Dendritic organic metal composition and electroluminescent device using same

Abstract

The invention provides a dendritic organic metal composition and an electroluminescent device using same .The dendrite of the dendritic organic metal composition is made from organic radicals with the function of host materials. A central nucleus is a transition metal composition unit with the property of phosphorescent light emission. The formula of the dendritic organic metal composition is (1)or (2). The dendritic organic metal composition can be processed in solution, easy to synthesize, high in stability, good in film forming and fine in current carrier transmission ability, and can be used for preparing efficient doped and non-doped organic electroluminescent light-emitting diode (LED) with the luminous layer and an organic electroluminescent device. The max brightness of the prepared multilayer electroluminescent device is 13608cd / m<2>, the max luminous efficiency thereof is 17.55cd / A, and the max power efficiency thereof is 8.41m / W.

Description

Technical field [0001] The invention relates to a dendritic organometallic complex and an electroluminescent device using the complex. technical background [0002] Organic electroluminescence (Electroluminescence EL) materials is a rapidly advancing scientific research field. Since Deng Qingyun and others of Kodak Company of the United States used 8-hydroxyquinoline aluminum as a luminescent material in 1987 to obtain high-brightness light-emitting diodes at lower voltages, we have clearly seen this in only 20 years. The broad prospects of similar materials in the development of new flat panel display devices have become the object of competition for development by more and more research institutions and companies. [0003] Generally speaking, organic light-emitting materials are organic compounds or metal complexes containing conjugated structures. There are two different types of light-emitting layers used in organic electroluminescent devices. One is called the host light-em...

AI Technical Summary

Problems solved by technology

[0008] However, such materials have been poorly studied, and the few materials that do exist do not take full advantage of the supposed advantages of dendritic organometallic complexes.

The research team led by P.L.Burn reported the red light iridium complex with benzene ring as the branch (Anthopoulos, T.D., Burn, P.L.etal, Adv.Mater 16, 557 (2004)), because the branch of the benzene ring cannot transport well Carriers, the efficiency of the electroluminescent device prepared by it is low; the P.L.Burn research group used diphenylene as a branch to synthesize a luminescent material with porphyrin platinum as the core (John, M.L., Burn, P.L.et al, Adv.Func .Mater 11, 287(2001)), but the device efficiency is not very effective due to the phosphorescent quenching effect of distyryne dendrons

Images