| 摘要 |
To provide a long lifetime light-emitting element, in particular, to provide a long lifetime white light-emitting element, and to provide a light-emitting element having high luminous efficiency, in particular, to provide a white light-emitting element having high luminous efficiency. In a light-emitting element having, between an anode (101) and a cathode (102), a first light-emitting layer (111) containing a first light-emitting substance and a second light-emitting layer (112) containing a second light-emitting substance which is provided to be in contact with the first light-emitting layer, the first light-emitting layer (111) is divided into a layer (121) provided on the anode side and a layer (122) provided on the cathode side. At this time, a host material having a hole-transporting property is used for the layer provided on the anode side, and a host material having an electron-transporting property is used for the layer provided on the cathode side. |
