A Stable and Efficient Host Material Having Tetraphenylsilane for Phosphorescent Organic Light Emitting Diodes

摘要

A host material containing tetraphenylsilane, 9-(4-triphenylsilanyl-(1, 1 '4,1 ")-terphenyl-4 "-yl)-9H-cabazole (TSTC), was synthesized for green phosphorescent organic emitting diodes. Ir(ppy)_3 based OLEDs using TSTC host and DTBT (2,4-diphenyl-6-(4 'yl)-1,3,5-triazine) hole blocking layer (HBL) showed the maximum external quantum efficiency of 19.8 % , the power efficiency of 59.4 Im and high operational stability with a half lifetime of 160,000 h at an initial luminance of 100 cd/m~2