Highly efficient red phosphorescent iridium(III) complexes, (MPQ)₂Ir(Pppy) and (MPQ)₂Ir(TMSppy) based on 4-methyl-2-phenylquinoline (MPQ) as a cyclometalated main ligand and 2-[(1,1′-biphenyl)4-yl]pyridine (Pppy) or 2-[4-(trimethylsilyl)phenyl]pyridine (TMSppy) as a second cyclometalated ligand were synthesized for use in organic light-emitting diodes (OLEDs). The iridium(III) complex with MPQ and acetylacetone (acac) as an ancillary ligand, (MPQ)₂Ir(acac), was also synthesized for comparison. The geometrical configuration of the heteroleptic complex (MPQ)₂Ir(acac)is N,N-trans, whereas (MPQ)₂Ir(Pppy) and (MPQ)₂Ir(TMSppy)show all-facial geometries. Among the iridium(III) complexes, red OLEDs using the (MPQ)₂Ir(Pppy) exhibited significantly more improved luminance and external quantum efficiency with markedly prevented concentration self-quenching at high doping concentration by introduction of Pppy. Moreover, a high maximum external quantum efficiency (EQE_max) of 28.0% with a high color-rendering index (CRI) of 81 was achieved in the white OLEDs (WOLED) fabricated using the bis[2-(4,6-difluorophenyl)pyridinato-C²,N](picolinato)iridium(III) [FIrpic], tris(2-phenylpyridine)iridium(III) [Ir(ppy)₃], and (MPQ)₂Ir(Pppy), and it is one of the highest values among the reported three primary color component WOLED. Also, the WOLED fabricated using the (MPQ)₂Ir(Pppy) showed excellent spectral stability at different voltages.

基于4-甲基-2-苯基喹啉（MPQ）作为环金属化主要配体和2-[（（1 ）]的高效红色磷光铱（III）络合物（MPQ）₂ Ir（Pppy）和（MPQ）₂ Ir（TMSppy）合成了作为第二种环金属化配体的1，-联苯基）4-基]吡啶（Pppy）或2- [4-（三甲基甲硅烷基）苯基]吡啶（TMSppy），用于有机发光二极管（OLED）。还合成了以MPQ和乙酰丙酮（acac）为辅助配体的铱（III）配合物（MPQ）₂ Ir（acac）进行比较。杂配物（MPQ）₂ Ir（acac）的几何构型为N，N -trans ，而（MPQ）₂ Ir（Pppy）和（MPQ）₂Ir（TMSppy）显示所有面部几何形状。在铱（III）配合物中，使用（MPQ）₂ Ir（Pppy）的红色OLED表现出显着改善的亮度和外部量子效率，并通过引入Pppy显着防止了高掺杂浓度下的浓度自猝灭。此外，在使用双[2-（4,6-二氟苯基）制造的白色OLED（WOLED）中，实现了28.0％的高最大外部量子效率（EQE _max）和81的高显色指数（CRI）。 pyridinato-C ²，N ]（picolinato）铱（III）[FIrpic]，三（2-苯基吡啶）铱（III）[Ir（ppy）₃ ]和（MPQ）₂Ir（Pppy），它是报告的三种原色成分WOLED中的最大值之一。此外，使用（MPQ）₂ Ir（Pppy）制造的WOLED在不同电压下显示出出色的光谱稳定性。