INFRARED LUMINOPHORES BASED ON KSrY(BO) ORTHOBORATE, DOPED WITH Er, AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2024 - IPC C09K11/55 C09K11/63 C09K11/78 C01F17/32 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and can be used in making luminescent materials or arrays for light-emitting diodes emitting light in the ultraviolet-visible and infrared ranges. Infrared phosphors based on orthoborate KSrY(BO₃)₂, doped with Er³⁺, the compositions of which correspond to chemical formula KSrY_1-xEr_x(BO₃)₂ (0.01≤x≤1), is obtained by two-step solid-phase synthesis. First, a mixture of components is prepared: K₂CO₃, SrCO₃, H₃BO₃, Y₂O₃ and Er₂O₃, taken in stoichiometric ratio. At the first stage, the obtained mixture is heated at 600-650 °C for 5-7 hours, and for the second – at 880-900 °C for 10-12 hours. Invention widens the range of luminophores having photoluminescent properties in the infrared region of the spectrum.

EFFECT: obtained phosphors are characterized by emission of 1,525-1,575 nm in the near infrared range when excited with a semiconductor laser with wavelength of 450 nm.

2 cl, 4 dwg, 1 ex