Structural properties of sulfur copper (CuS) nanocrystals grown by chemical bath deposition

Crystalline native defects in ZnO analyzed by photoluminescence applying Maxwell-Boltzmann statistics in the visible region

“…These experimental results are generally concerned with high lifetimes [15,16]. The presence of a detectable PL emission bands in the nanocristal, characterized by the presence of ZnO, demonstrates that Zn 2+ cation are already optically active in this crystalline configuration.…”

“…The experimental emission band recorded here, they are asymmetric implies different signals overlapping each other. We performed an analysis of nanocrystal emission bands located at UV-Vis region, applying the statistical theoretical model based on Maxwell-Boltzmann (MBM) distributions, in this context, several detailed studies have been carried out [15,16,51]. The emission band applying the MBM is indicated by a sky blue stripe.…”

“…The Chemical Bath Deposition (CBD) technique, has been successfully applied at chemical synthesis of nanocrystals because it is versatile and relatively inexpensive, in which the chemical parameters of crystal growth are easily experimentally controlled [17]. Previous report, we systematically presented experimental details on the chemical synthesis to prepare rare earth and oxide-hydroxide transition metal and semiconductor nanocrystals [14,15,18].…”

“…The key chemical and physical parameters in CBD technique are systematically investigated with the aim of locating optimal conditions in small ranges of reaction temperature, dilute concentrations of precursor reagents, pH, etc. [14,15,17,18,19]. The chemical synthesis, is carried out in small temperature range located at 20 − 90 ± 2 • C, kinetic mechanism presents by us is based on the indirect chemical synthesis of coordination complex [M (NH 3 ) 4 ] 2+ ion M = Pb 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Bi 3+ , Er 3+ , etc.…”

“…We further note that in this study we used the experimental results previously published [14]. Using the spectra obtained through the Photoluminescence spectroscopic technique located at UV-Vis region, the emission bands are assigned to crystalline defects associated with vacancies, intertices, stacking faults, different pollutants, stoichiometry, etc., are examined to find the correlation of these emission signals with the native crystalline defects [15]. Applying the theoretical model of Maxwell-Boltzamann statistics (MBM), the native defects are associated with vacancies/interstices, which in a first approximation are considered as particles that present corpuscular behavior [16].…”