| abstract |
The present invention relates to a rare earth europium complex and its application as a light emitting material. The europium complex structure formula is Eu (ND) x A y L m . Wherein ND is a 4-hydroxy-1,5-naphthyridine based anionic ligand, A is other anionic ligand, L is a neutral ligand, x = 1, 2 or 3, y = 0, 1 or 2 X + y = 3; m = 1, 2 or 3; Such a europium complex has a high efficiency in light emitting quantum yield, excellent thermal stability, excellent carrier transfer effect, and can be used as a light emitting and electroluminescent material. |