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| 基于黄绿色铱磷光材料的高效有机电致发光器件 |
| Highly efficient organic electroluminescent devices based on iridium phosphorescent materials with yellow-green emission |
| Received:August 28, 2024 |
| DOI： |
| 中文关键词: 铱(III)配合物 磷光材料 黄绿光 发光性能 OLEDs器件 |
| 英文关键词: iridium(III) complexes phosphorescent material yellow-greenish luminescent properties OLEDs devices |
| 基金项目:国家自然科学基金(21861023)；云南省院士专家工作站(202505AF350100)；云南贵金属实验室科技计划项目(YPML-20240502079)；云南省金属有机分子材料与器件重点实验室项目(202205AD160053) |
| Author Name | Affiliation | | CHANG Qiaowen | State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co.Ltd., Kunming Institute of Precious Metals, Kunming 650106, China | | ZHANG Ke | State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co.Ltd., Kunming Institute of Precious Metals, Kunming 650106, China | | HUANG Guangying | State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co.Ltd., Kunming Institute of Precious Metals, Kunming 650106, China | | YAN Caixian | State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co.Ltd., Kunming Institute of Precious Metals, Kunming 650106, China | | LIU Weiping | State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co.Ltd., Kunming Institute of Precious Metals, Kunming 650106, China | | FENG Yangyang | Kunming Guiyan Chemical Materials Yunnan Co.Ltd., Kunming 650503, China | | HOU Wenming | Kunming Guiyan Chemical Materials Yunnan Co.Ltd., Kunming 650503, China |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 yellow-green 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. |
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