Light-emitting device comprising first and second capping layers and electronic apparatus including the same

Patent metadata

Field	Value
Publication number	US-11950499-B2
Application number	US-202117240590-A
Country	US
Kind code	B2
Filing date	Apr 26, 2021
Priority date	Sep 8, 2020
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer disposed between the first electrode and the second electrode and including an emission layer, a first capping layer, and a second capping layer. A refractive index of the first capping layer is greater than a refractive index of the second capping layer, and the first capping layer and the second capping layer are each an organic layer. An electronic apparatus including the light-emitting device is also provided.

First claim

What is claimed is:

1. A light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an interlayer disposed between the first electrode and the second electrode, the interlayer including an emission layer;
a first capping layer; and
a second capping layer, wherein
a refractive index of the first capping layer is greater than a refractive index of the second capping layer,
the first capping layer and the second capping layer are each an organic layer, and
the first capping layer comprises a compound represented by Formula 1:

wherein in Formula 1,
R 1 to R 6 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 alkoxy group unsubstituted or substituted with at least one R 10a , a C 3 -C 60 carbocyclic group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heterocyclic group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 aryloxy group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 arylthio group unsubstituted or substituted with at least one R 10a , —B(Q 1 )(Q 2 ), —C(═O)(Q 1 ), —Si(Q 1 )(Q 2 )(Q 3 ), and —P(═O)(Q 1 )(Q 2 ),
Ar 1 and Ar 2 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or substituted with a t least one R 10a , a C 10 -C 60 alkoxy group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heterocyclic group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 aryloxy group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 arylthio group unsubstituted or substituted with at least one R 10a , —B(Q 1 )(Q 2 ), —C(═O)(Q 1 ), —Si(Q 1 )(Q 2 )(Q 3 ), and —P(═O)(Q 1 )(Q 2 ),
X is selected from a C 3 -C 60 carbocyclic group unsubstituted or substituted with at least one R 10a and a C 1 -C 60 heterocyclic group unsubstituted or substituted with at least one R 10a ,
m is an integer from 1 to 3,
a3 and a4 are each independently an integer from 1 to 3,
a5 and a6 are each independently an integer from 1 to 4,
when a3 is 2 or more, a plurality of R 3 (s) are identical to or different from each other,
when a4 is 2 or more, a plurality of R 4 (s) are identical to or different from each other,
when a5 is 2 or more, a plurality of R 5 (s) are identical to or different from each other,
when a6 is 2 or more, a plurality of R 6 (s) are identical to or different from each other, and
R 10a is:
deuterium (-D), —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;
a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, or a C 1 -C 60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, —Si(Q 11 )(Q 12 )(Q 13 ), —N(Q 11 )(Q 12 ), —B(Q 11 )(Q 12 ), —C(═O)(Q 11 ), —S(═O) 2 (Q 11 ), —P(═O)(Q 11 )(Q 12 ), or a combination thereof;
a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, or a C 6 -C 60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro 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 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, —Si(Q 21 )(Q 22 )(Q 23 ), —N(Q 21 )(Q 22 ), —B(Q 21 )(Q 22 ), —C(═O)(Q 21 ), —S(═O) 2 (Q 21 ), —P(═O)(Q 21 )(Q 22 ), or a combination thereof; or
—Si(Q 31 )(Q 32 )(Q 33 ), —N(Q 31 )(Q 32 ), —B(Q 31 )(Q 32 ), —C(═O)(Q 31 ), —S(═O) 2 (Q 31 ), or —P(═O)(Q 31 )(Q 32 ),
wherein Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 are each independently: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro 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; or a C 3 -C 60 carbocyclic group or a C 1 -C 60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C 1 -C 60 alkyl group, a C 1 -C 60 alkoxy group, a phenyl group, a biphenyl group, or a combination thereof.

2. The light-emitting device of claim 1 , wherein the first capping layer contacts the second capping layer.

3. The light-emitting device of claim 1 , wherein the first capping layer contacts the second electrode.

4. The light-emitting device of claim 1 , wherein the first capping layer is disposed outside the second electrode.

5. The light-emitting device of claim 1 , wherein
the first electrode is an anode,
the second electrode is a cathode,
the interlayer further comprises a hole transport region disposed between the first electrode and the emission layer, and
the hole transport region comprises a hole injection layer, a hole transport layer, an electron blocking layer, or a combination thereof.

6. The light-emitting device of claim 1 , wherein
the first electrode is an anode,
the second electrode is a cathode,
the interlayer further comprises an electron transport region disposed between the emission layer and the second electrode, and
the electron transport region comprises a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof.

7. The light-emitting device of claim 1 , wherein a refractive index of the first capping layer is in a range of about 1.7 to about 2.2, at a wavelength of about 550 nm.

8. The light-emitting device of claim 1 , wherein a refractive index of the second capping layer is in a range of about 1.2 to about 1.7, at a wavelength of about 550 nm.

9. The light-emitting device of claim 1 , wherein a thickness of the second capping layer is greater than a thickness of the first capping layer.

10. The light-emitting device of claim 1 , wherein a thickness of the first capping layer is in a range of about 60 nm to about 100 nm.

11. The light-emitting device of claim 1 , wherein a thickness of the second capping layer is in a range of about 40 nm to about 120 nm.

12. The light-emitting device of claim 1 , wherein R 3 to R 6 are each independently hydrogen or deuterium.

13. The light-emitting device of claim 1 , wherein the second capping layer comprises a compound represented by Formula 2:

wherein in Formula 2,
R 11 to R 25 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or s

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Bora
• Ko Hyomin
• Oh Ilsoo

Classifications

• H10W74/137

  the encapsulations being directly on the semiconductor body (H10W74/134 takes precedence) · CPC title

• H10W90/00 Primary

  Package configurations · CPC title

• H10K59/879

  comprising refractive means, e.g. lenses · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/872

  Containers · CPC title