Synthesis And Visible、Near-infrared Photoelectric Property Of Bis-Cyclometalated Iridium Complexes With3-Acetyl Camphor As The Ancillary Ligand

Organic Light Emitting Diodes (OLEDs) have become a new hot spot in Flat Panel Display area gradually because of its Unparalleled Superiority. The design and synthesis of the three primary colors of red, green and blue light-emitting materials with excellernt Photoelectric Properties has been the core of research. On the other hand, in recent years, It is found that near-infrared electroluminescent materialas have potential use in optical communication networks such as low-cost NIR light sources and IR amplifiers and so on.The principle of electroluminescent materials and OLEDs structure are briefly introduced in this paper. Bis-Cyclometalated Iridium Complexes with blue, green, red and near-infrared spectra ate emphatically discussed.In this paper, the research work include the following four areas:1. Eight kinds of ligands,14kinds of complexes were Synthesized,including four kinds of blue phosphorescent material,two kinds of green phosphorescent material,six kinds of red phosphorescent material and two kinds of near-infrared phosphorescent material.Through analysis and comparision, the new blue,green,red,near-infrared phosphorescent material with excellent property were respectively accorded.(dfpypy)2Ir(acam),(dfpypy)2Ir(acac) are new and excellent-performance blue phosphorescent material,(ppy)2Ir(acam) is a new green light-emitting materials,(pq)2Ir(acam)’s emission peak is at667nm,which is a better luminescent material in these red phosphorescent materials.(btiq)2Ir(acac)and (btq)2Ir(acac) are new near-infrared phosphorescent materials synthesized for the first time, with not only simple structure,excellent performance but also potential applications value likely.2. The performances of complexes are improved and the complex’s quantum efficiency are enhanced in different degrees when sterically bulky3-Acetyl Camphor group was introduced as β-diketone auxiliary ligand.3.Something has been found in the research on optical and electrical properties and thermal stability of the complexes:①The emission wavelength of the complexes can be changed by changing the conjugation of the main ligand, introducing the heterocycle or the atoms with high electronegativity(such as:N, F) and so on.②The spectral redshift of quinoline complexes is more than that of isoquinoline complexes with the similar structure.③The temperature of the thermal decomposition of the complexes is about300℃when the complexes lose10%of their weight, which is helpful to the purification by sublimation method and the fabrication of the device.4.Nondoped and doped OLEDs have been respectively fabricated by using phosphorescent material (ppy)2Ir(acam),(dfpypy)2Ir(acam),(46dfppy)2Ir(acam),(btp)2Ir(acam),(piq)2Ir(acam). The EL spectroscopy, J-V-L characteristics, efficiency have been investigated and it has been found that it is an effective way to improve the device performance to introduce steric hindrance in auxiliary ligands.