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

Authors

  • Zh. Karipbaev
  • D. Musakhanov
  • V. Lisitsyn
  • G. Alpyssova
  • M. Golkovskii
  • L. Lisitsynа
  • A. Tulegenova
  • A. Akylbekov
  • A. Dauletbekova
  • K. Balabekov
  • А. Kozlovskii
  • A. Usseinov

DOI:

https://doi.org/10.31489/2019ph4/24-29

Keywords:

white LEDs, yttrium-aluminum garnet, phosphor, ceramics, synthesis 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.

Additional Files

Published

2019-12-30

Issue

Section

PHYSICS OF THE CONDENSED MATTER

Received

2023-11-21