Synthesis And Properties Of Novel Charge Thransport-Functional Copolymers Containing Iridium Complex

Along with the rapid development of OLED display technology,luminescent materials with high luminous efficiency,low power consumption and high color purity are highly interested.Cyclometalated iridium complex is applied extensively in OLED due to its relatively short phosphorescence lifetime,high quantum efficiency and adjustable luminous color,etc.In this thesis,three types of side-chain copolymers containing iridium complex have been designed and synthesized through radical polymerization.These copolymers can effectively avoid the concentration quenching phenomena.These phenomena are induced by ionic aggregation,phase separation and poor stability at a high current density of doped organic light-emitting device.The proportions of charge transport unit carbazole,1,3,4-oxadiazole and iridium complex were changed to realise energy transfer from the charge transport unit to iridium complex;The influence of introducing the electronic transmission unit 1,3,4-oxadiazole in the binary bipolymers on luminescent properties of polymers was studied;At the same time,the ligand of iridium complexes were changed to comparatively research the optical and electrical properties of different types of polymersThe structures of each monomer and polymer were characterized by elemental analysis,FT-IR,1HNMR,TG and so on.The photophysical properties,thermal stability and electrochemical properties of the synthesized polymers were also studied systematically.Optical performance results indicated that the polymers mainly reflected UV absorption of host materials and the photoluminescence properties of polymers were significantly improved compared with the small molecule iridium complexes.Consequently,side-chain copolymers with iridium complex having charge transport property be of crutial potential application value in the field of electroluminescence.