Patent ID: 7947992

Claim:
A light-emitting element comprising: a cathode; an anode; a first light-emitting layer that is disposed between the cathode and the anode and that emits light of a first color; a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and that emits light of a second color different from the first color; a third light-emitting layer that is disposed between the second light-emitting layer and the cathode and that emits light of a third color different from the first color and the second color; a first interlayer that is disposed between the first light-emitting layer and the second light-emitting layer so as to be in contact with the first and second light-emitting layers and that has a function of preventing energy transfer of an exciton between the first light-emitting layer and the second light-emitting layer; and a second interlayer that is disposed between the second light-emitting layer and the third light-emitting layer so as to be in contact with the second and third light-emitting layers and that has a function of preventing energy transfer of an exciton between the second light-emitting layer and the third light-emitting layer, wherein the first interlayer has a hole-transporting property higher than that of the second interlayer, the second interlayer has an electron-transporting property higher than that of the first interlayer, and an energy level of a lowest unoccupied molecular orbital of a material constituting the first interlayer is lower than an energy level of a lowest unoccupied molecular orbital of a material constituting the second light-emitting layer.