Silicon-containing dendritic tris-cyclometalated Ir(III) complex and its electrophosphorescence in a polymer host

In this paper, we present the synthesis and characterization of a new highly phosphorescent cyclometalated Ir( III) complex with a silane-based dendritic substituent. The Ir( III) complex showed 74 +/- 3% of absolute phosphorescence quantum efficiency in the film state. In addition, efficient electrophosphorescence ( 32.8 cd A(-1)) employing an Ir( III) complex poly( N-vinylcarbazole) system device is observed. Study of a series of electroluminescent, spectroscopic, and electrochemical data of the Ir( III) complex and the reference Ir( ppy)(3) reveals superior performance of the new Ir( III) complex.