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KR-20260062789-A - quantum dot, electronic device including the same and electronic apparatus including the electronic device

KR20260062789AKR 20260062789 AKR20260062789 AKR 20260062789AKR-20260062789-A

Abstract

A quantum dot is disclosed comprising a core containing CuInGaS₂ ; a shell surrounding at least a portion of the core; and a metal-containing ligand surrounding at least a portion of the shell. The metal-containing ligand comprises a metal and a repeating unit represented by Formula 1: <Chemical Formula 1> *-[C(R 1 )(R 2 )-C(R 3 )(R 4 )-(L 1 ) m1 -O] n1 -*' Refer to the present specification for the description of Chemical Formula 1 above.

Inventors

  • 이경식
  • 이택준
  • 장승희
  • 장재복

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20250326
Priority Date
20241028

Claims (20)

  1. Core containing CuInGaS2 ; A shell surrounding at least a portion of the above core; and It includes a metal-containing ligand surrounding at least a portion of the shell, and The above metal-containing ligand is a quantum dot comprising a metal and a repeating unit represented by the following chemical formula 1: <Chemical Formula 1> *-[C(R 1 )(R 2 )-C(R 3 )(R 4 )-(L 1 ) m1 -O] n1 -*' Among the above chemical formula 1, L1 is a C1 - C60 alkylene group substituted or unsubstituted with at least one R10a , and m1 is 0 or 1, and n1 is 1 to 20, and R1 to R4 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, a C1 - C60 alkyl group substituted or unsubstituted with at least one R10a , a C2 - C60 alkenyl group substituted or unsubstituted with at least one R10a , a C2 - C60 alkynyl group substituted or unsubstituted with at least one R10a , a C1-C60 alkoxy group substituted or unsubstituted with at least one R10a , a C3 - C60 carbocyclic group substituted or unsubstituted with at least one R10a , a C1 - C60 heterocyclic group substituted or unsubstituted with at least one R10a , -Si( Q1 )( Q2 )( Q3 ), -N( Q1 )( Q2 ), -B(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O) 2 (Q 1 ), or -P(=O)(Q 1 )(Q 2 ), and R 10a is, Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group; Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3 - C60 carbocyclic group, C1 - C60 heterocyclic group, C6 - C60 aryloxy group, C6 - C60 arylthio group, C7 - C60 arylalkyl group, C2 - C60 heteroarylalkyl group, -Si( Q11 )( Q12 )( Q13 ), -N( Q11 )( Q12 ), -B( Q11)(Q12 ) , -C(=O)( Q11 ), -S(=O) 2 ( Q11 ), -P(=O)( Q11 )( Q12 ), or any combination thereof, C1 - C60 alkyl group, C2 -C60 alkenyl group, C2 - C60 alkynyl group, or C1 - C60 alkoxy group; Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1 - C60 alkyl group, C2 - C60 alkenyl group, C2 - C60 alkynyl group, C1 - C60 alkoxy group, C3 - C60 carbocyclic group, C1 - C60 heterocyclic group, C6 - C60 aryloxy group, C6 - C60 arylthio group, C7 - C60 arylalkyl group, C2 - C60 heteroarylalkyl group, -Si( Q21 )( Q22 )( Q23 ), -N( Q21 )( Q22 ), -B( Q21)(Q22 ) , -C(=O)( Q21 ), -S(=O) 2 (Q 21 ), -P(=O)(Q 21 )(Q 22 ), or any combination thereof, substituted or unsubstituted with a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 arylalkyl group, or a C 2 -C 60 heteroarylalkyl group; or -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O) 2 (Q 31 ), or -P(=O)(Q 31 )(Q 32 ), Q1 to Q3 , Q11 to Q13, Q21 to Q23 , and Q31 to Q33 are independently of each other. Hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group; or Deuterium, -F, cyano group, C1 - C60 alkyl group, C1 - C60 alkoxy group, phenyl group, biphenyl group, or any combination thereof substituted or unsubstituted, C1 - C60 alkyl group, C2 - C60 alkenyl group, C2 - C60 alkynyl group, C1 - C60 alkoxy group, C3 - C60 carbocyclic group, or C1 - C60 heterocyclic group, and * and *' are each bonding sites with neighboring atoms.
  2. In paragraph 1, The above quantum dot absorbs light of 400 nm to 500 nm and emits light of 600 nm to 680 nm.
  3. In paragraph 1, A quantum dot in which the difference between the minimum conduction band of the core and the minimum conduction band of the shell surrounded by the metal-containing ligand is greater than 0.3 eV.
  4. In paragraph 1, A quantum dot in which the difference between the lattice constant of the core and the lattice constant of the shell is 0 Å to 0.2 Å.
  5. In paragraph 1, The shell comprises a quantum dot including ZnS, ZnMgS, ZnMnS, ZnAlS, MnS, or any combination thereof.
  6. In paragraph 1, A quantum dot in which the ratio of the molar amount of the metal-containing ligand to the total molar amount of the ligand surrounding the shell is 70% to 100%.
  7. In paragraph 1, A quantum dot having a molecular weight of 200 to 1000 of the metal-containing ligand.
  8. In paragraph 1, Quantum dots, wherein the metal is Mg, Mn, or Zn.
  9. In paragraph 1, A quantum dot in which m1 is 0 in the above chemical formula 1.
  10. In paragraph 1, Among the above chemical formula 1, Quantum dots, wherein R1 to R4 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, or C1 - C60 alkyl group substituted or unsubstituted with at least one R10a .
  11. In paragraph 1, The above metal-containing ligand is a quantum dot represented by the following chemical formula 2: <Chemical Formula 2> Among the above chemical formula 2, M is the above metal, and n2 is 1 to 6, and T is a repeating unit represented by the above chemical formula 1, * in the above chemical formula 1 is a binding site with X1 in the above chemical formula 2, and *' in the above chemical formula 1 is a binding site with Z1 in the above chemical formula 2, and L2 is a C1 - C60 alkylene group substituted or unsubstituted with at least one R10a , and m2 is 0 or 1, and X 1 is O or S, and X 2 is * 1 -O(C=O)-* 2 , * 1 -O-* 2 , * 1 -S-* 2 , * 1 -N(Z 2 )-* 2 or * 1 -P(Z 2 )-* 2 , * 1 is a binding site with M, and * 2 is a binding site with L 2 or X 1 , and Z1 and Z2 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1 - C60 alkyl group substituted or unsubstituted with at least one R10a , C2 - C60 alkenyl group substituted or unsubstituted with at least one R10a , C2 - C60 alkynyl group substituted or unsubstituted with at least one R10a , C1-C60 alkoxy group substituted or unsubstituted with at least one R10a , C3 - C60 carbocyclic group substituted or unsubstituted with at least one R10a , C1 - C60 heterocyclic group substituted or unsubstituted with at least one R10a , -Si( Q1 )( Q2 )( Q3 ), -N( Q1 )( Q2 ), -B(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O) 2 (Q 1 ), or -P(=O)(Q 1 )(Q 2 ), and R 10a and Q 1 to Q 3 are each the same as defined in Chemical Formula 1 above.
  12. In Paragraph 11, A quantum dot in which n2 is 1 in the above chemical formula 2.
  13. First electrode; A second electrode facing the first electrode; An intermediate layer disposed between the first electrode and the second electrode; A thin-film transistor electrically connected to the first electrode; and An electronic device comprising a quantum dot according to any one of paragraphs 1 through 12.
  14. In Paragraph 13, The electronic device, wherein the intermediate layer comprises a hole transport region, a light-emitting layer, and an electron transport region sequentially disposed on the first electrode.
  15. In Paragraph 14, An electronic device in which the light-emitting layer includes the quantum dots.
  16. In Paragraph 14, It further includes a color conversion layer disposed on the second electrode, and An electronic device comprising the above color conversion layer and the above quantum dots.
  17. In Paragraph 13, The above intermediate layer includes a plurality of stacks, and An electronic device wherein each of the plurality of stacks comprises a hole transport region, a light-emitting layer, and an electron transport region sequentially disposed on the first electrode.
  18. In Paragraph 13, An electronic device further comprising a color filter, a touchscreen layer, a polarizing layer, or any combination thereof.
  19. In Paragraph 13, A backlight disposed below the thin-film transistor; and It further includes a performance enhancement layer disposed between the backlight and the thin-film transistor, and An electronic device in which the above performance enhancement layer includes the above quantum dots.
  20. Electronic device pursuant to Paragraph 13; and An electronic device comprising at least one of a processor that transmits a signal to the electronic device, a memory that stores data information necessary for the operation of the electronic device, and a power module that supplies power necessary for the operation of the electronic device.

Description

quantum dot, electronic device including the same, and electronic apparatus including the electronic device The invention relates to quantum dots, electronic devices including the same, and electronic devices including the said electronic devices. Quantum dots can be utilized as materials that perform various optical functions (e.g., light conversion, light emission, etc.) in optical components and various electronic devices. Quantum dots are nanoscale semiconductor nanocrystals that exhibit optoelectronic properties due to the quantum confinement effect. By controlling the size and composition of the nanocrystals, quantum dots can have different energy bandgaps and, accordingly, emit light of various emission wavelengths. Optical components containing such quantum dots can take the form of a thin film, for example, a thin film patterned for each subpixel. Such optical components can also be utilized as color conversion components in devices containing various light sources. In addition, quantum dots can be used for various purposes in various electronic devices. For example, the quantum dots can also be used as emitters. As an example, the quantum dots can be included in the light-emitting layer of a light-emitting device comprising a pair of electrodes and a light-emitting layer to serve as emitters. To realize high-quality optical components and electronic devices, there is a need to develop quantum dots exhibiting excellent external quantum efficiency (EQE) and excellent lifetime. Figure 1 is a diagram showing the energy levels of quantum dots without metal-containing ligands and quantum dots containing metal-containing ligands, respectively. FIG. 2 is a schematic diagram showing an electronic device according to one embodiment of the present invention. FIG. 3 is a schematic diagram showing an electronic device according to another embodiment of the present invention. FIG. 4 is a schematic diagram showing an intermediate layer included in an electronic device according to one embodiment of the present invention. FIG. 5 is a schematic diagram showing an electronic device according to one embodiment of the present invention. FIG. 6 is a schematic diagram showing an electronic device according to another embodiment of the present invention. FIG. 7 is a block diagram showing an electronic device including an electronic device according to one embodiment of the present invention. FIG. 8 is a schematic diagram showing an electronic device according to various embodiments. FIG. 9 is a schematic perspective view of an electronic device including an electronic device according to one embodiment of the present invention. FIG. 10 is a schematic drawing showing the exterior of a vehicle as an electronic device including an electronic device according to one embodiment of the present invention. FIGS. 11a to 11c are schematic drawings showing the interior of the vehicle of FIG. 10. The term "combined with" means that two atoms are directly bonded without any other atoms between them, through covalent bonds, coordinate bonds, etc. The term "connected to" implies not only that they are "bonded," but also that a single or multiple other atoms may exist between the two atoms. That is, if a first atom bonds with a second atom and the second atom bonds with a third atom, the first atom is connected to the third atom. For example, if atoms A1 to A3 are in the relationship " A1 - A2 - A3 ", then atom A2 is bonded to atom A1 and is connected to atom A1 , atom A2 is bonded to atom A3 and is connected to atom A3 , and atom A1 is not bonded to atom A3 but is connected to atom A3 . According to one aspect, a quantum dot is provided comprising: a core including CuInGaS₂ ; a shell surrounding at least a portion of the core; and a metal-containing ligand surrounding at least a portion of the shell, wherein the metal-containing ligand comprises a metal and a repeating unit represented by the following chemical formula 1: <Chemical Formula 1> *-[C(R 1 )(R 2 )-C(R 3 )(R 4 )-(L 1 ) m1 -O] n1 -*' Among the above chemical formula 1, L1 is a C1 - C60 alkylene group substituted or unsubstituted with at least one R10a , and m1 is 0 or 1, and n1 is 1 to 20, and R1 to R4 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, a C1 - C60 alkyl group substituted or unsubstituted with at least one R10a , a C2 - C60 alkenyl group substituted or unsubstituted with at least one R10a , a C2 - C60 alkynyl group substituted or unsubstituted with at least one R10a , a C1-C60 alkoxy group substituted or unsubstituted with at least one R10a , a C3 - C60 carbocyclic group substituted or unsubstituted with at least one R10a , a C1 - C60 heterocyclic group substituted or unsubstituted with at least one R10a , -Si( Q1 )( Q2 )( Q3 ), -N( Q1 )( Q2 ), -B(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O) 2 (Q 1 ), or -P(=O)(Q 1 )(Q 2 ), and R 10a is, Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group; Deuterium, -F