| abstract |
The present invention relates to a class of novel main ligands, tetrakis (4-trifluoromethyl-3-pyridyl) phosphonimide or tetrakis (4-trifluoromethyl-3,5-pyrimidinyl) phosphonimide Amines are iridium complexes with auxiliary ligands, and the main ligands in this series of iridium complex molecules are 2,3-diphenylquinoxaline, 2,3-diphenylpyridine[2,3-b]pyrazine , 2,3-diphenylpyrazine[2,3-b]pyrazine, dibenzo[a,c]phenazine, dipyrido[3,2-a:2′,3′-c]phen Any of the oxazine 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. |