Light-emitting element, light-emitting device, and electronic device

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 second electrode;
• and
• a plurality of light-emitting units between the first electrode and the second electrode, wherein at least one of the plurality of light-emitting units comprises:
• a first layer;
• a second layer comprising a first organic compound and a second organic compound;
• and
• a light-emitting layer interposed between the first layer and 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 the first organic compound has an electron transporting property and the second organic compound has an electron trapping property,
• wherein the plurality of light-emitting units are stacked, and
• wherein a lowest unoccupied molecular orbital level of the second organic compound is lower than a lowest unoccupied molecular orbital level of the first organic compound by 0.3 eV or more.