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US 11,634,631 B2Granted
Cadmium free reverse type 1 nanostructures with improved blue light absorption for thin film applications
AssigneeNanosys, Inc.
InventorsJohn Curley, Chunming Wang, Jay Yamanaga, Xiaofeng Zhang, Christian Ippen
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Abstract
The invention relates to highly luminescent nanostructures with improved blue light absorbance, particularly core/shell nanostructures comprising a ZnSe core and InP and/or ZnS shell layers. The invention also relates to methods of producing such nanostructures.
Claims20
A nanostructure comprising:
- a core;
- and
- a first shell disposed on the core, the first shell comprising a first semiconductor material comprising InP;
- and
- a second shell disposed on the first shell, the second layer comprising a second semiconductor material,
- wherein a band gap energy of the core is greater than a band gap energy of the first shell, and
- wherein an optical density at 450 nm per total mass (OD450/total mass) of the nanostructure is between about 0.4 and about 0.9.
4 more elements
A method of making a ZnSe core nanostructure with a half width at half maximum (HWHM) of an emitted light of less than or equal to about 10 nm, comprising:
- (a) admixing a solution of a selenium source, a zinc source, and at least one ligand under a first temperature between about 260° C. and about 340° C.;
- (b) adjusting the first temperature of the admixture in (a) to a second temperature between about 260° C. and about 300° C.;
- and
- (c) infusing a solution comprising the selenium source and the zinc source into the admixture in (b) at an infusing rate between about 0.5 mL/min and about 3 mL/min;
- to provide the core nanostructure.
2 more elements
A method of making a core/shell nanostructure, comprising:
- (a) providing a core comprising a ZnSe nanostructure with a half width at half maximum (HWHM) of an emitted light of less than or equal to about 10 nm, and a first ligand;
- (b) admixing the core with a zinc carboxylate;
- and
- (c) admixing the admixture in (b) with an indium source and a phosphorus source;
- and
- (d) admixing the admixture in (c) with a zinc source and a sulfur source.
3 more elements
Dependencies are inferred from the claim text.