Organic electroluminescent element

摘要

Provided is an organic electroluminescent device (organic EL device) that is improved in luminous efficiency, sufficiently secures driving stability, and has a simple construction. The organic electroluminescent device includes an organic layer including a light-emitting layer between an anode and cathode laminated on a substrate, and at least one layer of the organic layer contains a carbazole compound represented by the following formula (1). It is advantageous to incorporate the carbazole compound as a host material into the light-emitting layer. In the formula (1), A represents a direct bond or an n-valent group, E represents oxygen or sulfur, and n represents an integer of 2 to 4.

主权项

1. An organic electroluminescent device, comprising:
a substrate; an anode; an organic layer; and a cathode, the anode, the organic layer, and the cathode being laminated on the substrate, wherein the organic layer comprises at least one layer selected from the group consisting of a light-emitting layer, a hole-transporting layer, an electron-transporting layer, and a hole-blocking layer, the at least one layer containing a carbazole compound represented by the general formula (1): where: A represents an n-valent aromatic hydrocarbon group having 6 to 18 carbon atoms, an n-valent aromatic heterocyclic group having 3 to 17 carbon atoms, or an n-valent group obtained by linking 2 to 4 aromatic rings each selected from an aromatic hydrocarbon ring having 6 to 18 carbon atoms and an aromatic heterocyclic ring having 3 to 17 carbon atoms, and the aromatic hydrocarbon group, the aromatic heterocyclic group, the aromatic hydrocarbon ring, and the aromatic heterocyclic ring may each have a substituent; R's represents hydrogen; E represents oxygen or sulfur; and n represents an integer of 2 to 4.