Title: Method of making highly-confined semiconductor nanocrystals

Abstract

A method of making a colloidal solution of high confinement semiconductor nanocrystals includes: forming a first solution by combining a solvent, growth ligands, and at most one semiconductor precursor; heating the first solution to the nucleation temperature; and adding to the first solution, a second solution having a solvent, growth ligands, and at least one additional and different precursor than that in the first solution to form a crude solution of nanocrystals having a compact homogenous semiconductor region. The method further includes: waiting 0.5 to 20 seconds and adding to the crude solution a third solution having a solvent, growth ligands, and at least one additional and different precursor than those in the first and second solutions; and lowering the growth temperature to enable the formation of a gradient alloy region around the compact homogenous semiconductor region, resulting in the formation of a colloidal solution of high confinement semiconductor nanocrystals.

Inventors:

Kahen, Keith Brian; Holland, Matthew; Kuttiatoor, Sudeep Pallikkara

Issue Date:

Tue Jul 22 00:00:00 EDT 2014

Research Org.:

Eastman Kodak Company, Rochester, NY (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1532107

Patent Number(s):

8784703

Application Number:

13/275,595

Assignee:

Eastman Kodak Company (Rochester, NY)

Patent Classifications (CPCs):

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

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

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

C09K11/02 - Use of particular materials as binders, particle coatings or suspension media therefor
C09K11/565 - {with zinc cadmium}
C09K11/70 - containing phosphorus
C09K11/883 - {with zinc or cadmium}

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

H01L33/502 - {Wavelength conversion materials}

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DOE Contract Number:  

EE000979

Resource Type:

Patent

Resource Relation:

Patent File Date: 2011-10-18

Country of Publication:

United States

Language:

English

Subject:

77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY