Light-emitting device and electronic apparatus including same

A light-emitting device comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an interlayer between the first electrode and the second electrode and comprising an emission layer, wherein
• the emission layer comprises:
• a hole transporting host;
• an electron transporting host;
• a sensitizer;
• and
• a delayed fluorescence dopant,
• the hole transporting host and the electron transporting host form an exciplex,
• the sensitizer comprises an organometallic compound,
• the delayed fluorescence dopant does not comprise a metal atom, and
• the exciplex satisfies Equations 1 and 2:
• ΔE1CT-3LE=|E(1CT)−E(3LE)|≥0.06eV [Equation 1]
• E(3LE)≥E(3CT) [Equation 2]
• wherein in Equations 1 and 2,
• E(1CT) represents an energy level (eV) of a singlet charge-transfer state (1CT) of the exciplex,
• E(3CT) represents an energy level (eV) of a triplet charge-transfer state (3CT) of the exciplex, and
• E(3LE) represents an energy level (eV) of a triplet localized excited state (3LE) of the exciplex.