Akademik Məlumat İdarəetmə Sistemi
Nanotechnologies in Russia, vol.10, no.9-10, pp.794-801, 2015 (Scopus)
Experimental results devoted to obtaining nanoparticles based on GaSe crystals; the analysis of the structure; and studies of their electrical, optical, and photoluminescent characteristics are presented. Nanoparticles and thin films GaSe of on a glass substrate are grown by hydrochemical precipitation from a solution containing sodium selenosulfate and gallium chloride. As substrates we chose glass and GaSe crystals grown by Bridgman method. The studies of the internal morphology and structure of the samples have been carried out using X-ray diffraction analysis (XRD), atomic force microscopy (AFM), spectroscopy of X-ray dispersed energy (EDAX), and scanning electron microscopy (SEM). The absorption spectra were measured with the help of a JOBIN-YVON monochromator with a diffraction grating and subsequent detection by a FEU-100. The photoluminescence spectra were studied with a Cary Eclipse spectrophotometer. It is established by X-ray structural analysis that the nanoparticles belong to the β modification of GaSe (a = 3.75 Å, c = 15.94 Å) with a hexagonal structure. The dependence of GaSe electroconductance on GaSe substrate on the temperature and the voltage–current characteristics of GaSe on glass substrate and on GaSe substrate are studied. The band-gap width of nanoparticles and the activation energies of impurity levels located in the band gap are determined on the basis of the spectral dependence.