Organometallic compound, organic light-emitting device including the organometallic compound, and organic light-emitting apparatus including the organic light-emitting device
Provided are an organometallic compound, an organic light-emitting device including the organometallic compound, and an organic light-emitting apparatus including the organic light-emitting device. Organic light-emitting devices including the organometallic compound may have a low driving voltage, high efficiency, and high luminance, thereby implementing high-quality organic light-emitting devices and organic light-emitting apparatuses.
1. An organometallic compound selected from Compounds 3-5, 8-10, 13-15, 18-20, 23-25, 28-30, 33-35, 38-40, 43-45, 48-50, 53-55, 58-60, 63-65, 68-70, 73-75, 78-80, 83-85, 88, 89, 93-95, 98-100, 103-105, 108-110, 113-115, 118-120, 123-125, 128-130, 133-135, 138-140, 143-145, 148-150, 153-155, 158-160, 163-165, 168-170, 173-175, and 178-180:
2. The organometallic compound of claim 1 , wherein:
the organometallic compound emits blue light having a maximum emission wavelength of about 440 nm to about 495 nm, and
a difference between a singlet (S 1 ) energy level and a triplet (T 1 ) energy level of the organometallic compound is about 0.5 eV or less.
3. An organic light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode; and
an organic layer disposed between the first electrode and the second electrode,
wherein the organic layer comprises an emission layer and at least one of the organometallic compound of claim 1 .
4. The organic light-emitting device of claim 3 , wherein:
the first electrode is an anode,
the second electrode is a cathode,
the organic layer further comprises a hole transport region between the first electrode and the emission layer and an electron transport region between the emission layer and the second electrode,
the hole transport region comprises a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or any combination thereof, and
the electron transport region comprises a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.
5. The organic light-emitting device of claim 3 , wherein:
the emission layer comprises the at least one organometallic compound.
6. The organic light-emitting device of claim 3 , wherein:
the at least one organometallic compound of the emission layer acts as a phosphorescent dopant, such that phosphorescence is emitted from the emission layer; or
the at least one organometallic compound of the emission layer acts as a delayed fluorescent dopant, such that delayed fluorescence is emitted from the emission layer.
7. The organic light-emitting device of claim 3 , wherein:
the emission layer comprises a dopant that is different from the at least one organometallic compound, and
the at least one of the organometallic compound acts as a metal-assisted delayed fluorescent dopant.
8. The organic light-emitting device of claim 4 , wherein:
the hole transport region comprises the electron blocking layer, and the electron blocking layer comprises the at least one organometallic compound; or
the electron transport region comprises the hole blocking layer, and the hole blocking layer comprises the at least one organometallic compound.
9. The organic light-emitting device of claim 4 , wherein:
at least one selected from the hole transport region and the emission layer comprises at least one selected from an arylamine-containing compound, an acridine-containing compound, and a carbazole-containing compound; or
at least one selected from the emission layer and the electron transport region comprises at least one selected from a silicon-containing compound, a phosphine oxide-containing compound, a sulfur oxide-containing compound, a phosphorus oxide-containing compound, a triazine-containing compound, a pyrimidine-containing compound, a pyridine-containing compound, a dibenzofuran-containing compound, and a dibenzothiophene-containing compound.
10. An organic light-emitting apparatus comprising:
the organic light-emitting device of claim 3 ; and
a thin film transistor,
wherein the thin film transistor comprises a source electrode and a drain electrode, and
the first electrode of the organic light-emitting device is electrically coupled to at least one selected from the source electrode and the drain electrode of the thin film transistor.