Organometallic complexes which bear at least one ligand which has a unit having a triplet energy of at least 22 000 cm−1, a process for preparing the organometallic complexes, a mixture comprising at least one of these organometallic complexes, the use of the organometallic complexes or of the mixture in organic light-emitting diodes, the organometallic complexes preferably being used as emitter materials, and specific nitrogen- or phosphorus-substituted triphenylene derivatives and a process for their preparation, the organometallic complex including a monoanionic bidentate ligand of formula (IIa)
含有至少一种
配体,其具有至少22,000 cm-1的三重态能量单位的有机
金属配合物,制备这些有机
金属配合物的方法,包含至少一种这些有机
金属配合物的混合物,使用这些有机
金属配合物或混合物在有机电致发光二极管中的用途,有机
金属配合物优选用作发射材料,并具有特定的氮或
磷取代三苯基衍
生物和其制备方法,其中有机
金属配合物包括公式(IIa)的单阴离子双齿
配体。