申请人:Kaminaga Kuniyuki
公开号:US10431749B2
公开(公告)日:2019-10-01
Disclosed is an organic electroluminescent element which is excellent with respect to luminous efficiency and driving voltage and rarely undergoes initial luminance drop. Specifically disclosed is an organic electroluminescent element which comprises, on a substrate, a pair of electrodes composed of an anode and a cathode and a light-emitting layer arranged between the electrodes, and additionally comprises at least one organic layer arranged between the light-emitting layer and the cathode, where in the light-emitting layer contains, for example, a compound (A-1), and the at least one layer arranged between the light-emitting layer and the cathode contains, for example, a compound (e-4).
本发明公开了一种有机电致发光元件,它在发光效率和驱动电压方面都非常出色,而且很少出现初始亮度下降的情况。具体地说,本发明公开了一种有机电致发光元件,它包括位于基板上的一对由阳极和阴极组成的电极以及位于电极之间的发光层,此外还包括位于发光层和阴极之间的至少一层有机层,其中发光层含有例如化合物(A-1),而位于发光层和阴极之间的至少一层含有例如化合物(e-4)。