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US 11,142,692 B2Granted
Capped co-doped core/shell nanocrystals for visible light emission
AssigneeThe Regents of the University of California
InventorsJin Z. Zhang, Jason K. Cooper, Sheraz Gul
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Abstract
In various embodiments the present disclosure provides a core/shell nanocrystal comprising a core and a shell formed on the core, wherein the core/shell nanocrystal is co-doped with at least one metal dopant and at least one trivalent cation. In some embodiments, the trivalent cation is a Group 13 element. Methods of making and using the core/shell nanocrystal are also described.
Claims24
A core/shell nanocrystal, comprising:
- a core;
- (i) a shell formed on a surface of the core, wherein the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, and wherein the metal dopant is Cu+, or (ii) an undoped shell formed on a surface of the core, wherein the core of the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, wherein the metal dopant is Cu+, and an undoped passivation shell formed on a surface of the undoped shell, or (iii) an undoped shell formed on a surface of the core, wherein the core of the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, wherein the metal dopant is Cu+;
- and
- a capping ligand, wherein the capping ligand has the structure:
- wherein R1 is —CH2(CH2)7CH═CH(CH2)7CH3 or —CH2(CH2)6CH3;
- and
- wherein the capping ligand is attached to a surface of the shell in (i), or
- wherein the capping ligand is attached to a surface of the undoped passivation shell in (ii), or
- wherein the capping ligand is attached to a surface of the undoped shell in (iii).
6 more elements
A method of making a core/shell nanocrystal, the method comprising:
- forming a core;
- (i) forming a shell on a surface of the core so as to make the core/shell nanocrystal, wherein the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, and wherein the metal dopant is Cu+, or (ii) forming an undoped shell on a surface of the core so as to make the core/shell nanocrystal, wherein the core of the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, and wherein the metal dopant is Cu+, and forming an undoped passivation shell on a surface of the undoped shell, or (iii) forming an undoped shell on a surface of the core so as to make the core/shell nanocrystal, wherein the core of the core/shell nanocrystal is co-doped with a metal dopant and at least one Group 13 trivalent cation, and wherein the metal dopant is Cu+;
- providing a capping ligand, wherein the capping ligand has the structure:
- wherein R1 is —CH2(CH2)7CH═CH(CH2)7CH3 or —CH2(CH2)6CH3;
- and
- attaching the capping ligand to a surface of the shell in (i), or
- attaching the capping ligand to a surface of the undoped passivation shell in (ii), or
- attaching the capping ligand to a surface of the undoped shell in (iii).
5 more elements
Dependencies are inferred from the claim text.