| 초록 |
Phosphorescent cationic iridium complexes, [Ir(ppz)2(dmphen)]PF6 (1) and [Ir(dfppy)2(mphen)]PF6 (2) with 1-phenylpyrazole (ppz), 2-(2,4-difluorophenyl)pyridine (dfppy) as cyclometalated ligands and 5-methyl-1,10-phenanthroline (mphen) as ancillary ligand, were synthesized and characterized for their potential applications in display and lighting devices. Light-emitting electrochemical cells (LECs) based on these complexes were fabricated and resulted in yellow and green electroluminescence with CIE coordinates of (0.42, 0.55) and (0.26, 0.58) for complex 1 and 2 respectively. Furthermore, imidazolium based ionic liquid (IL), BMIMPF6 was incorporated into the active layer and their electroluminescent properties were studied and compared with pristine device without IL. |
