A quantum dot having a perovskite crystal structure and including a compound represented by Chemical Formula 1: ABX 3+α Chemical Formula 1 wherein, A is a Group IA metal selected from Rb, Cs, Fr, and a combination thereof, B is a Group IVA metal selected from Si, Ge, Sn, Pb, and a combination thereof, X is a halogen selected from F, Cl, Br, and I, BF 4 , or a combination thereof, and α is greater than 0 and less than or equal to about 3; and wherein the quantum dot has a size of about 1 nanometer to about 50 nanometers.

Claims

30 · 2 independent · depth 3

30 granted claims

›1.independentA quantum dot having a perovskite crystal structure and comprising a compound represented by Chemical Formula 1: ABX 3+α Chemical Formula 1 wherein, A…+19

›2.↳ 1The quantum dot of claim 1 , wherein a photoluminescence peak wavelength of the quantum dot is in a range of about 300 nanometers to about 700 nanomet…d2

›3.↳ 1The quantum dot of claim 1 , wherein a photoluminescence peak wavelength of the quantum dot is in a range of about 400 nanometers to about 680 nanomet…d2

›4.↳ 1The quantum dot of claim 1 , wherein the quantum dot further comprises at least one of a first dopant and a second dopant, wherein the first dopant co…d2+5

›5.↳ 4The quantum dot of claim 4 , wherein the first metal has a smaller crystal ionic radius than a crystal ionic radius of the Group IVA metal of the B in…d3

›6.↳ 4The quantum dot of claim 4 , wherein the first metal is selected from Zn, Cd, Hg, Ga, In, Cu, Al, Li, Na, Be, Mg, Ca, Sr, Ag, Pt, Pd, Ni, Co, Fe, Cr, …d3

›7.↳ 4The quantum dot of claim 4 , wherein the quantum dot comprises the first dopant, and an amount of the first dopant is greater than or equal to about 0…d3

›8.↳ 4The quantum dot of claim 4 , wherein the quantum dot comprises the second dopant, and an amount of the second dopant is greater than or equal to about…d3

›9.↳ 4The quantum dot of claim 4 , wherein the quantum dot comprises the first dopant and the second dopant, and each of an amount of the first dopant and a…d3

›10.↳ 1The quantum dot of claim 1 , wherein the compound is selected from CsPbCl 3+α ,CsPbBr 3+α , CsPbI 3+α ,CsPb(Cl,I) 3+α , CsPb(Br,I) 3+α , CsPb(Br,Cl) 3…d2

›11.↳ 1The quantum dot of claim 1 , wherein an atomic ratio of a halogen relative to the Group IA metal when measured by a transmission electron microscope-e…d2

›12.↳ 1The quantum dot of claim 1 , wherein an atomic ratio of a halogen relative to the Group IA metal when measured by a transmission electron microscope-e…d2

›13.↳ 1The quantum dot of claim 1 , wherein the quantum dot comprises an organic ligand compound selected from RCOOH, RNH 2 , R 2 NH, R 3 N, RSH, R 3 PO, R 3…d2

›14.↳ 1The quantum dot of claim 1 , wherein the quantum dot has a full width at half maximum photoluminescence peak wavelength of less than or equal to about…d2

›15.↳ 1The quantum dot of claim 1 , wherein the quantum dot has a quantum efficiency of greater than or equal to about 60%.d2

›26.↳ 1A quantum dot-polymer composite comprising a polymer matrix; and a quantum dot of claim 1 , wherein the quantum dot is dispersed in the polymer matrix…d2+3

›30.↳ 1An electronic device comprising the quantum dot of claim 1 .d2

›16.independentA method of producing a quantum dot, the method comprising: providing a reaction solution comprising a first precursor comprising a Group IA metal sel…+9

›17.↳ 16The method of claim 16 , wherein the first metal is present and is selected from Zn, Cd, Hg, Ga, In, Cu, Al, Li, Na, Be, Mg, Ca, Sr, Ag, Pt, Pd, Ni, C…d2

›18.↳ 16The method of claim 16 , wherein the first precursor is selected from a metal powder, a metal carbonate, an alkylated metal compound, a metal alkoxide…d2

›19.↳ 16The method of claim 16 , wherein the second precursor is selected from a Pb halide, a Ge halide, a Si halide, a Sn halide, and a combination thereof.d2

›20.↳ 16The method of claim 16 , wherein the reaction solution comprises the first additive and the first additive comprises a halide of the first metal.d2

›21.↳ 16The method of claim 16 , wherein the first additive is selected from ZnX 2 , CdX 2 , HgX 2 , GaX 3 , InX 3 , T 1 X 3 , CuX 2 , AIX 3 , LiX, NaX, BeX 2…d2

›22.↳ 16The method of claim 16 , wherein the reaction solution comprises the second additive, and the second additive is selected from sulfur-trioctylphosphin…d2

›23.↳ 16The method of claim 16 , wherein the providing the reaction solution comprises adding a solvent selected from a C6 to C22 amine compound, a nitrogen-c…d2

›24.↳ 16The method of claim 16 , wherein the reaction solution further comprises at least one organic ligand compound selected from RCOOH, RNH 2 , R 2 NH, R 3…d2

›25.↳ 16The method of claim 16 , wherein the providing the reaction solution comprises preparing a first solution comprising the first precursor; preparing a …d2

Classifications

8 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B82Y20/00
B82Y40/00

Section C — Chemistry; metallurgy

C09K11/66
C08K3/16
C09K11/88
C09K11/02
C09K11/61

Section H — Electricity

H01L27/32

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2.6 y

964 days filing → grant

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non-final + final

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C Melissa Koslow

art unit 1734 · TC 1700

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Type	Document	Date
related publication	US 20170121598 A1	4 May 2017

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