Methods for making doped and undoped copper chalcopyrite nanoparticles and thin films thereof

摘要

A method of forming CuFeS2 chalcopyrite nanoparticles. The method includes, in the presence of one or more ligands, reacting an iron-containing compound, a copper-containing compound and a sulfur-containing compound to form CuFeS2 chalcopyrite nanoparticles; and wherein at least one of the ligands forms a coordination complex with copper, and at least one of the ligands forms a coordination complex with iron. Also a method of forming metal-doped CuFeS2 chalcopyrite nanoparticles such as Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a CuFeS2 chalcopyrite nanoparticle layer on a substrate. Also, a composition of matter including Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a Zn-doped CuFeS2 chalcopyrite nanoparticle layer on a substrate.

主权项

1. A method, comprising:
forming an anhydrous first solution of an iron-containing compound and a copper-containing compound in a first solvent, said first solvent including one or more primary alkyl amines; forming a second anhydrous solution of a sulfur-containing compound in a second solvent, said second solvent including one or more alkyl amines; heating said first solutions to a nucleation temperature; after said heating, adding said second solution to said first solution to form CuFeS2 chalcopyrite nanoparticles; maintaining said mixture of said first solution and said second solution at said nucleation temperature for a predetermined length of time; after said predetermined length of time, cooling said mixture of said first solution and said second solution to a second temperature that is less than said nucleation temperature; after said mixture reaches said second temperature adding a quenching solvent to said mixture; and purifying said CuFeS2 chalcopyrite nanoparticles.