| abstract |
The invention discloses a compound with ketone as the core and its preparation method and application. The compound has a small â–³Est, which is beneficial to the backlash jump of energy, has a high triplet energy level (T1), and has a suitable HOMO and LUMO energy levels are suitable for application as the main material of the light-emitting layer of organic electroluminescent devices; in addition, the compound group of the present invention is relatively rigid, and has the characteristics of difficult crystallization and aggregation between molecules, and good film-forming properties. After being used as an organic electroluminescent functional layer material in an OLED device, the current efficiency, power efficiency and external quantum efficiency of the device are greatly improved; at the same time, the device life is significantly improved. |