FLUORESCENT DIAMOND AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC C09K11/65 C09K11/59 C09K11/60 C09K11/66 C01B32/26 C01B32/28 C30B29/04 C30B33/04 

FIELD: production of fluorescent diamonds.

SUBSTANCE: invention is related to a method for producing fluorescent diamond containing an MV centre in a concentration of 1×10¹⁴/cm³ or higher, where M is selected from a metal or metalloid such as Si, Ge, Sn, Pb, Ni or Co, and V represents a vacancy. The first stage involves the synthesis of diamond by chemical vapor deposition (CVD) or detonation, for example an inward explosion, introducing from 0.0001 to 1 at% of the specified metal or metalloid and additionally ensuring the presence of a metal or metalloid other than M, for example Fe, Co or Ni. In the second stage, the resulting diamond containing M is irradiated with a high-energy beam, for example a beam of He or H ions, or an electron beam to form the V vacancy. After this, the diamond is annealed to form a fluorescent MV centre.

EFFECT: resulting fluorescent diamond is characterized by high luminous efficiency and low background fluorescence due to the specified concentration of MV centres and M content, as well as due to the V to M ratio from 0.1 to 10,000; concentration of nitrogen-vacancy centres (NV-centers) 1×10¹⁷/cm³ or lower and vacancy densities from 1×10¹⁶ to 3×10²¹/cm³.

12 cl, 14 dwg, 3 ex