| abstract |
The invention provides a deep blue light thermally activated delayed fluorescence (Thermally Activated Delayed Fluorescence, TADF) material, the constituent compound molecules have an ultrafast reverse intersystem crossing rate, and when the material is doped as a host in an electroluminescent device In the light-emitting layer in the medium, the blue-light fluorescent and phosphorescent electroluminescent devices using it as the host material can achieve very high efficiency. |