| abstract |
The present invention relates to a class of novel main ligands with 2-(5-phenyl-1,3,4-oxadiazole-2-) phenol or 2-(5-(3-pyridine) base-1,3 , 4-oxadiazole-2-)phenol is the iridium complex of the auxiliary ligand, and the main ligand in the series of iridium complex molecules is 2,3-diphenylquinoxaline, 2,3-diphenyl Pyridin[2,3‑b]pyrazine, 2,3‑diphenylpyrazine[2,3‑b]pyrazine, dibenzo[a,c]phenazine, dipyrido[3,2‑a : any one of 2′, 3′‑c] phenazine derivatives. The novel iridium complex covered by the invention not only has the advantages of high luminous efficiency, stable chemical properties, easy sublimation and purification, but also has excellent device performance. By modifying the molecular structure of the ligand, the luminous intensity and efficiency of the complex can be adjusted in the red wavelength range, which facilitates the design and production of organic electroluminescent displays and lighting sources. |