| 초록 |
We have been synthesized the various colors of phosphorescent Ir(III) complexes for phosphorescent organic light-emitting diodes (PhOLEDs) applications. We reported a highly efficient and soluble red-emitting tris(4-phenyl-2-(thiophen-2-yl)quinoline)iridium(III) complex, (Th-PQ)3Ir, that was designed and successfully synthesized for use in solution-processed PhOLED. Using this simple structure, we achieved a PhOLED with very high luminous current efficiency of ~ 26 cd/A and EQE of ~ 21% with good CIE coordinates (0.64, 0.34). And also, two heteroleptic Ir(III) complexes, TPQIr-ET and TPQIr were designed, synthesized, and applied as a dopant for solution-processed deep-red PhOLEDs. We introduced the electron transport (ET) group to the ancillary ligand of dopant materials to improve the balanced charge carrier injection in the devices. As a result, TPQIr-ET shows the EQE of 20.59%, which is 25% higher than that of the TPQIr. |
