Composition comprising semiconducting light emitting nanoparticles
A method of manufacturing a composition with improved quantum yield, containing at least these steps: a/ manufacturing a mixture by at least these steps: 1/ providing a semiconducting light emitting nanoparticle, 2/ adding a macromolecular compound comprising at least an anchoring group; 3/ adding an organic additive, and b/ subjecting the mixture from step a/ to irradiation with light of a wavelength in the range of 300 to 600 nm having an intensity in the range of 0.025 to 1 W/cm 2 to obtain the composition; wherein the organic additive is defined by formula (Ia): M-(X—Y) 2 , wherein M is a divalent metal ion, X is a hydrocarbon chain, and Y is a functional group.
1. A method of manufacturing a composition with improved quantum yield, comprising at least these steps:
a/ manufacturing a mixture by at least these steps:
1/ providing a semiconducting light emitting nanoparticle,
2/ adding a macromolecular compound comprising at least an anchoring group;
3/ adding an organic additive,
and
b/ subjecting the mixture from step a/ to irradiation with light of a wavelength selected from a range of 300 to 600 nm having an intensity in the range from 0.025 to 1 W/cm2 to obtain the composition;
wherein the organic additive is defined by formula (Ia)
M-(X—Y) 2 (Ia)
wherein
M is a divalent metal ion,
X is a hydrocarbon chain, and
Y is a functional group.
2. The method according to claim 1 , wherein at least one of the following applies:
a) M is selected from the group consisting of Zn 2+ , Mg 2+ and Cd 2+ ; and
b) Y is a carboxylate, carbamate, xanthate, phosphonate, phosphate, thiolate,
or a combination of two or more thereof.
3. The method according to claim 1 , wherein the organic additive is defined by formula (II),
wherein
M is selected from the group consisting of Zn 2+ , Mg 2+ and Cd 2+ ;
R 1 and R 2 can be same or different, linear or branched, and each R 1 and R 2 is selected from the group consisting of an alkyl having a chain of 1 to 16 carbons atoms and an alkenyl group having a chain of 1 to 15 carbon atoms.
4. The method according to claim 1 , wherein the organic additive comprises a Zinc carboxylate.
5. The method according to claim 1 , wherein the at least one anchoring group of the macromolecular compound is ionic.
6. The method according to claim 1 , wherein the at least one anchoring group of the macromolecular compound is a phosphine group, phosphine oxide group, phosphate group, phosphonate group, thiol group, tertiary amine, carboxyl group, hetero cyclic group, silane group, sulfonic acid, hydroxyl group or a combination of two or more thereof.
7. The method according to claim 1 , wherein the macromolecular compound has a number average molecular weight of at least 1,000 g/mol.
8. The method according to claim 1 , wherein the macromolecular compound is based on a copolymer.
9. The method according to claim 8 , wherein the copolymer is selected from the group consisting of graft copolymer, block copolymer, alternating copolymer, and random copolymer.
10. The method according to claim 1 , wherein the macromolecular compound comprises at least one acrylate.
11. The method according to claim 1 , wherein the composition further comprises an organic phase.
12. The method according to claim 1 , consisting of these steps:
a/ manufacturing a mixture by at least these steps:
1/ providing a semiconducting light emitting nanoparticle,
2/ adding a macromolecular compound comprising at least an anchoring group;
3/ adding an organic additive, and
b/ subjecting the mixture from step a/ to irradiation with light of a wavelength selected from a range of 300 to 600 nm having an intensity in the range from 0.025 to 1 W/cm 2 to obtain the composition.