Title: Colloidal nanocrystals and method of making

Abstract

A tight confinement nanocrystal comprises a homogeneous center region having a first composition and a smoothly varying region having a second composition wherein a confining potential barrier monotonically increases and then monotonically decreases as the smoothly varying region extends from the surface of the homogeneous center region to an outer surface of the nanocrystal. A method of producing the nanocrystal comprises forming a first solution by combining a solvent and at most two nanocrystal precursors; heating the first solution to a nucleation temperature; adding to the first solution, a second solution having a solvent, at least one additional and different precursor to form the homogeneous center region and at most an initial portion of the smoothly varying region; and lowering the solution temperature to a growth temperature to complete growth of the smoothly varying region.

Inventors:

Kahen, Keith

Issue Date:

2015-10-06

Research Org.:

The Research Foundation for the State University of New York, Amherst, NY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1222597

Patent Number(s):

9153731

Application Number:

14/454,293

Assignee:

The Research Foundation for the State University of New York (Amherst, NY)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C - CHEMISTRY C09 - DYES C09C - TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B19/007 - {Tellurides or selenides of metals

C - CHEMISTRY C09 - DYES C09C - TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

C09C1/00 - Treatment of specific inorganic materials other than fibrous fillers

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K11/00 - Luminescent, e.g. electroluminescent, chemiluminescent materials
C09K11/02 - Use of particular materials as binders, particle coatings or suspension media therefor
C09K11/08 - containing inorganic luminescent materials

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

H01L33/002 - {having heterojunctions or graded gap}
H01L33/005 - {Processes}
H01L33/06 - within the light emitting region, e.g. quantum confinement structure or tunnel barrier

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DOE Contract Number:  

EE0000979

Resource Type:

Patent

Resource Relation:

Patent File Date: 2014 Aug 07

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE