Patent ID: 8803419

Claim:
An electronic device comprising: a display portion; a memory portion; an operation switch; and a main body which includes the display portion, the memory portion, and the operation switch, wherein the display portion comprises a light-emitting element comprising: a first electrode; a first layer over the first electrode; a light-emitting layer over the first layer; a second layer over the light-emitting layer, wherein the second layer comprises a first organic compound and a second organic compound; and a second electrode over the second layer, wherein the first layer comprises a third organic compound and a fourth organic compound, wherein the third organic compound has a hole transporting property, wherein the fourth organic compound has an electron transporting property, wherein a weight ratio of the first organic compound is higher than a weight ratio of the second organic compound, wherein the first organic compound has an electron transporting property, wherein the second organic compound has an electron trapping property, and wherein a lowest unoccupied molecular orbital level of the fourth organic compound is lower than a lowest unoccupied molecular orbital level of the third organic compound by 0.3 eV or more.