Design, Synthesis And Properties Of The New Phosphorescent Materials Containing POSS Core

In the early1950s People have an initial understanding of the research and developmentof light-emitting electroluminescent technology. The research hot sport focused on the studyof design and development of the electroluminescent light-emitting materials and thepreparation of luminescent materials research, which is mainly due to the organicelectroluminescent devices (Organic light-emitting diodes, OLEDs) has many superiorfeatures as LED, such as OLED materials with beautiful color in terms of color, low voltagedrive in energy efficiency and more absolute advantage in terms of perspective. It had beenreferred to as fourth-generation flat panel display technology with giving so many superiorcharacteristics. Currently, it is in the industrialization process.From the metal complexes luminescence materials which have been reported, you cansee that the phosphorescent devices of metal iridium (Ir) complexes have best efficiency,which the external quantum efficiency of the original red was18%, blue22%, green andeven efficiency up to27%. Although metal iridium (Ir) complexes’ luminescence efficiencyis best, but there were also some problems, such as phosphorescent devices haveself-quenching phenomenon and a long life in the luminescent phosphor saturation problemsat high current density, which leads directly to a decrease in the efficiency of the OLEDdevice. So my research group mainly study from the development of the phosphorescentdevices of the new metal iridium (Ir) complexes, simplify device structure, provideimproved quantum efficiency. In the aspect of improve the efficiency of the device andfilm-forming properties, on one hand we synthesize efficient metal iridium (Ir) complexesphosphorescent materials, on the other hand, the POSS structure is introduced, which the highefficient metal iridium (Ir) complexes phosphorescent materials is grafted onto the POSS withusing inorganic/organic hybrid technology. This is mainly embodied in the following threeaspects:(1) Because the POSS has octahedral structure, which is connected to the luminescentmaterial can reduce self-quenching phenomenon of the phosphorescent materials Under thehigh mass concentration.(2) The addition of POSS can improve the performance of thephosphorescent materials, such as high temperature resistance, oxidation resistance, Highpressure, fire and mechanical strength properties which is facility to preparation device usingapply spin coating technique.(3) At the molecular level of organic combination of inorganicmaterials while maintaining the original organic material of their respective nuclear energyperformance characteristics, but also has excellent properties of inorganic materials andorganic materials can not matchIn the second chapter, we improve the synthetic solution with adopting a pot reactionsynthesis idea,preparation of two kinds of efficient phosphor ligand2-benzothiazole-2- phenol (BTP) and3-(2-benzothiazole) coumarin (BTC). At the same time they are employedusing application of elemental analysis, infrared spectrum and1H NMR spectrum and ligandstructure was determined by X-ray diffraction. The experimental results show that thesolution and solid state, have a strong blue. In the third chapter, we prepared two kinds ofhigh efficiency metal complexes of Ir which its structure was investigated, and the structuresof the complexes were determined by X-ray single crystal diffraction. At the same time wealso studied optical properties of its, which this kind of complexes are issued a strong HuangLvguang in solution and the solid state, This is due to metal ion to ligand charge transferinduced. In the fourth, the high efficiency phosphorescent complexes of Ir are grafted toinorganic materials POSS nucleus, which are preparated efficient luminescence material. Itsstructure by elemental analysis, Fu Liye transform infrared spectroscopy,1H NMR,13C NMR,GPC characterization ware employed, we also through, UV visible spectrum, wide angle Xray diffraction study on its nature. The results show that they are high efficiency OLEDmaterials which is conformed to the original design concept.