INK COMPOSITIONS WITH HIGH QUANTUM DOT CONCENTRATIONS FOR DISPLAY DEVICES
Organic ligand-capped quantum dots and curable ink compositions containing the organic ligand-capped quantum dots are provided. Also provided are thin films formed from the ink compositions.
1 - 26 . (canceled)
27 . A photonic device comprising:
a photonic device substrate; and
a crosslinked polymer film on the photonic device substrate, the crosslinked polymer film comprising:
crosslinked polymer chains comprising polymerized di(meth)acrylate monomers or a combination of polymerized di(meth)acrylate monomers and mono(meth)acrylate monomers;
a diluent comprising a polyether group and a crosslinkable group; and
quantum dots with hydrophilic ligands bound to their surfaces, wherein the hydrophilic ligands comprise ester ligands, ether ligands, or a combination of ester ligands and ether ligands.
28 . The photonic device of claim 27 , wherein the device substrate is a light guide plate and the photonic device is a liquid crystal display device.
29 . The photonic device of claim 27 , wherein the crosslinked polymer film is in a sub-pixel cell of a color filter and the photonic device is a liquid crystal display device.
30 . The photonic device of claim 27 , wherein the hydrophilic ligands comprise polydentate ligands having two or more head groups bound to the surface of a quantum dot.
31 . The photonic device of claim 27 , wherein the polydentate ligands are bidentate ligands having two head groups bound to the surface of a quantum dot.
32 . The photonic device of claim 27 , wherein the head groups comprise carboxylate groups.
33 . The photonic device of claim 27 , wherein the hydrophilic ligands comprise ligand backbone chains, the ligand backbone chains comprising from 16 to 24 carbon atoms.
34 . The photonic device of claim 27 , wherein the hydrophilic ligands comprise tail groups that are crosslinkable with the (meth)acrylate monomer.
35 . The photonic device of claim 27 , wherein the tail groups comprise maleimide groups.
36 . The photonic device of claim 34 , wherein the tail groups comprise acrylate groups.
37 . The photonic device of claim 34 , wherein the tail groups comprise methacrylate groups.
38 . The photonic device of claim 34 , wherein the tail groups comprise styrene groups.
39 . The photonic device of claim 27 , wherein the tail groups comprise alkylene oxide groups.
40 . The photonic device of claim 39 , wherein the alkylene oxide groups comprise ethylene oxide groups or propylene oxide groups.
41 . The photonic device of claim 27 , wherein the crosslinkable group of the diluent comprises a maleimide group, a norbornene group, or a combination thereof.
42 . A method of forming a quantum dot-containing film on a device substrate, the method comprising:
inkjet printing a layer of a curable ink composition on the surface of a device substrate, the ink composition comprising:
di(meth)acrylate monomers or a combination of di(meth)acrylate monomers and mono(meth)acrylate monomers;
a diluent comprising a polyether group and a crosslinkable group;
a multifunctional (meth)acrylate crosslinking agent comprising at least three acrylate functionalities; and
quantum dots with hydrophilic ligands bound to their surfaces, wherein the hydrophilic ligands comprise ester ligands, ether ligands, or a combination of ester ligands and ether ligands; and
curing the curable ink composition.
43 . The method of claim 42 , wherein the ink composition comprises:
30 wt. % to 96 wt. % of the (meth)acrylate monomer;
1 wt. % to 10 wt. % of the diluent comprising a polyether group and a crosslinkable group;
3 wt. % to 10 wt. % of the multifunctional (meth)acrylate crosslinking agent; and
wt. % to 50 wt. % of the quantum dots with the hydrophilic ligands bound to their surfaces.
44 . The method of claim 42 , wherein the hydrophilic ligands comprise tail groups that are crosslinkable with the (meth)acrylate monomer.
45 . The method of claim 44 , further comprising crosslinking the tail groups of the hydrophilic ligands with (meth)acrylate groups of the (meth)acrylate monomer.
46 . An ink composition comprising:
di(meth)acrylate monomers or a combination of di(meth)acrylate monomers and mono(meth)acrylate monomers;
a diluent comprising a polyether group and a crosslinkable group;
a multifunctional (meth)acrylate crosslinking agent comprising at least three acrylate functionalities; and
quantum dots with hydrophilic ligands bound to their surfaces, wherein the hydrophilic ligands comprise ester ligands, ether ligands, or a combination of ester ligands and ether ligands.