| 초록 |
Though the degradation mechanisms in the organic light-emitting device (OLED) are not yet fully understood, several studies indicate that one cause of the degradation is the morphological changes of amorphous organic layers caused by Joule heating during device operation, especially the hole-transporting layer (HTL). This regard brought hole transporting polyimides to limelight. In the present work, a new carbazole-containing aromatic diamine, 4"-Carbazol-9-yl-[1, 1', 2', 1"] terphenyl-4, 4'-diamine (CTPDA) was synthesized as the monomer for the preparation of novel hole injecting and transporting polyimides. The materials were characterized using 1H NMR, 13C NMR, FT-IR and EA. The polyimides, prepared by two-step polycondensation reaction of 4,4′- (hexafluoro isopropylidene) diphathalic anhydride (6FDA) or pyromellitic dianhydride (PMDA) and the synthesized diamine, was characterized using TGA, DSC, WAXRD, UV-Visible and PL spectroscopy. |
