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US-20260125596-A1 - CURABLE COMPOSITION, CURED LAYER USING THE COMPOSITION AND DISPLAY DEVICE INCLUDING THE CURED LAYER

US20260125596A1US 20260125596 A1US20260125596 A1US 20260125596A1US-20260125596-A1

Abstract

Disclosed are a curable composition, a cured layer using the same, and a display device including the cured layer. The curable composition includes (A) quantum dots including a first functional group represented by Chemical Formula 1 and a second functional group including a *—OC(═O) group at the terminal end, and (B) a polymerizable compound. (In Chemical Formula 1, each substituent is as defined in the specification.)

Inventors

  • Sehee PARK
  • JiYoung JEONG
  • Woo Jung SHIN
  • Seongmi JEON
  • Jinwon Park
  • Young Woong JANG
  • Bumjin LEE

Assignees

  • SAMSUNG SDI CO., LTD.

Dates

Publication Date
20260507
Application Date
20240402
Priority Date
20230829

Claims (15)

  1. 1 . A curable composition, comprising: (A) quantum dots including a first functional group represented by Chemical Formula 1 and a second functional group including a *—OC(═O) group at a terminal end, and (B) a polymerizable compound: wherein, in Chemical Formula 1, R 1 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a fused ring group thereof, L 1 to L 4 are each independently a single bond, an ether group (*—O—*), or a substituted or unsubstituted C1 to C20 alkylene group, and n is an integer from 1 to 20.
  2. 2 . The curable composition of claim 1 , wherein the second functional group is represented by Chemical Formula 2: wherein, in Chemical Formula 2, R 2 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or *—C(═O)R 3 , wherein R 3 is a C1 to C10 alkyl group or wherein R a to R c are each independently a hydrogen atom or a C1 to C10 alkyl group, L 5 to L 7 are each independently a single bond, an ether group (*—O—*), an ester group (*—C(═O)O—* or *—OC(═O)—*), or a substituted or unsubstituted C1 to C20 alkylene group, and m is an integer of 1 to 20.
  3. 3 . The curable composition of claim 1 , wherein the first functional group and second functional group are included in a molar ratio of 1:0.5 to 1:1.5.
  4. 4 . The curable composition of claim 1 , wherein the first functional group represented by at least one selected from Chemical Formula 1-1 to Chemical Formula 1-3:
  5. 5 . The curable composition of claim 1 , wherein the second functional group is represented by at least one selected from Chemical Formula 2-1 to Chemical Formula 2-4:
  6. 6 . The curable composition of claim 1 , wherein the first functional group is derived from a compound represented by Chemical Formula 3: wherein, in Chemical Formula 3, R 1 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a fused ring group thereof, L 1 to L 4 are each independently a single bond, an ether group (*—O—*), or a substituted or unsubstituted C1 to C20 alkylene group, and n is an integer from 1 to 20.
  7. 7 . The curable composition of claim 6 , wherein the compound represented by Chemical Formula 3 is represented by at least one selected from Chemical Formula 3-1 to Chemical Formula 3-3:
  8. 8 . The curable composition of claim 1 , wherein the second functional group is derived from a compound represented by Chemical Formula 4: wherein, in Chemical Formula 4, R 2 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or *—C(═O)R 3 , wherein R 3 is a C1 to C10 alkyl group or wherein R a to R c are each independently a hydrogen atom or a C1 to C10 alkyl group, L 5 to L 7 are each independently a single bond, an ether group (*—O—*), an ester group (*—C(═O)O—* or *—OC(═O)—*), or a substituted or unsubstituted C1 to C20 alkylene group, and m is an integer of 1 to 20.
  9. 9 . The curable composition of claim 8 , wherein the compound represented by Chemical Formula 4 is represented by at least one selected from Chemical Formula 4-1 to Chemical Formula 4-4:
  10. 10 . The curable composition of claim 1 , wherein the curable composition further includes a polymerization initiator, a binder resin, a light diffusing agent, a solvent, or a combination thereof.
  11. 11 . The curable composition of claim 10 , wherein the light diffusing agent includes barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.
  12. 12 . The curable composition of claim 10 , wherein the curable composition further includes malonic acid; 3-amino-1,2-propanediol; a polymerization inhibitor; a silane-based coupling agent; a leveling agent; a fluorine-based surfactant; or a combination thereof.
  13. 13 . The curable composition of claim 10 , wherein the curable composition includes, based on a total weight of the curable composition, 1 wt % to 40 wt % of the quantum dots; 1 wt % to 20 wt % of the polymerizable compound; 0.1 wt % to 5 wt % of the polymerization initiator; 1 wt % to 30 wt % of the binder resin; 1 wt % to 20 wt % of the light diffusing agent; and 40 wt % to 80 wt % of the solvent.
  14. 14 . A cured layer manufactured using the curable composition of claim 1 .
  15. 15 . A display device comprising the cured layer of claim 14 .

Description

TECHNICAL FIELD This disclosure relates to a curable composition, a cured layer using the composition, and a display device including the cured layer. BACKGROUND ART In the case of general quantum dots, due to surface characteristics having hydrophobicity, a solvent in which it is dispersed is limited, and thus, it is difficult to introduce into a polar system such as a binder or a curable monomer. A quantum dot photoresist composition applied to a quantum dot display, like a conventional photoresist composition, consists of photosensitive monomers, binders, initiators, solvents, additives, and the like and also, includes quantum dots and light diffusing agents instead of pigments/dyes for securing color characteristics, wherein the quantum dots have a function of converting incident blue light into red and green light after forming a single film. As the quantum dots represented by CdSe, InP, etc. are rapidly progressing in terms of luminous efficiency (a quantum yield), a synthesis method thereof capable of achieving the luminous efficiency close to 100% is currently being introduced. Currently, QD-OLED TV using a quantum dot ink composition based on OLED blue backlight has been successfully commercialized. As a later version, a quantum dot display made by using Blue μ-LED as backlight is being developed. Since this μ-LED light source has very stronger intensity than conventional OLEDs, it is one of key technologies to develop a quantum dot photoresist composition capable of withstanding the strong light intensity of the μ-LED light source. DISCLOSURE Technical Problem An embodiment provides a quantum dot-containing curable composition that secures light resistance reliability, which is the ability to withstand strong light. Another embodiment provides a cured layer produced using the curable composition. Another embodiment provides a display device including the cured layer. Technical Solution An embodiment provides a curable composition including (A) quantum dots including a first functional group represented by Chemical Formula 1 and a second functional group including a *—OC(═O) group at the terminal end, and (B) a polymerizable compound. In Chemical Formula 1, R1 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a fused ring group thereof,L1 to L4 are each independently a single bond, an ether group (*—O—*), or a substituted or unsubstituted C1 to C20 alkylene group, andn is an integer from 1 to 20. The second functional group may be represented by Chemical Formula 2. In Chemical Formula 2, R2 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or *—C(═O)R3, wherein R3 is a C1 to C10 alkyl group or (wherein Ra to Rc are each independently a hydrogen atom or a C1 to C10 alkyl group),L5 to L7 are each independently a single bond, an ether group (*—O—*), an ester group (*—C(═O)O—* or *—OC(═O)—*), or a substituted or unsubstituted C1 to C20 alkylene group, andm is an integer of 1 to 20. The first functional group and the second functional group may be included in a molar ratio of 1:0.5 to 1:1.5. The first functional group may be represented by at least one selected from Chemical Formula 1-1 to Chemical Formula 1-3. The second functional group may be represented by at least one selected from Chemical Formula 2-1 to Chemical Formula 2-4. The first functional group may be derived from a compound represented by Chemical Formula 3. In Chemical Formula 3, R1 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C3 to C20 cycloalkenyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or a fused ring group thereof,L1 to L4 are each independently a single bond, an ether group (*—O—*), or a substituted or unsubstituted C1 to C20 alkylene group, andn is an integer from 1 to 20. The compound represented by Chemical Formula 3 may be represented by at least one selected from Chemical Formula 3-1 to Chemical Formula 3-3. The second functional group may be derived from a compound represented by Chemical Formula 4. In Chemical Formula 4, R2 is a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C2 to C20 heterocycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, or *—C(═O)R3, wherein R3 is a C1 to C10 alkyl group or (wherein Ra to Rc are each independently a hydrogen atom or a C1 to C10 alkyl group),L5 to L7 are each independen