Layered structures and electronic devices including the same

Patent metadata

Field	Value
Publication number	US-11046885-B2
Application number	US-201816223186-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Dec 18, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A layered structure including a photoluminescent layer including a quantum dot polymer composite; a light absorption layer disposed on the photoluminescent layer, the light absorption layer including an absorptive color-filter material; and a silicon containing layer disposed between the photoluminescent layer and the light absorption layer, wherein the quantum dot polymer composite includes a first polymer matrix and a plurality of quantum dots dispersed in the first polymer matrix, and the plurality of quantum dots absorb excitation light and emits light in a longer wavelength than the wavelength of the excited light; and the absorptive color-filter material is dispersed in a second polymer matrix, and the absorptive color-filter material absorbs the excitation light that passes through the photoluminescent layer and transmits the light emitted from the plurality of quantum dots and an electronic device including the same.

First claim

What is claimed is:

1. A layered structure, comprising
a photoluminescent layer comprising a quantum dot polymer composite;
a light absorption layer disposed on the photoluminescent layer, the light absorption layer comprising a second polymer matrix and an absorptive color-filter material dispersed in the second polymer matrix; and
a silicon containing layer disposed between the photoluminescent layer and the light absorption layer, and
a light transmitting substrate,
wherein the quantum dot polymer composite comprises a first polymer matrix and a plurality of quantum dots dispersed in the first polymer matrix, and the plurality of quantum dots are configured to absorb excitation light and to emit light in a longer wavelength than the wavelength of the excitation light,
the absorptive color-filter material is configured to absorb the excitation light that passes through the photoluminescent layer and transmits the light emitted from the plurality of quantum dots,
the quantum dot polymer composite comprises at least one repeating section configured to emit light having a predetermined wavelength,
the silicon containing layer does not comprise a quantum dot,
the silicon containing layer has a thickness of greater than or equal to 100 nanometers,
the silicon containing layer comprises a porous structure of a silicon oxide,
wherein the silicon containing layer has a refractive index of less than 1.45,
wherein the refractive index of the silicon containing layer is lower than each of a refractive index of the light absorption layer and a refractive index of the photoluminescent layer,
wherein the silicon containing layer has a first surface contacting the photoluminescent layer and a second surface opposite to the first surface, the light absorption layer is disposed directly on the second surface of the silicon containing layer, and the light transmitting substrate is disposed on the light absorption layer.

2. The layered structure of claim 1 , wherein the second polymer matrix does not comprise a thiol-ene polymer.

3. The layered structure of claim 1 , wherein
the light absorption layer has a first surface facing the photoluminescent layer and a second surface opposite to the first surface and
the layered structure comprises the light transmitting substrate disposed on the second surface of the light absorption layer.

4. The layered structure of claim 1 , wherein the silicon containing layer further comprises a crosslinked polymer.

5. The layered structure of claim 4 , wherein the repeating section comprises a first section configured to emit a first light and a second section configured to emit a second light that is different from the first light,
the light absorption layer is patterned to have a first absorption section and a second absorption section corresponding to the first section and the second section, respectively, and
the first absorption section is configured to transmit at least the first light and the second absorption section is configured to transmit at least the second light.

6. The layered structure of claim 1 , wherein the first polymer matrix comprises a cross-linked polymer, a carboxylic acid group-containing binder polymer, or a combination thereof.

7. The layered structure of claim 6 , wherein the cross-linked polymer comprises a thiolene resin, a cross-linked poly(meth)acrylate, a cross-linked polyurethane, a cross-linked epoxy resin, a cross-linked vinyl polymer, a cross-linked silicone resin, or a combination thereof.

8. The layered structure of claim 6 , wherein
the carboxylic acid group-containing binder polymer comprises
a linear copolymer of a monomer combination comprising a first monomer comprising a carboxylic acid group and a carbon-carbon double bond, a second monomer comprising a carbon-carbon double bond and a hydrophobic moiety and not comprising a carboxylic acid group, and optionally a third monomer comprising a carbon-carbon double bond and a hydrophilic moiety and not comprising a carboxylic acid group;
a multi-aromatic ring-containing polymer having a backbone structure in which two aromatic rings are bound to a quaternary carbon atom that is a constituent atom of another cyclic moiety in a main chain of the backbone structure, and including a carboxylic acid group (—COOH); or a combination thereof.

9. The layered structure of claim 1 , wherein the plurality of quantum dots comprise a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV element or compound, a Group compound, a Group I-II-IV-VI compound, or a combination thereof, based on the Periodic Table.

10. The layered structure of claim 1 , wherein the absorptive color-filter material comprises an inorganic pigment, an inorganic dye, an organic pigment, an organic dye, or a combination thereof.

11. The layered structure of claim 1 , wherein the second polymer matrix comprises a (meth)acrylic polymer, a thiolene polymer, a polyurethane, an epoxy polymer, a vinyl polymer, a silicone polymer, an imide polymer, or a combination thereof.

12. The layered structure of claim 1 , wherein the silicon containing layer comprises SiO x wherein x is 1 to 2, and the porous structure has silicon oxide micropores.

13. The layered structure of claim 1 , wherein the silicon containing layer comprises a porous silica layer and a first layer comprising a cross-linked polymer, wherein the porous silica layer is disposed directly on the first layer comprising the cross-linked polymer.

14. The layered structure of claim 1 , wherein an amount of the absorptive color-filter material is greater than or equal to about 10 wt % and less than or equal to about 90 wt %, based on a total weight of the absorptive color filter.

15. The layered structure of claim 1 , wherein the silicon containing layer comprises an organosilicon compound comprising a moiety represented by *—Si—O—Si—* wherein * is a linking portion with an adjacent atom, and the organosilicon compound comprises a silsesquioxane structural unit represented by (RSiO 3/2 ) n and having a cage structure, a ladder structure, a polymeric structure, or a combination thereof, wherein n is 1 to 20 and R is hydrogen, a C1 to C30 substituted or unsubstituted aliphatic moiety, a C3 to C30 substituted or unsubstituted alicyclic moiety, a C6 to C30 substituted or unsubstituted aromatic moiety, or a combination thereof.

16. The layered structure of claim 1 , wherein the refractive index of the silicon containing layer is in a range of from about 1.2 to about 1.3.

17. A layered structure, comprising
a photoluminescent layer comprising a quantum dot polymer composite;
a light absorption layer disposed on the photoluminescent layer, the light absorption layer comprising an absorptive color-filter material; and
a silicon containing layer disposed between the photoluminescent layer and the light absorption layer,
wherein the quantum dot polymer composite comprises a first polymer matrix and a plurality of quantum dots dispersed in the first polymer matrix, and the plurality of quantum dots are configured to absorb excitation light and to emit light in a longer wavelength than the wavelength of the excitation light; and
the absorptive color-filter material is dispersed in a second polymer matrix, and the absorptive color-filter material is configured to absorb the excitation light that passes through the photoluminescent layer and transmits the light emitted from the plurality of quantum dots, wherein the silicon containing layer comprises an organosilicon compound comprising a moiety represented by *—Si—O—Si—* wherei

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Tae Gon
• Chung Deukseok
• Ahn Jooyeon
• Jun Shin Ae

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• C09K2323/00

  Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• C09D183/08

  containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen · CPC title

• C09K2323/03

  Viewing layer characterised by chemical composition · CPC title