Patent ID: 11963375
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. 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.