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US 11,421,151 B2Granted
Light emitting device and display device including quantum dot
AssigneeSamsung Electronics Co., Ltd.
InventorsOul Cho, Jooyeon Ahn, Eun Joo Jang, Dae Young Chung, Hyun A Kang, Tae Hyung Kim, Yun Sung Woo, Jeong Hee Lee, Shin Ae Jun
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Abstract
A light emitting device including a semiconductor nanocrystal and a ligand bound to a surface of the semiconductor nanocrystal, wherein the ligand includes an organic thiol ligand or a salt thereof and a polyvalent metal compound including a metal including Zn, In, Ga, Mg, Ca, Sc, Sn, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Sr, Y, Zr, Nb, Mo, Cd, Ba, Au, Hg, Tl, or a combination thereof, and a display device including the light emitting device.
Claims20
A light emitting device comprising:
- a first electrode and a second electrode facing each other, and
- a light emitting layer disposed between the first electrode and the second electrode and comprising a quantum dot,
- wherein the quantum dot comprises
- a semiconductor nanocrystal, and
- a ligand and a polyvalent metal compound, the ligand and polyvalent metal compound each bound to a surface of the semiconductor nanocrystal,
- wherein the ligand comprises an organic thiol ligand or a salt thereof,
- wherein the quantum dot comprises a core comprising a first semiconductor nanocrystal and a shell disposed on the core and comprising a second semiconductor nanocrystal,
- wherein the polyvalent metal compound comprises a compound represented by Chemical Formula 2 or aluminum chloride:
- Chemical Formula 2
- MAn
- wherein M is Mg, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Sr, Y, Zr, Nb, Mo, Cd, In, Ba, Au, Hg, or Tl, n is determined depending on the valency of the M and is an integer of greater than or equal to 2, each A is the same or different, and is independently a C1-C10 organic group, a halogen, or a combination thereof, and
- wherein the compound represented by Chemical Formula 2 comprises a metal halide, a metal acrylate, a metal methacrylate, a metal dialkyldithiocarbamate, or a combination thereof.
9 more elements
A light emitting device comprising:
- a first electrode and a second electrode facing each other, and
- a light emitting layer disposed between the first electrode and the second electrode and comprising a quantum dot,
- wherein the quantum dot comprises
- a semiconductor nanocrystal, and
- a ligand and a polyvalent metal compound, the ligand and polyvalent metal compound each bound to a surface of the semiconductor nanocrystal,
- wherein the ligand comprises an organic thiol ligand or a salt thereof,
- wherein the quantum dot comprises a core comprising a first semiconductor nanocrystal and a shell disposed on the core and comprising a second semiconductor nanocrystal,
- wherein the polyvalent metal compound comprises a compound represented by Chemical Formula 2 or aluminum chloride:
- Chemical Formula 2
- MAn
- wherein M is Mg, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ga, Sr, Y, Zr, Nb, Mo, Cd, In, Ba, Au, Hg, or Tl, n is determined depending on the valency of the M and is an integer of greater than or equal to 2, each A is the same or different, and is independently a C1-C10 organic group, a halogen, or a combination thereof, and
- wherein the compound represented by Chemical Formula 2 comprises a metal halide, a metal carboxylate, a metal acrylate, a metal methacrylate, a metal dialkyldithiocarbamate, or a combination thereof.
9 more elements
A light emitting device comprising:
- a first electrode and a second electrode facing each other, and
- a light emitting layer disposed between the first electrode and the second electrode and comprising a quantum dot,
- wherein the quantum dot comprises
- a semiconductor nanocrystal, and
- a ligand and a polyvalent metal compound, the ligand and polyvalent metal compound each bound to a surface of the semiconductor nanocrystal,
- wherein the ligand comprises an organic thiol ligand or a salt thereof,
- wherein the quantum dot comprises a core comprising a first semiconductor nanocrystal and a shell disposed on the core and comprising a second semiconductor nanocrystal,
- wherein the polyvalent metal compound comprises a compound represented by Chemical Formula 2 or aluminum chloride:
- Chemical Formula 2
- MAn
- wherein M is Mg, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Sr, Y, Zr, Nb, Mo, Cd, In, Ba, Au, Hg, or Tl, n is determined depending on the valency of the M and is an integer of greater than or equal to 2, each A is the same or different, and is independently a C1-C10 organic group, a halogen, or a combination thereof,
- wherein the compound represented by Chemical Formula 2 comprises a metal halide, a metal carboxylate, a metal acrylate, a metal methacrylate, a metal dialkyldithiocarbamate, or a combination thereof, and
- wherein the compound represented by Chemical Formula 2 does not comprise a zinc carboxylate.
10 more elements
Dependencies are inferred from the claim text.