Light emitting device and electronic apparatus

Abstract

Embodiments provide a light emitting device and an electronic apparatus. The light emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode. The organic layer comprises m emission units; and (m-1) charge generation units each disposed between every two adjacent emission units among the m emission units. Each of the m emission units includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, and m is an integer of 2 or more. The m emission units comprise a first emission unit and a second emission unit, and the first emission unit comprises a 1-1 emission layer, a 2-1 emission layer and a 3-1 emission layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0123318 filed in the Korean Intellectual Property Office on September 15, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments relate to a light emitting device and an electronic device including the light emitting device. Background Art

[0004] The organic light emitting device is a self-emitting device having a wide viewing angle, a high contrast ratio, a short response time, and excellent characteristics in terms of brightness, driving voltage, and response speed compared to devices in the art.

[0005] In an example, an organic light-emitting device may have a structure in which a first electrode is arranged on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode may be sequentially formed on the first electrode. Holes provided from the first electrode move toward the emission layer through the hole transport region, and electrons provided from the second electrode move toward the emission layer through the electron transport region. Carriers such as holes and electrons recombine in the emission layer to generate excitons. Excitons may transition from an excited state to a ground state, thereby generating light.

[0006] It should be understood that this background technology section is intended to provide, in part, a useful background for understanding the technology. However, this background technology section may also include ideas, concepts or cognitions that are not part of the content known or understood by a person skilled in the relevant art before the corresponding effective filing date of the subject matter disclosed herein. Summary of the invention

[0007] Embodiments include a light emitting device having improved efficiency and an electronic device including the light emitting device.

[0008] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the disclosure.

[0009] According to an embodiment, a light emitting device may include: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer may include: m emission units; and m-1 charge generating units, each arranged between every two adjacent emission units among the m emission units. Each of the m emission units may include a first sub-pixel, a second sub-pixel, and a third sub-pixel, and m may be an integer of 2 or greater. The m emission units may include a first emission unit and a second emission unit, and the first emission unit may include a 1-1 emission layer, a 2-1 emission layer, and a 3-1 emission layer. The 1-1 emission layer may be arranged on the first sub-pixel of the first emission unit and may emit a first color light, the 2-1 emission layer may be arranged on the second sub-pixel of the first emission unit and may emit a second color light, and the 3-1 emission layer may be arranged in common throughout the first sub-pixel, the second sub-pixel, and the third sub-pixel of the first emission unit and may emit a third color light. The 1-1 emission layer may include a 1-1 host, the 2-1 emission layer may include a 2-1 host, and the 3-1 emission layer may include a 3-1 host. The lowest unoccupied molecular orbital (LUMO) energy (LUMO 1-1 ) level, the LUMO energy (LUMO 2-1 ) level and the LUMO energy (LUMO 3-1 ) level can satisfy conditions a1 and b1:

[0010] [Condition a1]

[0011] LUMO 1-1 <LUMO 3-1

[0012] [Condition b1]

[0013] LUMO 2-1 <LUMO 3-1 .

[0014] In an embodiment, the first color light may be red light, the second color light may be green light, and the third color light may be blue light.

[0015] In an embodiment, the m-1 charge generation units may each include an n-type charge generation layer and a p-type charge generation layer.

[0016] In an embodiment, the second emission unit may include a 1-2 emission layer, a 2-2 emission layer and a 3-2 emission layer; the 1-2 emission layer may be arranged on the first sub-pixel of the second emission unit and may emit a first color light; the 2-2 emission layer may be arranged on the second sub-pixel of the second emission unit and may emit a second color light; and the 3-2 emission layer:

[0017] may be commonly arranged throughout the first sub-pixel of the second emission unit, the second sub-pixel of the second emission unit, and the third sub-pixel of the second emission unit and may emit a third color light; or

[0018] The optical fiber may be disposed on a third sub-pixel of the second emission unit and may emit a third color light.

[0019] In an embodiment, the LUMO 1-1 Level, the LUMO 2-1 Level and the LUMO 3-1 The level may satisfy condition c1 and condition d1 explained below.

[0020] In an embodiment, the 3-1 emission layer may be arranged on or below the 1-1 emission layer and the 2-1 emission layer.

[0021] In an embodiment, the 1-1 host and the 2-1 host may each independently be a C 1 -C 60 Heteroaryl compounds.

[0022] In an embodiment, the 1-1 host and the 2-1 host are each independently a compound represented by Formula 1 explained below.

[0023] In an embodiment, L 1 To L 3 may be independently a single bond, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 30 Arylene is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 30 Heteroarylene.

[0024] In the embodiment, Ar 1 To Ar 3 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R10a Substituted C 6 -C 60 Aryl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl or -Si(Q 1 )(Q 2 )(Q 3 ).

[0025] In an embodiment, R 1 and R 2 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl.

[0026] In an embodiment, the 1-1 host and the 2-1 host may each be independently selected from the compounds explained below.

[0027] In an embodiment, the first emission unit may include a first hole transport region and a first electron transport region, and the second emission unit may include a second hole transport region and a second electron transport region.

[0028] In an embodiment, the first electrode may be an anode; the second electrode may be a cathode; the first hole transport region and the second hole transport region may each independently include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer or any combination thereof; and the first electron transport region and the second electron transport region may each independently include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer or any combination thereof.

[0029] In an embodiment, the first electron transport region may include a first electron transport material; and the lowest unoccupied molecular orbital (LUMO) energy (LUMO ET1 ) level and the LUMO energy (LUMO 3-1 ) level can satisfy condition e1 described below.

[0030] In an embodiment, the first electron transport region may include a first electron transport material; and the lowest unoccupied molecular orbital (LUMO) energy (LUMO ET1 ) level and the LUMO energy (LUMO 3-1 ) level can satisfy the condition f1 described below.

[0031] In an embodiment, the light emitting device may further include: a first capping layer outside the first electrode; or a second capping layer outside the second electrode.

[0032] An embodiment provides an electronic device, which may include the light emitting device.

[0033] In an embodiment, the electronic device may further include: a thin film transistor, wherein the thin film transistor may include a source electrode and a drain electrode, and the first electrode of the light emitting device may be electrically connected to the source electrode or the drain electrode.

[0034] In an embodiment, the electronic device may further include: a color filter, a color conversion layer, a touch screen layer, a polarization layer, or any combination thereof.

[0035] It should be understood that the above embodiments have been described in a general and illustrative sense only and not for purposes of limitation, and the present disclosure is not limited to the embodiments described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other aspects and features of the present disclosure will become more apparent by describing in detail embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0037] Figure 1 , Figure 2A and Figure 2B Each is a schematic cross-sectional view of a light emitting device according to an embodiment;

[0038] Figure 3 and Figure 4 Each is a schematic cross-sectional view showing an electronic device according to an embodiment; and

[0039] Figure 5 and Figure 6 Each shows a spectrum for determining whether or not there is color mixing according to brightness. DETAILED DESCRIPTION

[0040] The present disclosure will now be described more fully below with reference to the accompanying drawings showing embodiments. However, the present disclosure may be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0041] In the drawings, for ease of description and for clarity, the size, thickness, ratio, and dimensions of elements may be exaggerated. The same reference numerals and / or the same reference symbols refer to the same elements throughout.

[0042] In the description, it will be understood that when an element (or region, layer, component, etc.) is referred to as being "on" another element, "connected to" another element, or "coupled to" another element, the element may be directly on, directly connected to, or directly coupled to the other element, or one or more intervening elements may be present between the element and the other element. In a similar sense, when an element (or region, layer, component, etc.) is described as "covering" another element, the element may directly cover the other element, or one or more intervening elements may be present between the element and the other element.

[0043] In the description, when an element is "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements. For example, "directly on" may mean that two layers or two elements are disposed without an additional element, such as an adhesive element, between the two layers or two elements.

[0044] As used herein, expressions used in the singular such as “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0045] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in a conjunction or disjunction sense and may be understood to be equivalent to "and / or".

[0046] In the specification and claims, for the purpose of its meaning and interpretation, the term "at least one of..." is intended to include the meaning of "at least one selected from the group consisting of..." For example, "at least one of A, B, and C" can be understood to mean only A, only B, only C, or any combination of two or more of A, B, and C (such as ABC, AC, BC, or AB). The term "at least one of...", when following a series of elements, modifies the entire series of elements, rather than the individual elements in the series.

[0047] It will be understood that, although the terms first, second, etc. can be used in this article to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, without departing from the teaching of the present disclosure, the first element can be referred to as the second element. Similarly, without departing from the scope of the present disclosure, the second element can be referred to as the first element.

[0048] For ease of description, spatially relative terms such as "below", "under", "below", "above", or "on" may be used herein to describe the relationship between one element or component and another element or component as shown in the drawings. It will be understood that, in addition to the orientations depicted in the drawings, spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, in the case of a device shown in a flipped drawing, a device positioned "below" or "below" another device may be placed "above" another device. Therefore, the illustrative term "below" may include both a lower position and an upper position. The device may also be oriented in other directions, and therefore spatially relative terms may be interpreted differently depending on the orientation.

[0049] The terms "about" or "approximately" as used herein include the stated value and mean within an acceptable range of deviation of the stated value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of the recited quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±20%, ±10%, or ±5% of the stated value.

[0050] It should be understood that the terms “comprises / comprising,” “includes / including,” “have / having,” and “contains / containing” and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof in the present disclosure, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0051] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that, unless explicitly defined in the specification, terms (such as those defined in a commonly used dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an ideal or overly formal sense.

[0052] The term “organic layer” as used herein may be a single layer and / or a plurality of layers between a first electrode and a second electrode of a light emitting device.

[0053] The nomenclature of 1-1, 2-1 and 3-1 may also be considered as first-first, second-first and third-first, respectively, herein. However, these are only non-limiting descriptors, and other combinations may be used. For example, 3-2 may be considered as third-second. It should be understood that, for example, 1-second and first-2 may each be considered as first-second and may be interchangeable.

[0054] The embodiment provides a light-emitting device, which may include: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer may include: m emission units; and m-1 charge generation units, each arranged between every two adjacent emission units among the m emission units. Each of the m emission units may include a first sub-pixel, a second sub-pixel, and a third sub-pixel; and m may be an integer of 2 or greater. The m emission units may include a first emission unit and a second emission unit, wherein the first emission unit may include a 1-1 emission layer, a 2-1 emission layer, and a 3-1 emission layer. The 1-1 emission layer may be arranged on a first sub-pixel of the first emission unit and may emit a first color light, the 2-1 emission layer may be arranged on a second sub-pixel of the first emission unit and may emit a second color light, and the 3-1 emission layer may be arranged in common throughout the first sub-pixel, the second sub-pixel, and the third sub-pixel of the first emission unit and may emit a third color light. The 1-1 emission layer may include a 1-1 body, the 2-1 emission layer may include a 2-1 body, and the 3-1 emission layer may include a 3-1 body. 1-1 The lowest unoccupied molecular orbital (LUMO) energy of the host (LUMO 1-1 ) level, LUMO energy of 2-1 main body (LUMO 2-1 ) level and the LUMO energy of the 3-1 subject (LUMO 3-1 ) level can satisfy conditions a1 and b1:

[0055] [Condition a1]

[0056] LUMO 1-1 <LUMO 3-1

[0057] [Condition b1]

[0058] LUMO 2-1 <LUMO 3-1 .

[0059] The first color light, the second color light, and the third color light may be the same as or different from each other.

[0060] In an embodiment, the first color light may be red light, the second color light may be green light, and the third color light may be blue light.

[0061] In an embodiment, LUMO 1-1 Level, LUMO 2-1 Level and LUMO 3-1 The level can satisfy condition c1 and condition d1:

[0062] [Condition c1]

[0063] 0eV<LUMO3-1 -LUMO 1-1 ≤0.5eV

[0064] [Condition d1]

[0065] 0eV<LUMO 3-1 -LUMO 2-1 ≤0.5eV.

[0066] In an embodiment, the 3-1 emission layer may be arranged on the 1-1 emission layer and the 2-1 emission layer.

[0067] In an embodiment, the 3-1 emission layer may be arranged below the 1-1 emission layer and the 2-1 emission layer.

[0068] In an embodiment, the second emission unit may include a 1-2 emission layer, a 2-2 emission layer, and a 3-2 emission layer, wherein the 1-2 emission layer may be arranged on a first sub-pixel of the second emission unit and may emit a first color light, the 2-2 emission layer may be arranged on a second sub-pixel of the second emission unit and may emit a second color light, and the 3-2 emission layer may be commonly arranged throughout the first sub-pixel of the second emission unit, the second sub-pixel of the second emission unit, and the third sub-pixel of the second emission unit and may emit a third color light. The 1-2 emission layer may include a 1-2 body, the 2-2 emission layer may include a 2-2 body, and the 3-2 emission layer may include a 3-2 body.

[0069] In an embodiment, the second emission unit may include a 1-2 emission layer, a 2-2 emission layer, and a 3-3 emission layer, wherein the 1-2 emission layer may be arranged on a first sub-pixel of the second emission unit and may emit a first color light, the 2-2 emission layer may be arranged on a second sub-pixel of the second emission unit and may emit a second color light, and the 3-3 emission layer may be arranged on a third sub-pixel of the second emission unit and may emit a third color light. The 1-2 emission layer may include a 1-2 body, the 2-2 emission layer may include a 2-2 body, and the 3-3 emission layer may include a 3-3 body.

[0070] In the embodiment, the LUMO of the 1-2 host 1-2 Horizontal, 2-2 body LUMO 2-2 LUMO of horizontal and 3-2 bodies 3-2 The level can satisfy condition a2 and condition b2:

[0071] [Condition a2]

[0072] LUMO 1-2 <LUMO 3-2

[0073] [Condition b2]

[0074] LUMO 2-2 <LUMO 3-2 .

[0075] In an embodiment, LUMO 1-2 Level, LUMO 2-2 Level and LUMO 3-2 The level can satisfy condition c2 and condition d2:

[0076] [Condition c2]

[0077] 0eV<LUMO 3-2 -LUMO 1-2 ≤0.5eV

[0078] [Condition d2]

[0079] 0eV<LUMO 3-2 -LUMO 2-2 ≤0.5eV.

[0080] In an embodiment, the 3-2 emission layer may be arranged on the 1-2 emission layer and the 2-2 emission layer.

[0081] In an embodiment, the 3-2 emission layer may be arranged below the 1-2 emission layer and the 2-2 emission layer.

[0082] The first transmitting unit and the second transmitting unit may have the same structure or structures different from each other.

[0083] In an embodiment, the first emission unit may be arranged closest to the first electrode, and the second emission unit may be arranged closest to the second electrode.

[0084] In an embodiment, the second emission unit may be arranged closest to the first electrode, and the first emission unit may be arranged closest to the second electrode.

[0085] In an embodiment, the 1-1 host, the 2-1 host, the 1-2 host, and the 2-2 host may each independently be a C 1 -C 60 For example, the 1-1 host, the 2-1 host, the 1-2 host, and the 2-2 host may each independently be a compound including an electron accepting group.

[0086] In an embodiment, the 1-1 host, the 2-1 host, the 1-2 host, and the 2-2 host may each independently be a compound represented by Formula 1:

[0087] [Formula 1]

[0088]

[0089] In formula 1,

[0090] X 1 It can be C(R 1 ) or N, and X 2 It can be C(R 2 ) or N,

[0091] L 1 To L 3 may be independently a single bond, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Arylene is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroarylene,

[0092] a1 to a3 can each independently be an integer from 1 to 5,

[0093] Ar 1 To Ar 3 , R 1 and R 2 can be each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryloxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Arylthio, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O) 2 (Q 1 ) or -P(=O)(Q 1 )(Q 2 ),

[0094] L 1 To L 3 ,Ar 1 To Ar 3 , R 1 and R 2 Two or more adjacent groups in the group may be optionally bonded together (ie, may or may not be bonded together) to form an unsubstituted or substituted group. 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0095] R 10a Can be:

[0096] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0097] C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, -Si(Q 11 )(Q 12 )(Q 13 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q12 ) or any combination thereof;

[0098] C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy or C 6 -C 60 Arylthio, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, -Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or any combination thereof; or

[0099] -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 ),and

[0100] Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23and Q 31 To Q 33 can be independently: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C 1 -C 60 Alkyl; C 2 -C 60 Alkenyl; C 2 -C 60 Alkynyl; C 1 -C 60 Alkoxy; or C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic groups, each unsubstituted or substituted with deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 or any combination thereof.

[0101] In the embodiment, in Formula 1, L 1 To L 3 may be independently a single bond, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 30 Arylene is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 30 Heteroarylene.

[0102] In the embodiment, in Formula 1, Ar 1 To Ar 3 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl or -Si(Q 1 )(Q 2 )(Q 3 ).

[0103] In the embodiment, in Formula 1, R1 and R 2 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl.

[0104] In an embodiment, the 1-1 host, the 2-1 host, the 1-2 host, and the 2-2 host may each not include an anthracene group.

[0105] In an embodiment, the 1-1 host, the 2-1 host, the 1-2 host and the 2-2 host can each be independently selected from the following compounds:

[0106]

[0107]

[0108] In an embodiment, the 3-1 host and the 3-2 host can be each independently selected from the following compounds:

[0109]

[0110]

[0111]

[0112] The number m of emission units may vary depending on the purpose, and the upper limit of the number is not particularly limited. In an embodiment, the light emitting device may include 2, 3, 4, 5 or 6 emission units. The emission unit is not particularly limited as long as it has a function of being able to emit light. In an embodiment, the emission unit may include one or more emission layers. In an embodiment, the emission unit may also include an organic layer other than the emission layer.

[0113] The emission layers included in the m emission units can each independently emit red light, green light, blue light and / or white light. For example, the emission layer (multiple emission layers) included in a emission unit among the m emission units can emit blue light, the emission layer (multiple emission layers) included in b emission units among the m emission units can emit red light, the emission layer (multiple emission layers) included in c emission units among the m emission units can emit green light, and the emission layer (multiple emission layers) included in d emission units among the m emission units can emit white light. The sum of a, b, c and d can be m, and each of a, b, c and d is an integer of 0 or greater.

[0114] In an embodiment, the maximum emission wavelength of light emitted from at least one of the m emission units may be different from the maximum emission wavelength of light emitted from at least one of the remaining emission units. In an embodiment, in a light-emitting device in which a first emission unit and a second emission unit are stacked, the maximum emission wavelength of light emitted from the first emission unit may be different from the maximum emission wavelength of light emitted from the second emission unit. In an embodiment, the emission layer of the first emission unit and the emission layer of the second emission unit may each independently have a structure composed of layers composed of a single material, a structure composed of layers including different materials, and a structure having multiple layers including different materials. Therefore, the light emitted from the first emission unit or the second emission unit may be single color light or mixed color light.

[0115] In an embodiment, the maximum emission wavelengths of light emitted from the m emission units may all be the same.

[0116] In an embodiment, the m emission layers included in the m emission units may each independently include a phosphorescent dopant, a fluorescent dopant, a delayed fluorescent material, or any combination thereof.

[0117] The charge generation layer may be included between each two adjacent emission units among the m emission units. The term "adjacent" refers to the arrangement relationship of the emission units arranged closest to each other among a plurality of adjacent emission units. In an embodiment, "two adjacent emission units" may be the arrangement relationship of two emission units arranged closest to each other from among the emission units. The term "adjacent" may be a situation where two layers are physically in contact with each other or another layer not mentioned may be between the two layers. For example, "an emission unit adjacent to the second electrode" may be an emission unit arranged closest to the second electrode. The second electrode and the emission unit may be in physical contact with each other, but layers other than the emission unit may be between the second electrode and the emission unit. In an embodiment, the electron transport layer may be between the second electrode and the emission unit. Here, the charge generation layer may be arranged between each two adjacent emission units.

[0118] A "charge generation layer" can generate electrons with respect to one of two adjacent emission units and can therefore be used as a cathode. A "charge generation layer" can generate holes with respect to the other of two adjacent emission units and can therefore be used as an anode. In this regard, a charge generation layer refers to a layer that is not directly connected to an electrode and separates adjacent emission units. A light-emitting device including m emission units may include m-1 charge generation layers.

[0119] The charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. In an embodiment, the n-type charge generation layer and the p-type charge generation layer may contact each other (e.g., directly contact) to form an NP junction. Through the NP junction, electrons and holes may be generated between the n-type charge generation layer and the p-type charge generation layer. The generated electrons may be transferred to one of two adjacent emission units through the n-type charge generation layer. The generated holes may be transferred to another emission unit of two adjacent emission units through the p-type charge generation layer. In an embodiment, m-1 charge generation layers may each include an n-type charge generation layer and a p-type charge generation layer. Therefore, a light-emitting device including m-1 charge generation layers may include m-1 n-type charge generation layers and m-1 p-type charge generation layers.

[0120] The n-type refers to the n-type semiconductor property, that is, the property of injecting or transporting electrons. The p-type refers to the p-type semiconductor property, that is, the property of injecting or transporting holes.

[0121] The m emission units may each include a hole transport region, an emission layer, and an electron transport region arranged in the order recited. In an embodiment, the first emission unit may include a first hole transport region and a first electron transport region, and the second emission unit may include a second hole transport region and a second electron transport region.

[0122] In an embodiment, the first emission unit may include a first electron transport region including a first electron transport material, and the LUMO energy (LUMO ET1 ) level and the LUMO energy of the 3-1 subject (LUMO 3-1 ) level can satisfy condition e1:

[0123] [Condition e1]

[0124] LUMO 3-1 ≥LUMO ET1 .

[0125] In an embodiment, the first emission unit may include a first electron transport region including a first electron transport material, and the LUMO energy (LUMO ET1 ) level and the LUMO energy of the 3-1 subject (LUMO3-1 ) level can satisfy condition f1:

[0126] [Condition f1]

[0127] 0eV≤LUMO 3-1 -LUMO ET1 ≤0.3eV.

[0128] In an embodiment, the second emission unit may include a second electron transport region including a second electron transport material, and the LUMO energy (LUMO ET2 ) level and the LUMO energy of the 3-2 body (LUMO 3-2 ) level can satisfy condition e2:

[0129] [Condition e2]

[0130] LUMO 3-2 ≥LUMO ET2 .

[0131] In an embodiment, the second emission unit may include a second electron transport region including a second electron transport material, and the LUMO energy (LUMO ET2 ) level and the LUMO energy of the 3-2 body (LUMO 3-2 ) level can satisfy condition f2:

[0132] [Condition f2]

[0133] 0eV≤LUMO 3-2 -LUMO ET2 ≤0.3eV.

[0134] In the light-emitting device satisfying condition e1 and / or condition e2, the injection of electrons from the first electron transport region to the 3-1 emission layer and / or the injection of electrons from the second electron transport region to the 3-2 emission layer can be promoted. In the light-emitting device satisfying condition f1 and / or condition f2, the formation of an excessively large gap can lead to a high injection barrier, which increases the driving voltage and prevents degradation of the material.

[0135] The light-emitting device may be a tandem device in which at least one emission unit includes a common emission layer commonly arranged throughout the first sub-pixel, the second sub-pixel, and the third sub-pixel, and the common emission layer may be a blue common emission layer. In the case of a tandem device in which two or more emission units each include a common emission layer, a plurality of emission units emitting light may be included, so that the efficiency of the device may be significantly improved compared to a light-emitting device consisting of a single stack including a common emission layer. Therefore, the current stress on the device may be reduced, thereby improving the service life of the device.

[0136] In an embodiment, the first emission unit may satisfy the conditions that the LUMO energy level of the 1-1 host is less than the LUMO energy level of the 3-1 host and the LUMO energy level of the 2-1 host is less than the LUMO energy level of the 3-1 host, and thus there is no potential barrier when electrons are injected from the 3-1 emission layer as a common emission layer to the 1-1 emission layer and the 2-1 emission layer. In this regard, the driving voltage can be minimized due to the common emission layer.

[0137] Therefore, a light emitting device (eg, an organic light emitting device) may have high light emitting efficiency and a long lifetime.

[0138] In an embodiment, a process of manufacturing a light emitting device may be simplified by including a blue common emission layer, and thus processability of the light emitting device may be improved compared to a light emitting device not including a blue common emission layer.

[0139] In an embodiment, the first electrode may be an anode; the second electrode may be a cathode; the first hole transport region and the second hole transport region may each independently include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer or any combination thereof; and the first electron transport region and the second electron transport region may each independently include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer or any combination thereof.

[0140] In an embodiment, the light emitting device may further include a first capping layer outside the first electrode or a second capping layer outside the second electrode.

[0141] Another embodiment provides an electronic device that may include a light emitting device. The electronic device may further include a thin film transistor. In an embodiment, the electronic device may further include a thin film transistor including a source electrode and a drain electrode, wherein the first electrode of the light emitting device may be electrically connected to the source electrode or the drain electrode. In an embodiment, the electronic device may further include a color filter, a color conversion layer, a touch screen layer, a polarization layer, or any combination thereof. Further details about the electronic device may be the same as described herein.

[0142] [ Figure 1 Description]

[0143] Figure 1 2 is a schematic cross-sectional view of a light emitting device 20 according to an embodiment. The light emitting device 20 shows an embodiment of a light emitting device in which m is 2, but the embodiment is not limited thereto.

[0144] like Figure 1As shown in FIG. 1 , the light emitting device 20 includes a first electrode 110, a second electrode 190 facing the first electrode 110, and an organic layer 150. The organic layer 150 may include two emission units 150-1 and 150-2 stacked between the first electrode 110 and the second electrode 190, and a charge generation layer 170-1.

[0145] The light emitting device 20 may include a first emission unit 150 - 1 and a second emission unit 150 - 2 .

[0146] The first emission unit 150 - 1 and the second emission unit 150 - 2 may each include a first sub-pixel SP1 , a second sub-pixel SP2 , and a third sub-pixel SP3 .

[0147] The first emission unit 150 - 1 may include a first hole transport region 140 - 1 , a first emission layer 152 - 1 , and a first electron transport region 160 - 1 stacked in the stated order.

[0148] The first emission layer 152 - 1 may include a 1-1 emission layer 152 a - 1 , a 2-1 emission layer 152 b - 1 , and a 3-1 emission layer 152 c - 1 .

[0149] The 1-1 emission layer 152a-1 may be arranged on the first subpixel SP1 of the first emission unit 150-1, the 2-1 emission layer 152b-1 may be arranged on the second subpixel SP2 of the first emission unit 150-1, and the 3-1 emission layer 152c-1 may be commonly arranged on the first subpixel SP1, the second subpixel SP2 and the third subpixel SP3 of the first emission unit 150-1.

[0150] The second emission unit 150 - 2 may include a second hole transport region 140 - 2 , a second emission layer 152 - 2 , and a second electron transport region 160 - 2 stacked in the stated order.

[0151] The second emission layer 152 - 2 may include a 1-2 emission layer 152 a - 2 , a 2-2 emission layer 152 b - 2 , and a 3-2 emission layer 152 c - 2 .

[0152] The 1-2 emission layer 152a-2 may be arranged on the first subpixel SP1 of the second emission unit 150-2, the 2-2 emission layer 152b-2 may be arranged on the second subpixel SP2 of the second emission unit 150-2, and the 3-2 emission layer 152c-2 may be commonly arranged on the first subpixel SP1, the second subpixel SP2 and the third subpixel SP3 of the second emission unit 150-2.

[0153] The first electron transport region 160 - 1 and the second electron transport region 160 - 2 may each independently include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0154] The first electron transport region 160-1 may include a first electron transport material, and the second electron transport region 160-2 may include a second electron transport material. The first electron transport material and the second electron transport material may be the same as described herein.

[0155] The light emitting device 20 may include a first charge generation layer 170 - 1 between the first emission unit 150 - 1 and the second emission unit 150 - 2 .

[0156] The first charge generation layer 170-1 may include a first n-type charge generation layer 171-1 and a first p-type charge generation layer 172-1. The first n-type charge generation layer 171-1 may contact (eg, directly contact) the first p-type charge generation layer 172-1.

[0157] In the following, reference will be made to Figure 1 A structure of a light emitting device 20 and a method of manufacturing the light emitting device 20 according to the embodiment are described.

[0158] [First electrode 110]

[0159] exist Figure 1 In the embodiment, a substrate may be further included under the first electrode 110 or on the second electrode 190. In an embodiment, the substrate may be a glass substrate or a plastic substrate, but is not limited thereto. In an embodiment, the substrate may be a flexible substrate and may include a plastic having excellent heat resistance and durability (such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof).

[0160] The first electrode 110 may be formed by, for example, depositing or sputtering a material for forming the first electrode 110 on a substrate. When the first electrode 110 is an anode, the material for forming the first electrode 110 may be a high work function material that facilitates injection of holes.

[0161] The first electrode 110 may be a reflective electrode, a semi-transmissive electrode or a transmissive electrode. In an embodiment, when the first electrode 110 is a transmissive electrode, a material for forming the first electrode 110 may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2), zinc oxide (ZnO), or any combination thereof. In an embodiment, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material used to form the first electrode 110 may include magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or any combination thereof.

[0162] The first electrode 110 may have a structure consisting of a single layer or a structure including a plurality of layers. For example, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO.

[0163] [Organic layer 150]

[0164] The organic layer 150 may be disposed on the first electrode 110. The organic layer 150 may include emission layers 152-1 and 152-2.

[0165] In an embodiment, the organic layer 150 may include two emission units 150-1 and 150-2 stacked between the first electrode 110 and the second electrode 190 and a charge generation layer 170-1 between the two emission units 150-1 and 150-2. In an embodiment, when the organic layer 150 includes the emission units 150-1 and 150-2 and the charge generation layer 170-1, the light emitting device 10 may be a tandem light emitting device.

[0166] The two emission units 150 - 1 and 150 - 2 may respectively include hole transport regions 140 - 1 and 140 - 2 , emission layers 152 - 1 and 152 - 2 , and electron transport regions 160 - 1 and 160 - 2 stacked in their respective order.

[0167] The organic layer 150 may further include a metal-containing compound such as an organic metal compound or an inorganic material such as a quantum dot, etc., in addition to various organic materials.

[0168] [Hole Transport Zones 140 - 1 and 140 - 2 in the Organic Layer 150 ]

[0169] The hole transport regions 140 - 1 and 140 - 2 may each have a structure composed of a layer composed of a single material, a structure composed of layers including different materials, or a structure having a plurality of layers including different materials.

[0170] The hole transport regions 140 - 1 and 140 - 2 may each independently include a hole injection layer, a hole transport layer, an emission assisting layer, an electron blocking layer, or any combination thereof.

[0171] For example, the hole transport regions 140-1 and 140-2 may each independently have a multilayer structure including a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission auxiliary layer structure, a hole injection layer / emission auxiliary layer structure, a hole transport layer / emission auxiliary layer structure, or a hole injection layer / hole transport layer / emission auxiliary layer structure, wherein the layers of each structure may be stacked from the first electrode 110 in their respective stated order, but the structures of the hole transport regions 140-1 and 140-2 are not limited thereto.

[0172] In an embodiment, the hole transport regions 140-1 and 140-2 may each independently include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof:

[0173] [Formula 201]

[0174]

[0175] [Formula 202]

[0176]

[0177] In equation 201 and equation 202,

[0178] L 201 To L 204 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0179] L 205 Can be *-O-*', *-S-*', *-N(Q 201 )-*', unsubstituted or replaced by at least one R 10a Substituted C 1 -C 20 Alkylene, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 20 Alkenylene, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0180] xa1 to xa4 can each independently be an integer from 0 to 5,

[0181] xa5 can be an integer from 1 to 10,

[0182] R 201 To R 204 and Q 201 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0183] R 201 and R 202 may be optionally substituted via a single bond, unsubstituted or substituted by at least one R 10a Substituted C 1 -C 5 Alkylene is either unsubstituted or substituted with at least one R 10a Substituted C 2 -C 5 The alkenylene groups are connected to each other to form an unsubstituted or substituted R 10a Substituted C 8 -C 60 Polycyclic group (for example, compound HT16, etc.) (for example, carbazole group, etc.).

[0184] R 203 and R 204 may be optionally substituted via a single bond, unsubstituted or substituted by at least one R 10a Substituted C 1 -C 5 Alkylene is either unsubstituted or substituted with at least one R 10a Substituted C 2 -C 5 The alkenylene groups are connected to each other to form an unsubstituted or substituted R 10a Substituted C 8 -C 60 Polycyclic groups, and

[0185] na1 can be an integer from 1 to 4.

[0186] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each independently include at least one of the groups represented by Formulas CY201 to CY217:

[0187]

[0188] In formula CY201 to formula CY217, R 10b and R 10c can be independently compared with R 10a Same as described, CY 201 To Ring CY 204 Can be independently C 3 -C 20 Carbocyclic or C 1 -C 20 heterocyclic group, and at least one hydrogen in Formula CY201 to Formula CY217 may be unsubstituted or replaced by R 10a replace.

[0189] In the embodiment, in Formula CY201 to Formula CY217, ring CY 201 To Ring CY 204 Each independently may be phenyl, naphthyl, phenanthryl or anthracenyl.

[0190] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each independently include at least one of the groups represented by Formulas CY201 to CY203.

[0191] In an embodiment, the compound represented by Formula 201 may include at least one of the groups represented by Formulas CY201 to CY203 and at least one of the groups represented by Formulas CY204 to CY217.

[0192] In the embodiment, in formula 201, xa1 may be 1, R 201 may be one of the groups represented by Formula CY201 to Formula CY203, xa2 may be 0, and R 202 It may be one of the groups represented by Formula CY204 to Formula CY207.

[0193] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may not include the groups represented by Formula CY201 to Formula CY203.

[0194] In an embodiment, each of Formula 201 and Formula 202 may each not include the group represented by Formula CY201 to Formula CY203, and may each independently include at least one of the groups represented by Formula CY204 to Formula CY217.

[0195] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may not include the groups represented by Formula CY201 to Formula CY217.

[0196] In an embodiment, the hole transport regions 140-1 and 140-2 may each independently include one of compounds HT1 to HT46, m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), or any combination thereof:

[0197]

[0198]

[0199]

[0200]

[0201]

[0202] The thickness of the hole transport regions 140-1 and 140-2 may be independently about To about For example, the thickness of the hole transport regions 140-1 and 140-2 may be independently about To about When the hole transport regions 140-1 and 140-2 include a hole injection layer, a hole transport layer, or any combination thereof, the thickness of the hole injection layer may be independently about To about and the thickness of the hole transport layer can be independently in the range of about To about For example, the thickness of the hole injection layer can be independently about To about For example, the thickness of the hole transport layer can be independently about To about When the thicknesses of the hole transport regions 140-1 and 140-2, the hole injection layer, and the hole transport layer are within these ranges, satisfactory hole transport characteristics may be obtained without significantly increasing the driving voltage.

[0203] The emission auxiliary layer can improve light emission efficiency by compensating the optical resonance distance according to the wavelength of light emitted by the emission layer 152-1 or 152-2, and the electron blocking layer can block electrons from leaking from the emission layer to the hole transport regions 140-1 and 140-2. The material that can be included in the hole transport regions 140-1 and 140-2 can be included in the emission auxiliary layer and the electron blocking layer.

[0204] [p-dopant]

[0205] In addition to the aforementioned materials, the hole transport regions 140-1 and 140-2 may each independently include a charge generating material for improving conductive properties. The charge generating material may be uniformly or non-uniformly dispersed in the hole transport region 140-1 or 140-2 (eg, in the form of a single layer consisting of the charge generating material).

[0206] The charge generating material may be, for example, a p-dopant.

[0207] For example, the p-dopant may have a LUMO energy level that may be equal to or less than approximately -3.5 eV.

[0208] In an embodiment, the p-dopant may include a quinone derivative, a cyano group-containing compound, a compound including the element EL1 and the element EL2, or any combination thereof.

[0209] Examples of quinone derivatives may include TCNQ and F4-TCNQ, etc.:

[0210]

[0211] Examples of the cyano group-containing compound may include HAT-CN and a compound represented by Formula 221, etc.:

[0212]

[0213] [Formula 221]

[0214]

[0215] In formula 221,

[0216] R 221 To R 223 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 a heterocyclic group, and

[0217] R221 To R 223 At least one of them can be independently: C 3 -C 60 Carbocyclic or C 1 -C 60 heterocyclic group, each substituted by the following groups: cyano; -F; -Cl; -Br; -I; C substituted by cyano, -F, -Cl, -Br, -I or any combination thereof 1 -C 20 or any combination thereof.

[0218] In the compound including the element EL1 and the element EL2, the element EL1 may be a metal, a metalloid, or any combination thereof, and the element EL2 may be a nonmetal, a metalloid, or any combination thereof.

[0219] Examples of metals may include alkali metals (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metals (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); transition metals (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), etc. (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); late transition metals (e.g., zinc (Zn), indium (In), tin (Sn), etc.); and lanthanide metals (e.g., 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), etc.), etc.

[0220] Examples of metalloids may include silicon (Si), antimony (Sb), tellurium (Te), and the like.

[0221] Examples of non-metal may include oxygen (O) and halogen (eg, F, Cl, Br, I, etc.), and the like.

[0222] Examples of compounds containing element EL1 and element EL2 may include metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, metal iodides, etc.), metalloid halides (e.g., metalloid fluorides, metalloid chlorides, metalloid bromides, metalloid iodides, etc.), metal tellurides, or any combination thereof.

[0223] Examples of metal oxides may include tungsten oxide (eg, WO, W 2 O 3 , WO 2 , WO 3 , W 2 O 5 etc.), vanadium oxide (e.g., VO, V 2 O 3 , VO 2 、V 2 O 5 etc.), molybdenum oxides (e.g., MoO, Mo 2 O 3 、MoO 2 、MoO 3 、Mo 2 O 5 etc.) and rhenium oxide (e.g., ReO 3 etc.

[0224] Examples of the metal halide may include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, lanthanide metal halides, and the like.

[0225] Examples of alkali metal halides may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, and the like.

[0226] Examples of alkaline earth metal halides may include BeF 2 MgF 2 , CaF 2 , SrF 2 , BaF 2 、BeCl 2 MgCl 2 , CaCl 2 、SrCl 2 、BaCl 2 ,BeBr 2 MgBr 2 , CaBr 2 , SrBr 2 ,BaBr 2 ,BeI 2 MgI 2 ,CaI 2 , SrI 2 and BaI 2 wait.

[0227] Examples of transition metal halides may include titanium halides (eg, TiF 4 、TiCl4 、TiBr 4 、TiI 4 etc.), zirconium halides (e.g., ZrF 4 、ZrCl 4 , ZrBr 4 , ZrI 4 etc.), hafnium halides (e.g., HfF 4 , HfCl 4 , HfBr 4 , HfI 4 etc.), vanadium halides (e.g., VF 3 、VCl 3 , VBr 3 VI 3 etc.), niobium halides (e.g., NbF 3 、NbCl 3 , NbBr 3 , NbI 3 etc.), tantalum halides (e.g., TaF 3 、TaCl 3 、TaBr 3 、TaI 3 etc.), chromium halides (e.g., CrF 3 CrCl 3 CrBr 3 CrI 3 etc.), molybdenum halides (e.g., MoF 3 、MoCl 3 、MoBr 3 、MoI 3 etc.), tungsten halides (e.g., WF 3 、WCl 3 , WBr 3 , WI 3 etc.), manganese halides (e.g., MnF 2 、MnCl 2 、MnBr 2 、MnI 2 etc.), technetium halides (e.g., TcF 2 , TcCl 2 、TcBr 2 , TcI 2 etc.), rhenium halides (e.g., ReF 2 、ReCl 2 、ReBr 2 、ReI 2 etc.), iron halides (e.g., FeF 2 、FeCl 2 , FeBr 2 ,FeI 2 etc.), ruthenium halides (e.g., RuF2 、RuCl 2 ,RuBr 2 , RuI 2 etc.), osmium halides (e.g., OsF 2 , OsCl 2 、OsBr 2 , OsI 2 etc.), cobalt halides (e.g., CoF 2 、CoCl 2 ,CoBr 2 、CoI 2 etc.), rhodium halides (e.g., RhF 2 , RhCl 2 , RhBr 2 , RhI 2 etc.), iridium halides (e.g., IrF 2 、IrCl 2 ,IrBr 2 , Ir I2 etc.), nickel halides (e.g., NiF 2 、NiCl 2 、NiBr 2 , NiI 2 etc.), palladium halides (e.g., PdF 2 , PdCl 2 , PdBr 2 , PdI 2 etc.), platinum halides (e.g., PtF 2 , PtCl 2 , PtBr 2 , PtI 2 etc.), copper halides (e.g., CuF, CuCl, CuBr, CuI, etc.), silver halides (e.g., AgF, AgCl, AgBr, AgI, etc.) and gold halides (e.g., AuF, AuCl, AuBr, AuI, etc.), etc.

[0228] Examples of late transition metal halides may include zinc halides (e.g., ZnF 2 、ZnCl 2 、ZnBr 2 、ZnI 2 etc.), indium halides (e.g., InI 3 etc.) and tin halides (e.g., SnI 2 etc.

[0229] Examples of lanthanide metal halides may include YbF, YbF 2 , YbF 3 、SmF 3 、YbCl、YbCl 2 YbCl3 、SmCl 3 , YbBr, YbBr 2 , YbBr 3 、SmBr 3 、YbI、YbI 2 ,YbI 3 and SmI 3 wait.

[0230] Examples of metalloid halides may include antimony halides (eg, SbCl 5 etc.

[0231] Examples of metal tellurides may include alkali metal tellurides (eg, Li 2 Te、Na 2 Te, K 2 Te、Rb 2 Te, Cs 2 Te, etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, BaTe, etc.), transition metal tellurides (e.g., TiTe 2 、ZrTe 2 、HfTe 2 、V 2 Te 3 , Nb 2 Te 3 、 2 Te 3 Cr 2 Te 3 、Mo 2 Te 3 , W 2 Te 3 , MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu 2 Te, CuTe, Ag 2 Te, AgTe, Au 2 Te, etc.), late transition metal tellurides (e.g., ZnTe, etc.), and lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, etc.), etc.

[0232] [Emission Layers 152-1 and 152-2 in Organic Layer 150]

[0233] When the light-emitting device 20 is a full-color light-emitting device, the emission layers 152-1 and 152-2 can be independently patterned into a red emission layer, a green emission layer and / or a blue emission layer according to each sub-pixel. In an embodiment, the emission layers 152-1 and 152-2 can each independently have a stacked structure of two or more layers among the red emission layer, the green emission layer and the blue emission layer, in which the two or more layers can contact each other or can be separated from each other to emit white light. In an embodiment, the emission layers 152-1 and 152-2 can each independently include two or more materials among the red light-emitting material, the green light-emitting material and the blue light-emitting material, and in the emission layers 152-1 and 152-2, the two or more materials can be mixed with each other in a single layer to emit white light.

[0234] The emission layers 152-1 and 152-2 may each independently include a host and a dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or any combination thereof.

[0235] The amount of the dopant in the emission layers 152 - 1 and 152 - 2 may each independently be in a range of about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host.

[0236] In an embodiment, emission layers 152-1 and 152-2 may each independently include quantum dots.

[0237] In an embodiment, the emission layers 152-1 and 152-2 may each independently include a delayed fluorescent material. The delayed fluorescent material may be used as a host or as a dopant in the emission layers 152-1 and 152-2.

[0238] The thickness of the emission layers 152-1 and 152-2 may be independently about To about For example, the thickness of the emission layers 152-1 and 152-2 may be independently about To about When the thicknesses of the emission layers 152-1 and 152-2 are each within any range within these ranges, excellent light emitting characteristics can be obtained without significantly increasing the driving voltage.

[0239] [main body]

[0240] In an embodiment, the host may include a compound represented by Formula 301:

[0241] [Formula 301]

[0242] [Ar 301 ] xb11 -[(L 301 )xb1 -R 301 ] xb21

[0243] In formula 301,

[0244] Ar 301 and L 301 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0245] xb11 can be 1, 2 or 3,

[0246] xb1 can be an integer from 0 to 5.

[0247] R 301 It can be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or replaced by at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 301 )(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O) 2 (Q 301 ) or -P(=O)(Q 301 )(Q 302 ),

[0248] xb21 can be an integer from 1 to 5, and

[0249] Q 301 To Q 303 You can each share your experience with Q 1 Same as described.

[0250] For example, in Formula 301, when xb11 is 2 or greater, two or more Ar 301 can be connected to each other via a single bond.

[0251] In an embodiment, the host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or any combination thereof:

[0252] [Formula 301-1]

[0253]

[0254] [Formula 301-2]

[0255]

[0256] In Formula 301-1 and Formula 301-2,

[0257] Ring A 301 To Ring A 304 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0258] X 301 Can be O, S, N[(L 304 ) xb4 -R 304 ]、C(R 304 )(R 305 ) or Si(R 304 )(R 305 ),

[0259] xb22 and xb23 can each independently be 0, 1 or 2,

[0260] L 301 , xb1 and R 301 may each be the same as described herein,

[0261] L 302 To L 304can be independently related to L 301 Same as described,

[0262] xb2 to xb4 may each independently be the same as described with respect to xb1, and

[0263] R 302 To R 305 and R 311 To R 314 can be respectively related to R 301 Same as described.

[0264] In an embodiment, the host may include an alkaline earth metal complex, a late transition metal complex, or any combination thereof. In an embodiment, the host may include a Be complex (eg, compound H55), a Mg complex, a Zn complex, or any combination thereof.

[0265] In an embodiment, the host may include: one of Compounds H1 to H124; 9,10-di(2-naphthyl)anthracene (ADN); 2-methyl-9,10-bis(naphthalene-2-yl)anthracene (MADN); 9,10-di(2-naphthyl)-2-tert-butyl-anthracene (TBADN); 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP); 1,3-di(9-carbazolyl)benzene (mCP); 1,3,5-tri(9-carbazolyl)benzene (TCP); or any combination thereof:

[0266]

[0267]

[0268]

[0269]

[0270]

[0271]

[0272] [Phosphorescent dopant]

[0273] The phosphorescent dopant may include at least one transition metal as a central metal.

[0274] The phosphorescent dopant may include a monodentate ligand, a bidentate ligand, a tridentate ligand, a tetradentate ligand, a pentadentate ligand, a hexadentate ligand, or any combination thereof.

[0275] The phosphorescent dopant may be electrically neutral.

[0276] In an embodiment, the phosphorescent dopant may include an organometallic compound represented by Formula 401:

[0277] [Formula 401]

[0278] M(L 401 ) xc1 (L 402 ) xc2

[0279] [Formula 402]

[0280]

[0281] In equations 401 and 402,

[0282] M may be a transition metal (e.g., iridium (Ir), platinum (Pt), palladium (Pd), osmium (Os), titanium (Ti), gold (Au), hafnium (Hf), europium (Eu), terbium (Tb), rhodium (Rh), rhenium (Re), or thulium (Tm)),

[0283] L 401 may be a ligand represented by Formula 402, and xc1 may be 1, 2 or 3, and when xc1 is 2 or greater, two or more L 401 can be the same or different from each other,

[0284] L 402 may be an organic ligand, and xc2 may be 0, 1, 2, 3 or 4, and when xc2 is 2 or greater, two or more L 402 can be the same or different from each other,

[0285] X 401 and X 402 can be N or C independently,

[0286] Ring A 401 and Ring A 402 Can be independently C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group,

[0287] T 401 It can be a single bond, *-O-*', *-S-*', *-C(=O)-*', *-N(Q 411 )-*'、*-C(Q 411 )(Q 412 )-*'、*-C(Q 411 )=C(Q 412 )-*'、*-C(Q 411 )=*'or*=C=*',

[0288] X 403 and X404 can be independently a chemical bond (e.g., a covalent bond or a coordination bond), O, S, N (Q 413 )、B(Q 413 )、P(Q 413 )、C(Q 413 )(Q 414 ) or Si(Q 413 )(Q 414 ),

[0289] Q 411 To Q 414 can be independently related to Q 1 Same as described,

[0290] R 401 and R 402 can be each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic 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 ),

[0291] Q 401 To Q 403 can be independently related to Q 1 Same as described,

[0292] xc11 and xc12 may each independently be an integer from 0 to 10, and

[0293] * and *' in Formula 402 each represent a binding site with M in Formula 401.

[0294] In an embodiment, in Formula 402, X 401 may be nitrogen, and X 402 Can be carbon, or X 401 and X 402 Each may be nitrogen.

[0295] In an embodiment, in Formula 402, when xc1 is 2 or greater, two or more L 401 The two rings A 401 It can be optionally connected via T as a linker 402 Connected to each other, or two rings A 402 Optionally, the T 403 are connected to each other (see Compound PD1 to Compound PD4 and Compound PD7). 402 and T 403 can be independently compared with T 401 Same as described.

[0296] In formula 401, L 402 It can be an organic ligand. For example, L 402 It may include a halogen group, a diketone group (e.g., an acetylacetonate group), a carboxylic acid group (e.g., a picolinate group), -C(=O), an isonitrile group, -CN, a phosphorus-containing group (e.g., a phosphine group, a phosphite group, etc.), or any combination thereof.

[0297] The phosphorescent dopant may include, for example, one of Compound PD1 to Compound PD39 or any combination thereof:

[0298]

[0299]

[0300]

[0301] [Fluorescent dopant]

[0302] The fluorescent dopant may include an amine group-containing compound, a styryl group-containing compound, or any combination thereof.

[0303] In an embodiment, the fluorescent dopant may include a compound represented by Formula 501:

[0304] [Formula 501]

[0305]

[0306] In formula 501,

[0307] Ar 501, L 501 To L 503 , R 501 and R 502 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0308] xd1 to xd3 may each independently be 0, 1, 2 or 3, and

[0309] xd4 can be 1, 2, 3, 4, 5 or 6.

[0310] In the embodiment, in Formula 501, Ar 501 It may be a fused cyclic group in which three or more monocyclic groups are fused together (for example, anthracenyl, pyrene, etc.).

[0311] In an embodiment, xd4 in equation 501 may be 2.

[0312] In an embodiment, the fluorescent dopant may include: one of compounds FD1 to FD36; DPVBi; DPAVBi; or any combination thereof:

[0313]

[0314]

[0315]

[0316] [Delayed fluorescence material]

[0317] In an embodiment, the emission layers 152 - 1 and 152 - 2 may each independently include a delayed fluorescent material.

[0318] In the specification, the delayed fluorescence material may be selected from compounds capable of emitting delayed fluorescence based on a delayed fluorescence emission mechanism.

[0319] The delayed fluorescent material included in the emission layer 152-1 or 152-2 may serve as a host or as a dopant depending on the type of other materials included in the emission layer 152-1 or 152-2.

[0320] In an embodiment, the difference between the triplet energy level (eV) of the delayed fluorescent material and the singlet energy level (eV) of the delayed fluorescent material may be in the range of about 0 eV to about 0.5 eV. When the difference between the triplet energy level (eV) of the delayed fluorescent material and the singlet energy level (eV) of the delayed fluorescent material satisfies the above range, up-conversion of the delayed fluorescent material from the triplet state to the singlet state may effectively occur, and therefore, the light emitting device 20 may have improved luminous efficiency.

[0321] In an embodiment, the delayed fluorescent material may include: a photosensitive material including at least one electron donor (eg, a π-electron-rich C 3 -C 60 cyclic groups, such as carbazolyl groups) and at least one electron acceptor (e.g., sulfoxide groups, cyano groups, and π-electron-deficient nitrogen-containing C 1 -C 60 or a C having at least two cyclic groups fused to each other while sharing boron (B). 8 -C 60 Polycyclic materials, etc.

[0322] Examples of the delayed fluorescent material may include at least one of Compound DF1 to Compound DF9:

[0323]

[0324] [Quantum dot]

[0325] In an embodiment, emission layers 152-1 and 152-2 may each independently include quantum dots.

[0326] In the specification, a 'quantum dot' may be a crystal of a semiconductor compound, and may include any material capable of emitting light of various emission wavelengths according to the size of the crystal.

[0327] The diameter of a quantum dot may be in the range of, for example, about 1 nm to about 10 nm.

[0328] Quantum dots can be synthesized by a wet chemical process, a metal organic chemical vapor deposition process, a molecular beam epitaxy process, or any process similar to these processes.

[0329] The wet chemical process is a method including mixing a precursor material with an organic solvent and growing a quantum dot particle crystal. When the crystal grows, the organic solvent naturally acts as a dispersant coordinated on the surface of the quantum dot crystal and controls the growth of the crystal so that the growth of the quantum dot particles can be controlled by a process with a lower cost and can be performed more easily than a vapor deposition method such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE).

[0330] Quantum dots may include Group II-VI semiconductor compounds; Group III-V semiconductor compounds; Group III-VI semiconductor compounds; Group I-III-VI semiconductor compounds; Group IV-VI semiconductor compounds; Group IV elements or compounds; or any combination thereof.

[0331] Examples of II-VI semiconductor compounds may include binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, and MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZ nSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe and MgZnS, etc.; quaternary compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe, etc.; or any combination thereof.

[0332] Examples of III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb, etc.; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAIP, InNAs, InNSb, InPAs, and InPSb, etc.; quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb, etc.; or any combination thereof. In an embodiment, the III-V semiconductor compound may further include a Group II element. Examples of the Group III-V semiconductor compound also including the Group II element may include InZnP, InGaZnP, InAlZnP, and the like.

[0333] Examples of III-VI semiconductor compounds may include binary compounds such as GaS, GaSe, Ga 2 Se 3、GaTe、InS、InSe、In 2 S 3 、In 2 Se 3 and InTe; ternary compounds such as InGaS 3 and InGaSe 3 etc.; or any combination thereof.

[0334] Examples of Group I-III-VI semiconductor compounds may include: ternary compounds such as AgInS, AgInS 2 、CuInS、CuInS 2 、CuGaO 2 、AgGaO 2 and AgAlO 2 etc.; or any combination thereof.

[0335] Examples of IV-VI semiconductor compounds may include: binary compounds such as SnS, SnSe, SnTe, PbS, PbSe and PbTe; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe and SnPbTe; quaternary compounds such as SnPbSSe, SnPbSeTe and SnPbSTe; or any combination thereof.

[0336] Examples of Group IV elements or compounds may include: single element materials such as Si and Ge; binary compounds such as SiC and SiGe; or any combination thereof.

[0337] Each element included in the multi-element compound such as the binary compound, the ternary compound, and the quaternary compound may be present in the particle at a uniform concentration or at a non-uniform concentration.

[0338] In an embodiment, the quantum dot may have a single structure in which the concentration of each element in the quantum dot is uniform, or the quantum dot may have a core-shell structure. For example, the material included in the core and the material included in the shell may be different from each other.

[0339] The shell of the quantum dot can be used as a protective layer to prevent chemical denaturation of the core to maintain semiconductor properties, and / or can be used as a charging layer to impart electrophoretic properties to the quantum dot. The shell can be monolayer or multilayer. The interface between the core and the shell can have a concentration gradient in which the concentration of the material in the shell decreases toward the core.

[0340] Examples of materials forming the shell of quantum dots may include: metal oxides; metalloid oxides or non-metal oxides; semiconductor compounds; or any combination thereof. Examples of metal oxides, metalloid oxides, or non-metal oxides may include: binary compounds such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 and NiO, etc.; ternary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and CoMn 2 O 4 etc.; or any combination thereof. Examples of semiconductor compounds as used herein may include: II-VI semiconductor compounds; III-V semiconductor compounds; III-VI semiconductor compounds; I-III-VI semiconductor compounds; IV-VI semiconductor compounds; or any combination thereof. Examples of semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

[0341] The full width at half maximum (FWHM) of the emission wavelength spectrum of the quantum dot can be less than or equal to about 45nm. For example, the FWHM of the emission wavelength spectrum of the quantum dot can be less than or equal to about 40nm. For example, the FWHM of the emission wavelength spectrum of the quantum dot can be less than or equal to about 30nm. Within these ranges, the color purity or color reproducibility of the quantum dot can be improved. The light emitted by the quantum dot can be emitted in all directions, so that the wide viewing angle can be improved.

[0342] In embodiments, the quantum dots may be in the form of spherical nanoparticles, pyramidal nanoparticles, multi-arm nanoparticles, cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplates, or the like.

[0343] By controlling the size of the quantum dots, the band gap can be adjusted so that light with various wavelength bands can be obtained from the quantum dots comprising the emission layer. Therefore, by using quantum dots of different sizes, a light emitting device that emits light of various wavelengths can be realized. In an embodiment, the size of the quantum dots can be selected to emit red light, green light, and / or blue light. The size of the quantum dots can be configured to emit white light by combining light of various colors.

[0344] [Electron Transport Regions 160 - 1 and 160 - 2 in Organic Layer 150 ]

[0345] The electron transport regions 160 - 1 and 160 - 2 may have a structure composed of a layer composed of a single material, a structure composed of layers including different materials, or a structure having a plurality of layers including different materials.

[0346] The electron transport regions 160 - 1 and 160 - 2 may each independently include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0347] In an embodiment, the electron transport regions 160-1 and 160-2 may each independently have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure or a buffer layer / electron transport layer / electron injection layer structure, wherein the layers of each structure may be stacked from the emission layer 152-2 or 152-1 in their respective stated order, but the structures of the electron transport regions 160-1 and 160-2 are not limited thereto.

[0348] In an embodiment, the electron transport regions 160-1 and 160-2 (e.g., the buffer layer, the hole blocking layer, the electron control layer, or the electron transport layer in the electron transport regions 160-1 and 160-2) may each independently include a metal-free compound including at least one π-electron-deficient nitrogen-containing C 1 -C 60 Cyclic base.

[0349] In an embodiment, electron transport regions 160 - 1 and 160 - 2 may each independently include a compound represented by Formula 601:

[0350] [Formula 601]

[0351] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21 .

[0352] In formula 601,

[0353] Ar 601 and L 601 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0354] xe11 can be 1, 2 or 3,

[0355] xe1 can be 0, 1, 2, 3, 4, or 5,

[0356] R 601 may be unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 601 )(Q 602 )(Q 603 )、-C(=O)(Q 601 )、-S(=O) 2 (Q 601 ) or -P(=O)(Q 601 )(Q 602 ),

[0357] Q 601 To Q 603 can be independently compared with 1 Same as described,

[0358] xe21 can be 1, 2, 3, 4, or 5, and

[0359] Ar 601 , L 601 and R 601 At least one of them may be independently unsubstituted or substituted by at least one R 10a Substituted π-electron-deficient nitrogen-containing C 1 -C 60 Cyclic base.

[0360] In the embodiment, in Formula 601, when xe11 is 2 or greater, two or more Ar 601 can be connected to each other via a single bond.

[0361] In the embodiment, in Formula 601, Ar601 may be unsubstituted or substituted with at least one R 10a Substituted anthracenyl.

[0362] In an embodiment, the electron transport regions 160-1 and 160-2 may each independently include a compound represented by Formula 601-1:

[0363] [Formula 601-1]

[0364]

[0365] In formula 601-1,

[0366] X 614 Can be N or C (R 614 ), X 615 Can be N or C (R 615 ), X 616 Can be N or C (R 616 ), and X 614 To X 616 At least one of them can be N,

[0367] L 611 To L 613 can be independently related to L 601 Same as described,

[0368] xe611 to xe613 can each independently be the same as described for xe1,

[0369] R 611 To R 613 can be independently compared with R 601 Same as described, and

[0370] R 614 To R 616 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 20 Alkyl, C 1 -C 20 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group.

[0371] In an embodiment, in Formula 601 and Formula 601-1, xe1 and xe611 to xe613 may each independently be 0, 1, or 2.

[0372] In an embodiment, the electron transport regions 160-1 and 160-2 may each independently include: one of the compounds ET1 to ET45; 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP); 4,7-diphenyl-1,10-phenanthroline (Bphen); Alq 3 ; BAlq; TAZ; NTAZ; or any combination thereof:

[0373]

[0374]

[0375]

[0376] The thickness of the electron transport regions 160-1 and 160-2 may be independently about To about For example, the thickness of the electron transport regions 160-1 and 160-2 may be independently about To about When the electron transport region 160-1 or 160-2 includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or any combination thereof, the thickness of the buffer layer, the hole blocking layer, or the electron control layer may be independently about To about and the thickness of the electron transport layer can be in the range of about To about For example, the thickness of the buffer layer, the hole blocking layer, or the electron control layer can be independently about To about For example, the thickness of the electron transport layer can be about To about When the thickness of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer and / or the electron transport regions 160-1 and 160-2 is within these ranges, satisfactory electron transport characteristics may be obtained without significantly increasing the driving voltage.

[0377] In addition to the aforementioned materials, the electron transport regions 160 - 1 and 160 - 2 (eg, an electron transport layer in the electron transport region 160 - 1 or 160 - 2 ) may further include a metal-containing material.

[0378] The metal-containing material can include alkali metal complex, alkaline earth metal complex or any combination thereof. The metal ion of the alkali metal complex can be Li ion, Na ion, K ion, Rb ion or Cs ion, and the metal ion of the alkaline earth metal complex can be Be ion, Mg ion, Ca ion, Sr ion or Ba ion. The ligand coordinated with the metal ion of the alkali metal complex or alkaline earth metal complex can include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene or any combination thereof.

[0379] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, compound ET-D1 (Liq) or compound ET-D2:

[0380]

[0381] The electron transport regions 160-1 and 160-2 may each independently include an electron injection layer that facilitates injection of electrons from the second electrode 190. The electron injection layer may contact (eg, directly contact) the second electrode 190.

[0382] The electron injection layer may have a structure composed of a layer composed of a single material, a structure composed of layers including different materials, or a structure having a plurality of layers including different materials.

[0383] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0384] Alkali metals may include Li, Na, K, Rb, Cs or any combination thereof. Alkaline earth metals may include Mg, Ca, Sr, Ba or any combination thereof. Rare earth metals may include Sc, Y, Ce, Tb, Yb, Gd or any combination thereof.

[0385] The alkali metal-containing compound, the alkaline earth metal-containing compound and the rare earth metal-containing compound may be oxides, halides (eg, fluorides, chlorides, bromides, iodides, etc.) or tellurides of alkali metals, alkaline earth metals and rare earth metals, or any combination thereof.

[0386] Alkali metal-containing compounds may include: alkali metal oxides, such as Li 2 O、Cs 2 O and K 2O, etc.; alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI and KI, etc.; or any combination thereof. The alkaline earth metal-containing compound may include alkaline earth metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying 0<x<1) and Ba x Ca 1-x O (wherein x is a real number satisfying 0<x<1), etc. The rare earth metal-containing compound may include YbF 3 ScF 3 Sc 2 O 3 , Y 2 O 3 、Ce 2 O 3 , GdF 3 , TbF 3 ,YbI 3 ScI 3 , TbI 3 Or any combination thereof. In an embodiment, the rare earth metal-containing compound may include a lanthanide metal telluride. Examples of lanthanide metal tellurides may include LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, LaTe, 2 Te 3 、Ce 2 Te 3 , Pr 2 Te 3 、Nd 2 Te 3 、Pm 2 Te 3 、Sm 2 Te 3 、Eu 2 Te 3 , Gd 2 Te 3 , Tb 2 Te 3 、Dy 2 Te 3 、Ho 2 Te 3 , Er 2 Te 3 、Tm 2 Te 3 , Yb 2 Te 3 He Lu 2 Te 3 wait.

[0387] The alkali metal complexes, alkaline earth metal complexes and rare earth metal complexes may include alkali metal ions, alkaline earth metal ions and rare earth metal ions and a ligand bonded to the metal ion (e.g., hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof).

[0388] In an embodiment, the electron injection layer may be composed of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof as described above. In an embodiment, the electron injection layer may also include an organic material (e.g., a compound represented by Formula 601).

[0389] In an embodiment, the electron injection layer may be composed of an alkali metal-containing compound (e.g., an alkali metal halide); or the electron injection layer may be composed of an alkali metal-containing compound (e.g., an alkali metal halide) and an alkali metal, an alkaline earth metal, a rare earth metal, or any combination thereof. For example, the electron injection layer may be a KI:Yb co-deposition layer or a RbI:Yb co-deposition layer, etc.

[0390] When the electron injection layer also includes organic materials, alkali metals, alkaline earth metals, rare earth metals, alkali metal-containing compounds, alkaline earth metal-containing compounds, rare earth metal-containing compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes or any combination thereof can be uniformly or non-uniformly dispersed in the matrix including the organic material.

[0391] The thickness of the electron injection layer can be about To about For example, the thickness of the electron injection layer can be about To about When the thickness of the electron injection layer is within these ranges, satisfactory electron injection characteristics can be obtained without significantly increasing the driving voltage.

[0392] [Second electrode 190]

[0393] The second electrode 190 may be disposed on the aforementioned second electron transport region 160-2. The second electrode 190 may be a cathode as an electron injection electrode. The second electrode 190 may include a material having a low work function, such as a metal, an alloy, a conductive compound, or any combination thereof.

[0394] The second electrode 190 may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ytterbium (Yb), silver-ytterbium (Ag-Yb), ITO, IZO or any combination thereof. The second electrode 190 may be a transmissive electrode, a semi-transmissive electrode or a reflective electrode.

[0395] The second electrode 190 may have a single-layer structure or a multi-layer structure.

[0396] [Capping layer]

[0397] The light-emitting device 20 may include a first capping layer outside the first electrode 110 and / or a second capping layer outside the second electrode 190. For example, the light-emitting device 20 may have a structure in which the first capping layer, the first electrode 110, the organic layer 150, and the second electrode 190 may be stacked in the order stated, a structure in which the first electrode 110, the organic layer 150, the second electrode 190 and the second capping layer may be stacked in the order stated, or a structure in which the first capping layer, the first electrode 110, the organic layer 150, the second electrode 190 and the second capping layer may be stacked in the order stated.

[0398] Light generated in the emission layer 152-1 or 152-2 of the organic layer 150 of the light-emitting device 20 may pass through the first electrode 110 (the first electrode 110 may be a semi-transmissive electrode or a transmissive electrode) and pass through the first capping layer to be emitted toward the outside. Light generated in the emission layer 152-1 or 152-2 of the organic layer 150 of the light-emitting device 20 may pass through the second electrode 190 (the second electrode 190 may be a semi-transmissive electrode or a transmissive electrode) and pass through the second capping layer to be emitted toward the outside.

[0399] According to the principle of constructive interference, the first capping layer and the second capping layer can each improve the external emission efficiency. Therefore, the light emission efficiency of the light emitting device 20 can be improved, and thus the light emitting efficiency of the light emitting device 20 can be improved.

[0400] The first capping layer and the second capping layer may each include a material having a refractive index greater than or equal to about 1.6 (with respect to a wavelength of about 589 nm).

[0401] The first capping layer and the second capping layer may each independently be an organic capping layer including an organic material, an inorganic capping layer including an inorganic material, or an organic-inorganic composite capping layer including an organic material and an inorganic material.

[0402] At least one of the first capping layer and the second capping layer may each independently include a carbocyclic compound, a heterocyclic compound, an amine-containing compound, a porphine derivative, a phthalocyanine derivative, a naphthalocyanine derivative, an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The carbocyclic compound, the heterocyclic compound, and the amine-containing compound may be optionally substituted with a substituent including O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof.

[0403] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include an amine-containing compound.

[0404] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof.

[0405] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include one of compounds HT28 to HT33, one of compounds CP1 to CP6, β-NPB, or any combination thereof:

[0406]

[0407] [ Figure 2A Description]

[0408] Figure 2A is a schematic cross-sectional view of a light emitting device 20 according to the embodiment. Figure 2A The light emitting device 20 shown in FIG. 1 shows an embodiment in which m is 2, but the embodiment is not limited thereto. Figure 1 compared to, Figure 2A The components may have the same or similar functions, and thus their description will be omitted.

[0409] exist Figure 2A In the embodiment, the 3-2 emission layer 152c-2 may be disposed on the third sub-pixel SP3 of the second emission unit 150-2.

[0410] [ Figure 2B Description]

[0411] Figure 2B is a schematic cross-sectional view of a light emitting device 20 according to the embodiment. Figure 2B The light emitting device 20 shown in FIG. 1 shows an embodiment in which m is 2, but the embodiment is not limited thereto. Figure 1 compared to, Figure 2B The components may have the same or similar functions, and thus their description will be omitted.

[0412] exist Figure 2BIn the embodiment, the 3-1 emission layer 152c-1 may be disposed on the third sub-pixel SP3 of the first emission unit 150-1.

[0413] [Electronic equipment]

[0414] Light emitting device (e.g. Figure 1 The light emitting device 20 in the embodiment may be included in various electronic devices. For example, the electronic device including the light emitting device may be a light emitting device or an authentication device.

[0415] An electronic device (e.g., a light emitting device) may further include a color filter, a color conversion layer, or a color filter and a color conversion layer in addition to the light emitting device. The color filter and / or the color conversion layer may be arranged in at least one direction of travel of the light emitted from the light emitting device. In an embodiment, the light emitted from the light emitting device may be blue light or white light. The details about the light emitting device may be the same as described herein. In an embodiment, the color conversion layer may include quantum dots. The quantum dots may be, for example, the quantum dots mentioned above.

[0416] The electronic device may include a first substrate. The first substrate may include a plurality of sub-pixels, the color filter may include a plurality of color filter regions respectively corresponding to the plurality of sub-pixels, and the color conversion layer may include a plurality of color conversion regions respectively corresponding to the plurality of sub-pixels.

[0417] A pixel defining layer may be disposed between the plurality of sub-pixels to define each sub-pixel.

[0418] The color filter may further include a plurality of color filter regions and a light shielding pattern disposed between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light shielding pattern disposed between the plurality of color conversion regions.

[0419] The plurality of color filter regions (or color conversion regions) may include a first region emitting a first color light, a second region emitting a second color light, and / or a third region emitting a third color light, wherein the first color light, the second color light, and / or the third color light may have different maximum emission wavelengths from each other. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. For example, the plurality of color filter regions (or color conversion regions) may include quantum dots. For example, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include quantum dots. The quantum dots may be the same as described herein. The first region, the second region, and / or the third region may each further include a scatterer.

[0420] For example, in a light emitting device that can emit a first color light, the first region can absorb the first color light to emit a first-1 color light, the second region can absorb the first color light to emit a second-1 color light, and the third region can absorb the first color light to emit a third-1 color light. Here, the first-1 color light, the second-1 color light, and the third-1 color light can each have a maximum emission wavelength different from each other. For example, the first color light can be blue light, the first-1 color light can be red light, the second-1 color light can be green light, and the third-1 color light can be blue light.

[0421] The electronic device may further include a thin film transistor in addition to the light emitting device described above. The thin film transistor may include a source electrode, a drain electrode and an active layer, wherein any one of the source electrode and the drain electrode may be electrically connected to any one of the first electrode and the second electrode of the light emitting device.

[0422] The thin film transistor may further include a gate electrode, a gate insulating film, and the like.

[0423] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, and the like.

[0424] The electronic device may further include a sealing portion for sealing the light emitting device. The sealing portion may be arranged between the color filter and / or the color conversion layer and the light emitting device. The sealing portion allows light from the light emitting device to be emitted to the outside, and may prevent ambient air and moisture from penetrating into the light emitting device. The sealing portion may be a sealing substrate including a transparent glass substrate or a plastic substrate. The sealing portion may be a thin film encapsulation layer including an organic layer and / or an inorganic layer. When the sealing portion is a thin film encapsulation layer, the electronic device may be flexible.

[0425] Depending on the purpose of the electronic device, in addition to the color filter and / or the color conversion layer, various functional layers may be included on the sealing portion. Examples of the functional layer may include a touch screen layer and a polarization layer, etc. The touch screen layer may be a pressure-sensitive touch screen layer, a capacitive touch screen layer, or an infrared touch screen layer. The authentication device may be, for example, a biometric authentication device that authenticates an individual by using biometric information of a living body (e.g., a fingertip, a pupil, etc.).

[0426] The authentication device may include a biometric information collector in addition to the light emitting device as described above.

[0427] The electronic device can be applied to various displays, light sources, lighting equipment, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notepads, electronic dictionaries, electronic game consoles, medical instruments (e.g., electronic thermometers, blood pressure meters, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram displays, ultrasonic diagnostic devices or endoscope displays), fish finders, various measuring instruments, meters (e.g., meters for vehicles, aircraft and ships) and projectors, etc.

[0428] [ Figure 3 and Figure 4 Description]

[0429] Figure 3 is a schematic cross-sectional view showing an electronic device according to the embodiment.

[0430] Figure 3 The electronic device (eg, a light emitting device) includes a substrate 100, a thin film transistor (TFT), a light emitting device (eg, Figure 1 A light emitting device 20) and a packaging portion 300 that seals the light emitting device.

[0431] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. The buffer layer 210 may be disposed on the substrate 100. The buffer layer 210 may prevent impurities from penetrating through the substrate 100, and may provide a flat surface on the substrate 100.

[0432] The TFT may be disposed on the buffer layer 210. The TFT may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0433] The active layer 220 may include an inorganic semiconductor such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and may include a source region, a drain region, and a channel region.

[0434] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be disposed on the active layer 220 , and the gate electrode 240 may be disposed on the gate insulating film 230 .

[0435] An interlayer insulating film 250 may be disposed on the gate electrode 240 . The interlayer insulating film 250 may be disposed between the gate electrode 240 and the source electrode 260 to insulate the gate electrode 240 from the source electrode 260 and between the gate electrode 240 and the drain electrode 270 to insulate the gate electrode 240 from the drain electrode 270 .

[0436] The source electrode 260 and the drain electrode 270 may be disposed on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source region and the drain region of the active layer 220, and the source electrode 260 and the drain electrode 270 may contact the exposed portions of the source region and the drain region of the active layer 220, respectively.

[0437] The TFT may be electrically connected to the light emitting device to drive the light emitting device, and may be covered and protected by the passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or any combination thereof. The light emitting device may be provided on the passivation layer 280. The light emitting device may include a first electrode 110, an organic layer 150, and a second electrode 190.

[0438] The first electrode 110 may be disposed on the passivation layer 280. The passivation layer 280 may be disposed to expose a portion of the drain electrode 270 and may not fully cover the drain electrode 270. The first electrode 110 may be electrically connected to the exposed portion of the drain electrode 270.

[0439] A pixel defining layer 290 including an insulating material may be disposed on the first electrode 110. The pixel defining layer 290 may expose a region of the first electrode 110, and the organic layer 150 may be formed in the exposed region of the first electrode 110. The pixel defining layer 290 may be a polyimide-based organic film or a polyacrylic organic film. Figure 3 and Figure 4 Although not shown in the drawings, at least some layers of the organic layer 150 may extend beyond an upper portion of the pixel defining layer 290 and may be provided in the form of a common layer.

[0440] The second electrode 190 may be disposed on the organic layer 150, and may further include a capping layer 195 on the second electrode 190. The capping layer 195 may be formed to cover the second electrode 190.

[0441] The encapsulation part 300 may be disposed on the capping layer 195. The encapsulation part 300 may be disposed on the light emitting device to protect the light emitting device from moisture or oxygen. The encapsulation part 300 may include an inorganic film including silicon nitride (SiN x ), silicon oxide (SiO x ), indium tin oxide, indium zinc oxide or any combination thereof; organic films comprising polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resins (e.g., polymethyl methacrylate or polyacrylic acid, etc.), epoxy resins (e.g., aliphatic glycidyl ether (AGE), etc.) or any combination thereof; or any combination of inorganic films and organic films.

[0442] Figure 4 is a schematic cross-sectional view showing an electronic device according to another embodiment.

[0443] Figure 4 An electronic device (eg, a light emitting device) and Figure 3 The difference of the electronic device may be at least that a light shielding pattern 500 and a functional area 400 are further included on the packaging portion 300. The functional area 400 may include a color filter area, a color conversion area, or a combination of a color filter area and a color conversion area. Figure 4 The light-emitting device in the electronic device may be a series light-emitting device.

[0444] [Manufacturing method]

[0445] Hole transport regions 140-1 and 140-2 (see Figure 1 ) of the constituent layers, the emission layers 152-1 and 152-2 (see Figure 1 ) and electron transport regions 160-1 and 160-2 (see Figure 1 ) can each be formed in a region by using various methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, or laser induced thermal imaging (LITI).

[0446] When forming the constituent layers of the hole transport regions 140-1 and 140-2, the emission layers 152-1 and 152-2, and the constituent layers of the electron transport regions 160-1 and 160-2 by vacuum deposition, the deposition conditions may be selected to include, for example, a deposition temperature in the range of about 100° C. to about 500° C. ... -8 Up to about 10 -3 The vacuum degree is within the range of 10 torr and about To about The deposition rate is within the range of .

[0447] [ Figure 5 and Figure 6 Description]

[0448] Figure 5 and Figure 6 Each shows a spectrum for determining whether there is color mixing according to brightness. Figure 5 and Figure 6 In , A, B, C, and D each represent a tandem light-emitting device using the blue common emission layer disclosed herein, and Ref 1 and Ref 2 each represent a light-emitting device consisting of a single stack corresponding to Comparative Example 3 to be described below. Figure 5 and Figure 6, confirming that light-emitting devices using the blue common emission layer disclosed in this article do not exhibit color mixing in the spectrum.

[0449] [Definition of terms]

[0450] As used herein, the term "C 3 -C 60 The term "carbocyclic group" may be a cyclic group consisting of a carbon atom as the only ring-forming atom and having 3 to 60 carbon atoms, and as used herein, 1 -C 60 The "heterocyclic group" may be a cyclic group having 1 to 60 carbon atoms and having at least one heteroatom as a ring-constituting atom in addition to the carbon atoms. 3 -C 60 Carbocyclic and C 1 -C 60 The heterocyclic groups may each be a monocyclic group consisting of one ring or a polycyclic group in which two or more rings are fused to each other. 1 -C 60 The number of ring-forming atoms of the heterocyclic group may be from 3 to 61.

[0451] As used herein, the term "cyclic group" may be C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group.

[0452] As used herein, the term "π-electron-rich C 3 -C 60 The "cyclic group" may be a cyclic group having 3 to 60 carbon atoms and may not include *-N=*' as a ring-forming part, and the term "π-electron-deficient nitrogen-containing C 1 -C 60 The "cyclic group" may be a heterocyclic group having 1 to 60 carbon atoms and may include *-N=*' as a ring-forming part.

[0453] In an embodiment,

[0454] C 3 -C 60 The carbocyclic group may be a T1 group or a group in which two or more T1 groups are fused to each other (e.g., cyclopentadienyl, adamantyl, norbornyl, phenyl, pentalenyl, naphthyl, azulenyl, indacenyl, acenaphthenyl, phenanthrenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylene, pyrene, phenyl, fluorenyl, spiro-bifluorenyl, benzofluorenyl, indenophenanthryl or indenoanthryl),

[0455] C 1 -C 60 The heterocyclic group may be a T2 group, a group in which at least two T2 groups are fused to each other, or a group in which at least one T2 group and at least one T1 group are fused to each other (e.g., pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthoindolyl, isoindolyl, benzisoindolyl, naphthoisoindolyl, benzothioyl, benzothiophenyl, benzofuranyl, carbazolyl, dibenzothioyl, dibenzothiophenyl, dibenzofuranyl, indenocarbazolyl, indolecarbazolyl, benzofuranocarbazolyl, benzothiophenecarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzoindolcarbazolyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, benzonaphthothiophenyl, benzonaphthothiophenyl, benzofuranodibenzofuranyl, benzofuranodibenzothiophenyl yl, benzothiophene and dibenzothiophene, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinoline yl, benzoisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazoline, benzoquinazolinyl, phenanthroline, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridinyl, imidazopyrimidinyl, imidazotriazine, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafluorenyl, azadibenzothiazolyl, azadibenzothiopheneyl or azadibenzofuranyl, etc.),

[0456] Pi-electron-rich C 3 -C 60 The cyclic group may be a T1 group, a group in which two or more T1 groups are fused to each other, a T3 group, a group in which two or more T3 groups are fused to each other, or a group in which at least one T3 group and at least one T1 group are fused to each other (e.g., C 3 -C 60 carbocyclic group, 1H-pyrrolyl, thiolyl, borocyclopentadienyl, 2H-pyrrolyl, 3H-pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthoindolyl, isoindolyl, benzisoindolyl, naphthoisoindolyl, benzothiolyl, benzothiophenyl, benzofuranyl, carbazolyl, dibenzothiolyl, dibenzothiophenyl, dibenzofuranyl, indenocarbazolyl, indolecarbazolyl, benzofuranocarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzoindolcarbazolyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothienyl, benzonaphthothiolyl, benzofuranodibenzofuranyl, benzofuranodibenzothiophenyl or benzothiophenyldibenzothiophenyl, etc.),

[0457] π-electron-deficient nitrogen-containing C 1 -C 60 The cyclic group may be a T4 group, a group in which at least two T4 groups are fused to each other, a group in which at least one T4 group and at least one T1 group are fused to each other, a group in which at least one T4 group and at least one T3 group are fused to each other, or a group in which at least one T4 group, at least one T1 group and at least one T3 group are fused to each other (e.g., pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, yl, benzoisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, benzoisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, phenanthrolinyl, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridinyl, imidazopyrimidinyl, imidazotriazine, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafluorenyl, azadibenzothiolsyl, azadibenzothiophenyl and azadibenzofuranyl).

[0458] The T1 group can be cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, adamantyl, norbornane (or bicyclo[2.2.1]heptane) group, norbornenyl, bicyclo[1.1.1]pentanyl, bicyclo[2.1.1]hexanyl, bicyclo[2.2.2]octane or phenyl.

[0459] The T2 group can be furanyl, thienyl, 1H-pyrrolyl, thiolyl, borocyclopentyl, 2H-pyrrolyl, 3H-pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, azathiarolyl, azaborolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, tetraazinyl, pyrrolidinyl, imidazolidinyl, dihydropyrrolyl, piperidinyl, tetrahydropyridinyl, dihydropyridinyl, hexahydropyrimidinyl, tetrahydropyrimidinyl, dihydropyrimidinyl, piperazinyl, tetrahydropyrazinyl, dihydropyrazinyl, tetrahydropyridazinyl or dihydropyridazinyl.

[0460] The T3 group may be furanyl, thienyl, 1H-pyrrolyl, thiolyl or borocyclopentadienyl.

[0461] The T4 group can be 2H-pyrrolyl, 3H-pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, azathiole, azaborolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl or tetrazinyl.

[0462] As used herein, the terms "cyclic group", "C 3 -C 60 Carbocyclic group, "C 1 -C 60 Heterocyclic group", "π-electron-rich C 3 -C 60 Cyclic group" or "π-electron-deficient nitrogen-containing C 1 -C 60 The "cyclic group" may each be a group condensed with any cyclic group, a monovalent group or a polyvalent group (e.g., a divalent group, a trivalent group, a tetravalent group, etc.) according to the structure of the formula using the corresponding term. In an embodiment, the "phenyl group" may be a benzo group, a phenyl group or a phenylene group, etc., which can be easily understood by a person of ordinary skill in the art based on the structure of the formula including the "phenyl group".

[0463] One Price C 3 -C 60 Carbocyclic or monovalent C 1 -C 60 Examples of heterocyclic groups may include C 3 -C 10 Cycloalkyl, C 1 -C 10 Heterocycloalkyl, C 3 -C 10 Cycloalkenyl, C 1 -C 10 Heterocycloalkenyl, C 6 -C 60 Aryl, C 1 -C 60 heteroaryl, monovalent non-aromatic fused polycyclic group and monovalent non-aromatic fused heteropolycyclic group. 3 -C 60 Carbocyclic or divalent C 1 -C 60 Examples of heterocyclic groups may include C 3 -C 10 Cycloalkylene, C 1 -C 10 Heterocycloalkylene, C 3 -C 10 Cycloalkenylene, C 1 -C 10 Heterocycloalkenylene, C 6 -C 60 Arylene, C 1 -C 60 a heteroarylene group, a divalent non-aromatic fused polycyclic group, and a divalent non-aromatic fused heteropolycyclic group.

[0464] As used herein, the term "C 1 -C60 The "alkyl" may be a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and the "C 1 -C 60 Examples of the “alkyl” group may include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl, and tert-decyl. As used herein, the term “alkyl” may include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl, and tert-decyl. 1 -C 60 The "alkylene" may be 1 -C 60 An alkyl group is a divalent group having the same structure.

[0465] As used herein, the term "C 2 -C 60 The "alkenyl" may be 2 -C 60 A monovalent hydrocarbon group having at least one carbon-carbon double bond in the middle or at the end of the alkyl group, and "C 2 -C 60 Examples of "alkenyl" may include ethenyl, propenyl, butenyl, and the like. As used herein, the term "C 2 -C 60 The "alkenylene" may be 2 -C 60 An alkenyl group is a divalent group having the same structure.

[0466] As used herein, the term "C 2 -C 60 The "alkynyl" may be 2 -C 60 A monovalent hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the end of the alkyl group, and "C 2 -C 60 Examples of "alkynyl" may include ethynyl and propynyl, etc. As used herein, the term "C 2 -C 60 The "alkynylene group" can be 2 -C 60 Alkynyl is a divalent group having the same structure.

[0467] As used herein, the term "C 1 -C 60 The "alkoxy" may be -O(A 101 ) represented by a monovalent group (wherein A 101 Can be C 1 -C60 alkyl), and "C 1 -C 60 Examples of the "alkoxy group" may include methoxy, ethoxy, isopropoxy, and the like.

[0468] As used herein, the term "C 3 -C 10 The "cycloalkyl" may be a monovalent saturated hydrocarbon ring group having 3 to 10 carbon atoms, and the "C 3 -C 10 Examples of "cycloalkyl" may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornyl (or bicyclo[2.2.1]heptyl), bicyclo[1.1.1]pentanyl, bicyclo[2.1.1]hexanyl, and bicyclo[2.2.2]octanyl, etc. As used herein, the term "C 3 -C 10 The cycloalkylene group may be 3 -C 10 The cycloalkyl group is a divalent group having the same structure.

[0469] As used herein, the term "C 1 -C 10 The "heterocycloalkyl group" may be a monovalent cyclic group of 1 to 10 carbon atoms which includes at least one heteroatom as a ring-forming atom in addition to carbon atoms, and the "C 1 -C 10 Examples of "heterocycloalkyl" may include 1,2,3,4-oxatriazolidinyl, tetrahydrofuranyl, tetrahydrothienyl, and the like. As used herein, the term "C 1 -C 10 The "heterocycloalkylene" may be 1 -C 10 The heterocycloalkyl group has a divalent group of the same structure.

[0470] As used herein, the term "C 3 -C 10 The "cycloalkenyl group" may be a monovalent cyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and having no aromaticity, and the "C 3 -C 10 Examples of "cycloalkenyl" may include cyclopentenyl, cyclohexenyl, cycloheptenyl, and the like. As used herein, the term "cycloalkenyl" may include cyclopentenyl, cyclohexenyl, cycloheptenyl, and the like. 3 -C 10 The cycloalkenylene group can be 3 -C 10 The cycloalkenyl group is a divalent group having the same structure.

[0471] As used herein, the term "C 1 -C 10The "heterocycloalkenyl group" may be a monovalent cyclic group of 1 to 10 carbon atoms which includes at least one heteroatom as a ring-forming atom in addition to carbon atoms and has at least one double bond in its cyclic structure. 1 -C 10 Examples of heterocycloalkenyl groups may include 4,5-dihydro-1,2,3,4-oxatriazolyl, 2,3-dihydrofuranyl, 2,3-dihydrothienyl, and the like. As used herein, the term “C 1 -C 10 The "heterocycloalkenylene" may be 1 -C 10 The heterocycloalkenyl group is a divalent group having the same structure.

[0472] As used herein, the term "C 6 -C 60 The term "aryl" may be a monovalent group of a carbocyclic aromatic system having 6 to 60 carbon atoms, and as used herein, the term "C 6 -C 60 The "arylene group" may be a divalent group of a carbocyclic aromatic system having 6 to 60 carbon atoms. 6 -C 60 Examples of the aryl group may include phenyl, pentalenyl, naphthyl, azulenyl, indacenyl, acenaphthenyl, phenanthrenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylene, pyrenyl, phenyl, peryl, pentaphenyl, heptaphenyl, tetraphenyl, peryl, hexaphenyl, pentyl, rubidinyl, coryl and ovaphenyl. 6 -C 60 Aryl and C 6 -C 60 When the arylene groups each include two or more rings, the respective rings may be fused to each other.

[0473] As used herein, the term "C 1 -C 60 The term "heteroaryl" as used herein may be a monovalent group of a heterocyclic aromatic system having 1 to 60 carbon atoms and including at least one heteroatom as a ring-forming atom in addition to carbon atoms. 1 -C 60 The "heteroarylene group" may be a divalent group of a heterocyclic aromatic system having 1 to 60 carbon atoms and including at least one heteroatom as a ring-forming atom in addition to carbon atoms. 1 -C 60 Examples of heteroaryl groups may include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, benzoquinolyl, isoquinolyl, benzoisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, cinnolinyl, phenanthrolinyl, phthalazinyl, and naphthyridinyl. 1 -C60 Heteroaryl and C 1 -C 60 When the heteroarylene groups each include two or more rings, the respective rings may be fused to each other.

[0474] The term "monovalent non-aromatic fused polycyclic group" as used in this article can be a monovalent group (e.g., having 8 to 60 carbon atoms) having two or more rings fused to each other, only carbon atoms as ring atoms, and no aromaticity in its entire molecular structure. Examples of monovalent non-aromatic fused polycyclic groups can include indenyl, fluorenyl, spiro-bifluorenyl, benzofluorenyl, indenophenanthryl and indenoanthryl, etc. The term "divalent non-aromatic fused polycyclic group" as used in this article can be a divalent group having the same structure as the monovalent non-aromatic fused polycyclic group described above.

[0475] The term “monovalent non-aromatic fused heteropolycyclic group” as used herein may be a monovalent group (for example, having 1 to 60 carbon atoms) having two or more rings fused to each other which includes at least one heteroatom as a ring-constituting atom in addition to carbon atoms and has no aromaticity in its entire molecular structure. Examples of the monovalent non-aromatic condensed heteropolycyclic group may include a pyrrolyl group, a thienyl group, a furyl group, an indolyl group, a benzindolyl group, a naphthoindolyl group, an isoindolyl group, a benzisoindolyl group, a naphthoisoindolyl group, a benzothioyl group, a benzofuranyl group, a carbazolyl group, a dibenzothioyl group, a dibenzothioyl group, a dibenzofuranyl group, an azacarbazolyl group, an azafluorenyl group, an azadibenzothioyl group, an azadibenzothioyl group, an azadibenzofuranyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, a thiazolyl group, an isothiazolyl group, an oxadiazolyl group, a thiadiazole group, and a thiadiazole group. The term "divalent non-aromatic condensed heteropolycyclic group" as used herein may be a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group described above.

[0476] As used herein, the term "C 6 -C 60 The "aryloxy" may be -O(A 102 ) represented by a group (wherein A 102 Can be C 6 -C 60aryl), and as used herein, the term "C 6 -C 60 The "arylthio" group can be -S(A 103 ) represented by a group (wherein A 103 Can be C 6 -C 60 aryl).

[0477] As used herein, the term "C 7 -C 60 "Arylalkyl" refers to -(A 104 )(A 105 )(Among them, A 104 Can be C 1 -C 54 Alkylene, and A 105 Can be C 6 -C 59 aryl), and as used herein, the term "C 2 -C 60 "Heteroaralkyl" may be -(A 106 )(A 107 )(Among them, A 106 Can be C 1 -C 59 Alkylene, and A 107 Can be C 1 -C 59 heteroaryl).

[0478] In the specification, the group term "R 10a ” can be:

[0479] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0480] C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C2 -C 60 Heteroaralkyl, -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 any combination thereof;

[0481] C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 heteroarylalkyl, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -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 any combination thereof; or

[0482] -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 ).

[0483] In the manual, Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C 1 -C 60 Alkyl; C 2 -C 60 Alkenyl; C 2 -C 60 Alkynyl; C 1 -C 60 alkoxy; each unsubstituted or substituted by deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or any combination thereof substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl.

[0484] The term "heteroatom" as used herein may be any atom other than a carbon atom and a hydrogen atom. Examples of heteroatoms may include O, S, N, P, Si, B, Ge, Se, and any combination thereof.

[0485] The term “third row transition metal” as used herein may include Hf, Ta, W, Re, Os, Ir, Pt, Au, and the like.

[0486] In the specification, the term "Ph" refers to a phenyl group, the term "Me" refers to a methyl group, the term "Et" refers to an ethyl group, the term "tert-Bu" or "But" each refers to a tert-butyl group, and the term "OMe" refers to a methoxy group.

[0487] The term "biphenyl" as used herein may be a "phenyl group substituted with a phenyl group". For example, a "biphenyl group" may be a group having C 6 -C 60 A substituted phenyl group having an aryl group as a substituent.

[0488] The term "terphenyl" as used herein may be a "phenyl group substituted with a biphenyl group". For example, a "terphenyl group" may be a phenyl group substituted with a C 6 -C 60 Aryl substituted C 6 -C 60 A substituted phenyl group having an aryl group as a substituent.

[0489] Unless otherwise defined, the symbols * and *' as used herein each refer to a binding site to an adjacent atom in the corresponding formula or moiety.

[0490] Hereinafter, the compound according to the embodiment and the light emitting device according to the embodiment will be described in detail with reference to the following synthesis examples and examples. The phrase "using B instead of A" used in describing the synthesis examples means using B instead of A in the same molar equivalent number.

[0491] [Synthesis examples and examples]

[0492] Example 1

[0493] 15Ω / cm 2 ITO / Ag / ITO A glass substrate (manufactured by Corning Incorporated) was cut into a size of 50 mm×50 mm×0.7 mm, sonicated with isopropyl alcohol and pure water for 5 minutes each, cleaned by ultraviolet (UV) irradiation and exposure to ozone for 15 minutes, and mounted in a vacuum evaporation apparatus.

[0494] HT3 and F4-TCNQ were co-deposited on a glass substrate (including an ITO / Ag / ITO anode) at a weight ratio of 98:2 to form a A first hole injection layer having a thickness of The first hole transport layer has a thickness of .

[0495] In the red sub-pixel, RH as the red host and PD9 (Ir(piq)) as the red dopant are used. 2 (acac)) are co-deposited on the first hole transport layer in a weight ratio of 97:3 to form a In the green sub-pixel, GH as a green host and PD13 (Ir(ppy)) as a green dopant are formed. 3 ) are co-deposited on the first hole transport layer in a weight ratio of 92:8 to form a In the red sub-pixel, the green sub-pixel, and the blue sub-pixel, BH as a blue host and FD5 as a blue dopant are commonly co-deposited throughout the first red emission layer and the first green emission layer at a weight ratio of 99:1 to form a first green emission layer having a thickness of As a result, a first emission layer including a first red emission layer, a first green emission layer and a first blue emission layer is formed.

[0496] ET29 is deposited on the first blue emission layer to form a A first electron transport layer with a thickness of 100 Å is formed, thereby forming a first emission unit including a first hole injection layer, a first hole transport layer, a first emission layer and a first electron transport layer.

[0497] As an n-type charge generation layer, ET36 and Yb (wherein the content of Yb is 1 wt%) are co-deposited on the first electron transport layer. and as a p-type charge generating layer, HT3 and F4-TCNQ were co-deposited in a weight ratio of 95:5 to form a The first charge generation layer has a thickness of .

[0498] HT3 is deposited on the first charge generation layer to form a The second hole transport layer has a thickness of .

[0499] In the red sub-pixel, HT18 is deposited on the second hole transport layer. and in the green sub-pixel, HT45 is deposited on the second hole transport layer to A thickness of 1000 Å is formed to form a hole auxiliary layer.

[0500] In the red sub-pixel, RH as the red host and PD9 (Ir(piq)) as the red dopant are used. 2 (acac)) were co-deposited on the hole-assisting layer in a weight ratio of 97:3 to form a In the green sub-pixel, GH as a green host and PD13 (Ir(ppy)) as a green dopant are formed.3 ) are co-deposited on the hole auxiliary layer in a weight ratio of 92:8 to form a In the red sub-pixel, the green sub-pixel, and the blue sub-pixel, BH as a blue host and FD5 as a blue dopant are commonly co-deposited throughout the second red emission layer and the second green emission layer at a weight ratio of 99:1 to form a second green emission layer having a thickness of As a result, a second emission layer including a second red emission layer, a second green emission layer and a second blue emission layer is formed.

[0501] ET37 is commonly deposited throughout the second emitter layer to form a The second buffer layer is co-deposited with ET29 and Liq in a ratio of 1:1 to form a A second electron transport layer with a thickness of 100 Å is formed, thereby forming a second emission unit including a second hole transport layer, a hole auxiliary layer, a second emission layer, a second buffer layer and a second electron transport layer.

[0502] Ag:Mg is deposited on the second electron transport layer to form a The cathode is formed by depositing HT28 on the cathode to form a A capping layer with a thickness of is formed, thereby completing the manufacture of the light-emitting device.

[0503]

[0504]

[0505] Example 2

[0506] A light emitting device was manufactured in the same manner as in Example 1, except that the first blue emission layer was formed on the first hole transport layer in the blue sub-pixel instead of being commonly formed throughout the first red emission layer and the first green emission layer in the red, green, and blue sub-pixels.

[0507] Comparative Example 1

[0508] In addition, the first blue emission layer is formed on the first hole transport layer in the blue sub-pixel instead of being commonly formed throughout the first red emission layer and the first green emission layer in the red sub-pixel, the green sub-pixel, and the blue sub-pixel, the second blue emission layer is formed on the second hole transport layer in the blue sub-pixel instead of being formed on the hole auxiliary layer in the red sub-pixel, the green sub-pixel, and the blue sub-pixel, and the thickness of the second electron transport layer becomes Otherwise, the light emitting device was manufactured in the same manner as in Example 1.

[0509] Comparative Example 2

[0510] A light emitting device was manufactured in the same manner as in Example 1, except that CBP was used instead of RH as a red host and CBP was used instead of GH as a green host when forming the first emission layer and the second emission layer.

[0511] Comparison Example 3

[0512] 15Ω / cm 2 ITO / Ag / ITO A glass substrate (manufactured by Corning Incorporated) was cut into a size of 50 mm×50 mm×0.7 mm, ultrasonically treated with isopropyl alcohol and pure water for 5 minutes each, cleaned by UV irradiation and exposure to ozone for 15 minutes, and mounted in a vacuum evaporation apparatus.

[0513] HT3 and F4-TCNQ were co-deposited on a glass substrate (e.g., ITO / Ag / ITO anode) at a weight ratio of 98:2 to form a A hole injection layer having a thickness of , and HT3 is deposited on the first hole injection layer to form a The hole transport layer has a thickness of .

[0514] In the red sub-pixel, HT18 is deposited on the hole transport layer. The thickness of HT45 is deposited on the hole transport layer. A thickness of 1000 Å is formed to form a hole auxiliary layer.

[0515] In the red sub-pixel, RH as the red host and PD9 (Ir(piq)) as the red dopant are used. 2 (acac)) were co-deposited on the hole-assisting layer in a weight ratio of 97:3 to form a In the green sub-pixel, GH as a green host and PD13 (Ir(ppy)) as a green dopant are used. 3 ) are co-deposited on the hole auxiliary layer in a weight ratio of 92:8 to form a In the red sub-pixel, the green sub-pixel, and the blue sub-pixel, BH as a blue host and FD5 as a blue dopant are commonly co-deposited throughout the red emission layer and the green emission layer at a weight ratio of 99:1 to form a green emission layer having a thickness of As a result, an emission layer including a red emission layer, a green emission layer and a blue emission layer is formed.

[0516] ET37 is deposited on the emitter layer to form a A buffer layer with a thickness of , and ET29 and Liq are co-deposited in a ratio of 1:1 to form The thickness of the electron transport layer is .

[0517] Ag:Mg is deposited on the electron transport layer to form a The cathode is formed by depositing HT28 on the cathode to form a A capping layer with a thickness of is formed, thereby completing the manufacture of the light-emitting device.

[0518] Evaluation Example 1

[0519] For the light-emitting devices of Examples 1 and 2 and Comparative Examples 1 to 3, the LUMO energy (LUMO RH ) level, the LUMO energy of the green body (LUMO GH ) level, the LUMO energy of the blue main body (LUMO BH ) levels, and the results are shown in Table 1.

[0520] The driving voltage (V) and efficiency (Cd / A) at a brightness of 1,500 nit were measured by using a color luminance meter, a Keithley source meter device, and a current fixed room temperature life device, and the results are shown in Table 1. The efficiency was evaluated based on the efficiency of Comparative Example 2 as 100%, and the characteristics of each device were evaluated accordingly.

[0521] [Table 1]

[0522]

[0523]

[0524] Referring to Table 1, the light emitting device of Example 1 satisfies the LUMO RH Levels are smaller than the LUMO of the blue body BH The horizontal condition i and the LUMO of the green body GH Levels are smaller than the LUMO of the blue body BH In this regard, it is confirmed that the light emitting device of Example 1 has excellent efficiency compared with the light emitting device of Comparative Example 2 which does not satisfy Condition i and / or Condition ii.

[0525] Referring to Table 1, it is confirmed that the light-emitting device of Comparative Example 3 composed of a single stack exhibits efficiency characteristics that are significantly weaker than those of the tandem light-emitting devices of Examples 1 and 2. Referring to Table 1, the light-emitting device of Comparative Example 1 has the same device characteristics as the light-emitting device of Example 2. However, although different from Comparative Example 1, in the case of the light-emitting device of Example 2, the manufacturing process is simplified by applying a blue common emission layer without applying a fine metal mask (FMM), thereby improving processability compared to the light-emitting device of Comparative Example 1 in which the blue common emission layer is not used.

[0526] According to the embodiment, the light emitting device may have high efficiency and a long lifetime, and thus may be used to manufacture high-quality electronic devices having excellent light efficiency and a long lifetime.

[0527] Embodiments have been disclosed herein, and although terms are employed, they are used and interpreted in a general and descriptive sense only, and not for purposes of limitation. In some cases, unless otherwise specifically stated, as will be apparent to one of ordinary skill in the art, features, characteristics, and / or elements described with respect to an embodiment may be used alone or in combination with features, characteristics, and / or elements described with respect to other embodiments. Therefore, one of ordinary skill in the art will appreciate that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure.

Claims

1. A light emitting device, wherein: The light emitting device comprises: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein The organic layer comprises: m transmitting units; and m-1 charge generating units, each of which is arranged between every two adjacent emission units among the m emission units, Each of the m emission units includes a first sub-pixel, a second sub-pixel and a third sub-pixel, m is an integer of 2 or greater, The m transmitting units include a first transmitting unit and a second transmitting unit, The first transmitting unit includes a 1-1 transmitting layer, a 2-1 transmitting layer and a 3-1 transmitting layer, The 1-1 emission layer is arranged on the first sub-pixel of the first emission unit and emits a first color light, The 2-1 emission layer is arranged on the second sub-pixel of the first emission unit and emits a second color light, The 3-1 emission layer is commonly arranged throughout the first sub-pixel of the first emission unit, the second sub-pixel of the first emission unit, and the third sub-pixel of the first emission unit and emits a third color light, The 1-1 emission layer includes a 1-1 body, The 2-1 emission layer includes a 2-1 body, The 3-1 emission layer includes a 3-1 body, and The lowest unoccupied molecular orbital energy of the 1-1 host is LUMO 1-1 level, the lowest unoccupied molecular orbital energy of the 2-1 host, i.e., LUMO 2-1 level and the lowest unoccupied molecular orbital energy of the 3-1 entity, i.e., LUMO 3-1 The level satisfies conditions a1 and b1: Condition a1 LIGHT 1-1 <LIGHT 3-1 Condition b1 LIGHT 2-1 <LIGHT 3-1 。 2. The light emitting device according to claim 1, wherein: The first color light is red light, The second color light is green light, and The third color light is blue light.

3. The light emitting device according to claim 1, wherein: The m-1 charge generation units each include an n-type charge generation layer and a p-type charge generation layer.

4. The light emitting device according to claim 1, wherein: The second transmitting unit includes a 1-2 transmitting layer, a 2-2 transmitting layer and a 3-2 transmitting layer, The 1-2 emission layer is arranged on the first sub-pixel of the second emission unit and emits a first color light, The 2-2 emission layer is arranged on the second sub-pixel of the second emission unit and emits a second color light, and The 3-2 emission layer: The first sub-pixel of the second emission unit, the second sub-pixel of the second emission unit, and the third sub-pixel of the second emission unit are commonly arranged and emit a third color light, or The third sub-pixel is disposed on the second emission unit and emits a third color light.

5. The light emitting device according to claim 1, wherein: The LUMO 1-1 Level, the LUMO 2-1 Level and the LUMO 3-1 The level satisfies conditions c1 and d1: Condition c1 0eV<LIGHT 3-1 -LIGHT 1-1 ≤0.5eV Condition d1 0eV<LIGHT 3-1 -LIGHT 2-1 ≤0.5eV.

6. The light emitting device according to claim 1, wherein: The 3-1 emission layer is arranged on or below the 1-1 emission layer and the 2-1 emission layer.

7. The light emitting device according to claim 1, wherein: The 1-1 main body and the 2-1 main body are each independently a C1-C 60 Heteroaryl compounds.

8. The light emitting device according to claim 1, wherein: The 1-1 host and the 2-1 host are each independently a compound represented by Formula 1: Formula 1 Among them, in formula 1, X1 is C(R1) or N, X2 is C(R2) or N, L1 to L3 are each independently a single bond, unsubstituted or substituted with at least one R 10 a substituted C6-C 60 Arylene is either unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Heteroarylene, a1 to a3 are each independently an integer from 1 to 5, Ar1 to Ar3, R1 and R2 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Alkyl, unsubstituted or substituted with at least one R 10 a substituted C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10 a substituted C2-C 60 Alkynyl, unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Alkoxy, unsubstituted or substituted with at least one R 10 a substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Heterocyclic group, unsubstituted or substituted with at least one R 10 a substituted C6-C 60 Aryloxy, unsubstituted or substituted with at least one R 10 a substituted C6-C 60 arylthio, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), Two or more adjacent groups among L1 to L3, Ar1 to Ar3, R1 and R2 may be optionally bonded together to form a group which is unsubstituted or substituted with at least one R 10 a substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Heterocyclic group, R 10 a is: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, -Si(Q 11 )(Q 12 )(Q 13 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy or C6-C 60 Arylthio, each unsubstituted or substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, -Si(Q 21 )(Q 22 )(Q 23 )、-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 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 Each is independently: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or C3-C 60 Carbocyclic or C1-C 60 Heterocyclic groups, each unsubstituted or substituted with deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 heterocyclic group or a combination thereof.

9. The light emitting device according to claim 8, wherein: L1 to L3 are each independently a single bond, unsubstituted or substituted with at least one R 10 a substituted C6-C 30 Arylene is either unsubstituted or substituted with at least one R 10 a substituted C1-C 30 Heteroarylene.

10. The light emitting device according to claim 8, wherein: Ar1 to Ar3 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C1-C 60 Alkyl, C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10 a substituted C6-C 60 Aryl, unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Heteroaryl or -Si(Q1)(Q2)(Q3).

11. The light emitting device according to claim 8, wherein: R1 and R2 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C1-C 60 Alkyl, C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10 a substituted C6-C 60 Aryl is either unsubstituted or substituted with at least one R 10 a substituted C1-C 60 Heteroaryl.

12. The light emitting device according to claim 1, wherein: The 1-1 entity and the 2-1 entity are each independently selected from the following compounds:

13. The light emitting device according to claim 1, wherein: The first emission unit includes a first hole transport region and a first electron transport region, and The second emission unit includes a second hole transport region and a second electron transport region.

14. The light emitting device according to claim 13, wherein: The first electrode is an anode, The second electrode is a cathode, The first hole transport region and the second hole transport region each independently include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer or a combination thereof, and The first electron transport region and the second electron transport region each independently include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer or a combination thereof.

15. The light emitting device according to claim 13, wherein: The first electron transport region includes a first electron transport material, and The lowest unoccupied molecular orbital energy of the first electron transport material is LUMO ET1 level and the lowest unoccupied molecular orbital energy of the 3-1 entity, i.e., LUMO 3-1 The level meets condition e1: Condition e1 LIGHT 3-1 ≥LIGHT ET1 。 16. The light emitting device according to claim 13, wherein: The first electron transport region includes a first electron transport material, and The lowest unoccupied molecular orbital energy of the first electron transport material is LUMO ET1 level and the lowest unoccupied molecular orbital energy of the 3-1 entity, i.e., LUMO 3-1 The level meets the condition f1: Condition f1 0eV≤LIGHT 3-1 -LIGHT ET1 ≤0.3eV.

17. The light emitting device according to claim 1, wherein: The light emitting device further comprises: A first capping layer is outside the first electrode; or The second capping layer is outside the second electrode.

18. An electronic device, wherein: The electronic device includes the light emitting device according to any one of claims 1 to 17.

19. The electronic device according to claim 18, wherein: The electronic device further comprises: A thin film transistor, wherein The thin film transistor includes a source electrode and a drain electrode, and The first electrode of the light emitting device is electrically connected to the source electrode or the drain electrode.

20. The electronic device according to claim 18, wherein: The electronic device further includes: a color filter, a color conversion layer, a touch screen layer, a polarization layer, or a combination thereof.

Images