| abstract |
The present invention relates to a compound containing an anionic framework structure, a dopant and a cation, wherein a. the anionic framework structure is characterized by a coordination tetrahedron GL4-, wherein G represents ruthenium, which may be C, Ge, B, Al or In is partially substituted, and L represents N and O, with the proviso that N constitutes at least 60 atomic % of L, b. the cations are selected from alkaline earth metals, with the proviso that 锶 and 钡 together constitute the cation 50 The atomic % or 50 atomic % or more, c. The dopant present is trivalent europium or a mixture of trivalent europium and divalent europium, and the charge compensation of d. germanium doping occurs by: i) by alkali metal Corresponding replacement of the alkaline earth metal cation by the cation, and/or ii) corresponding increase in nitrogen content, and/or iii) corresponding reduction of the cations, a method of preparing such compounds; and their use as conversion phosphors. |