| abstract |
The present invention discloses a delayed fluorescent compound and an organic electroluminescent device using the delayed fluorescent compound as a delayed fluorescent dopant material, a delayed fluorescent host material, or a phosphorescent host material in a light-emitting layer, and/or the delay The fluorescent compound is used for a hole blocking layer and/or an electron transporting layer of an organic electroluminescent element, which thus exhibits good performance. |