| abstract |
A novel polycyclic aromatic compound and an organic electroluminescent device using the same. By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are connected by a boron atom and an oxygen atom or the like, it is possible to increase the choice of materials for the organic EL device and to use a novel polycyclic aromatic compound as a material for an organic electroluminescence device And provides an excellent organic EL device, thereby solving the above problems. |