RED-EMITTING THERMALLY STABLE PHOTOLUMINESCENT BA₃BI₂(BO₃)₄:EU³⁺ FOR LED CHIPS

摘要

FIELD: physics.;SUBSTANCE: invention relates to production of radiation sources and relates to a red-emitting thermally stable photoluminescent Ba₃Bi₂(BO₃)₄ for LED chips. Photoluminescent Ba₃Bi₂(BO₃)₄ is doped with Eu³⁺ ions and belongs to family M₃Ln₂(BO₃)₄, where M=Ba, and the lantanoids (Ln) are substituted with trivalent bismuth. At that, Ba²⁺ and Bi³⁺ cations are disordered in three crystallographically nonequivalent positions of Ba₃Bi₂(BO₃)₄ crystal structure.;EFFECT: technical result consists in increasing optimal concentration of dopant ions and eliminating the need to use rare-earth ions in the crystalline structure of the photoluminescent matrix.;3 cl, 6 dwg