The present invention relates to light emitting materials including a novel Ir complex, where the Ir is provided with a primary ligand selected from phenyl pyridine ligands substituted with at least one Cl atom. Such light emitting materials have been found to have a significantly enhanced photoluminescence quantum yield over other Ir complexes with a phenyl pyridine ligand having no Cl atom, or even over those with a phenyl pyridine ligand having a halogen atom other than Cl, such as a Br or F atom, and as a result specifically improve the efficiency of a light emitting device. The present invention further relates to the use of such light emitting materials and an organic light emitting device including such light emitting materials.
                            本发明涉及包括一种新型Ir配合物的
发光材料,其中Ir具有从取代有至少一个Cl原子的苯基
吡啶配体中选择的主要
配体。这些
发光材料已被发现相对于没有Cl原子的苯基
吡啶配体的其他Ir配合物,甚至相对于具有除Cl原子以外的卤素原子(如Br或F原子)的苯基
吡啶配体的其他Ir配合物具有显着增强的光致发光量子产率,从而特别提高了发光器件的效率。本发明还涉及使用这种
发光材料和包括这种
发光材料的有机发光器件。