Abstract

An In–CuInS₂ nanocomposite film has been prepared by Pulsed Laser Deposition applying a single source precursor. X-ray powder diffraction, Raman spectroscopy and transmission electron microscopy observations evidence that the film consists of nanocrystals of elemental In and chalcopyrite type CuInS₂ with sizes of 36 and 17 nm respectively. A detailed analysis of the electrical performance of the film suggests that the nanoparticles are in Ohmic contact and that the resistivity is mainly caused by the CuInS₂ nanocrystals which are less conducting than the pure In metal. Irradiation of the film with light shows a photoconductive effect mainly with wavelengths larger than 515 nm and smaller than 850 nm.

Graphical abstract