Light-emitting device and electronic apparatus comprising same
A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer disposed between the first electrode and the second electrode and including an emission layer patterned into a red emission layer and a green emission layer for a corresponding sub-pixel, wherein the red emission layer includes a red dopant having a horizontal dipole moment, and the green emission layer comprises a green dopant having a horizontal dipole moment, and the horizontal dipole moment of the green dopant is greater than the horizontal dipole moment of the red dopant.
1. A light-emitting device comprising:
a first electrode;
an interlayer on the first electrode and comprising an emission layer patterned into a red emission layer, a green emission layer, and a blue emission layer for a corresponding sub-pixel;
a second electrode on the interlayer; and
an encapsulation layer on the second electrode;
wherein the red emission layer comprises a red light-emitting material having a horizontal dipole moment, the green emission layer comprises a green light-emitting material having a horizontal dipole moment, and the blue emission layer comprises a blue light-emitting material, and
the horizontal dipole moment of the green light-emitting material is greater than the horizontal dipole moment of the red light-emitting material.
2. The light-emitting device of claim 1 , wherein the horizontal dipole moment of the green light-emitting material is in a range of about 60% to about 95% of a total dipole moment of the green light-emitting material.
3. The light-emitting device of claim 1 , wherein the horizontal dipole moment of the red light-emitting material is about 80% or lower of a total dipole moment of the red light-emitting material.
4. The light-emitting device of claim 1 , wherein the horizontal dipole moment of the red light-emitting material is in a range of about 60% to about 80% of a total dipole moment of the red light-emitting material.
5. The light-emitting device of claim 4 , wherein the horizontal dipole moment of the red light-emitting material is in a range of about 65% to about 75% of a total dipole moment of the red light-emitting material.
6. The light-emitting device of claim 1 , further comprising a capping layer with a refractive index of about 1.6 or higher disposed on the second electrode.
7. The light-emitting device of claim 6 , wherein the capping layer is in contact with the second electrode.
8. The light-emitting device of claim 1 , wherein the encapsulation layer comprises at least one organic layer and at least one inorganic layer.
9. The light-emitting device of claim 1 , wherein the blue light-emitting material is a metal complex including a ligand and a metal.
10. The light-emitting device of claim 1 , wherein a direction of a color-coordinate change movement according to a viewing angle is a minimum perceptible color difference line direction.
11. The light-emitting device of claim 10 , wherein the color-coordinate change movement is a movement at a viewing angle of greater than about 0 degrees to about 60 degrees.
12. The light-emitting device of claim 1 , wherein the green light-emitting material and the red light-emitting material are each represented by Formula 401:
wherein, in Formulae 401 and 402,
M is iridium, platinum, palladium, osmium, titanium, gold, hafnium, europium, terbium, rhodium, rhenium, or thulium;
L 401 is a ligand represented by Formula 402, and xc1 is 1, 2, or 3, and when xc1 is an integer of 2 or greater, at least two L 401 (s) are identical to or different from each other;
L 402 is an organic ligand, and xc2 is an integer from 0 to 4, and when xc2 is an integer of 2 or greater, at least two L 402 (s) are identical to or different from each other;
X 401 and X 402 are each, independently from one another, nitrogen or carbon;
ring A 401 and ring A 402 are each, independently from one another, a C 5 -C 60 carbocyclic group or a C 1 -C 60 heterocyclic group;
T 401 is a single bond, —O—, —S—, —C(═O)—, —N(Q 411 )—, —N═, —C(Q 411 )(Q 412 )—, —C(Q 411 )═C(Q 412 )—, —C(Q 411 )═, or ═C═;
X 403 and X 404 are each, independently from one another, a chemical bond, O, S, N(Q 413 ), B(Q 413 ), P(Q 413 ), C(Q 413 )(Q 414 ), or Si(Q 413 )(Q 414 );
R 401 and R 402 are each, independently from one another, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, —Si(Q 401 )(Q 402 )(Q 403 ), —N(Q 401 )(Q 402 ), —B(Q 401 )(Q 402 ), —C(═O)(Q 401 ), —S(═O) 2 (Q 401 ), or —P(═O)(Q 401 )(Q 402 ),
wherein Q 401 to Q 403 and Q 411 to Q 414 are each, independently from one another, hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 1 -C 60 heteroaryl group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a biphenyl group, or a terphenyl group;
xc11 and xc12 are each, independently from one another, an integer from 0 to 10; and
* and *′ in Formula 402 each indicate a binding site to M in Formula 401.
13. The light-emitting device of claim 12 , wherein L 402 is an organic ligand comprising a halogen group, a diketone group, a carboxylic acid group, —C(═O), an isonitrile group, a —CN group, a phosphorus group, or any combination thereof.