Influence of the presence of a fluxing agent and its composition on the spectral characteristics of ZnS(Cu) obtained by self-propagating high-temperature synthesis
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2016, Vol 19, Issue 3
Abstract
Investigated in this work were the photoluminescence spectra and luminescence excitation spectra of powered ZnS:Cu, obtained using the method of self-propagating high-temperature synthesis (SHS) with addition of NaCl and MgCl2 as a fluxing agent into the charge and without them. It was shown that increasing the amount of fraction with the particle sizes ≤5 nm in powdered ZnS:Cu-SHS, where fluxing agents are present in the charge, is caused by the decrease in temperature inside the reactor in the course of the synthesis reaction. Besides, related increasing the intensity of the PL blue band with λmax ~ 450…465 nm in powdered ZnS:Cu-SHS/MgCl2, which is associated with redistribution of the copper impurity in the bulk of microcrystals, probably, occurring as a result of increasing the partial pressure of Cl during synthesis.
Authors and Affiliations
Yu. Yu. Bacherikov, O. B. Okhrimenko, A. G. Zhuk, R. V. Kurichka, A. V. Gilchuk
Keywords
Related Articles
- EP ID EP178261
- DOI 10.15407/spqeo19.03.303
- Views 97
- Downloads 0
Optical properties of ternary alloys MgZnO in infrared spectrum
Properties of thin films of ternary alloys Mg х Zn 1–х O on the optically-anisotropic Al 2 O 3 substrates in the area of “residual rays” of film and substrate are first investigated using the method of infrared spectrosc...
Synergetics of the instability and randomness in formation of gradient modified semiconductor structures
The criteria for formation of an inhomogeneous structure based on vitreous Ge 2 S 3 with modifiers Al, Bi, Pb, Te that are identified due to changes in the condensed medium (evaporation temperature, condensation velocity...
Luminescent properties of fine-dispersed self-propagating high-temperature synthesized ZnS:Cu,Mg
The influence of magnesium impurities on luminescent properties of ZnS:Cu,Mg using obtained by self-propagating high-temperature synthesis (SHS) has been investigated. Special attention was paid to changes of photolumine...
London forces in highly oriented pyrolytic graphite
Surface of highly oriented pyrolytic graphite with terrace steps was studied using scanning tunneling microscopy with high spatial resolution. Spots with positive and negative charges were found in the vicinity of the st...
Polyvinylcarbazole films: Applications for chemical sensors
The adsorption properties of polyvinylcarbazole (PVC) films as sensitive layers of quartz crystal microbalance (QCM) sensors have been studied. Different organic vapors and complex mixture (a cologne) were tested as anal...