| abstract |
The invention discloses a deep blue light molecule based on a thermally activated delayed fluorescence mechanism, a preparation method and an application thereof. The molecule has a structure represented by formula (1). The dark blue light molecule uses a σ bond to combine the benzo-fused ring and the dihydroacridine, which can further regulate the molecular S1, T1, hole and electron mobility and stability, so that the deep blue light molecule can finally achieve high-efficiency TADF glow. In addition, acridine is modified by introducing a specific fragment through a σ bond, which can enable the dark blue molecule to emit light in the blue and dark blue light regions, and at the same time allow the dark blue molecule to have good thermal stability and balanced electron/hole mobility. . The invention also discloses an organic electroluminescent device containing deep blue light molecules, and the deep blue light molecules are used as light-emitting materials in organic electroluminescent (OLED) devices. |