| abstract |
The invention relates to a novel iridium complex with a nitrogen heterocyclic ring as the main ligand and a dithioaromatic/aromatic heterocyclic phosphoric acid compound as an auxiliary ligand. The nitrogen heterocycle and phosphorus-sulfur group in the iridium complex molecule help to improve the electron mobility of the material and regulate the luminous color, thereby balancing the injection and transport of holes and electrons, broadening the recombination area of carriers, and improving device efficiency. , reducing efficiency roll-off. The iridium complex of the invention has the advantages of simple synthesis, stable chemical properties, easy sublimation and purification, and excellent device performance, which provides convenience for obtaining high-efficiency organic electroluminescent devices and their applications in the fields of lighting and display. |