【摘要】 黄绿色铱磷光材料可用于白光有机发光二极管（OLEDs）研制。以2,4-双（3,5-二甲基苯基）吡啶[2,4-（3,5-dmp）₂py]为主配体，乙酰丙酮（acac）为辅助配体，合成出铱磷光材料[2,4-（3,5-dmp）₂py]₂Ir（acac）。通过元素分析、核磁共振谱(包括¹H-NMR和¹³C-NMR)以及单晶X射线衍射，对该材料的组成和空间结构进行了表征，光物理性能研究显示该铱磷光材料是一种潜在的黄绿光（565 nm）发射磷光材料（量子产率79%），具有较好的热稳定性，热分解温度为356℃，能够满足OLED使用要求。进一步以制备得到的铱磷光材料作为客体材料，制备了OLEDs器件。经过对铱磷光材料掺杂浓度的细致优化，发现在5%的掺杂浓度下，OLED器件的性能达到最优，实现了高效的黄绿光发射。该器件的电致发光波长为564 nm，在CIE色坐标的位置为（0.4856,0.5083）。该器件具有卓越的电致发光性能，在构建高性能互补色白光OLED器件方面具有较好的应用前景。更多还原

【Abstract】 Iridium phosphorescent complexes with yellow-green emission can be used in organic white light-emitting diodes （OLEDs）.In this work,[2,4-（3,5-dmp）₂py]₂Ir（acac）,an iridium complex,was synthesized by using 2,4-bis（3,5-dimethylphenyl）pyridine as a cyclometal ligand and acetylacetone as an auxiliary ligand.The composition and spatial structure of the complex were characterized via elemental analysis,nuclear magnetic resonance spectroscopy （including 1H-NMR and 13C-NMR）,and single crystal X-ray diffraction.The study on photophysical properties showed that the complex was a potential yellowgreen emitting phosphorescent material with a maximum emission wavelength at 565 nm and a quantum yield of 79%in dichloromethane solution.The complex also exhibited good thermal stability with a thermal decomposition temperature of 356℃,meeting the requirements of OLED.Furthermore,OLEDs devices were prepared using the complex as the guest material.The performance of OLED devices reached an optimal level at 5% doping concentration of the complex,achieving efficient yellow-green light emission.The electroluminescence wavelength of this device was 564 nm,located at the CIE color coordinates of（0.4856,0.5083）.This device has excellent electroluminescence performance and good application prospects in building high-performance complementary color white OLED devices.更多还原