| 一种新型可旋涂的磷光铱(III)配合物的合成及其在OLED器件中的性能研究 |
| Synthesis and properties of new Iridium (III) complex based OLED by spin-coating process |
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| 摘要: 本文以1-(6-(9-咔唑基)己基)-2-苯基咪唑(Czhpi)为主配体，2-(5-(4-氟苯基)-1,3,4-三唑)吡啶(fpptz)为辅助配体，合成了一种溶解性好的可用于湿法旋涂制备有机电致发光器件的新型磷光铱(III)配合物(Czhpi)2Ir(fpptz)。通过紫外-可见吸收光谱、发射光谱、低温磷光光谱及热重分析对其光物理性质和热稳定性进行了研究。实验结果表明： (Czhpi)2Ir(fpptz)的三线态能级(ET) 为2.63 eV；失重5 %时的温度为356 ℃。将配合物(Czhpi)2Ir(fpptz)掺杂在mCP中，作为发光层，经湿法旋涂制备了有机发光二极管器件。结果显示，该器件的最大电致发光谱峰位于523 nm，最大电流效率约2.82 cd/A, 最大功率效率为3.52 lm/W, 色坐标显示在(0.31, 0.41) 附近。因此，(Czhpi)2Ir(fpptz)是一种可用于湿法制备有机电致发光器件的黄绿光磷光材料。 |
| 关键词: 铱(III)配合物 光电特性 溶解性 旋涂 黄绿光磷光材料 |
| 基金项目: 国家自然科学基金;教育部重大项目；国家国际科技合作专项资助；山西省科技创新重点团队 |
| Abstract: In this paper, a new kind of good solubility heteroleptic iridium(III) complex (Czhpi)2Ir(fpptz) that can be used in the preparation of OLED devices through spin-coating was synthesized. In this compound, Czhpi (1-(6-(9-Carbzolyl)hexyl)-2-phenylimidazole) as the main ligand and fpptz (2-(5-(4-fluorophenyl)-2H-1,2,4-triazol-3-yl) as the auxiliary ligand were designated respectively. Here, N-hexyl carbazole was introduced in the main ligand aims to improve the solubility. The photophysical properties and thermostability of (Czhpi)2Ir(fpptz) were investigated by ultraviolet-visble absorption spectrum, photoluminescence spectrum at room temperature, phosphorescent spectra at 77 K and thermogravimetry, respectively. The triplet state energy (ET) of (Czhpi)2Ir(fpptz) was close to 2.63 eV. TGA curve observed that the temperature is 356℃ when it loss 5% weight. Finally, Organic light-emitting diodes (OLEDs) were prepared using (Czhpi)2Ir(fpptz) doped in mCP as the emitting layer by the spin-coating process. The electroluminescent devices exhibited an electroluminescence (EL) maximum at 523 nm, a maximum current efficiency of about 2.82 cd/A, a maximum power efficiency of 3.52 lm/W, and International Commission on Illumination (CIE) coordinates of (0.31, 0.41), respectively. A novel yellow green light phosphorescent material for OLEDs through spin-coating process was realized. |
| Keywords: Iridium(III) complex Optoelectronic characteristic solubility Spin-coating Yellow green phosphorescence material |
| 投稿时间：2014-04-14 修订日期：2014-07-16 |
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