Synthesis of I-III-VI semiconductor nanoparticles and their applications

Abstract

In this thesis, the research work focused on the fabrication of I-III-VI semiconductor nanoparticles and their applications on biological cell labeling and hydrogen production by water splitting. Firstly, zinc-doped CuInS2 and AgInS2 nanoparticles with different shapes including the cube, sphere and heterodimer structures were prepared by hot-injection method. Corresponding photoluminescent (PL) properties of Zn-doped AgInS2 and CuInS2 nanoparticles were studied by lifetime measurement and ultrafast laser. The high quality two-photon PL was further used in the application of two-photon cell labeling. Secondly, Cu-In-Zn-S nanospheres and CuInZnS microstructures-graphene composites were prepared through a template-free hydrothermal method. The as-prepared product with tunable absorption was used as a photocatalyst for hydrogen production under the illumination of visible light, which displayed high photocatalytic efficiency.