| abstract |
The invention discloses pyrazolo[3,4-b]pyridine derivatives, and a preparation method and application thereof. The compounds have the structural general formula shown as a formula I. The compounds have higher triple state energy level (higher than 2.4eV), and can simultaneously sensitize green and red phosphorescent-doped materials. When the compounds are applied to devices, the materials emits single state blue fluorescence, and transmits triple state energy to the green and red phosphorescent-doped materials, and high-efficiency white devices are obtained by combining three primary color luminescence. A process for manufacturing devices is simpler, the cost is reduced, and the device efficiency is greatly improved. |