Light-emitting device and electronic apparatus including the same

A light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• m emitting units located between the first electrode and the second electrode;
• and
• m−1 charge generation units, each located between two neighboring emitting units among the m emitting units and including an n-type charge generation layer and a p-type charge generation layer,
• wherein:
• m is an integer of 2 or more;
• the m emitting units each comprises a hole transport region, an emission layer, and an electron transport region, which are sequentially arranged;
• at least one of the m emission layers comprises a first emission layer and a second emission layer that are in contact with each other;
• the first emission layer comprises a first host, a second host, and a first dopant;
• the second emission layer comprises a third host, a fourth host, and a second dopant;
• the first host and the second host form a first exciplex;
• the third host and the fourth host form a second exciplex;
• and
• the first dopant is a delayed fluorescence dopant, and the second dopant is a phosphorescent dopant, and
• wherein light emitted from each of the m emitting units has the same maximum emission wavelengths.

A light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• m emitting units located between the first electrode and the second electrode;
• and
• m−1 charge generation units, each located between two neighboring emitting units among the m emitting units and including an n-type charge generation layer and a p-type charge generation layer,
• wherein:
• m is an integer of 2 or more;
• the m emitting units each comprises a hole transport region, an emission layer, and an electron transport region, which are sequentially arranged;
• at least one of the m emission layers comprises a first emission layer and a second emission layer that are in contact with each other;
• the first emission layer comprises a first host, a second host, and a first dopant;
• the second emission layer comprises a third host, a fourth host, and a second dopant;
• the first host and the second host form a first exciplex;
• the third host and the fourth host form a second exciplex;
• and
• the first dopant is a delayed fluorescence dopant, and the second dopant is a phosphorescent dopant, and
• wherein:
• the light-emitting device comprises a first emitting unit, a second emitting unit adjacent to the first emitting unit, and a first charge generation unit between the first emitting unit and the second emitting unit;
• the first emitting unit is located between the first electrode and the first charge generation unit;
• the first emitting unit comprises the first emission layer and the second emission layer;
• and
• the second emitting unit comprises neither the first emission layer nor the second emission layer.