Light emitting element and electronic device including the same

A light emitting element comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• at least one light emitting structure disposed between the first electrode and the second electrode, wherein
• the at least one light emitting structure includes:
• a hole transport region;
• a first buffer layer disposed on the hole transport region;
• an emission layer disposed on the first buffer layer;
• a second buffer layer disposed on the emission layer;
• and
• an electron transport region disposed on the second buffer layer,
• the emission layer includes:
• a hole transporting host;
• an electron transporting host;
• a phosphorescent sensitizer;
• and
• a light emitting dopant,
• the first buffer layer includes:
• the hole transporting host;
• the phosphorescent sensitizer;
• and
• the light emitting dopant,
• the second buffer layer includes:
• the electron transporting host;
• the phosphorescent sensitizer;
• and
• the light emitting dopant, and
• the first buffer layer and the second buffer layer each independently have a thickness in a range of about 20 Å to about 50 Å.

An electronic device including a display device that provides images, the display device comprising:

• a circuit layer disposed on a base layer;
• and
• a light emitting element disposed on the circuit layer, wherein
• the light emitting element includes:
• a first electrode;
• a second electrode facing the first electrode;
• and
• at least one light emitting structure disposed between the first electrode and the second electrode,
• the at least one light emitting structure includes:
• a hole transport region;
• a first buffer layer disposed on the hole transport region;
• an emission layer disposed on the first buffer layer;
• a second buffer layer disposed on the emission layer;
• and
• an electron transport region disposed on the second buffer layer,
• the emission layer includes:
• a hole transporting host;
• an electron transporting host;
• a phosphorescent sensitizer;
• and
• a light emitting dopant,
• the first buffer layer includes:
• the hole transporting host;
• the phosphorescent sensitizer;
• and
• the light emitting dopant,
• the second buffer layer includes:
• the electron transporting host;
• the phosphorescent sensitizer;
• and
• the light emitting dopant, and
• the first buffer layer and the second buffer layer each independently have a thickness in a range of about 20 Å to about 50 Å.