公开(公告)号：EP4152910A1

公开(公告)日：2023-03-22

申请号：EP22204502.3

申请日：2014-08-13

申请人： Kyulux, Inc.

发明人： Nakanotani, Hajime ,  Adachi, Chihaya ,  Higuchi, Takahiro ,  Furukawa, Taro

IPC分类号： H10K50/11 ,  H10K101/20

摘要： An organic electroluminescent device having an anode (2), a cathode (7), and a light emitting layer (5) between the anode (2) and the cathode (7), in which the light emitting layer (5) contains a first organic compound, a second organic compound, and a third organic compound that satisfy the following expression (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light emitting material, is capable of enhancing the light emission efficiency. E S1 (A), E S1 (B) and E S1 (C) represent a lowest singlet excitation energy level of the first, second and third organic compound, respectively. E S 1 A > E S 1 B > E S 1 C