KR-102962704-B1 - LIGHT EMITTING DEVICE AND ELECTRONIC APPARATUS COMPRISING THE SAME

Abstract

A light-emitting element and an electronic device including the same are provided, comprising: a first electrode; a second electrode facing the first electrode; and an intermediate layer disposed between the first electrode and the second electrode; wherein the intermediate layer comprises a light-emitting layer and an electron transport region, wherein the electron transport region is disposed between the light-emitting layer and the second electrode, and wherein the electron transport region comprises a first compound represented by a predetermined chemical formula, an alkali metal halide, and a lanthanide metal, and wherein the first compound comprises one or more C8 - C60 carbocyclic groups or C8 - C60 heterocyclic groups.

Inventors

• 김슬옹
• 고삼일
• 김형근
• 김동환
• 정혜인

Assignees

• 삼성디스플레이 주식회사

Dates

Publication Date

20260508

Application Date

20210317

Claims (20)

1. First electrode; A second electrode facing the first electrode; and Includes an intermediate layer disposed between the first electrode and the second electrode; The above intermediate layer includes a light-emitting layer and an electron transport region, and The above electron transport region is disposed between the light-emitting layer and the second electrode, and The above electron transport region comprises a first compound represented by the following chemical formula 1, an alkali metal halide, and a lanthanide metal, and A light-emitting device comprising one or more C8 - C60 carbocyclic groups or C8 - C60 heterocyclic groups, wherein the first compound comprises: <Chemical Formula 1> Among the above chemical formula 1, X1 is N, X2 is N, X3 is N, and L1 to L3 are independently a C3 - C60 carbocyclic group substituted or unsubstituted with at least one R10a , or a C1 - C60 heterocyclic group substituted or unsubstituted with at least one R10a , and a1 to a3 are independently one of integers 0 to 5, and Ar 1 to Ar 3 and R 1 to R 3 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, a C 1 -C 60 alkyl group substituted or unsubstituted with at least one R 10a , a C 2 -C 60 alkenyl group substituted or unsubstituted with at least one R 10a , a C 2 -C 60 alkynyl group substituted or unsubstituted with at least one R 10a , a C 1 - C 60 alkoxy group substituted or unsubstituted with at least one R 10a , a C 3 -C 60 carbocyclic group substituted or unsubstituted with at least one R 10a , a C 1 -C 60 heterocyclic group substituted or unsubstituted with at least one R 10a , a C 6 -C 60 aryloxy group substituted or unsubstituted with at least one R 10a, and at least one R A C 6 - C 60 arylthio group substituted or unsubstituted with 10a , -Si(Q 1 )(Q 2 )(Q 3 ), -N(Q 1 )(Q 2 ), -B(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O) 2 (Q 1 ) or -P(=O)(Q 1 )(Q 2 ), and At least one of the above Ar 1 to Ar 3 comprises an electron transport group, and The above R 10a is, Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group; Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3 - C60 carbocyclic group, C1 - C60 heterocyclic group, C6 - C60 aryloxy group, C6 - C60 arylthio group, -Si( Q11 )( Q12 )( Q13 ), -B( Q11 )(Q12), -C(=O)( Q11 ), -S(=O) 2 ( Q11 ), -P(=O)( Q11 )( Q12 ), or any combination thereof, C1 - C60 alkyl group, C2 - C60 alkenyl group, C2 - C60 alkynyl group, or C1 - C60 alkoxy group, substituted or unsubstituted by any combination thereof; Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1 - C60 alkyl group, C2 - C60 alkenyl group, C2 - C60 alkynyl group, C1 - C60 alkoxy group, C3 - C60 carbocyclic group, C1 - C60 heterocyclic group, C6 - C60 aryloxy group, C6 - C60 arylthio group, -Si( Q21 )( Q22 )( Q23 ), -B( Q21 )( Q22 ), -C(=O)( Q21 ), -S(=O) 2 ( Q21 ), -P(=O)( Q21 )( Q22 ), or any combination thereof, C3 - C60 Carbocyclic group, C1 - C60 heterocyclic group, C6 - C60 aryloxy group, or C6 - C60 aryltio group; or -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O) 2 (Q 31 ), or -P(=O)(Q 31 )(Q 32 ); The above Q1 to Q3 , Q11 to Q13, Q21 to Q23 and Q31 to Q33 are independently hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl group; cyano group; nitro group; C1 - C60 alkyl group; C2 - C60 alkenyl group; C2 - C60 alkynyl group; C1 - C60 alkoxy group; or a C3- C60 carbocyclic group or C1 - C60 heterocyclic group substituted or unsubstituted with deuterium, -F, cyano group, C1 - C60 alkyl group, C1 - C60 alkoxy group, phenyl group, biphenyl group, or any combination thereof; and The content of the alkali metal halide in the electron transport region is greater than the content of the lanthanide metal, and The above electron transport group may be selected from the following chemical formulas 6-1 to 6-8 and 6-23 to 6-55, and Among the above chemical formulas 6-1 to 6-8 and 6-23 to 6-55, Z 31 is selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazino group, hydrazono group, C1 - C20 alkyl group, C1 - C20 alkenyl group, C1 - C20 alkynyl group, C1 - C20 alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, phenanthrenyl group, anthracenyl group, triperylenyl group, pyridinyl group, pyrimidinyl group, carbazole group, and triazinyl group, and e2 is 1 or 2, and e3 is selected from integers 1 to 3, and e4 is selected from integers 1 to 4, and e5 is selected from integers 1 to 5, and * is a bonding site with a neighboring atom.
2. In paragraph 1, The above electron transport region includes a first layer and a second layer that are different from each other, and The first layer above comprises the first compound, and The light-emitting element, wherein the second layer comprises the alkali metal halide and lanthanide metal.
3. In paragraph 2, The light-emitting element, wherein the first layer further comprises a Li complex.
4. In paragraph 1, The above electron transport region is a light-emitting device including an electron transport layer and an electron injection layer.
5. In paragraph 4, A light-emitting element in which the electron transport layer is in direct contact with the light-emitting layer.
6. In paragraph 4, A light-emitting device in which the electron injection layer is in direct contact with the second electrode.
7. In paragraph 4, The above electron transport layer and the light-emitting element in direct contact with the electron transport layer.
8. In paragraph 1, The first compound is a cyclooctane group, adamantane group, norvonanan group, norbornene group, pentarene group, indene group, naphthalene group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, triphenylene group, pyrene group, chrysene group, isoindole group, indole group, quinoline group, isoquinoline group, benzoquinoline group, phthalazine group, naphthiridine group, quinoxaline group, quinazolin group, sinoline group, carbazole group, phenanthridine group, acridine group, phenanthroline group, benzofuran group, benzothiophene group, dibenzofuran group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, or any of these. A light-emitting element including a combination.
9. delete
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11. In paragraph 1, A light-emitting device comprising at least one of the following compounds ET1, ET5, ET6, ET11 to ET14, ET18, ET19, ET24 to ET26, and ET31, wherein the first compound comprises: .
12. In paragraph 1, A light-emitting device in which the alkali metal halide is LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, or any combination thereof.
13. In paragraph 1, A light-emitting device wherein the above-mentioned lanthanide metal is lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), or any combination thereof.
14. delete
15. In paragraph 1, The second electrode further comprises magnesium (Mg), and A light-emitting element having a magnesium content of 10 weight% or less.
16. In paragraph 1, The first electrode of the above-mentioned light-emitting element is an anode, and The second electrode of the above-mentioned light-emitting element is a cathode, and The above intermediate layer further includes a hole transport region disposed between the first electrode and the light-emitting layer, and The above hole transport region is a light-emitting device comprising a hole injection layer, a hole transport layer, a light-emitting auxiliary layer, an electron blocking layer, or any combination thereof.
17. In paragraph 1, A first capping layer disposed on the outer side of the first electrode and comprising a first compound represented by the chemical formula 1; A second capping layer disposed on the outer side of the second electrode and comprising a first compound represented by the chemical formula 1; or A light-emitting element comprising the first capping layer and the second capping layer.
18. In paragraph 1, An electronic device comprising a light-emitting element according to any one of claims 1 to 8, 11 to 13 and 15 to 17.
19. In Paragraph 18, It further includes thin-film transistors, The above thin-film transistor includes a source electrode and a drain electrode, and An electronic device in which the first electrode of the light-emitting element is electrically connected to at least one of the source electrode and the drain electrode of the thin-film transistor.
20. In Paragraph 18, An electronic device further comprising a color filter, a color conversion layer, a touchscreen layer, a polarizing layer, or any combination thereof.

Description

Light Emitting Device and Electronic Apparatus Comprising the Same This relates to a light-emitting element and an electronic device including the same. Organic light-emitting devices are self-emissive devices that, compared to conventional devices, not only have a wide viewing angle and excellent contrast, but also have a fast response time, excellent characteristics in brightness, driving voltage and response speed, and are capable of multi-color. The above organic light-emitting device may have a structure in which a first electrode is disposed on a substrate, and a hole transport region, an emissive layer, an electron transport region, and a second electrode are sequentially formed on the first electrode. Holes injected from the first electrode move to the emissive layer via the hole transport region, and electrons injected from the second electrode move to the emissive layer via the electron transport region. Carriers such as holes and electrons recombine in the emissive layer region to generate excitons. Light is generated as these excitons change from an excited state to a ground state. FIGS. 1 to 3 are schematic diagrams showing the structure of a light-emitting element according to one embodiment. FIG. 4 is a schematic diagram showing the structure of an electronic device according to one embodiment. FIG. 5 is a schematic diagram showing the structure of an electronic device according to another embodiment. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but can be implemented in various forms. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated. Where an embodiment can be implemented differently, a specific process sequence may be performed differently from the order described. For example, two processes described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description. In the following embodiments, when it is stated that a membrane, region, component, etc. is connected, it includes not only cases where the membrane, region, or component is directly connected, but also cases where other membranes, regions, or components are interposed between them to form an indirect connection. For example, when it is stated in this specification that a membrane, region, component, etc. is electrically connected, it includes not only cases where the membrane, region, or component, etc. are directly electrically connected, but also cases where other membranes, regions, or components are interposed between them to form an indirect electrical connection. In this specification, "intermediate layer" is a term referring to a single and/or multiple layers disposed between the first electrode and the second electrode of the light-emitting element. A light-emitting element according to one aspect comprises: a first electrode; a second electrode facing the first electrode; and an intermediate layer disposed between the first electrode and the second electrode; wherein the intermediate layer comprises a light-emitting layer and an electron transport region, wherein the electron transport region is disposed between the light-emitting layer and the second electrode, and wherein the electron transport region comprises the first compound, an alkali metal halide, and a lanthanide metal, and wherein the first compound comprises one or more C8 - C60 carbocyclic groups or C8 - C60 heterocyclic groups. According to one embodiment, the electron transport region comprises a first layer and a seco