Method for synthesis of blue-emitting ZnSe1-xTEx alloy nanocrystals

Patent metadata

Field	Value
Publication number	US-11753587-B2
Application number	US-201916422242-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	May 30, 2018
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

The invention relates to highly luminescent nanostructures, particularly highly luminescent nanostructures comprising a ZnSe 1-x Te x core and ZnS and/or ZnSe shell layers. The invention also relates to methods of producing such nanostructures.

First claim

What is claimed is:

1. A method of producing a ZnSe 1-x Te x nanocrystal comprising:
(a) admixing a selenium source and at least one ligand to produce a reaction mixture; and
(b) contacting the reaction mixture obtained in (a) with a zinc source and a solution comprising a tellurium source, a reducing agent, and a zinc carboxylate;

to provide a ZnSe 1-x Te x nanocrystal.

2. The method of claim 1 , wherein the selenium source in (a) is selected from the group consisting of trioctylphosphine selenide, tri(n-butyl)phosphine selenide, tri(secbutyl) phosphine selenide, tri(tert-butyl)phosphine selenide, trimethylphosphine selenide, triphenylphosphine selenide, diphenylphosphine selenide, phenylphosphine selenide, cyclohexylphosphine selenide, octaselenol, dodecaselenol, selenophenol, elemental selenium, hydrogen selenide, bis(trimethylsilyl) selenide, and mixtures thereof.

3. The method of claim 1 , wherein the zinc source in (b) is selected from the group consisting of diethylzinc, dimethylzinc, diphenylzinc, zinc acetate, zinc acetylacetonate, zinc iodide, zinc bromide, zinc chloride, zinc fluoride, zinc carbonate, zinc cyanide, zinc nitrate, zinc oxide, zinc peroxide, zinc perchlorate, and zinc sulfate.

4. The method of claim 1 , wherein the tellurium source in (b) is selected from the group consisting of trioctylphosphine telluride, tri(n-butyl)phosphine telluride, trimethylphosphine telluride, triphenylphosphine telluride, tricyclohexylphosphine telluride, elemental tellurium, hydrogen telluride, bis(trimethylsilyl) telluride, and mixtures thereof.

5. The method of claim 1 , wherein the reducing agent in (b) is selected from the group consisting of diborane, sodium hydride, sodium borohydride, lithium borohydride, sodium cyanoborohydride, calcium hydride, lithium hydride, lithium aluminum hydride, diisobutylaluminum hydride, sodium triethylborohydride, and lithium triethylborohydride.

6. The method of claim 1 , wherein the zinc carboxylate in (b) is selected from the group consisting of zinc oleate, zinc hexanoate, zinc octanoate, zinc laurate, zinc myristate, zinc palmitate, zinc stearate, zinc dithiocarbamate, or mixtures thereof.

7. The method of claim 1 , further comprising:
(c) contacting the reaction mixture in (b) with a zinc source and a selenium source.

8. The method of claim 7 , wherein the zinc source in (c) is selected from the group consisting of diethylzinc, dimethylzinc, diphenylzinc, zinc acetate, zinc acetylacetonate, zinc iodide, zinc bromide, zinc chloride, zinc fluoride, zinc carbonate, zinc cyanide, zinc nitrate, zinc oxide, zinc peroxide, zinc perchlorate, and zinc sulfate.

9. The method of claim 7 , wherein the selenium source in (c) is selected from the group consisting of trioctylphosphine selenide, tri(n-butyl)phosphine selenide, tri(secbutyl) phosphine selenide, tri(tert-butyl)phosphine selenide, trimethylphosphine selenide, triphenylphosphine selenide, diphenylphosphine selenide, phenylphosphine selenide, cyclohexylphosphine selenide, octaselenol, dodecaselenol, selenophenol, elemental selenium, hydrogen selenide, bis(trimethylsilyl) selenide, and mixtures thereof.

10. The method of claim 1 , wherein the selenium source in (a) is trioctylphosphine selenide, the zinc source in (b) is diethylzinc, the tellurium source in (b) is trioctylphosphine telluride, the reducing agent in (b) is lithium triethylborohydride, and the zinc carboxylate in (b) is zinc oleate.

11. The method of claim 7 , wherein the selenium source in (a) and (c) is trioctylphosphine selenide, the zinc source in (b) and (c) is diethylzinc, the tellurium source in (b) is trioctylphosphine telluride, the reducing agent in (b) is lithium triethylborohydride, and the zinc carboxylate in (b) is zinc oleate.

Assignees

• Nanosys Inc

Inventors

• Ippen Christian
• Truskier Jonathan
• Manders Jesse

Classifications

• C09K11/025 Primary

  non-luminescent particle coatings or suspension media · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C09K11/883 Primary

  with zinc or cadmium · CPC title

• C09K11/88

  containing selenium, tellurium or unspecified chalcogen elements · CPC title

• C01B19/007

  Tellurides or selenides of metals (C01B19/002 takes precedence) · CPC title