SYNTHESIS AND STUDY OF LUMINESCENT CHARACTERISTICS OF GaBO3: Yb3+

Abstract

Abstract. Introduction. Borates of rare earth elements attract attention due to their unique physical
properties due to the peculiarities of their electronic structure and crystal lattice. Ytterbium orthoborates
are of great practical importance in the field of infrared luminescence. The aim of the work. Investigation
of the structure, phase composition and luminescent properties of GaBO3-based solid solutions doped with
ytterbium ions. Methodology. Ga1-xYbxBO3 (x = 0, 0.005, 0.01, 0.02, 0.03, 0.05, 0.06 and 1) were obtained
by solid-phase synthesis. Results and discussions. SEM EDS analysis showed that 1 mol.% Yb dissolves
in GaBO3 at a temperature of 700°C and 2 mol.% Yb at temperatures of at 800 and 900°C. The results of
diffusion experiments indicate that the maximum is 2 mol.% of Yb ions can be dissolved in gallium
borate. These data are consistent with the results of X-ray phase analysis, showing that the ytterbium
content is over 2 mol.%, significant impurities and signs of incomplete synthesis are observed.
Conclusion. The Ga0.995Yb0.005BO3 and Ga0.99Yb0.01BO3 compounds exhibit stable luminescent properties
with broad peaks at 919 nm and 970 nm. These results highlight the potential of the materials for
applications in optoelectronics and photonics.