The effect of temperature on the exciton absorption of copper chloride and copper bromide nanocrystals in potassium-aluminum-borate glass

Spectral properties of copper halide nanocrystals in glasses of fluorine-phosphate matrix

“…4), which has a hysteretic character. Points of this experimental curve were obtained with a step of 1°C [3]. In section I of the curve of heating from room temperature T 1 , the approach of the copper halide phase to the equilibrium state has a kinetic character, and the shape of the curve in this stage depends on the sample heating rate.…”

“…An increase in the amount of HCl introduced into the melt causes a red shift of the exciton absorption band. According to [3,5,8], this fact suggests an increase in the size of the nanocrystalline phase segregated in the glass matrix.…”

“…In recent years, the interest in materials based on semiconductor particles grown in the bulk of dielectric fluorine-phosphate glassy matrices [1][2][3] has been constantly increasing due to their mechanical, chemical, and thermal durability. Among the variety of semiconductor nanostructures, the most interesting one is considered to be monovalent copper chloride in view of the inverse arrangement of subbands of the valence band split under spin-orbit interaction [4].…”

“…Glasses containing CuCl nanocrystals are characterized by high nonlinear optical response and photochromism [5,6]. Currently, it is known that the nanocrystalline copper halide phase segregates in glasses of borate [3,6,7] and silicate [5,8] matrices.…”

“…In this design, a glass sample was placed in a thermocell with two quartz windows. The sample was illuminated by a deuterium lamp with a cw emission spectrum in the desired range, and the optical density spectra were recorded through the other window [3]. The spectra were recorded using an Avaspec-2048 fiber spectrometer (Avalar) with a step of 0.33 nm.…”