Preparation technology and photoluminescence properties of CdTe nanocrystals in colloidal solutions and polymeric matrices

An analysis of physical mechanisms responsible for the influence of stabilizer type and ambient material on CdTe nanocrystal growth rate and passivation effectiveness of surface dangling bonds has been carried out. The possibility to change properties of nanocrystals by changing the stabilizer type has been shown

Influence of the dispersion environment nature on photoluminescence properties of CdTe nanocrystals in colloidal solutions

The physico-chemical properties of low-dimensional structures based on CdTe obtained in the course of colloidal synthesis have been investigated. Analyzed have been the main photoluminescence characteristics of CdTe nanocrystals, which are stabilized by thioglycolic acid and obtained using the deionized water and aqueous solutions of ethylene glycol and glycerol with different concentrations as dispersion environment. It has been shown that stability of colloidal solutions of CdTe nanocrystals depends on the nature of dispersion environment and concentration of stabilizer

Peculiarities of ZnSe dissolution in H₂O₂—HBr -ethylene glycol (oxalic acid) etchant compositions

The process of chemical treatment of undoped and doped ZnSe crystals surfaces by bromine emerging solutions has been investigated. The depending of dissolution rate on the etchants composition, their mixing and temperature has been studied. Concentration bounds of polishing solutions have been determined. The surface state after chemical etching has been established using electron microscopy and low temperature photoluminescence. The etchants compositions for semiconductors chemical polishing have been optimized. The comparative characteristics of two etching compositions H₂O₂—HBr —ethylene glycol and H₂O₂—HBr —oxalic acid have been shown to obtain high-quality polished surface of zinc selenide