摘要:
The invention provides a polycyclic aromatic compound or a salt thereof having a partial structure represented by the following general formula (I): wherein X, ring A, ring B, ring C, and ring D are as defined in the specification.
摘要:
Provided is an organic electroluminescent element which has improved driving voltage and improved current efficiency. An organic electroluminescent element having the above-mentioned improved characteristics is provided by using, as a material for organic electroluminescent elements, a polycyclic aromatic compound in which a nitrogen atom and another heteroatom or a metal atom (X) are adjacent to each other in a non-aromatic ring.