The invention provides phosphorescent organometallic complexes. The complexes of the invention may be prepared as films further comprising a charge carrying host material may be used at an emissive layer in organic light emitting devices. In one embodiment, the complex is a hyper-branched organoiridium complex comprising a 2-phenylpuridine ligand wherein the phenyl ring or the pyridine ring contains 4 non-hydrogen substituents. In another embodiment, the complex is an organoiridium complex comprising a substituted 2-phenyl pyridine ligand, wherein at least one substituent contains a spiro group.
本发明提供了荧光有机
金属配合物。该发明的配合物可制备为薄膜,进一步包括载荷承载宿主材料,可用作有机发光器件中的发射层。在一种实施例中,该配合物是一种超支化
有机铱配合物,包括2-
苯基嘧啶配体,其中苯环或
吡啶环含有4个非氢基取代基。在另一种实施例中,该配合物是一种
有机铱配合物,包括取代的
2-苯基吡啶配体,其中至少一个取代基含有螺环基团。