Abstract
A study was conducted to demonstrate a novel high-molecular-based iridium complex, bis[5-methyl-7-trifluoromethyl-5H-benzo(c)(1,5)naphthyridin-6-one] iridium(picolinate) (CF 3 BNO). It was demonstrated that the CF 3 BNO complex exhibited a short excited-state lifetime and a high quantum yield. The blue-green organic light-emitting diode (OLED) resulting from the complex showed a current efficiency of 89.1 cd A -1 through solution process, despite the CF 3 BNO having a comparatively high molecular weight. It was also observed that the quantum yield exhibited in CF 3 BNO was higher than those exhibited by BNO and Ir(ppy) 3 . Green OLED devices composed of BNO and Ir(ppy) 3 were fabricated through solution process to compare material characteristics. It was found that the CF 3 BNO-composing device via wet-process exhibited the highest current efficiency at all applied current densities, as compared with other wet-processed complexes.