Synthesis and Properties of 3,8-Bis[4-(9H-carbazol-9-yl)phenyl]-1,10-phenanthroline for Phosphorescent OLEDs

A novel bipolar molecule, 3,8-bis[4-(9H-carbazol-9-yl)-phenyl]-1,10-phenanthroline (CZPT) was synthesized and employed as the host in phosphorescent organic light-emitting devices (OLEDs). A maximum luminance of 7000 cd/m 2 was achieved using fac-tris(2-phenylpyridine)iridium (Ir(ppy) 3 ) as the emitting material.