Ink composition and electronic device including film formed using the ink composition

Patent metadata

Field	Value
Publication number	US-12516211-B2
Application number	US-202217721123-A
Country	US
Kind code	B2
Filing date	Apr 14, 2022
Priority date	Sep 15, 2021
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

An ink composition includes: a quantum dot including one or more ligands on a surface thereof; a first monomer including one or more epoxy groups; and a second monomer including one or more oxetane groups, wherein the one or more ligands include one or more polar moieties. An electronic apparatus includes a film formed utilizing the ink composition.

First claim

What is claimed is:

1 . An ink composition comprising:
a quantum dot comprising one or more ligands on a surface thereof; a first monomer comprising one or more epoxy groups; a second monomer comprising one or more oxetane groups; and a third monomer comprising one or more epoxy groups, wherein, the one or more ligands comprise one or more polar moieties, the first monomer is represented by Formula 1-1, the third monomer is represented by Formula 1-2, and the third monomer is about 20 parts by weight to about 500 parts by weight in amount based on 100 parts by weight of the first monomer:

and
wherein, in Formulae 1-1 and 1-2,
A 11 is a linear or branched C 1 -C 20 alkyl group or a linear or branched C 1 -C 20 alkenyl group,
A 12 is a cyclic C 1 -C 20 alkyl group or a cyclic C 1 -C 20 alkenyl group,
L 11 is

*—O—*′, or

a11 is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,
R 11 to R 15 are each independently hydrogen, deuterium, a halogen, or a linear, branched, or cyclic C 1 -C 20 alkyl group,
b11 is an integer from 1 to 12,
n11 is 1, 2, 3, 4, or 5, and
* and *′ each indicate a binding site to a neighboring atom.

2 . The ink composition of claim 1 , wherein the first monomer comprises 1, 2, 3, 4, or 5 epoxy groups, and the second monomer comprises 1, 2, 3, 4, or 5 oxetane groups.

3 . The ink composition of claim 1 , wherein the second monomer is represented by Formula 2-1 or Formula 2-2:

and
wherein, in Formulae 2-1, and 2-2,
A 21 is a linear, branched, or cyclic C 1 -C 20 alkyl group; a linear, branched, or cyclic alkenyl group; or a C 6 -C 20 aryl group,
A 22 is a cyclic C 1 -C 20 alkyl group or a cyclic C 1 -C 20 alkenyl group,
L 21 is

*—O—*′, or

a21 is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,
R 21 to R 27 are each independently hydrogen, deuterium, a halogen, or a linear, branched, or cyclic C 1 -C 20 alkyl group,
b21 is an integer from 1 to 12,
n21 is 1, 2, 3, 4, or 5, and
* and *′ each indicate a binding site to a neighboring atom.

4 . The ink composition of claim 1 , wherein an amount of the first monomer is, based on 100 parts by weight of the ink composition, about 20 parts or more by weight and less than about 70 parts by weight, and an amount of the second monomer is, based on 100 parts by weight of the ink composition, about 5 parts or more by weight and less than about 90 parts by weight.

5 . The ink composition of claim 1 , wherein an amount of the second monomer is, based on 100 parts by weight of the first monomer, in a range of about 20 parts by weight to about 350 parts by weight.

6 . The ink composition of claim 1 , wherein the ink composition has a viscosity of 80 mPa's or less at 25° C.

7 . The ink composition of claim 1 , wherein the one or more polar moieties comprise an oxyalkylene group.

8 . The ink composition of claim 1 , wherein the one or more ligands and the quantum dot are chemically bonded via at least one group selected from the group consisting of a hydroxy group, a mercapto group, a carboxyl group, an ester group, and a phosphoric acid group.

9 . The ink composition of claim 1 , wherein the one or more ligands comprise a linear, branched, or cyclic C 1 -C 20 alkyl group; a linear, branched, or cyclic C 1 -C 20 alkenyl group; a C 6 -C 20 aryl group; or a C 1 -C 20 heteroaryl group.

10 . The ink composition of claim 1 , further comprising a polymerization initiator, wherein the polymerization initiator comprises sulfonium or iodonium.

11 . The ink composition of claim 1 , wherein the ink composition further comprises a solvent in an amount of less than 2 parts by weight based on 100 parts by weight of the ink composition.

12 . An electronic apparatus comprising:
a film formed utilizing the ink composition of claim 1 ; and a light-emitting device comprising a first electrode, a second electrode, and an interlayer between the first electrode and the second electrode.

13 . The electronic apparatus of claim 12 , wherein the film is outside the light-emitting device and in a traveling direction of light emitted from the light-emitting device.

14 . The electronic apparatus of claim 13 , wherein a first region of the film comprises the quantum dot, and
the quantum dot is to absorb a first-color light and emit a second-color light.

15 . The electronic apparatus of claim 14 , wherein the film further comprises a second region distinct from the first region, and the second region comprises a scatterer, and does not comprise the quantum dot.

16 . The electronic apparatus of claim 12 , wherein the interlayer comprises the film.

17 . The electronic apparatus of claim 12 , further comprising a thin-film transistor, wherein
the thin-film transistor comprises a source electrode and a drain electrode, and the first electrode of the light-emitting device is electrically connected to the source electrode or the drain electrode of the thin-film transistor.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Joonhyung

Classifications

• C09K11/06

  containing organic luminescent materials · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• H10K2102/331

  Nanoparticles used in non-emissive layers, e.g. in packaging layer · CPC title

• H10K50/854

  comprising scattering means · CPC title