Group 13 Selenide Nanoparticles

Patent metadata

Field	Value
Publication number	US-2016233373-A1
Application number	US-201615099282-A
Country	US
Kind code	A1
Filing date	Apr 14, 2016
Priority date	Jul 9, 2012
Publication date	Aug 11, 2016
Grant date	—

Abstract

A method of preparing Group XIII selenide nanoparticles comprises reacting a Group XIII ion source with a selenol compound. The nanoparticles have an M x Se y Semiconductor core (where M is In or Ga) and an organic capping ligand attached to the core via a carbon-selenium bond. The selenol provides a source of selenium for incorporation into the semiconductor core and also provides the organic capping ligand. The nanoparticles are particularly suitable for solution-based methods of preparing semiconductor films.

First claim

What is claimed is:

1 . A method of forming a semiconductor film, the method comprising:
co-depositing CuSe nanoparticles and Group 13 selenide nanoparticles on a substrate; and, heating the substrate to a temperature sufficient to melt the CuSe nanoparticles and the Group 13 selenide nanoparticles; wherein the Group 13 selenide nanoparticles comprise a Group 13 selenide semiconductor and an organic capping ligand bound to the nanoparticle by a carbon-selenium covalent bond and, wherein the temperature is sufficient to remove the organic capping ligand.

2 . The method of claim 1 wherein the organic capping ligand is an alkyl, alkenyl, alkynyl, or aryl group.

3 . The method of claim 1 wherein the semiconductor film is substantially free of sulfur.

4 . The method of claim 1 wherein the Group 13 selenide nanoparticles are prepared by a method comprising:
reacting a Group 13 ion precursor with a selenol compound.

5 . The method of claim 4 wherein the Group 13 ion precursor is a chloride, acetate, or acetylacetonate of a Group 13 element.

6 . The method of claim 4 wherein the Group 13 ion precursor is selected from the group consisting of InCl 3 , In(OAc) 3 , In(acac) 3 , GaCl 3 , Ga(OAc) 3 and Ga(acac) 3 .

7 . The method of claim 4 wherein the selenol compound is an alkyl, alkenyl, alkynyl, or aryl selenol.

8 . The method of claim 4 wherein the selenol compound contains 4 to 14 carbon atoms.

9 . The method of claim 4 wherein the selenol compound is octane selenol.

10 . The method of claim 4 further comprising adding a second selenium compound to the Group 13 ion precursor.

11 . The method of claim 10 wherein the second selenium compound is a trioctylphosphine selenide.

12 . The method of claim 4 wherein the selenide nanoparticles have diameters less than about 200 nm.

13 . The method of claim 4 wherein the selenide nanoparticles have diameters of about 2 to about 100 nm.

14 . The method of claim 4 wherein the selenide nanoparticles have diameters less than about 10 nm.

Assignees

• Nanoco Technologies Ltd

Inventors

• Gresty Nathalie
• Masala Ombretta
• Newman Christopher
• Whitelegg Stephen
• Pickett Nigel

Classifications

• H10P14/3461

  Nanoparticles · CPC title

• H10P14/3436

  being chalcogenide semiconductor materials not being oxides, e.g. ternary compounds · CPC title

• H10P14/265

  using solutions · CPC title

• H10F77/1433

  Quantum dots · CPC title

• H10F77/126

  comprising only Group I-III-VI chalcopyrite materials, e.g. CuInSe2, CuGaSe2 or CuInGaSe2 [CIGS] · CPC title