Some effects of heat treatment and electron irradiation on the cathodoluminescence spectra of CuInS2

Publisher Website
Google Scholar
Abstract
The cathodoluminescence spectra of sulfur‐saturated and sulfur‐deficient CuInS2 has been studied at 40 and 80 °K over the photon energy range 0.47⩽hν⩽2.0 eV. The spectrum of sulfur‐saturated specimens exhibits four distinct bands with maxima at approximately 1.55, 1.20, 0.80, and 0.60 eV. The spectrum of sulfur‐deficient samples consists of a band with a main peak at ∼0.60 eV and secondary maxima at ∼0.58 and ∼0.55 eV. When sulfur‐saturated samples are heated in vacuum, the spectrum changes gradually from the sulfur‐saturated form to the sulfur‐deficient form. High‐energy (10 MeV) electron irradiation on a sulfur‐saturated sample results in a reduction of intensity of the dominant 1.55‐eV band and a growth of a broad band with a maximum around 0.80 eV.