LED phosphor comprising bow-tie shaped A₂N₆ building blocks

摘要

The invention provides, amongst others for application in a lighting unit, a phosphor selected from the class ofM₂D₂C_2-2bB_bA₂N₆:Ln  (I)withM=selected from the group consisting of divalent Ca, Sr, and Ba;D=selected from the group consisting of monovalent Li, divalent Mg, Mn, Zn, Cd, and trivalent Al and Ga;C=selected from the group consisting of monovalent Li and Cu;B=selected from the group consisting of divalent Mg, Zn, Mn and Cd;A=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf;Ln=selected from the group consisting of ES and RE;ES=selected from the group consisting of divalent Eu, Sm and Yb;RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; and0≤b≤1.