P‐53: Control of EL Powder Phosphor Properties

Abstract

We report relatively low-temperature synthesis of ZnS:Cu,Al AC powder electroluminescent phosphor having smaller particle size comparing to commercial samples. Controlling synthesis conditions we were able to regulate phosphor's EL spectra and color coordinates and fabricate sample with frequency-controlled electroluminescence color. EL brightness of phosphors was significantly improved by electron beam irradiation in air atmosphere. Surface properties of powders were also studied and found to correlate with synthesis conditions and electroluminescence intensity, providing useful tool in phosphor optimization and quality control.

Quality Improvement of Concrete Articles

“…Samples were saturated by the silica sol solution on the third day of hardening process and then were examined. The process of saturating with silica was described using suggested above new parameter -absorption capacity, С, kg/m3, calculated according to equation (2).…”

“…It is well known that surface properties of construction materials, including acid-basic ones are very important [1][2][3][4][5]. The main idea of the paper is the possibility of improvement of quality of concrete articles by means of saturation and modification of their surface with silica sol solution.…”

Effect of Electron-Beam Induced Nanostructuring on Surface Properties and Radioluminescence of ZnS:Cu,Br Phosphors

“…In addition to the optimization of the synthesis conditions, a number of methods can be used for processing the charge mixture or ready phosphor in order to provide needed phosphor structure. The surface properties of phosphors largely influence electrophysical processes occurring in the phosphor grain, such as charge transfer and luminescence [1].…”

Effect of electron‐beam treatment of zinc sulfide on electroluminescent phosphor properties

“…The advantages of such devices are low power consumption, uniformity of luminescence, low weight, and thinness of the device. 1,2 The luminescence is excited in such phosphors by the application of an electric field with the formation of charge carriers in ZnS-Cu 2 S heterojunctions and their consequent recombination on the luminescence centers. The most common activator is copper, which participates both in the formation of heterojunctions and the formation of blue and green luminescence centers where charge-carrier recombination and light generation takes place.…”