Synthesis, the study of the structure of YAG and YAGG phosphors in the radiation field

Abstract

In the present work, an attempt is made to synthesize a phosphor using powerful hard radiation fluxes. The surface, elemental composition, structure, and luminescent characteristics of the obtained YAG:Ce ceramics were studied. Ceramics have a heterogeneous structure. The main phase of the obtained ceramics is YAG, which ranges from 72 to 91 % of the total volume of samples. The remaining volume of the samples consists of the Al2O3 and CeO2 phases. The synthesized ceramics has the characteristic properties of YAG:Ce, YAGG:Ce phosphors. The surface condition and elemental surface composition of the synthesized ceramic sample were studied using a scanning electron microscope. The images showed that there are particles with a well-defined faceting, which indicates the formation of microcrystals. X-ray diffraction analysis of the synthesized ceramic samples was carried out on a diffractometer. X-ray diffraction analysis showed that the resulting ceramic has a high degree of crystallinity. The quantitative phase dependence was determined in the TOPAS-4.2 program. The results of measuring the luminescence spectra measured upon excitation of the specimen split surface are presented. The maximum luminescence of YAG:Ce ceramics accounts for 555 nm, the half-width of the band is 0.45 eV. In YAGG:Ce ceramics, the luminescence maximum at 555 nm, the half-width of the band is 0.48 eV.