Study of the characteristics of phosphorescent red organic light emitting diode using new iridium(III) complex with thiophene as dopant material

초록

New red phosphorescent iridium(III) complex, (TP-MQ)(2)Ir(tmd) was synthesized for red emitter of the phosphorescent organic light-emitting diodes (phOLEDs). The ligands have sites of both the electron donor and acceptor in a molecule. The main ligands consisted of electron-donors Thiophene and electron-acceptor 4-methylquinoline were synthesized by Suzuki coupling reaction. The iridium(III) complexes based on main ligands and 2,2,6,6-tetramethyl-3,5-heptanedione(tmd) ancillary ligand were synthesized by Nonoyama reaction. Their luminescence property was investigated by UV-visible spectroscopy and photoluminescence (PL) spectroscopy. The manufactured OLED were characterized by investigation of electroluminescence spectrum, current density-voltage-luminance, power efficiency, external quantum efficiency and life time.

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