| abstract |
An organic electroluminescent device comprises a pair of electrodes and anlayer structure provided between the paired electrodes and including, at least,nan emission layer comprising a specific type of oligomer The layer structurenmay further comprise an electron injection layer and an electron transport layer,none of which comprises a specific type of oligomer. Alternatively, the layernstructure may be of the type which comprises an organic layer having a chargentransport interference layer in the inside thereof along with an emission layer. |