申请人:Kyushu University, National University Corporation
公开号:EP3843167A1
公开(公告)日:2021-06-30
An organic electroluminescent device having an anode, a cathode, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains at least a first organic compound, a second organic compound and a third organic compound satisfying the following formula (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light-emitting material, has a high light emission efficiency. Formula (A): ES1(A) > ES1(B) > ES1(C) wherein ES1(A), ES1(B) and ES1(C) each represent a lowest excited singlet energy level of the first organic compound, the second organic compound and the third organic compound, respectively.
一种有机电致发光器件,具有阳极、阴极和位于阳极与阴极之间的发光层,其中发光层至少含有满足下式(A)的第一有机化合物、第二有机化合物和第三有机化合物,第二有机化合物是一种延迟荧光材料,第三有机化合物是一种发光材料,具有较高的发光效率。式(A):ES1(A)>ES1(B)>ES1(C) 其中 ES1(A)、ES1(B) 和 ES1(C) 分别代表第一种有机化合物、第二种有机化合物和第三种有机化合物的最低激发单线能级。