LAYERED STRUCTURES AND QUANTUM DOT SHEETS AND ELECTRONIC DEVICES INCLUDING THE SAME

• US 20170317246A1
• Filed: 04/28/2017
• Published: 11/02/2017
• Est. Priority Date: 04/28/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KANG, Hyun A., WON, Nayoun, JANG, Eun Joo, KWON, Ha Il, LEE, Jeong Hee, CHO, Oul, KIKUCHI, Tomoyuki
• Granted Patent: US 10,559,726 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: C08F 222/26 of unsaturated alcohols C08F222/1006 takes precedence
• CPC Class Codes: C08G 75/045 from mercapto compounds and unsaturated compounds
• CPC Class Codes: C08K 3/346 Clay
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C09D 181/00 Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 1/133614 using photoluminescence, e.g. phosphors illuminated by UV or blue light
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil
• CPC Class Codes: H10K 50/115 comprising active inorganic nanostructures, e.g. luminescent quantum dots
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

A layered structure having a first layer including a polymerization product of a monomer combination including a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end, wherein the first monomer includes a first thiol compound represented by Chemical Formula 1-1 including a thioglycolate moiety and a second thiol represented by Chemical Formula 1-2, and wherein the second monomer includes an ene compound represented by Chemical Formula 2:

• • wherein in Chemical Formulae 1-1, 1-2, and 2, groups and variables are the same as described in the specification.

Claims

1. A layered structure comprising a first layer comprising a polymerization product of a monomer combination comprising a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end,

wherein the first monomer comprises a first thiol compound represented by Chemical Formula 1-1 comprising a thioglycolate moiety and a second thiol represented by Chemical Formula 1-2:

2. The layered structure of claim 1, wherein the first thiol compound comprises a compound represented by Chemical formula 1-1-1:

3. The layered structure of claim 1, wherein the first monomer comprises the first thiol compound in an amount of less than or equal to about 70 mole percent based on a total amount of the first monomer.

4. The layered structure of claim 1, wherein the second thiol compound comprises trimethylolpropane tris(3-mercaptopropionate) of Chemical Formula 1-2-1, pentaerythritol tetrakis(3-mercaptopropionate) of Chemical Formula 1-2-2, tris[2-(3-mercaptopropionyloxy)alkyl] isocyanurate of Chemical Formula 1-2-3, pentaerythritol tetrakis(3-mercaptobutylate), tris[2-(3-mercaptopropionyloxy)ethyl] isocyanurate, or a combination thereof:

5. The layered structure of claim 1, wherein the ene compound comprises a compound represented by Chemical Formula 2-1:

6. The layered structure of claim 1, wherein the ene compound comprises a compound represented by Chemical Formula 2-1-1:

7. The layered structure of claim 1, wherein the first layer further comprises an oxide particle dispersed in the polymerization product, and wherein the oxide particle comprises SiO₂, a clay particle, or a combination thereof.

8. The layered structure of claim 7, wherein the amount of the clay particle is greater than or equal to about 0 and less than or equal to about 5 percent by weight based on a total weight of the polymerization product.

9. The layered structure of claim 1, wherein the layered structure comprises a transparent substrate disposed on a surface of the first layer.

10. The layered structure of claim 1, wherein the layered structure comprises a second layer disposed on a surface of the first layer, wherein the second layer comprises silicon oxide, silicon nitride, silicon carbide, silicon oxynitride, silicon oxycarbide, aluminum oxide, aluminum nitride, aluminum carbide, aluminum oxynitride, aluminum oxycarbide, titanium oxide, titanium nitride, titanium carbide, titanium oxynitride, titanium oxycarbide, or a combination thereof.

11. The layered structure of claim 10, wherein the first layer has a thickness of less than or equal to about 40 micrometers.

12. The layered structure of claim 10,

wherein the second layer has an oxygen transmission rate of greater than or equal to about 0.01 cubic centimeters per square meter per day per atmosphere (cc/m²/day/atm) and less than or equal to about 1 cubic centimeters per square meter per day per atmosphere (cc/m²/day/atm) according to a JIS K7126-2 method or an ASTM D 3985 method, and

wherein the second layer has a water vapor transmission rate of 0.01 grams per square meter per day (g/m²/day) to 1 grams per square meter per day (g/m²/day) according to a JIS K7129B method.

13. The layered structure of claim 10, wherein the layered structure has a primer layer disposed directly on the second layer.

14. The layered structure of claim 13, wherein the primer layer has a thickness of less than or equal to about 3 micrometers, and wherein the primer layer comprises a silane compound.

15. The layered structure of claim 1, wherein the layered structure does not show melting when it is kept at a temperature of 60°

C. under a relative humidity of 95% for 1,000 hours.

16. A quantum dot sheet comprising:

a photoconversion layer comprising a polymer matrix and a plurality of quantum dots dispersed in the polymer matrix; and

a layered structure of claim 1, wherein the layered structure is disposed on at least one surface of the photoconversion layer, wherein the at least one surface of the photoconversion layer faces a surface of the first layer of the layered structure.

17. The quantum dot sheet of claim 16, wherein the polymer matrix comprises a thiol-ene polymer, a poly(meth)acrylate, a urethane polymer, an epoxy polymer, a vinyl polymer, a silicone polymer, or a combination thereof.

18. The quantum dot sheet of claim 16, wherein the quantum dot comprises a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV element or compound, a Group I-III-VI compound, a Group I-II-IV-VI compound, or a combination thereof.

19. The quantum dot sheet of claim 16, wherein the quantum dot sheet has a brightness maintenance ratio of greater than or equal to about 90% when it is kept at a temperature of 60°

C. and a relative humidity of 95% for 1,000 hours.

20. A backlight unit comprising a quantum dot sheet of claim 16.

21. An electronic device comprising a quantum dot sheet of claim 16.