Purdue Research Foundation

Qijie Guo

Rakesh Agrawal

Hugh W Hillhouse

Nanoparticle compositions and methods for synthesizing multinary chalcogenide CZTSSe nanoparticles containing Cu, Zn, and Sn in combination with S, Se or both are described. The nanoparticles may be incorporated into one or more ink solutions alone or in combination with other chalcogenide-based particles to make thin films useful for photovoltaic applications, including thin films from multilayer particle films having a composition profile. The composition and stoichiometry of the thin films may be further modified by subjecting the particle films to gas or liquid phase chalcogen exchange reactions.

Synthesis of multinary chalcogenide nanoparticles comprising Cu, Zn, Sn, S, and Se

A method of fabrication of thin films for photovoltaic or electronic applications is provided. The method includes fabricating a nanocrystal precursor layer and selenizing the nanocrystal precursor layer in a selenium containing atmosphere. The nanocrystal precursor layer includes one of CuInS, CuIn(S,Se), CuGaS, CuGa(S, Se), Cu(InGa)S, and Cu(InGa)(S, Se)nanoparticles and combinations thereof, wherein 0&#x2266;x&#x2266;1 and 0&#x2266;y&#x2266;1.

[object Object]

A method for synthesizing a chalcogenide nanoparticle is provided. The method comprises reacting a metal component with an elemental chalcogen precursor in the presence of an organic solvent. The chalcogenide nanoparticles include ternary, binary and/or multinary chalcogenide nanoparticles and the metal component comprises metal halides or elemental metal precursors. The alkylamine solvent has a normal boiling temperature of above about 220&#xb0; C. and an average particle size of from about 5 nm to about 1000 nm.

Growing community of inventors

West Lafayette, IN, United States of America

Qijie Guo