β-二酮类铱配合物的合成、表征及光电性能测试

Synthesis, Characterization and Photoelectric Properties of β-Diketone Ruthenium Complexes

摘要:

以5-甲基-2-苯基吡啶（CH3ppy）为主配体，3,7-二乙基-4,6-壬二酮（detd）、2,2,6,6-四甲基-3，5-庚二酮（tmd）和乙酰丙酮（acac）为辅助配体（LX），设计合成了三种含-二酮类辅助配体的绿色磷光金属铱配合物（Ⅲ,Ⅳ,Ⅴ）。通过1HNMR和元素分析对其结构进行了表征，通过UV-vis光谱和荧光发射光谱（PL）测得化合物Ⅲ、IV、V的最大吸收波长范围在250 nm~280 nm之间，最大发射波长分别为530.8 nm、534.2 nm和524.8 nm。制备了器件结构为：ITO/HAT-CN (15nm)/TAPC (50nm)/TCTA (5nm)/TCTA:X (8%,15 nm)/Bepp2 (35nm)/LiF (1nm)/Al (150nm)的有机发光二极管（OLEDs）。结果表明，以化合物Ⅲ制备的器件亮度可以达到59125.2 cd/m2，最大外量子效率为15.0%，最大电流效率为53.8 cd/A，最大功率效率为62.1 lm/W，色坐标（0.30，0.62），是三个器件中综合性能最好的。

Abstract:

Three kinds of green light-emitting iridium complexes (Ⅲ,Ⅳ,Ⅴ) were designed and synthesized using 5-methyl-2-phenylpridine (CH3ppy) as main ligand, 3,7-diethyl-4,6-nonanedione (detd), 2,2,6,6-tetramethyl-3,5-heptanedione（tmd）and acetylacetone (acac) as three ancillary ligands (LX), respectively. These compounds were characterized by 1HNMR, elemental analysis. The maximum absorption wavelengths of compounds III, IV, and V measured by UV-vis spectrum were between 250nm and 280 nm, and the maximum emission wavelengths of compound III, IV, and V measured by fluorescence emission spectrum (PL) were 530.8nm, 534.2nm and 524.8nm. Phosphorescent organic light-emitting diodes with the prepared complexes were constructed. The configurations of the devices are ITO/HAT-CN (15nm)/TAPC (50nm)/TCTA (5nm)/TCTA: X (8%, 15 nm)/Bepp2 (35nm)/LiF (1nm)/Al(150nm). The device based on compound Ⅲ exhibits the best overall performance in three devices. It has a brightness of 59125.2 cd/m2. In addition, it shows a maximum external quantum efficiency of 15.0%, a maximum current efficiency of 53.8 cd/A, and a maximum power efficiency of 62.1 lm/W with chromaticity coordinates x=0.30,y=0.62.