the composition is in the range from 1 wt.-% to 40 wt.-%, based on the inorganic part of the nanosized light emitting material.

8. The composition according to claim 7 , wherein the total amount of the compound of formula (1) and/or (2) in the composition is in the range from 4 wt.-% to 32 wt.-% based on the inorganic part of the nanosized light emitting material.

9. The composition according to claim 1 , further comprising a surface modifying ligand attached to a surface of the at least one nanosized light emitting material, said ligand being represented by the following formula (3) or formula (4):

R 9 —SH  formula (3)

R 10 —(CH 2 ) n —SH  formula (4)

wherein

R 9 is selected from straight-chain alkyl groups having 1 to 40 C atoms, branched or cyclic alkyl groups having 3 to 40 C atoms, and alkenyl or alkynyl groups having 2 to 40 C atoms;

R 10 is selected from aromatic or heteroaromatic groups having 5 to 30 aromatic ring atoms, which may in each case be substituted by one or more groups selected from F, Cl, Br, I, CN, straight-chain alkyl groups having 1 to 20 C atoms and alkoxy groups having 1 to 20 C atoms; and

n is 0 to 16.

10. The composition according to claim 1 , wherein the composition further comprises additives selected from organic light emitting materials, inorganic light emitting materials, charge transporting materials, scattering particles, host materials, nanosized plasmonic particles, photo initiators, and matrix materials.

11. The composition according to claim 1 , wherein the composition comprises at least one compound of formula (2).

12. A formulation comprising the composition according to claim 1 and at least one solvent.

13. A formulation according to claim 12 , wherein said at least one solvent is selected from aromatic solvents, halogenated solvents, aliphatic hydrocarbons solvents, and mixtures thereof.

14. A formulation according to claim 12 , wherein said at least one solvent is selected toluene, xylene, ethers, tetrahydrofuran, chloroform, dichloromethane, heptane, and mixtures thereof.

15. A process for manufacturing an optical medium comprising using a composition according to claim 1 .

16. An electronic device, an optical device or a biomedical device containing a composition according to claim 1 .

17. An optical medium comprising a composition according to claim 1 .

18. An optical device comprising an optical medium according to claim 17 .