| 摘要 |
Provided is an organic electroluminescent device (organic EL device) which has improved luminous efficiency and a simple configuration, while ensuring sufficient driving stability. This organic electroluminescent device includes a light-emitting layer between an anode and a cathode that are laminated on a substrate. The light-emitting layer contains a phosphorescent light-emitting dopant, and a carbazole compound represented by the following formula (1) as a host material. In the formula (1), E represents oxygen or sulfur, and R1 to R6 each represent hydrogen, an alkyl group, a cycloalkyl group, or an aromatic group represented by the formula (2). In the formula (2), X represents CR9 or nitrogen.; |
| 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, a hole-blocking layer, and an electron-blocking layer, the at least one layer containing a carbazole compound represented by the general formula (1): in the general formula (1), R1 to R6 each independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, or an aromatic group represented by the general formula (2), and at least one of R1 to R6 represents an aromatic group represented by the general formula (2), X's each independently represent CR9 or nitrogen, R7 to R9 each independently represent hydrogen, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 11 carbon atoms, an aromatic hydrocarbon group having 6 to 18 carbon atoms, or an aromatic heterocyclic group having 3 to 17 carbon atoms, and the aromatic hydrocarbon group and the aromatic heterocyclic group may each have a substituent, and E represents oxygen or sulfur. |
