Organic compounds, organic light-emitting diodes containing them, and organic light-emitting devices.

Abstract

To provide an organic light emitting diode and an organic light emitting device enabling low-power driving with reduced driving voltage and improved luminous efficiency.SOLUTION: Provided is an organic compound represented by the following formula 1. Also provided is an organic light emitting device that comprises: a substrate; and an organic light emitting diode positioned on the top of the substrate and including a first electrode, a second electrode facing the first electrode, and a first emitting part between the first electrode and the second electrode, the first emitting part including a first emitting material layer, wherein the first emitting material layer includes a first compound that is the organic compound.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an organic compound, and more specifically, to an organic compound having advantages in driving voltage and luminous efficiency, and an organic light emitting diode and an organic light emitting device comprising the same.

Background Art

[0002] Recently, along with the enlargement of display devices, the demand for flat display elements that occupy less space is increasing. As one of such flat display elements, the technology of organic light emitting diodes (OLEDs) is developing at a rapid pace.

[0003] An organic light emitting diode is an element that, when electrons and holes are injected from a negative electrode and a positive electrode into a light emitting material layer formed between the electron injection electrode (negative electrode) and the hole injection electrode (positive electrode), the electrons and holes form pairs and then emit light while disappearing. It not only allows the element to be formed on a flexible transparent substrate such as plastic, but also can be driven at a low voltage (10V or less), and has the advantages of relatively low power consumption and excellent color rendering properties.

[0004] The organic light emitting diode is formed on a substrate, and includes a first electrode as a positive electrode, a second electrode spaced apart from and facing the first electrode, and an organic light emitting layer positioned between the first electrode and the second electrode.

[0005] There have been many studies and developments on the materials of the organic light emitting layer, but up to now, organic light emitting diodes still have limitations in driving voltage and luminous efficiency.

Summary of Invention

Problems to be Solved by the Invention

[0006] The present invention intends to solve the problems of high driving voltage and low luminous efficiency in organic light emitting diodes and organic light emitting devices.

Means for Solving the Problems

[0007] To solve the aforementioned problems, the present invention is represented by chemical formula 1, where a1 is an integer from 0 to 5, a2 is an integer from 0 to 3, each R1 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1 to C10 alkyl groups, each R2 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1 to C10 alkyl groups, substituted or unsubstituted C6 to C60 aryl groups, and substituted or unsubstituted C3 to C60 heteroaryl groups, and when a1 is 2 or more, multiple R1s are different even if they are the same as each other. Also, if a2 is 2 or more, multiple R2s may be the same or different from each other, and each of L1, L2, and L3 is independently selected from the group consisting of single bonds (direct bonds), substituted or unsubstituted C6-C60 arylene groups, and substituted or unsubstituted C3-C60 heteroarylene groups, and Ar1 is selected from chemical formulas 1a-1 to 1a-5, in chemical formula 1a-1 b1 is an integer from 0 to 5, in chemical formula 1a-2 b2 is an integer from 0 to 7, and in each of chemical formulas 1a-3 to 1a-5 b3 is an integer from 0 to 4 In chemical formulas 1a-4, V1 is selected from O, S, and C(R3)2; in chemical formula 1a-5, V2 is selected from O and S; in each of chemical formulas 1a-1 to 1a-5, each R3 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups; when b1, b2, and b3 are each 2 or more, the multiple R3s may be the same or different from each other; and Ar2 is a chemical formula Selected from 1b-1 and chemical formula 1b-2, where b4 is an integer from 0 to 4, and each R4 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups, and if b4 is 2 or more, the multiple R4s may be the same or different from each other, and in chemical formula 1b-2, R5 is hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups,The present invention provides organic compounds selected from the group consisting of substituted or unsubstituted C6-C30 aryl groups.

[0008] [Chemical formula 1] TIFF0007943889000001.tif79170

[0009] [Chemical formula 1a-1] TIFF0007943889000002.tif24170

[0010] [Chemical formula 1a-2] TIFF0007943889000003.tif51170

[0011] [Chemical formula 1a-3] TIFF0007943889000004.tif60170

[0012] [Chemical formula 1a-4] TIFF0007943889000005.tif41170

[0013] [Chemical formula 1a-5] TIFF0007943889000006.tif46170

[0014] [Chemical formula 1b-1] TIFF0007943889000007.tif32170

[0015] [Chemical formula 1b-2] TIFF0007943889000008.tif39170

[0016] In the organic compound of the present invention, Ar1 and Ar2 may be different from each other.

[0017] In another embodiment, the present invention provides an organic light-emitting device comprising: a substrate; a first electrode; a second electrode facing the first electrode; and a first light-emitting portion located between the first electrode and the second electrode, the first light-emitting material layer comprising an organic light-emitting diode located on the upper part of the substrate, wherein the first light-emitting material layer comprises a first compound, which is the aforementioned organic compound.

[0018] In the organic light-emitting diode according to the present invention, the light-emitting material layer contains the organic compound (first host) of the present invention, which reduces the driving voltage of the organic light-emitting diode and the organic light-emitting device, improves luminous efficiency, and enables low-power operation.

[0019] Furthermore, in the organic light-emitting diode according to the present invention, the light-emitting material layer includes a first host, a second host, and a dopant, which further reduces the driving voltage of the organic light-emitting diode and the organic light-emitting device, further improves the luminous efficiency, and enables low-power operation.

[0020] Furthermore, in the organic light-emitting diode according to the present invention, by including at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 8 in the electron transport layer adjacent to the light-emitting material layer, the driving voltage of the organic light-emitting diode and organic light-emitting device is further reduced, the luminous efficiency is further improved, and low-power operation is possible.

[0021] Furthermore, the organic light-emitting diode of the present invention has a multi-stack structure by including a first light-emitting section containing a first green light-emitting material layer and a second green light-emitting section containing a second light-emitting material layer, and at least one of the first and second green light-emitting material layers contains the organic compound of the present invention having a specific structure (chemical formula 1). Therefore, in the organic light-emitting diode of the present invention and the organic light-emitting device containing the same, the driving voltage is reduced and the luminous efficiency is increased.

[0022] Furthermore, the organic light-emitting diode of the present invention has a multi-stack structure by including a first light-emitting section containing a first yellow-green light-emitting material layer and a second light-emitting section containing a second green light-emitting material layer, and at least one of the first and second yellow-green light-emitting material layers contains the organic compound of the present invention having a specific structure (chemical formula 1). Therefore, in the organic light-emitting diode of the present invention and the organic light-emitting device containing the same, the driving voltage is reduced and the luminous efficiency is increased.

[0023] Furthermore, the present invention provides a white organic light-emitting diode with a multi-stack structure comprising at least one of a green light-emitting material layer and a yellow-green light-emitting material layer, wherein at least one of the green light-emitting material layer and the yellow-green light-emitting material layer comprises the organic compound of the present invention having a specific structure (chemical formula 1). Therefore, in the organic light-emitting diode of the present invention and the organic light-emitting device comprising the same, the driving voltage is reduced and the luminous efficiency is increased. [Brief explanation of the drawing]

[0024] [Figure 1] Figure 1 is a schematic circuit diagram of an organic light-emitting display device.

[0025] [Figure 2] Figure 2 is a schematic cross-sectional view of an organic light-emitting display device according to a first embodiment of the present invention.

[0026] [Figure 3] Figure 3 is a schematic cross-sectional view of an organic light-emitting diode according to a second embodiment of the present invention.

[0027] [Figure 4] Figure 4 is a schematic cross-sectional view of an organic light-emitting diode according to a third embodiment of the present invention.

[0028] [Figure 5] Figure 5 is a schematic cross-sectional view of an organic light-emitting display device according to a fourth embodiment of the present invention.

[0029] [Figure 6]Figure 6 is a schematic cross-sectional view of an organic light-emitting diode according to a fifth embodiment of the present invention.

[0030] [Figure 7] Figure 7 is a schematic cross-sectional view of an organic light-emitting diode according to a sixth embodiment of the present invention.

[0031] [Figure 8] Figure 8 is a schematic cross-sectional view of an organic light-emitting diode according to the seventh embodiment of the present invention.

[0032] [Figure 9] Figure 9 is a schematic cross-sectional view of an organic light-emitting diode according to the eighth embodiment of the present invention.

[0033] [Figure 10] Figure 10 is a schematic cross-sectional view of an organic light-emitting diode according to the ninth embodiment of the present invention. [Modes for carrying out the invention]

[0034] The advantages and features of the present invention, and methods for achieving them, will become clearer with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and can be embodied in a variety of different forms, although these embodiments are provided to complete the disclosure of the present invention and to fully inform those who are ordinary skill in the art to which the invention pertains, and the present invention is defined only by the scope of the claims.

[0035] The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings illustrating embodiments of the present invention are illustrative, and the present invention is not limited to those shown. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present invention, if it is determined that a specific explanation of related prior art may unnecessarily obscure the gist of the invention, such detailed explanation will be omitted. Wherever "includes," "has," "becomes," etc., are used as referred to herein, other parts may be added unless "only" is used. When a component is expressed singly, it includes cases where it includes multiple components unless there is a particularly explicit provision regarding the base material.

[0036] In interpreting the constituent elements, they shall be interpreted as including a margin of error, even if not explicitly stated otherwise.

[0037] When describing spatial relationships, for example, if the relationship between two parts is described using phrases like "on top," "above," "below," or "beside," then, unless "immediately" or "directly" is used, it is permissible for one or more other parts to be located between the two parts.

[0038] When describing temporal relationships, for example, when a temporal sequence is described using phrases like "after," "following," "next," or "before," it can include cases that are not continuous unless "immediately" or "directly" is used.

[0039] While terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical concept of the present invention.

[0040] Each of the various embodiments of the present invention is partially or entirely combinable or combined with one another, enabling a variety of technically diverse interlocking and driving processes. Each embodiment may be implemented independently of the others or in correlation with one another.

[0041] Preferred embodiments of the present invention will be described below with reference to the drawings.

[0042] The organic light-emitting diode of the present invention comprises the organic compound of the present invention. Such an organic light-emitting diode may be incorporated into an organic light-emitting device such as an organic light-emitting display device or a lighting device. As an example, a display device to which the organic light-emitting diode of the present invention is applied will be described.

[0043] Figure 1 is a schematic circuit diagram of an organic light-emitting display device.

[0044] As shown in Figure 1, the organic light-emitting display device has gate wiring GL, data wiring DL, and power wiring PL that intersect with each other and define a pixel region P. A switching thin-film transistor Ts, a driving thin-film transistor Td, a storage capacitor Cst, and an organic light-emitting diode D are formed in the pixel region P. The pixel region P may include a red pixel region, a green pixel region, and a blue pixel region. Furthermore, the pixel region P may also include a white pixel region.

[0045] The switching thin-film transistor Ts is connected to the gate wiring GL and data wiring DL, while the driving thin-film transistor Td and storage capacitor Cst are connected between the switching thin-film transistor Ts and the power wiring PL. The organic light-emitting diode D is connected to the driving thin-film transistor Td.

[0046] In such an organic light-emitting display device, when a gate signal applied to the gate wiring GL turns on the switching thin-film transistor Ts, the data signal applied to the data wiring DL is applied via the switching thin-film transistor Ts to the gate electrode of the driving thin-film transistor Td and one electrode of the storage capacitor Cst.

[0047] The driving thin-film transistor Td is turned on by a data signal applied to its gate electrode. As a result, a current proportional to the data signal flows from the power wiring PL through the driving thin-film transistor Td to the organic light-emitting diode D, and the organic light-emitting diode D emits light with a brightness proportional to the current flowing through the driving thin-film transistor Td.

[0048] In this process, the storage capacitor Cst is charged with a voltage proportional to the data signal, maintaining a constant voltage at the gate electrode of the drive thin-film transistor Td during one frame.

[0049] Therefore, the organic light-emitting display device can display a desired image.

[0050] Figure 2 is a schematic cross-sectional view of an organic light-emitting display device according to a first embodiment of the present invention.

[0051] As shown in Figure 2, the organic light-emitting display device 100 includes a thin-film transistor Tr located on a substrate 110 and an organic light-emitting diode D connected to the thin-film transistor Tr. For example, the substrate 110 has defined red pixel regions, green pixel regions and blue pixel regions, and the organic light-emitting diode D is located in the red pixel region, green pixel region and blue pixel region, respectively. The substrate 110 may also have a yellow-green pixel region defined, in which case the organic light-emitting diode D is also located in the yellow-green pixel region. That is, organic light-emitting diodes D that emit red, green and blue light are provided in the red pixel region, green pixel region, blue pixel region and yellow-green pixel region, respectively.

[0052] The substrate 110 may be a glass substrate or a flexible substrate. For example, the flexible substrate may be any one of the following: a polyimide (PI) substrate, a polyethersulfone (PES) substrate, a polyethylene naphthalate (PEN) substrate, a polyethylene terephthalate (PET) substrate, and a polycarbonate (PC) substrate.

[0053] A buffer layer 120 is formed on the substrate 110, and a thin-film transistor Tr is formed on the buffer layer 120. The buffer layer 120 may be made of an inorganic insulating material such as silicon oxide or silicon nitride. The buffer layer 120 may also have a multilayer structure by including a first layer made of silicon oxide and a second layer made of silicon nitride. The buffer layer 120 may be omitted, in which case the thin-film transistor Tr may be formed on the substrate 110.

[0054] A semiconductor layer 122 is formed on the buffer layer 120. The semiconductor layer 122 may be made of an oxide semiconductor material or polycrystalline silicon.

[0055] If the semiconductor layer 122 is made of an oxide semiconductor material, a light-shielding pattern (not shown) may be formed on the lower part of the semiconductor layer 122. The light-shielding pattern prevents light from entering the semiconductor layer 122 and prevents the semiconductor layer 122 from degrading due to light. Alternatively, the semiconductor layer 122 may be made of polycrystalline silicon, in which case impurities may be doped at both ends of the semiconductor layer 122.

[0056] A gate insulating film 124 made of an insulating material is formed on the upper part of the semiconductor layer 122. The gate insulating film 124 may be made of an inorganic insulating material such as silicon oxide or silicon nitride.

[0057] A gate electrode 130, made of a conductive material such as metal, is formed on top of the gate insulating film 124, corresponding to the center of the semiconductor layer 122.

[0058] In Figure 2, the gate insulating film 124 is formed on the front surface of the substrate 110, but the gate insulating film 124 may be patterned in the same shape as the gate electrode 130.

[0059] An interlayer insulating film 132 made of an insulating material is formed on the upper part of the gate electrode 130. The interlayer insulating film 132 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride, or it may be formed of an organic insulating material such as benzocyclobutene or photo-acrylic.

[0060] The interlayer insulating film 132 has first and second contact holes 134 and 136 that expose both sides of the semiconductor layer 122. The first and second contact holes 134 and 136 are located on both sides of the gate electrode 130, spaced apart from the gate electrode 130.

[0061] Here, the first and second contact holes 134 and 136 are formed in the interlayer insulating film 132 and the gate insulating film 124. Alternatively, if the gate insulating film 124 is patterned in the same shape as the gate electrode 130, the first and second contact holes 134 and 136 may be formed only within the interlayer insulating film 132.

[0062] A source electrode 140 and a drain electrode 142, made of a conductive material such as metal, are formed on the interlayer insulating film 132.

[0063] The source electrode 140 and the drain electrode 142 are positioned spaced apart from the gate electrode 130 and contact both sides of the semiconductor layer 122 via the first and second contact holes 134 and 136, respectively.

[0064] The semiconductor layer 122, gate electrode 130, source electrode 140, and drain electrode 142 form a thin-film transistor Tr, which functions as a driving element.

[0065] The thin-film transistor Tr has a coplanar structure in which the gate electrode 130, source electrode 140, and drain electrode 142 are located on top of the semiconductor layer 122.

[0066] Alternatively, the thin-film transistor Tr may have an inverted staggered structure in which the gate electrode is located at the bottom of the semiconductor layer and the source electrode and drain electrode are located at the top of the semiconductor layer. In this case, the semiconductor layer may be made of amorphous silicon.

[0067] Although not shown in the diagram, gate wiring and data wiring intersect to define the pixel region, and switching elements are further formed that are connected to the gate wiring and data wiring. The switching elements are connected to thin-film transistors Tr, which act as driving elements.

[0068] Furthermore, power wiring may be formed parallel to or separated from data wiring, and a storage capacitor may be configured to maintain a constant voltage at the gate electrode of a thin-film transistor Tr acting as a driving element during one frame.

[0069] A planarization layer 150 is formed covering the thin-film transistor Tr, having a drain contact hole 152 that exposes the drain electrode 142 of the thin-film transistor Tr.

[0070] On the planarization layer 150, first electrodes 160 are formed separately for each pixel region, and are connected to the drain electrode 142 of the thin-film transistor Tr via drain contact holes 152.

[0071] The first electrode 160 may be anode and may include a transparent conductive oxide layer made of a conductive material with a relatively large work function value, such as transparent conductive oxide (TCO). For example, the transparent conductive oxide layer of the first electrode 160 may include at least one of indium-tin oxide (ITO), indium-zinc oxide (IZO), indium-tin-zinc oxide (ITZO), tin oxide (SnO), zinc oxide (ZnO), indium-copper oxide (ICO), and aluminum:zinc oxide (Al:ZnO;AZO).

[0072] If the organic light-emitting display device 100 of the present invention is of the bottom-emission type, the first electrode 160 may have a single-layer structure of a transparent conductive oxide layer.

[0073] Alternatively, if the organic light-emitting device 100 of the present invention is of the top-emission type, the first electrode 160 may further include a reflective layer and have a double-layer or triple-layer structure. For example, the reflective layer may be made of silver or an aluminum-palladium-copper (APC) alloy. In the top-emission type organic light-emitting diode D, the first electrode 160 may have a double-layer structure of Ag / ITO or APC / ITO, or a triple-layer structure of ITO / Ag / ITO or ITO / APC / ITO.

[0074] Furthermore, a bank layer 166 is formed on the planarization layer 150, covering the edges of the first electrode 160. The bank layer 166 corresponds to the pixel region and exposes the center of the first electrode 160.

[0075] An organic light-emitting layer 162 is formed on the first electrode 160. The organic light-emitting layer 162 may include one light-emitting portion containing a light-emitting material layer. Alternatively, the organic light-emitting layer 162 may include a number of light-emitting portions, each containing a light-emitting material layer. Furthermore, the organic light-emitting layer 162 may further include a charge generation layer (CGL) located between adjacent light-emitting portions.

[0076] Each light-emitting portion may further include at least one of the following: a hole injection layer (HIL), a hole transporting layer (HTL), an electron blocking layer (EBL), a hole blocking layer (HBL), an electron transporting layer (ETL), or an electron injection layer (EIL), and may have a multilayer structure.

[0077] The organic light-emitting layer 162 is located separately in the red pixel region, the green pixel region, and the blue pixel region. As described later, in the organic light-emitting diode D in the green pixel region, the organic light-emitting layer 162 contains the organic compound of the present invention, which reduces the driving voltage of the organic light-emitting diode D and the organic light-emitting display device 100 containing it, and increases the luminous efficiency. For example, the light-emitting material layer of the organic light-emitting layer 162 may contain the organic compound of the present invention.

[0078] A second electrode 164 is formed on the upper part of the substrate 110 on which the organic light-emitting layer 162 is formed. The second electrode 164 is located in front of the display area, is made of a conductive material with a relatively small work function value, and can be used as a negative electrode (cathode). For example, the second electrode 164 may be made of aluminum (Al), magnesium (Mg), silver (Ag), or an alloy thereof, for example, an aluminum-magnesium alloy (AlMg) or a silver-magnesium alloy (MgAg). If the organic light-emitting display device 100 is an upper light-emitting type, the second electrode 164 has a thin thickness and has light-transmitting (semi-transmitting) properties.

[0079] The first electrode 160, the organic light-emitting layer 162, and the second electrode 164 constitute an organic light-emitting diode D.

[0080] An encapsulation layer (or encapsulation film) 170 is formed on the second electrode 164 to prevent external moisture from penetrating the organic light-emitting diode D. The encapsulation layer 170 may, but is not limited to, have a laminated structure of a first inorganic insulating layer 172, an organic insulating layer 174, and a second inorganic insulating layer 176. The encapsulation layer 170 may also be omitted.

[0081] If the organic light-emitting display device 100 is a bottom-emitting type, a metal plate (not shown) may be further provided on top of the encapsulation layer 170.

[0082] The organic light-emitting display device 100 may include color filters (not shown) corresponding to red, green, and blue pixel regions. The color filter layer may include red color filter patterns, green color filter patterns, and blue color filter patterns corresponding to the red, green, and blue pixel regions, respectively. When the organic light-emitting display device 100 includes a color filter layer, the color purity of the organic light-emitting display device 100 can be improved.

[0083] If the organic light-emitting device 100 is a bottom-emitting type, the color filter may be located between the organic light-emitting diode D and the substrate 110, for example, between the interlayer insulating film 132 and the planarization layer 150. Alternatively, if the organic light-emitting device 100 is a top-emitting type, the color filter may be located above the organic light-emitting diode D, for example, above the second electrode 164 or above the encapsulation layer 170.

[0084] The organic light-emitting display device 100 may further include a polarizing plate (not shown) for reducing reflection of external light. For example, the polarizing plate may be a circular polarizing plate. If the organic light-emitting display device 100 is a bottom-emitting type, the polarizing plate may be located at the bottom of the substrate 110. If the organic light-emitting display device 100 of the present invention is an top-emitting type, the polarizing plate may be located at the top of the encapsulation layer 170.

[0085] Furthermore, in the top-emitting type organic light-emitting display device 100, a cover window (not shown) may be attached to the encapsulation layer 170 or the polarizing plate. In this case, the substrate 110 and the cover window have flexible properties, making it possible to realize a flexible organic light-emitting display device.

[0086] The organic light-emitting display device 100 may further include a touch layer or touch panel located between the organic light-emitting diode D and the cover window.

[0087] Figure 3 is a schematic cross-sectional view of an organic light-emitting diode according to a second embodiment of the present invention.

[0088] As shown in Figure 3, the organic light-emitting diode D includes first and second electrodes 160 and 164 facing each other, and an organic light-emitting layer 162 located between the first and second electrodes 160 and 164, the organic light-emitting layer 162 including an emitting material layer 230 (EML). The emitting material layer 230 may be a green light-emitting material layer or a yellow-green light-emitting material layer.

[0089] The organic light-emitting display device (100 in Figure 2) includes at least one of the following: a red pixel region, a green pixel region, a blue pixel region, and a yellow-green pixel region. The organic light-emitting diode D may be located in at least one of the green pixel region and the yellow-green pixel region. The organic light-emitting diode D includes a red light-emitting material layer in the red pixel region and a blue light-emitting material layer in the blue pixel region.

[0090] The first electrode 160 is a positive electrode that injects holes, and the second electrode 164 is a negative electrode that injects electrons. One of the first electrode 160 and the second electrode 164 is a reflective electrode, and the other is a transmissive (semitransmissive) electrode.

[0091] For example, the first electrode 160 may include a transparent conductive material layer made of ITO or IZO, and the second electrode 164 may consist of any one of aluminum (Al), magnesium (Mg), silver (Ag), aluminum-magnesium alloy (AlMg), or silver-magnesium alloy (MgAg).

[0092] The luminescent material layer 230 contains a first compound 232, which is an organic compound of the present invention represented by chemical formula 1.

[0093] [Chemical formula 1] TIFF0007943889000009.tif79170

[0094] In chemical formula 1, a1 is an integer between 0 and 5, and a2 is an integer between 0 and 3. Each R1 is independently selected from the group consisting of deuterium and substituted or unsubstituted C1-C10 alkyl groups. Each R2 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. If a1 is 2 or more, the multiple R1s may be the same or different from each other. If a2 is 2 or more, multiple R2s may be the same or different from each other. L1, L2, and L3 are independently selected from the group consisting of single bonds (direct bonds), substituted or unsubstituted C6-C60 arylene groups, and substituted or unsubstituted C3-C60 heteroarylene groups. Ar1 is selected from chemical formulas 1a-1 to 1a-5. [Chemical formula 1a-1] TIFF0007943889000010.tif24170

[0095] [Chemical formula 1a-2] TIFF0007943889000011.tif51170

[0096] [Chemical formula 1a-3] TIFF0007943889000012.tif60170

[0097] [Chemical formula 1a-4] TIFF0007943889000013.tif41170

[0098] [Chemical formula 1a-5] TIFF0007943889000014.tif46170

[0099] In chemical formula 1a-1, b1 is an integer between 0 and 5. In chemical formula 1a-2, b2 is an integer between 0 and 7. In each of the chemical formulas 1a-3 to 1a-5, b3 is an integer between 0 and 4. In chemical formula 1a-4, V1 is selected from O, S, and C(R3)2. In chemical formula 1a-5, V2 is selected from O and S. In each of the chemical formulas 1a-1 to 1a-5, R3 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. If b1, b2, and b3 are each 2 or greater, then the multiple R3s may be the same or different from each other. Ar2 is selected from chemical formulas 1b-1 and 1b-2. [Chemical formula 1b-1] TIFF0007943889000015.tif32170

[0100] [Chemical formula 1b-2] TIFF0007943889000016.tif39170

[0101] In chemical formulas 1b-1 and 1b-2, b4 is an integer between 0 and 4. Each of R4 is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. If b4 is 2 or more, the multiple R4s may be the same or different from each other. In chemical formula 1b-2, each of R5 is independently selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, and substituted or unsubstituted C6-C30 aryl groups.

[0102] In chemical formulas 1a-1 to 1a-5, 1b-1, and 1b-2, the asterisk (*) indicates a bonding site.

[0103] In this invention, "unsubstituted" means that hydrogen atoms are present in such quantities that they satisfy the valency of the compound.

[0104] In the present invention, unless otherwise stated, substituents on alkyl groups, cycloalkyl groups, alkoxy groups, aryl groups, heteroaryl groups, arylene groups, and heteroarylene groups may include at least one of deuterium (D), halogens, cyano groups, hydroxy(hydroxy) groups, C1-C10 alkyl groups, C1-C10 alkoxy groups, C3-C30 cycloalkyl groups, C1-C10 alkylsilyl groups, C1-C10 alkylamino groups, C6-C30 arylsilyl groups, C6-C30 amino groups, C6-C30 aryl groups, and C3-C30 heteroaryl groups. For example, substituents can be selected from the group consisting of D, F, Br, CN, hydroxyl, methyl, ethyl, propyl, butyl (e.g., tert-butyl), methoxy, ethoxy, propoxy, butoxy (e.g., tert-butoxy), cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, trimethylsilyl, trimethylamino, triphenylsilyl, triphenylamino, phenyl, biphenyl, naphthyl, anthracenyl, pyridyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl.

[0105] In the present invention, unless otherwise stated, "alkyl" means a substituted or unsubstituted linear or branched hydrocarbon chain radical. For example, C1-C10 alkyl groups can be selected from the group consisting of methyl, ethyl, propyl, and butyl (e.g., t-butyl).

[0106] In the present invention, unless otherwise stated, "aryl" means a monovalent monocyclic or polycyclic conjugated ring structure. For example, C6-C60 aryl groups can be selected from the group consisting of phenyl, biphenyl, terphenyl, naphthyl, anthracenyl, pentarenyl, indenyl, indenoindenyl, heptarenyl, biphenylenyl, indacenyl, phenalenyl, phenantrenyl, benzophenantrenyl, dibenzophenantrenyl, azlenyl, pyrenyl, fluoranthenyl, triphenylenyl, chrysenyl, tetraphenyl, tetracenyl, pleiadenyl, picenyl, pentaphenyl, pentacenyl, fluorenyl, indenofluorenyl, and spirofluorenyl groups.

[0107] In the present invention, unless otherwise stated, "arirene" means a monovalent monocyclic or polycyclic conjugated ring structure. For example, C6-C60 arylene groups can be selected from the group consisting of phenylene, biphenyl, terphenylene, naphthylene, anthracenylene, pentarenylene, indenylene, indenoindenylene, heptareninylene, biphenylenylene, indacenylene, phenalenylene, phenantrenylene, benzophenantrenylene, dibenzophenantrenylene, adurenylene, pyrenylene, fluoranthenylene, triphenylenylene, crisenylene, tetraphenylene, tetracenylene, pleiadenyl, picenylene, pentaphenylene, pentaseninylene, fluorenylene, indenofluorenylene, and spirofluorenylene.

[0108] Furthermore, in the present invention, unless otherwise stated, C3-C60 heteroaryl groups are pyrrolyl group, pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridadinyl group, triazinyl group, tetradinyl group, imidazolyl group, pyrazolyl group, indolyl group, isoindolyl group, indazolyl group, indolidinyl group, pyrrolidinyl group, carbazolyl group, benzocarbazolyl group, dibenzocarbazolyl group, indolocarbazolyl group, indenocarbazolyl group, benzoflocarbazolyl group, benzothienocarbazolyl group, quinolinyl group, isoquinolinyl group, phthalazinyl group, quinoxalinyl group, cinolinyl group, quinazolinyl group, quinozolinyl group, quinolidinyl group, prinyl group, phthalazinyl group, quinoxalinyl group, benzoquinolinyl group, benzoisoquinolinyl group, You can choose from the group consisting of benzoquinazolinyl group, benzoquinoxalinyl group, acridinyl group, phenanthrolinyl group, perimidinyl group, phenanthridineyl group, pteridinyl group, synnolinyl group, naphthalidinyl group, furanyl group, pyranyl group, oxazinyl group, oxazolyl group, oxadiazolyl group, triazolyl group, dioxynyl group, benzofuranyl group, dibenzofuranyl group, thiopyranyl group, xanthenyl group, clomenyl group, isoclomenyl group, thioazinyl group, thiophenyl group, benzothiophenyl group, dibenzothiophenyl group, difluoropyradinyl group, benzoflodifronyl group, benzothienobenzothiophenyl group, benzothienodibenzothiophenyl group, benzothienobenzofuranyl group, and benzothienodibenzofuranyl group.

[0109] Furthermore, in the present invention, unless otherwise stated, C3-C60 heteroarylene groups are pyrroylene group, pyridinylene group, pyrimidinylene group, pyrazinylene group, pyridadinylene group, triazinylene group, tetradinylene group, imidazoylene group, pyrazoilen group, indolylene group, isoindolylene group, indazoylene group, indolidinylene group, pyrrolidinylene group, carbazoylene group, benzocarbazoylene group, diben Zocarbazoylene group, indolocarbazoylene group, indenocarbazoylene group, benzoflocarbazoylene group, benzothienocarbazoylene group, quinolinylene group, isoquinolinylene group, phthalazineylene group, quinoxalinylene group, cinolinylene group, quinazolinylene group, quinozolinylene group, quinolinidine group, furinylene group, phthalazineylene group, quinoxalinylene group, benzoquinolinylene group, benzoisoquinolinylene group , benzoquinazolinylene group, benzoquinoxalinylene group, acridinylene group, phenanthrolinylene group, perimidinylene group, phenanthridineylene group, pteridineylene group, synnolinylene group, naphthalidineylene group, furanylene group, pyranylene group, oxazinylene group, oxazolinylene group, oxadiazoylene group, triazolinylene group, deoxynylene group, benzofuranylene group, dibenzofuranylene group, thiopyranylene The group can be selected from the following: xantherine group, clomenylene group, isoclomenylene group, thioazinylene group, thiophenylene group, benzothiophenylene group, dibenzothiophenylene group, diflopyrazinylene group, benzoflodifronylene group, benzothienobenzothiophenylene group, benzothienodibenzothiophenylene group, benzothienobenzofuranylene group, and benzothienodibenzofuranylene group.

[0110] In one embodiment of the present invention, R1 may be unsubstituted or a C6-C60 aryl group (e.g., phenyl) substituted with a C1-C10 alkyl group (e.g., methyl).

[0111] In one embodiment of the present invention, a may be 0.

[0112] In one embodiment of the present invention, L1, L2, and L3 may each be an arylene group of C6 to C60 (for example, phenylene).

[0113] In one embodiment of the present invention, each of b1 to b3 may be an integer from 0 to 2.

[0114] In one embodiment of the present invention, each of R3 may independently be a substituted or unsubstituted C1-C10 alkyl group (e.g., methyl, t-butyl) or a substituted or unsubstituted C6-C60 aryl group (e.g., phenyl).

[0115] In one embodiment of the present invention, b4 may be 0 or 1.

[0116] In one embodiment of the present invention, R4 and R5 may each be a substituted or unsubstituted C6-C60 aryl group (e.g., phenyl).

[0117] As shown in Chemical Formula 1, the organic compound of the present invention has a structure in which a first moisture, which is benzoxazole, a second moisture, which is carbazole, and a third moisture selected from Chemical Formulas 1a-1 to 1a-5 are bonded to a triazine core directly or via a linker. That is, the organic compound of the present invention comprises a triazine core and a first moisture, which is benzoxazole, a second moisture, which is carbazole, and a third moisture different from the first and second moisture. As a result, organic light-emitting diodes and organic light-emitting display devices using the organic compound have advantages in at least one of the driving voltage and luminous efficiency.

[0118] In chemical formula 1, the bonding position between L3 and benzoxazole moiety is identified. For example, the organic compound of the present invention can be represented by one of chemical formulas 1-1 to 1-4.

[0119] [Chemical formula 1-1] TIFF0007943889000017.tif60170

[0120] [Chemical formula 1-2] TIFF0007943889000018.tif98170

[0121] [Chemical formula 1-3] TIFF0007943889000019.tif98170

[0122] [Chemical formula 1-4] TIFF0007943889000020.tif62170

[0123] In each of the chemical formulas 1-1 to 1-4, a1, a2, R1, R2, L1, L2, L3, Ar1, and Ar2 are the same as those defined in chemical formula 1.

[0124] In one embodiment of the present invention, Ar2 is represented by chemical formula 1b-1, L2 is phenylene, and the bonding position of Ar2 can be specified. For example, the organic compounds of the present invention may be represented by chemical formulas 1-5.

[0125] [Chemical formula 1-5] TIFF0007943889000021.tif78170

[0126] In chemical formulas 1-5, a1, a2, R1, R2, L1, L3, and Ar1 are the same as those defined in chemical formula 1, and R4 and b4 are the same as those defined in chemical formula 1b-1.

[0127] In one embodiment of the present invention, Ar2 may be represented by chemical formula 1b-2, and L2 may be a single bond. For example, the organic compounds of the present invention may be represented by chemical formulas 1-6.

[0128] [Chemical formula 1-6] TIFF0007943889000022.tif106170

[0129] In chemical formulas 1-6, a1, a2, R1, R2, L1, L3, and Ar1 are the same as those defined in chemical formula 1, and R4, R5, and b4 are the same as those defined in chemical formula 1b-2.

[0130] The first compound 232, which is an organic compound of the present invention, may be any one of the compounds of chemical formula 2.

[0131] [Chemical formula 2] TIFF0007943889000023.tif233170TIFF0007943889000024.tif195170TIFF0007943 889000025.tif237170TIFF0007943889000026.tif240170TIFF0007943889000027.t if222170TIFF0007943889000028.tif224170TIFF0007943889000029.tif226170TIF F0007943889000030.tif234170TIFF0007943889000031.tif236170TIFF00079438890 00032.tif214170TIFF0007943889000033.tif194170TIFF0007943889000034.tif21 1170TIFF0007943889000035.tif225170TIFF0007943889000036.tif213170TIFF000 7943889000037.tif208170TIFF0007943889000038.tif224170TIFF00079438890000 39.tif246170TIFF0007943889000040.tif239170TIFF0007943889000041.tif174170

[0132] [Example of combination] 1. Synthesis of compound A1 (1) Compound A [Reaction Equation 1-1] TIFF0007943889000042.tif49170

[0133] In a one-neck round-bottom flask, 2,4,6-trichloro-1,3,5-triazine (10 g, 0.054 mol) was dissolved in 100 ml of THF, and the mixture was cooled to -78°C under nitrogen conditions. Then, 19 ml of 2.5 M n-BuLi solution (0.048 mol) was slowly added, and after 30 minutes, carbazole (8.1 g, 0.048 mol) was added. After raising to room temperature, the mixture was reacted for 3 hours. Once the reaction was complete, the substance was completely precipitated using methanol, filtered, and then dissolved again using MC. The resulting substance was concentrated by advancing a column with hexane and methylene chloride (MC). Then, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A (12.7 g, 83%). (2) Compound C-1 [Reaction Equation 1-2] TIFF0007943889000043.tif44170

[0134] In a one-neck round-bottom flask, 7-bromo-2-phenyl-1,3-benzothiazole (20 g, 0.072 mol), bis(diphenylphosphino)ferrocene]dichloropalladium(II) (Pd(dppf)Cl2, 2.6 g, 0.0004 mol), potassium acetate (14.3 g, 0.14 mol), and bis(pinacorato)diborone (B2(pin)2, 27.7 g, 0.11 mol) were dissolved in 250 ml of 1,4-dioxane, and the mixture was refluxed for 3 hours. After the reaction solution was thoroughly cooled to room temperature, it was filtered, washed with MC, and concentrated. The concentrated substance was dissolved in MC, and then filtered using MC and silica gel. After concentrating the filtered solution, impurities were removed using MeOH slurry, and the solution was filtered to obtain compound C-1 (21 g, 90%). (3) Compound A1-i [Reaction Equations 1-3] TIFF0007943889000044.tif47170

[0135] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), phenylboronic acid (3.5 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated with DCB (1,2-dichlorobenzene) to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A1-i. (6.2g, 54%) (4) Compound A1 [Reaction Equations 1-4] TIFF0007943889000045.tif44170

[0136] In a one-neck round-bottom flask, compound A1-i (6.2g, 0.017mol), compound C-1 (6.04g, 0.018mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1g, 0.0009mol), and K2CO3 (4.7g, 0.034mol) were dissolved in a mixture of 1,4-dioxane (100mL) / water (20mL), and the mixture was reacted under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the solution was filtered to obtain compound A1 (9.2g, 80.6%). 2. Synthesis of Compound A5 (1) Compound A5-i [Reaction Equation 2-1] TIFF0007943889000046.tif47170

[0137] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), [1,1'-biphenyl]-4-ylboronic acid (5.6 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A5-i. (8.1g, 59%) (2) Compound A5 [Reaction Equation 2-2] TIFF0007943889000047.tif43170

[0138] In a one-neck round-bottom flask, compound A5-i (8.1g, 0.019mol), compound C-1 (6.6g, 0.021mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.1g, 0.0010mol), and K2CO3 (5.17g, 0.037mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was thoroughly cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A5 was obtained by filtration (8.5g, 76.8%). 3. Synthesis of Compound A6 (1) Compound A6-i [Reaction Equation 3-1] TIFF0007943889000048.tif46170

[0139] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), triphenylene-2-ylboronic acid (7.7 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A6-i. (9.2g, 57%) (2) Compound A6 [Reaction Equation 3-2] TIFF0007943889000049.tif43170

[0140] In a one-neck round-bottom flask, compound A6-i (9.2g, 0.018mol), compound C-1 (6.4g, 0.020mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.0g, 0.0009mol), and K2CO3 (5.00g, 0.036mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 2 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A6 was obtained by filtration (10.2g, 83.8%). 4. Synthesis of Compound A7 (1) Compound A7-i [Reaction Equation 4-1] TIFF0007943889000050.tif47170

[0141] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), (9,9-dimethyl-9H-fluoren-2-yl)boronic acid (6.8 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substances, and the solution was filtered. The precipitated substances were heated in DCB to completely dissolve them, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using a methanol slurry, and the mixture was filtered again to obtain compound A7-i. (8.9g, 59%) (2) Compound A7 [Reaction Equation 4-2] TIFF0007943889000051.tif43170

[0142] In a one-neck round-bottom flask, compound A7-i (8.9g, 0.019mol), compound C-1 (6.6g, 0.021mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.1g, 0.0010mol), and K2CO3 (5.17g, 0.037mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A7 was obtained by filtration (7.5g, 63.1%). 5. Synthesis of Compound A8 (1) Compound A8-i [Reaction Equation 5-1] TIFF0007943889000052.tif46170

[0143] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), (9,9-diphenyl-fluoren-2-yl)boronic acid (10.3 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substances, and the solution was filtered. The precipitated substances were heated in DCB to completely dissolve them, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using a methanol slurry, and the solution was filtered again to obtain compound A8-i. (12.7g, 67%) (2) Compound A8 [Reaction Equation 5-2] TIFF0007943889000053.tif48170

[0144] In a one-neck round-bottom flask, compound A8-i (12.7 g, 0.021 mol), compound C-1 (7.5 g, 0.023 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.2 g, 0.0011 mol), and K2CO3 (5.9 g, 0.043 mol) were dissolved in a mixture of 1,4-dioxane (100 mL) and water (20 mL). The reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A8 was obtained by filtration (13.0 g, 81.0%). 6. Synthesis of Compound A9 (1) Compound A9-i [Reaction Equation 6-1] TIFF0007943889000054.tif48170

[0145] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10.1 g, 0.032 mol), naphthalene-2-ylboronic acid (5.0 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.76 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A9-i. (7.8g, 66%) (2) Compound A9 [Reaction Equation 6-2] TIFF0007943889000055.tif41170

[0146] In a one-neck round-bottom flask, compound A9-i (7.8g, 0.021mol), compound C-1 (7.5g, 0.023mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.2g, 0.0011mol), and K2CO3 (6.0g, 0.044mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A9 was obtained by filtration (9.7g, 81.0%). 7. Synthesis of Compound A19 (1) Compound A19-i [Reaction Equation 7-1] TIFF0007943889000056.tif46170

[0147] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), dibenzofuran-4-ylboronic acid (6.0 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A19-i. (8.5g, 60%) (2) Compound A19 [Reaction Equation 7-2] TIFF0007943889000057.tif46170

[0148] In a one-neck round-bottom flask, compound A19-i (8.5g, 0.019mol), compound C-1 (6.7g, 0.021mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.1g, 0.0010mol), and K2CO3 (5.26g, 0.038mol) were dissolved in a mixture of 1,4-dioxane (100mL) / water (20mL), and the mixture was reacted under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A19 (8.8g, 76.4%). 8. Synthesis of Compound A29 (1) Compound C-2 [Reaction Equation 8-1] TIFF0007943889000058.tif48170

[0149] In a one-neck round-bottom flask, 7-bromo-2-phenyl-1,3-benzothiazole (20 g, 0.072 mol), Pd(dppf)Cl2 (2.6 g, 0.0004 mol), potassium acetate (14.3 g, 0.14 mol), and B2(pin)2 (27.7 g, 0.11 mol) were dissolved in 250 ml of 1,4-dioxane and refluxed for 3 hours. After the reaction solution was thoroughly cooled to room temperature, it was filtered, washed with MC, and concentrated. The concentrated substance was dissolved in MC, and then filtered using MC and silica gel. After concentrating the filtered solution, impurities were removed using MeOH slurry, and the solution was filtered to obtain compound C-2 (21 g, 90%). (2) Compound A29-i [Reaction Equation 8-2] TIFF0007943889000059.tif52170

[0150] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), [1,1'-biphenyl]-3-ylboronic acid (5.6 g, 0.029 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0018 mol), and K2CO3 (8.77 g, 0.063 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substances, and the solution was filtered. The precipitated substances were heated in DCB to completely dissolve them, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using a methanol slurry, and the solution was filtered again to obtain compound A29-i. (8.1g, 65%) (3) Compound A29 [Reaction Equation 8-3] TIFF0007943889000060.tif47170

[0151] In a one-neck round-bottom flask, compound A29-i (8.1g, 0.019mol), compound C-2 (6.29g, 0.018mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1g, 0.0009mol), and K2CO3 (4.7g, 0.034mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A29 was obtained by filtration (8.6g, 80.6%). 9. Synthesis of Compound A30 [Reaction Equation 9] TIFF0007943889000061.tif44170

[0152] In a one-neck round-bottom flask, compound A30-i (8.6g, 0.017mol), compound C-2 (6.29g, 0.018mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1g, 0.0009mol), and K2CO3 (4.7g, 0.034mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A30 was obtained by filtration (8.9g, 79.0%). 10. Synthesis of Compound A105 (1) Compound C-3 [Reaction Equation 10-1] TIFF0007943889000062.tif36170

[0153] In a one-neck round-bottom flask, 6-bromo-2-phenyl-1,3-benzoxazole (20 g, 0.072 mol), Pd(dppf)Cl2 (2.6 g, 0.0004 mol), potassium acetate (14.3 g, 0.14 mol), and B2(pin)2 (27.7 g, 0.11 mol) were dissolved in 250 ml of 1,4-dioxane, and the mixture was refluxed for 3 hours. After the reaction solution was thoroughly cooled to room temperature, it was filtered, washed with MC, and concentrated. The concentrated substance was dissolved in MC, and then filtered using MC and silica gel. After concentrating the filtered solution, impurities were removed using MeOH slurry, and the mixture was filtered to obtain compound C-3 (22 g, 94%). (2) Compound A105 [Reaction Equation 10-2] TIFF0007943889000063.tif38170

[0154] In a one-neck round-bottom flask, compound A1-i (10.0 g, 0.028 mol), compound C-3 (9.9 g, 0.031 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.6 g, 0.0014 mol), and K2CO3 (7.8 g, 0.056 mol) were dissolved in a mixture of 1,4-dioxane (100 mL) and water (20 mL). The reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A105 was obtained by filtration (11.1 g, 76.8%). 11. Synthesis of Compound A115 (1) Compound C-4 [Reaction Equation 11-1] TIFF0007943889000064.tif37170

[0155] In a one-neck round-bottom flask, 5-bromo-2-phenyl-1,3-benzooxazole (20 g, 0.072 mol), Pd(dppf)Cl2 (2.6 g, 0.0004 mol), potassium acetate (14.3 g, 0.14 mol), and B2(pin)2 (27.7 g, 0.11 mol) were dissolved in 250 ml of 1,4-dioxane, and the mixture was refluxed for 3 hours. After the reaction solution was thoroughly cooled to room temperature, it was filtered, washed with MC, and concentrated. The concentrated substance was dissolved in MC, and then filtered using MC, chloroform, and silica gel. After concentrating the filtered solution, impurities were removed using MeOH slurry, and the mixture was filtered to obtain compound C-4 (22.2 g, 95%). (2) Compound A115 [Reaction Equation 11-2] TIFF0007943889000065.tif48170

[0156] In a one-neck round-bottom flask, compound A5-i (8.7g, 0.019mol), compound C-4 (7.45g, 0.023mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.0g, 0.0010mol), and K2CO3 (5.3g, 0.038mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 2 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A115 was obtained by filtration (9.2g, 72.6%). 12. Synthesis of Compound A128 (1) Compound C-5 [Reaction Equation 12-1] TIFF0007943889000066.tif50170

[0157] In a one-neck round-bottom flask, 6-bromo-2-phenyl-1,3-benzothiazole (20 g, 0.072 mol), Pd(dppf)Cl2 (2.6 g, 0.0004 mol), potassium acetate (14.3 g, 0.14 mol), and B2(pin)2 (27.7 g, 0.11 mol) were dissolved in 250 ml of 1,4-dioxane, and the mixture was refluxed for 3 hours. After the reaction solution was thoroughly cooled to room temperature, it was filtered, washed with MC, and concentrated. The concentrated substance was dissolved in MC, and then filtered using MC, chloroform, and silica gel. After concentrating the filtered solution, impurities were removed using MeOH slurry, and the solution was filtered to obtain compound C-5 (21 g, 92%). (2) Compound A128 [Reaction Equation 12-2] TIFF0007943889000067.tif41170

[0158] In a one-neck round-bottom flask, compound A5-i (8.7g, 0.019mol), compound C-5 (7.45g, 0.023mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.0g, 0.0010mol), and K2CO3 (5.3g, 0.038mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 5 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A128 (9.2g, 72.6%). 13. Synthesis of Compound A132 (1) Compound A132-i [Reaction Equation 13-1] TIFF0007943889000068.tif46170

[0159] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.032 mol), dibenzofuran-3-ylboronic acid (5.4 g, 0.025 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.8 g, 0.0016 mol), and K2CO3 (8.8 g, 0.064 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A132-i. (9.9g, 70%) (2) Compound A132 [Reaction Equation 13-2] TIFF0007943889000069.tif45170

[0160] In a one-neck round-bottom flask, compound A132-i (9.9g, 0.022mol), compound C-5 (7.8g, 0.024mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.3g, 0.0011mol), and K2CO3 (6.1g, 0.044mol) were dissolved in a mixture of 1,4-dioxane (100mL) / water (20mL), and the reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A132 was obtained by filtration (9.2g, 83.1%). 14. Synthesis of Compound A83 (1) Compound Di [Reaction Equation 14-1] TIFF0007943889000070.tif50170

[0161] In a one-neck round-bottom flask, 1-bromo carbazole (25 g, 0.1 mol), phenylboronic acid (19 g, 0.153 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 5.9 g, 0.0050 mol), and K2CO3 (28.1 g, 0.044 mol) were dissolved in a mixture of 1,4-dioxane (300 mL) and water (1000 mL). The reaction was carried out under reflux at 110°C for 12 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was completely dissolved in MC and then filtered using silica gel. The resulting solution was concentrated, impurities were removed using methanol slurry, and the compound Di was obtained by filtration (21.4 g, 86.6%). (2) Compound D [Reaction Equation 14-2] TIFF0007943889000071.tif58170

[0162] In a one-neck round-bottom flask, 2,4,6-trichloro-1,3,5-triazine (20 g, 0.11 mol) was dissolved in 200 ml of THF and cooled to -78°C under nitrogen conditions. Then, 38 ml of 2.5 M n-BuLi solution (0.096 mol) was slowly added, and after 30 minutes, 1-phenylcarbazole (21.4 g, 0.096 mol) was added. After raising to room temperature, the mixture was reacted for 3 hours. After the reaction was complete, the substance was completely precipitated using methanol, filtered, and then dissolved in MC. The resulting substance was concentrated by advancing a column with hexane and methylene chloride (MC). Then, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound D (17.9 g, 54%). (3) Compound A83-i [Reaction Equation 14-3] TIFF0007943889000072.tif41170

[0163] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)-4-phenylcarbazole (10 g, 0.026 mol), dibenzofuran-3-ylboronic acid (4.8 g, 0.022 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.5 g, 0.0013 mol), and K2CO3 (7.1 g, 0.051 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 2 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A83-i. (9.9g, 70%) (4) Compound A83 [Reaction Equation 14-4] TIFF0007943889000073.tif42170

[0164] In a one-neck round-bottom flask, compound A83-i (10.0 g, 0.017 mol), compound C-1 (6.04 g, 0.018 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1 g, 0.0009 mol), and K2CO3 (4.7 g, 0.034 mol) were dissolved in a mixture of 1,4-dioxane (100 mL) and water (20 mL). The reaction was carried out under reflux at 110 °C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the compound A83 was obtained by filtration (10.8 g, 82.9%). 15. Synthesis of Compound A102 (1) Compound 102-ii [Reaction Equation 15-1] TIFF0007943889000074.tif40170

[0165] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.026 mol), dibenzothiophene-3-ylboronic acid (4.4 g, 0.020 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.5 g, 0.0013 mol), and K2CO3 (7.07 g, 0.051 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 3 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using methanol slurry, and the solution was filtered to obtain compound A102-ii. (8.8g, 64%) (2) Compound 102-i [Reaction Equation 15-2] TIFF0007943889000075.tif47170

[0166] In a one-neck round-bottom flask, compound A102-ii (8.8 g, 0.016 mol), 3-chlorophenylboronic acid (3.1 g, 0.020 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 0.9 g, 0.0008 mol), and K2CO3 (4.5 g, 0.032 mol) were dissolved in a mixture of 1,4-dioxane (100 mL) and water (20 mL). The reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A102-i (8.1 g, 80.7%). (3) Compound 102 [Reaction Equation 15-3] TIFF0007943889000076.tif52170

[0167] In a one-neck round-bottom flask, compound A102-i (8.1g, 0.013mol), compound C-1 (4.7g, 0.015mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 0.8g, 0.0007mol), and K2CO3 (3.6g, 0.026mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 8 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A102 (8.5g, 83.4%). 16. Synthesis of Compound 141 (1) Compound 141-ii [Reaction Equation 16-1] TIFF0007943889000077.tif39170

[0168] In a one-neck round-bottom flask, 9-(4,6-dichloro-1,3,5-triazine-2-yl)carbazole (10 g, 0.026 mol), [1,1'-biphenyl]-4-ylboronic acid (3.96 g, 0.020 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 1.5 g, 0.0013 mol), and K2CO3 (7.07 g, 0.051 mol) were dissolved in a mixture of tetrahydrofuran (100 mL) and water (20 mL), and the mixture was refluxed at 70°C for 3 hours. After cooling the reaction solution to room temperature, methanol was added in excess to completely precipitate the substance, and the solution was filtered. The precipitated substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The filtered solution was concentrated, impurities were removed using a methanol slurry, and the mixture was filtered to obtain compound A141-ii. (6.75 g, 67%) (2) Compound 141-i [Reaction Equation 16-2] TIFF0007943889000078.tif46170

[0169] In a one-neck round-bottom flask, compound A141-ii (6.75 g, 0.013 mol), 3-chlorophenylboronic acid (2.5 g, 0.016 mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 0.9 g, 0.0008 mol), and K2CO3 (4.5 g, 0.032 mol) were dissolved in a mixture of 1,4-dioxane (100 mL) and water (20 mL). The reaction was carried out under reflux at 110°C for 4 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the mixture was filtered to obtain compound A141-i (6.2 g, 82.1%). (3) Compound 141 [Reaction Equation 16-3] TIFF0007943889000079.tif52170

[0170] In a one-neck round-bottom flask, compound A141-i (6.2g, 0.0107mol), compound C-5 (4.7g, 0.015mol), palladium-tetrakis(triphenylphosphine) (Pd(PPh3)4, 0.8g, 0.0007mol), and K2CO3 (3.6g, 0.026mol) were dissolved in a 1,4-dioxane (100mL) / water (20mL) mixture, and the reaction was carried out under reflux at 110°C for 8 hours. After the reaction solution was sufficiently cooled to room temperature, the precipitated solid was filtered and thoroughly washed with water and methanol. The filtered substance was heated in DCB to completely dissolve it, and then filtered using chloroform and silica gel. The resulting solution was concentrated, impurities were removed using an acetone slurry, and the solution was filtered to obtain compound A141 (6.56g, 82.9%). The light-emitting material layer 230 may further include a second compound 234 represented by Chemical Formula 3.

[0171] [Chemical Formula 3] TIFF0007943889000080.tif78170

[0172] In Chemical Formula 3, each of c1 and c4 is an integer of 0 to 4, and c2 and c3 are each an integer of 0 to 3, R 11 , R 12 , R 13 , R 14 are each independently selected from the group consisting of deuterium, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C3-C30 cycloalkyl group, a substituted or unsubstituted C1-C10 alkoxy group, a substituted or unsubstituted C6-C60 aryl group, and a substituted or unsubstituted C3-C60 heteroaryl group, L 11 , L 12 are each independently selected from the group consisting of a single bond, a substituted or unsubstituted C6-C60 arylene group, and a substituted or unsubstituted C3-C60 heteroarylene group, Ar 11 , Ar 12 are each independently selected from the group consisting of a substituted or unsubstituted C6-C30 aryl group and a substituted or unsubstituted C3-C30 heteroaryl group.

[0173] In Chemical Formula 3, L 11 and L 12 may be a single bond, and Ar 11 , Ar 12 may each be a substituted or unsubstituted phenyl group. That is, Chemical Formula 3 may be represented by Chemical Formula 3a.

[0174] [Chemical Formula 3a] TIFF0007943889000081.tif94170

[0175] In Chemical Formula 3a, R 11 , R 12 , R13 , R 14 The definitions of c1, c2, c3, and c4 are the same as those defined in chemical formula 3. Ar 13 Ar 14 Each is a substituted or unsubstituted C6-C30 aryl group. c5 and c6 are independent integers between 0 and 5.

[0176] For example, in chemical formula 3a, Ar 13 Ar 14 Each of them may independently be phenyl, and each of c5 and c6 may independently be 0 or 1.

[0177] The second compound 234 may be any of the compounds of chemical formula 4.

[0178] [Chemical formula 4] TIFF0007943889000082.tif200170TIFF0007943889000083.tif130170

[0179] In the green pixel region, the light-emitting material layer 230 may further contain a third compound 236 selected from the compounds represented by chemical formula 5.

[0180] [Chemical formula 5] TIFF0007943889000084.tif92170

[0181] In the yellow-green pixel region, the light-emitting material layer 230 may further contain a third compound 236 selected from the compounds represented by chemical formula 6.

[0182] [Chemical formula 6] TIFF0007943889000085.tif93170

[0183] In the luminescent material layer 230, the first compound 232 may be an n-type host (first host), the second compound 234 may be a p-type host (second host), and the third compound 236 may be a luminescent dopant. The luminescent material layer 230 may have a thickness of 50 to 600 Å, for example, 200 to 400 Å.

[0184] In the luminescent material layer 230, the weight ratios of the first and second compounds 232 and 234, respectively, may be greater than the weight ratio of the third compound 236, and the first compound 232 and the second compound 234 may have the same or different weight ratios. In the luminescent material layer 230, the weight ratio of the first compound 232 and the second compound 234 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 232 and the second compound 234 may be the same. For example, the first compound 232 and the second compound 234 may have the same weight ratio, and the third compound 236 may be present in the luminescent material layer 230 at a concentration of 5 to 25 wt%.

[0185] The organic light-emitting layer 162 may further include an electron transporting layer 240 (ETL) located between the light-emitting material layer 230 and the second electrode 164. For example, the electron transporting layer 240 may be in contact with the light-emitting material layer 230. The electron transporting layer 240 may have substantially the same thickness as the light-emitting material layer 230. For example, the electron transporting layer 240 may have a thickness of 50 to 600 Å, for example, 200 to 400 Å.

[0186] The electron transport layer 240 may contain at least one of the compounds represented by chemical formula 7 (first electron transport substance), chemical formula 8 (second electron transport substance), and chemical formula 9 (third electron transport substance).

[0187] [Chemical formula 7] TIFF0007943889000086.tif59170

[0188] In chemical formula 7, L 21This is selected from the group consisting of single-bonded, substituted or unsubstituted C6-C60 arylene groups and substituted or unsubstituted C3-C60 heteroarylene groups. Ar 21 It is represented by chemical formula 7a or chemical formula 7b, Ar 22 Ar 23 Each is selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups.

[0189] [Chemical formula 7a] TIFF0007943889000087.tif28170

[0190] [Chemical formula 7b] TIFF0007943889000088.tif36170

[0191] In chemical formula 7a, d1 is an integer between 0 and 4. R 21 This is selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. R 22 Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. In chemical formula 7b, d² is an integer between 0 and 4. R 23This is selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. R 24 Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups.

[0192] In chemical formulas 7a and 7b, the parts marked with "*" are bonding sites.

[0193] In one embodiment of the present invention, Ar 22 Ar 23 Each of these may independently be an unsubstituted C6-C60 aryl group (e.g., phenyl or naphthyl) or a C1-C10 alkyl group (e.g., t-butyl) substituted with it.

[0194] [Chemical formula 8] TIFF0007943889000089.tif79170

[0195] In chemical formula 8, e1, e2, e3, and e4 are each independent integers between 0 and 4, and e5 is either 0 or 1. R 31 , R 32 , R 33 , R 34 Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. X1, X2, and X3 are each independently N or CR. 35 And at least two of X1, X2, and X3 are N. R 35 are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C6-C30 aryl group, and a substituted or unsubstituted C3-C30 heteroaryl group, Ar 31 , Ar 32 are each independently selected from the group consisting of a substituted or unsubstituted C6-C30 aryl group and a substituted or unsubstituted C3-C30 heteroaryl group, L 31 is selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group and a substituted or unsubstituted C3-C30 heteroarylene group.

[0196] In one embodiment of the present invention, each of e1, e2, e3, and e4 may independently be 0 or 1.

[0197] In one embodiment of the present invention, R 31 , R 32 , R 33 , R 34 may each independently be a substituted or unsubstituted C6-C30 aryl group (e.g., phenyl).

[0198] In one embodiment of the present invention, two of X1, X2 and X3 are N, and one of X1, X2 and X3 is CR 35 , and R 35 may be hydrogen.

[0199] In one embodiment of the present invention, Ar 31 , Ar 32 may each independently be a substituted or unsubstituted C6-C30 aryl group (e.g., phenyl, biphenyl).

[0200] In one embodiment of the present invention, L 31 may be a substituted or unsubstituted C6-C30 arylene group (e.g., phenylene).

[0201] [Chemical Formula 9] TIFF0007943889000090.tif68170

[0202] In Chemical Formula 9, f1, f2, and f3 are each an integer of 0 to 4, and f4 is an integer of 0 to 3, R 41 , R 42 , R 43 , R 44 are each independently selected from the group consisting of a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C3 to C10 cycloalkyl group, a substituted or unsubstituted C6 to C60 aryl group, and a substituted or unsubstituted C3 to C60 heteroaryl group, X 11 is O, S or NR 45 , R 45 is a substituted or unsubstituted C6 to C30 aryl group, and is connected to an adjacent benzene ring to form a ring, X 12 , X 13 , X 14 are each independently N or CR 46 , and at least 2 of X 12 , X 13 , X 14 are N, Ar 41 , Ar 42 , R 46 are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted C6 to C60 aryl group, and a substituted or unsubstituted C3 to C60 heteroaryl group, L 41 is selected from the group consisting of a single bond, a substituted or unsubstituted C6 to C60 arylene group, and a substituted or unsubstituted C3 to C60 heteroarylene group.

[0203] In one embodiment of the present invention, each of f1, f2, f3, and f4 may be 0.

[0204] In one embodiment of the present invention, R 45This is a phenyl group, which can bond with a nitrogen atom and an adjacent benzene ring to form a carbazole structure.

[0205] In one embodiment of the present invention, L 41 This may be a single bonded, substituted, or unsubstituted C6-C30 arylene group (e.g., phenylene).

[0206] In one embodiment of the present invention, Ar 41 Ar 42 Each may be a substituted or unsubstituted C6-C30 aryl group (e.g., phenyl, naphthyl, or naphthylphenyl).

[0207] In one embodiment of the present invention, R 46 It may be hydrogen.

[0208] The first electron transport substance of chemical formula 7 used in electron transport substance 282 may be one of the compounds represented by chemical formula 10.

[0209] [Chemical formula 10] TIFF0007943889000091.tif213170

[0210] The second electron transport material of chemical formula 8 used in electron transport material 282 may be one of the compounds shown in chemical formula 11.

[0211] [Chemical formula 11] TIFF0007943889000092.tif115170

[0212] The third electron transport material of chemical formula 9 used in electron transport material 282 may be one of the compounds represented by chemical formula 12.

[0213] [Chemical formula 12] TIFF0007943889000093.tif226170TIFF0007943889000094.tif55170

[0214] The organic light-emitting layer 162 may further include a hole transporting layer 220 (HTL) located between the first electrode 160 and the light-emitting material layer 230. The thickness of the hole transporting layer 220 may be greater than the thickness of the light-emitting material layer 230 and the electron transporting layer 240, respectively. The hole transporting layer 220 may have a thickness of 800 to 1200 Å, for example, 900 to 1100 Å.

[0215] Furthermore, the organic light-emitting layer 162 may further include at least one of the following: a hole injection layer 210 (HIL) located between the first electrode 160 and the hole transport layer 220, and an electron injection layer 250 (EIL) located between the second electrode 164 and the electron transport layer 240.

[0216] Although not shown in the figures, the organic light-emitting layer 162 may further include at least one of the following: an electron blocking layer (EBL) located between the hole transport layer 220 and the light-emitting material layer 230, and a hole blocking layer (HBL) located between the light-emitting material layer 230 and the electron transport layer 240.

[0217] The hole injection layer 210 contains 4,4',4''-tris(3-methylphenylamino)triphenylamine (MTDATA), 4,4',4''-tris(N,N-diphenyl-amino)triphenylamine (NATA), 4,4',4''-tris(N-(naphthalen-1-yl)-N-phenyl-amino)triphenylamine (1T-NATA), 4,4',4''-tris(N-(naphthalen-2-yl)-N-phenyl-amino)triphenylamine (2T-NATA), copper phthalocyanine (CuPc), tris(4-carbazoyl-9-yl-phenyl)amine (TCTA), and N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl The material may contain at least one compound from among phenyl-4,4''-diamine (NPB; NPD), 1,4,5,8,9,11-hexaazatriphenylenehexacarbonnitrile (dipyradino[2,3-f:2'3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonnitrile; HATCN), 1,3,5-tris[4-(diphenylamino)phenyl]benzene (TDAPB), poly(3,4-ethylenedioxythiophene)polystyrene sulfonic acid (PEDOT / PSS), and N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazole-3-yl)phenyl)-9H-fluoren-2-amine. The hole injection layer 210 may have a thickness of 10 to 100 Å, for example, 30 to 70 Å.

[0218] The hole transport layer 220 may comprise at least one compound selected from the group consisting of N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD), NPB (NPD), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly[N,N'-bis(4-butylphenyl)-N,N'-bis(phenyl)-benzidine] (poly-TPD), poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4'-(N-(4-sec-butylphenyl)diphenylamine))] (TFB), di-[4-(N,N-di-p-tolyl-amino)-phenyl]cyclohexane (TAPC), 3,5-di(9H-carbazol-9-yl)-N,N-diphenylaniline (DCDPA), N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, and N-(biphenyl-4-yl)-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)biphenyl-4-amine.

[0219] The electron injection layer 250 may comprise at least one selected from alkali metals such as Li, alkali halide-based materials such as LiF, CsF, NaF, BaF₂, and / or organometallic-based materials such as Liq, lithium benzoate, and sodium stearate. The electron injection layer 250 may have a thickness of 10 to 100 Å, for example, 30 to 70 Å.

[0220] The electron barrier layer consists of tris(4-carbazol-9-yl-phenyl)amine (TCTA), tris[4-(diethylamino)phenyl]amine, N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazole-3-yl)phenyl)-9H-fluoren-2-amine, di-[4-(N,N-di-p-tolyl-amino)-phenyl]cyclohexane (TAPC), 4,4',4''-tris(3-methylphenylamino)triphenylamine (MTDATA), 1,3-bis(carbazole-9-yl)benzene (mCP), 3,3'-bis( It may contain at least one of the following: N-carbazolyl)-1,1'-biphenyl (mCBP), copper phthalocyanine (CuPc), N,N'-bis[4-[bis(3-methylphenyl)amino]phenyl]-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (DNTPD), 1,3,5-tris[4-(diphenylamino)phenyl]benzene (TDAPB), 3,5-di(9H-carbazol-9-yl)-N,N-diphenylaniline (DCDPA), or 2,8-bis(9-phenyl-9H-carbazol-3-yl)dibenzo[b,d]thiophene.

[0221] The hole-blocking layer consists of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), bis(2-methyl-8-quinolinolato-N1,O8)-(1,1'-biphenyl-4-olato)aluminum (BAlq), tris-(8-hydroxyquinolinealuminum (Alq3), 2-biphenyl-4-yl-5-(4-t-butylphenyl)-1,3,4-oxadiazole (PBD), spiro-PBD, and Li q may contain at least one of the following: bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PYMPM), bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO), 9-(6-9H-carbazole-9-yl)pyridine-3-yl)-9H-3,9'-bicarbazole, or diphenyl-4-triphenylsilyl-phenylphosphine oxide (TSPO1).

[0222] As described above, in the organic light-emitting diode D located in at least one of the green pixel region and the yellow-green pixel region, the light-emitting material layer 230 contains the first compound 232, which is the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage decreases and the luminous efficiency increases in the organic light-emitting diode D.

[0223] Furthermore, in an organic light-emitting diode D located in at least one of the green pixel region and the yellow-green pixel region, the light-emitting material layer 230 further contains a second compound 234 as a second host represented by chemical formula 3, along with a first compound 232 as a first host, and has significant advantages in terms of driving voltage and luminous efficiency.

[0224] Furthermore, in the organic light-emitting diode D in the green pixel region, the light-emitting material layer 230 further contains a third compound 236, which is one of the compounds represented by chemical formula 5, as a dopant, along with the first compound 232 as the first host and the second compound 234 as the second host, and has significant advantages in terms of driving voltage and luminous efficiency.

[0225] Furthermore, in the organic light-emitting diode D in the yellow-green pixel region, the light-emitting material layer 230 further contains a third compound 236, which is one of the compounds represented by chemical formula 6, as a dopant, along with the first compound 232 as the first host and the second compound 234 as the second host, and has significant advantages in terms of driving voltage and luminous efficiency.

[0226] Furthermore, the organic light-emitting diode D located in at least one of the green pixel region and the yellow-green pixel region has significant advantages in terms of driving voltage and luminous efficiency by further including an electron transport layer 240 located between the light-emitting material layer 230 and the second electrode 164 as the negative electrode, which contains at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9.

[0227] [Organic Light-Emitting Diode] An organic light-emitting diode was fabricated by sequentially stacking the following layers on a positive electrode (ITO): a hole injection layer (compound of chemical formula 13, 50 Å), a hole transport layer (compound of chemical formula 14, 1000 Å), a green light-emitting material layer (first host, second host, dopant (compound GD1 of chemical formula 5), ​​15 wt%), 300 Å), an electron transport layer (compound ET2 of chemical formula 10, 300 Å), an electron injection layer (LiF, 50 Å), and a negative electrode (Al, 1000 Å).

[0228] [Chemical formula 13] TIFF0007943889000095.tif39170

[0229] [Chemical formula 14] TIFF0007943889000096.tif38170

[0230] 1. Comparative Example (1) Comparative Example 1 (Ref1) A green light-emitting material layer was formed using compound CF1 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (2) Comparative Example 2 (Ref2) A green light-emitting material layer was formed using compound CF2 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (3) Comparative Example 3 (Ref3) A green light-emitting material layer was formed using compound CF3 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (4) Comparative Example 4 (Ref4) A green light-emitting material layer was formed using compound CF4 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (5) Comparative Example 5 (Ref5) A green light-emitting material layer was formed using compound CF5 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (6) Comparative Example 6 (Ref6) A green light-emitting material layer was formed using compound CF6 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (7) Comparative Example 7 (Ref7) A green light-emitting material layer was formed using compound CF7 (chemical formula 15) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) [Chemical formula 15] TIFF0007943889000097.tif186170

[0231] 2. Experimental Examples (1) Experimental Example 1 (Ex1) A green light-emitting material layer was formed using compound A1 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (2) Experimental Example 2 (Ex2) A green light-emitting material layer was formed using compound A5 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (3) Experimental Example 3 (Ex3) A green light-emitting material layer was formed using compound A6 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (4) Experimental Example 4 (Ex4) A green light-emitting material layer was formed using compound A7 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (5) Experimental Example 5 (Ex5) A green light-emitting material layer was formed using compound A8 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (6) Experimental Example 6 (Ex6) A green light-emitting material layer was formed using compound A9 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (7) Experimental Example 7 (Ex7) A green light-emitting material layer was formed using compound A19 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (8) Experimental Example 8 (Ex8) A green light-emitting material layer was formed using compound A29 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (9) Experimental Example 9 (Ex9) A green light-emitting material layer was formed using compound A30 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (10) Experimental Example 10 (Ex10) A green light-emitting material layer was formed using compound A49 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (11) Experimental Example 11 (Ex11) A green light-emitting material layer was formed using compound A63 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (12) Experimental Example 12 (Ex12) A green light-emitting material layer was formed using compound A83 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (13) Experimental Example 13 (Ex13) A green light-emitting material layer was formed using compound A102 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (14) Experimental Example 14 (Ex14) A green light-emitting material layer was formed using compound A105 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (15) Experimental Example 15 (Ex15) A green light-emitting material layer was formed using compound A115 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (16) Experimental Example 16 (Ex16) A green light-emitting material layer was formed using compound A128 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (17) Experimental Example 17 (Ex17) A green light-emitting material layer was formed using compound A132 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (18) Experimental Example 18 (Ex18) A green light-emitting material layer was formed using compound A141 (chemical formula 2) as the first host and compound BCZ1 (chemical formula 4) as the second host. (First host:Second host = 1:1) (19) Experimental Examples 19 to 36 (Ex19 to Ex36) In Experimental Examples 1 to 18, compound BCZ2 with chemical formula 4 was used instead of compound BCZ1 with chemical formula 4, which was used as the second host.

[0232] The characteristics (driving voltage ΔV, luminous efficiency) of the organic light-emitting diodes for Comparative Examples 1 and 7, and Experimental Examples 1 to 36 were measured and are listed in Tables 1 to 3.

[0233] [Table 1]

[0234] [Table 2]

[0235] [Table 3]

[0236] As can be seen from Tables 1 to 3, compared to the organic light-emitting diodes of Comparative Examples 1 to 7, the organic light-emitting diodes of Experimental Examples 1 to 36, in which the green light-emitting material layer contains the organic compound of the present invention, have advantages in terms of driving voltage and luminous efficiency.

[0237] Furthermore, as shown in Experimental Examples 15, 16, 18, 33, 34, and 36, when the organic compound of the present invention is represented by chemical formula 1-3 or chemical formula 1-4, where Ar2 is chemical formula 1b-1, L1 is phenylene, and Ar1 is phenyl, the driving voltage of the organic light-emitting diode decreases significantly and the luminous efficiency increases significantly.

[0238] 3. Comparative Examples 8 to 19 (Ref8 to Ref19) A green light-emitting material layer was formed using compounds CF8 to CF19 (each with chemical formula 16) as the first host and compound BCZ1 (with chemical formula 4) as the second host. (First host:Second host = 1:1) [Chemical formula 16] TIFF0007943889000101.tif208170TIFF0007943889000102.tif203170

[0239] The characteristics (driving voltage ΔV, luminous efficiency, and lifetime) of the organic light-emitting diodes for Comparative Example 1, Comparative Example 8, Comparative Example 19, and Experimental Example 1 were measured and are listed in Table 4.

[0240] [Table 4]

[0241] As can be seen from Table 4, compared to the organic light-emitting diodes of Comparative Examples 1 and 8 to 19, the organic light-emitting diode of Experimental Example 1, in which the green light-emitting material layer contains the organic compound of the present invention, has advantages in terms of driving voltage, luminous efficiency, and lifespan.

[0242] For example, while compounds CF8 to CF19 used in Comparative Examples 8 to 19 differ from compound A1 of the present invention only in the substituent at the benzoxazole terminus, the luminescence characteristics of the organic light-emitting diode in Example 1, which uses compound A1 of the present invention in which a phenyl group is bonded to the benzoxazole terminus, are greatly improved.

[0243] 4. Comparative Examples 20 to 31 (Ref20 to Ref31) A green light-emitting material layer was formed using compounds CF20 to CF31 (each with chemical formula 17) as the first host, and compound BCZ1 (with chemical formula 4) as the second host. (First host:Second host = 1:1) [Chemical formula 17] TIFF0007943889000104.tif221170TIFF0007943889000105.tif195170TIFF0007943889000106.tif81170

[0244] The characteristics (driving voltage ΔV, luminous efficiency, and lifetime) of the organic light-emitting diodes for Comparative Example 1, Comparative Example 20, Comparative Example 31, and Experimental Example 11 were measured and are listed in Table 5.

[0245] [Table 5]

[0246] As can be seen from Table 5, the organic light-emitting diode of Experimental Example 11, in which the green light-emitting material layer contains the organic compound of the present invention, has advantages in terms of driving voltage, luminous efficiency, and lifespan compared to the organic light-emitting diodes of Comparative Examples 1 and 20 to 31.

[0247] For example, while compounds CF20 to CF31 used in Comparative Examples 20 to 31 differ from compound A63 of the present invention only in the substituent at the benzoxazole terminus, the luminescence characteristics of the organic light-emitting diode in Example 11, which uses compound A63 of the present invention in which a phenyl group is bonded to the benzoxazole terminus, are greatly improved.

[0248] 5. Comparative Examples 32-37 (Ref32-Ref37) A green light-emitting material layer was formed using compounds CF32 to CF37 (with chemical formula 18) as the first host and compound BCZ1 (with chemical formula 4) as the second host. (First host:Second host = 1:1) [Chemical formula 18] TIFF0007943889000108.tif179170

[0249] The characteristics (driving voltage ΔV, luminous efficiency, and lifetime) of the organic light-emitting diodes for Comparative Example 1, Comparative Example 32, Comparative Example 37, and Experimental Example 11 were measured and are listed in Table 6.

[0250] [Table 6]

[0251] As can be seen from Table 6, compared to the organic light-emitting diodes of Comparative Examples 1 and 32 to 37, the organic light-emitting diode of Experimental Example 11, in which the green light-emitting material layer contains the organic compound of the present invention, has advantages in terms of driving voltage, luminous efficiency, and lifespan.

[0252] For example, while compound CF32 used in Comparative Example 32 and compound A63 of the present invention differ only in the binding positions of the carbazole moiety and the triazine moiety, the organic light-emitting diode of Example 11, which uses compound A63 of the present invention having a structure in which the triazine moiety is bound to the 3rd position of the carbazole moiety, shows a significant decrease in driving voltage and a significant improvement in luminous efficiency.

[0253] Furthermore, compared to Comparative Examples 33 to 37, which use compounds CF33 to CF37 in which a triazine moiety is bonded at the 2nd position of the carbazole moiety and an aryl group of 10 or more Cs is bonded to the benzoxazole terminus, the organic light-emitting diode of Example 11, which uses compound A63 of the present invention having a structure in which a triazine moiety is bonded at the 3rd position of the carbazole moiety and a phenyl group is bonded to the benzoxazole terminus, shows a significant improvement in luminous efficiency and lifetime.

[0254] Figure 4 is a schematic cross-sectional view of an organic light-emitting diode according to a third embodiment of the present invention.

[0255] As shown in Figure 4, the organic light-emitting diode D includes first and second electrodes 160 and 164 facing each other, and an organic light-emitting layer 162 located between the first and second electrodes 160 and 164. The organic light-emitting layer 162 includes a first light-emitting section 310 including a first light-emitting material layer 320, and a second light-emitting section 330 including a second light-emitting material layer 340. The organic light-emitting layer 162 may further include a charge-generating layer 350 located between the first light-emitting section 310 and the second light-emitting section 330.

[0256] The first electrode 160 is an anode for injecting holes and may be made of a conductive material with a high work function, such as ITO or IZO, and the second electrode 164 is a cathode for injecting electrons and may be made of a conductive material with a low work function, such as any one of aluminum (Al), magnesium (Mg), or aluminum-magnesium alloy (AlMg).

[0257] If the organic light-emitting diode D is an upper-emitting type, the first electrode 160 further includes a reflective layer and acts as a reflective electrode, and the second electrode 164 has a thin thickness and can act as a transmissive electrode (semitransmissive electrode). Alternatively, if the organic light-emitting diode D is a lower-emitting type, the first electrode 160 can act as a transmissive electrode, and the second electrode 164 can act as a reflective electrode.

[0258] The charge generation layer 350 is located between the first and second light-emitting sections 310 and 330, and the first light-emitting section 310, the charge generation layer 350, and the second light-emitting section 330 are sequentially stacked on the first electrode 160. That is, the first light-emitting section 310 is located between the first electrode 160 and the charge generation layer 350, and the second light-emitting section 330 is located between the second electrode 164 and the charge generation layer 350.

[0259] The first light-emitting section 310 may further include a first electron transport layer 316 located between the first light-emitting material layer 320 and the second light-emitting section 330. For example, the first electron transport layer 316 may be located between the first light-emitting material layer 320 and the charge generation layer 350.

[0260] Furthermore, the first light-emitting section 310 may further include at least one of the following: an electron injection layer 312 located between the first light-emitting material layer 320 and the first electrode 160, and a first hole transport layer 314 located between the first light-emitting material layer 320 and the electron injection layer 312.

[0261] Furthermore, the first light-emitting section 310 may include at least one of the following: a first electron-blocking layer (not shown) located between the first hole transport layer 314 and the first light-emitting material layer 320, and a first hole-blocking layer (not shown) located between the first light-emitting material layer 320 and the first electron transport layer 316.

[0262] The second light-emitting section 330 may further include a second electron transport layer 334 located between the second light-emitting material layer 340 and the second electrode 164.

[0263] Furthermore, the second light-emitting section 330 may further include at least one of a second hole transport layer 332 located below the second light-emitting material layer 340 and an electron injection layer 336 located between the second electron transport layer 334 and the second electrode 164.

[0264] Furthermore, the second light-emitting section 330 may include at least one of the following: a second electron-blocking layer (not shown) located between the second hole transport layer 332 and the second light-emitting material layer 340, and a second hole-blocking layer (not shown) located between the second light-emitting material layer 340 and the second electron transport layer 334.

[0265] The charge generation layer 350 is located between the first light-emitting section 310 and the second light-emitting section 330. That is, the first light-emitting section 310 and the second light-emitting section 330 are connected by the charge generation layer 350. The charge generation layer 350 may be a PN junction charge generation layer in which an N-type charge generation layer 352 and a P-type charge generation layer 354 are joined together.

[0266] The N-type charge generation layer 352 is located between the first electron barrier layer 318 and the second hole transport layer 332, and the P-type charge generation layer 354 is located between the N-type charge generation layer 352 and the second hole transport layer 332.

[0267] The N-type charge generation layer 352 may be an organic layer doped with alkali metals such as Li, Na, K, and Cs and / or alkaline litho metals such as Mg, Sr, Ba, and Ra. For example, the N-type charge generation layer 382 consists of an N-type charge generation material comprising a host which is an organic substance such as 4,7-diphenyl-1,10-phenanthroline (Bphen), MTDATA, and a dopant which is an alkali metal or alkaline earth metal, and the dopant may be doped in an amount of 0.01 to 30% by weight.

[0268] The P-type charge generation layer 354 may consist of a P-type charge generation material comprising an inorganic substance selected from the group consisting of tungsten oxide (WOx), molybdenum oxide (MoOx), beryllium oxide (Be2O3), vanadium oxide (V2O5) and combinations thereof, and an organic substance selected from the group consisting of NPD, HAT-CN, F4TCNQ, TPD, TNB, TCTA, N,N'-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) and combinations thereof.

[0269] The first light-emitting material layer 320 contains the first compound 322, the second compound 324, and the third compound 326, and the second green light-emitting material layer 340 contains the fourth compound 342, the fifth compound 344, and the sixth compound 346.

[0270] At least one of the first compound 322 and the fourth compound 342 is the organic compound of the present invention represented by chemical formula 1, and at least one of the second compound 324 and the fifth compound 344 is the compound represented by chemical formula 3.

[0271] The first light-emitting material layer 320 and the second light-emitting material layer 340 are green light-emitting material layers or yellow-green light-emitting material layers. That is, the organic light-emitting diode D is located in the green pixel region or the yellow-green pixel region.

[0272] In the green pixel region, the third compound 326 and the sixth compound 346 are each selected from the compounds shown in chemical formula 5. In the yellow-green pixel region, the third compound 326 and the sixth compound 346 are each selected from the compounds shown in chemical formula 5.

[0273] In the yellow-green pixel region, the third compound 326 and the sixth compound 346 are each selected from the compounds shown in chemical formula 5. In the yellow-green pixel region, the third compound 326 and the sixth compound 346 are each selected from the compounds shown in chemical formula 6.

[0274] In the first luminescent material layer 320, the first compound 322 may be an n-type host (first host), the second compound 324 may be a p-type host (second host), and the third compound 326 may be a luminescent dopant. In the second luminescent material layer 340, the fifth compound 352 may be an n-type host (first host), the fifth compound 344 may be a p-type host (second host), and the sixth compound 346 may be a luminescent dopant. The first and second luminescent material layers 320 and 340 may each have a thickness of 50 to 600 Å.

[0275] If the first compound 322 and the fourth compound 342 are organic compounds of the present invention represented by chemical formula 1, then the first compound 322 and the fourth compound 342 may be the same or different from each other. If the second compound 324 and the fifth compound 344 are compounds represented by chemical formula 3, then the second compound 324 and the fifth compound 344 may be the same or different from each other. If the third compound 326 and the sixth compound 346 are compounds of chemical formula 5, then the third compound 326 and the sixth compound 346 may be the same or different from each other. If the third compound 326 and the sixth compound 346 are compounds of chemical formula 6, then the third compound 326 and the sixth compound 346 may be the same or different from each other.

[0276] In the first light-emitting material layer 320, the weight ratios of the first and second compounds 322 and 324, respectively, may be greater than the weight ratio of the third compound 326, and the first compound 322 and the second compound 324 may have the same or different weight ratios. In the first light-emitting material layer 320, the weight ratio of the first compound 322 and the second compound 324 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 322 and the second compound 324 may be the same. For example, the first compound 322 and the second compound 324 may have the same weight ratio, and the third compound 326 may be present in the first light-emitting material layer 320 at a concentration of 5 to 25 wt%.

[0277] In the second light-emitting material layer 340, the weight ratios of the fourth and fifth compounds 342 and 344, respectively, may be greater than the weight ratio of the sixth compound 346, and the fourth compound 342 and the fifth compound 344 may have the same or different weight ratios. In the second light-emitting material layer 340, the weight ratio of the fourth compound 342 and the fifth compound 344 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the fourth compound 342 and the fifth compound 344 may be the same. For example, the fourth compound 342 and the fifth compound 344 may have the same weight ratio, and the sixth compound 346 may be present in the second light-emitting material layer 340 at a concentration of 5 to 25 wt%.

[0278] Each of the first and second electron transport layers 316 and 324 may contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9.

[0279] In an organic light-emitting diode D located in at least one of the green pixel region and the yellow-green pixel region, the first light-emitting material layer 320 and the second light-emitting material layer 340 each contain the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage decreases and the luminous efficiency increases in the organic light-emitting diode D.

[0280] Furthermore, the first light-emitting material layer 320 and the second light-emitting material layer 340 each contain, along with the first host which is the organic compound of the present invention, a compound represented by chemical formula 3 as a second host, and have significant advantages in terms of driving voltage and luminous efficiency.

[0281] Furthermore, the first light-emitting material layer 320 and the second light-emitting material layer 340 each contain a first host, which is a compound of chemical formula 1, and a second host, which is a compound of chemical formula 3, as well as a light-emitting element (dopant) which is a compound represented by chemical formula 5 or chemical formula 6, and have significant advantages in terms of driving voltage and luminous efficiency.

[0282] Furthermore, in the organic light-emitting diode D located in at least one of the green pixel region and the yellow-green pixel region, if at least one of the first electron transport layer 316 and the second electron transport layer 334 contains at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9, it has significant advantages in terms of driving voltage and luminous efficiency.

[0283] Figure 5 is a schematic cross-sectional view of an organic light-emitting display device according to a fourth embodiment of the present invention.

[0284] As shown in Figure 5, the organic light-emitting display device 400 includes a first substrate 410 in which a red pixel region RP, a green pixel region GP, ​​and a blue pixel region BP are defined; a second substrate 470 facing the first substrate 410; an organic light-emitting diode D located between the first substrate 410 and the second substrate 470 that emits white light; and a color filter layer 480 located between the organic light-emitting diode D and the second substrate 470.

[0285] The first substrate 410 and the second substrate 470 may each be a glass substrate or a flexible substrate. For example, the flexible substrate may be any one of the following: a polyimide (PI) substrate, a polyethersulfone (PES) substrate, a polyethylene naphthalate (PEN) substrate, a polyethylene terephthalate (PET) substrate, and a polycarbonate (PC) substrate.

[0286] A buffer layer 420 is formed on the first substrate 410, and thin-film transistors Tr are formed on the buffer layer 420 corresponding to the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, respectively. The buffer layer 420 may be made of an inorganic insulating material such as silicon oxide or silicon nitride. The buffer layer 420 may also have a multilayer structure by including a first layer made of silicon oxide and a second layer made of silicon nitride. The buffer layer 420 may be omitted.

[0287] A semiconductor layer 422 is formed on the buffer layer 420. The semiconductor layer 422 may be made of an oxide semiconductor material or polycrystalline silicon.

[0288] A gate insulating film 424 made of an insulating material is formed on the upper part of the semiconductor layer 422. The gate insulating film 424 may be made of an inorganic insulating material such as silicon oxide or silicon nitride.

[0289] A gate electrode 430, made of a conductive material such as metal, is formed on top of the gate insulating film 424, corresponding to the center of the semiconductor layer 422.

[0290] An interlayer insulating film 432 made of an insulating material is formed on the upper part of the gate electrode 430. The interlayer insulating film 432 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride, or of an organic insulating material such as benzocyclobutene or photo-acrylic.

[0291] The interlayer insulating film 432 has first and second contact holes 434 and 436 that expose both sides of the semiconductor layer 422. The first and second contact holes 434 and 436 are located on both sides of the gate electrode 430, spaced apart from the gate electrode 430.

[0292] A source electrode 440 and a drain electrode 442, made of a conductive material such as metal, are formed on the interlayer insulating film 432.

[0293] The source electrode 440 and the drain electrode 442 are positioned spaced apart from the gate electrode 430 and contact both sides of the semiconductor layer 422 via first and second contact holes 434 and 436, respectively.

[0294] The semiconductor layer 422, gate electrode 430, source electrode 440, and drain electrode 442 constitute the thin-film transistor Tr, and the thin-film transistor Tr functions as a driving element.

[0295] Although not shown in the diagram, gate wiring and data wiring intersect to define the pixel region, and switching elements are further formed that are connected to the gate wiring and data wiring. The switching elements are connected to thin-film transistors Tr, which act as driving elements.

[0296] Furthermore, power wiring may be formed parallel to or separated from data wiring, and a storage capacitor may be configured to maintain a constant voltage at the gate electrode of a thin-film transistor Tr acting as a driving element during one frame.

[0297] A planarization layer 450 is formed covering the thin-film transistor Tr, having a drain contact hole 452 that exposes the drain electrode 442 of the thin-film transistor Tr.

[0298] On the planarization layer 450, first electrodes 460 are formed separately for each pixel region, connected to the drain electrode 442 of the thin-film transistor Tr via drain contact holes 452. The first electrodes 460 may be anodes and may include a transparent conductive oxide layer made of a conductive material with a relatively large work function value, such as transparent conductive oxide (TCO).

[0299] For example, the transparent conductive oxide layer of the first electrode 460 may contain at least one of the following: indium-tin oxide (ITO), indium-zinc oxide (IZO), indium-tin-zinc oxide (ITZO), tin oxide (SnO), zinc oxide (ZnO), indium-copper oxide (ICO), and aluminum:zinc oxide (Al:ZnO;AZO).

[0300] The first electrode 460 may further include a reflective layer. For example, the reflective layer may be made of silver (Ag) or an aluminum-palladium-copper (APC) alloy. In the top-emitting type organic light-emitting display device 400, the first electrode 460 may have a triple-layer structure of ITO / Ag / ITO or ITO / APC / ITO.

[0301] A bank layer 466 is formed on the planarization layer 450, covering the ends of the first electrode 460. The bank layer 466 exposes the center of the first electrode 460, corresponding to the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP. Since the organic light-emitting diode D emits white light in the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, the light-emitting layer 462 may be formed as a common layer without needing to be separated from the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP. The bank layer 466 is formed to prevent current leakage at the ends of the first electrode 460, and the bank layer 466 may be omitted.

[0302] An organic light-emitting layer 462 is formed on the first electrode 460.

[0303] In one embodiment of the present invention, the organic light-emitting layer 462 may have a three-stack structure by including a first light-emitting section containing a green light-emitting material layer and a yellow-green light-emitting material layer, and second and third light-emitting sections, each containing a blue light-emitting material layer.

[0304] In one embodiment of the present invention, the organic light-emitting layer 462 may have a two-stack structure by including a second light-emitting section containing a green light-emitting material layer or a yellow-green light-emitting material layer, and a second light-emitting section containing a blue light-emitting material layer.

[0305] In this case, at least one of the green light-emitting material layer and the yellow-green light-emitting material layer contains the organic compound of the present invention.

[0306] A second electrode 464 is formed on the upper part of the first substrate 410 on which the organic light-emitting layer 462 is formed.

[0307] In the organic light-emitting display device 400 of the present invention, light emitted from the organic light-emitting layer 462 is incident on the color filter layer 480 via the second electrode 464, so the second electrode 464 has a thin thickness so that light can be transmitted.

[0308] The first electrode 460, the organic light-emitting layer 462, and the second electrode 464 constitute an organic light-emitting diode D.

[0309] The color filter layer 480 is located on top of the organic light-emitting diode D and includes a red color filter pattern 482, a green color filter pattern 484, and a blue color filter pattern 486, corresponding to the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, respectively. The red color filter pattern 482 may include at least one of a red dye and a red pigment, the green color filter pattern 484 may include at least one of a green dye and a green pigment, and the blue color filter pattern 485 may include at least one of a blue dye and a blue pigment.

[0310] Although not shown in the diagram, the color filter layer 480 may be attached to the organic light-emitting diode D by an adhesive layer. Alternatively, the color filter layer 480 may be formed directly on top of the organic light-emitting diode D.

[0311] Although not shown in the diagram, an encapsulation film may be formed to prevent external moisture from penetrating the organic light-emitting diode D. For example, the encapsulation film may have, but is not limited to, a laminated structure comprising a first inorganic insulating layer and an organic insulating layer and a second inorganic insulating layer.

[0312] Furthermore, a polarizing plate may be attached to the outer surface of the second substrate 470 to reduce external light reflection. For example, the polarizing plate may be a circular polarizing plate.

[0313] In the organic light-emitting device 400 shown in Figure 5, the first electrode 460 is a reflective electrode, the second electrode 464 is a transmissive (semitransmissive) electrode, and the color filter layer 480 is positioned on top of the organic light-emitting diode D. Alternatively, the first electrode 460 may be a transmissive (semitransmissive) electrode, and the second electrode 464 may be a reflective electrode. In this case, the color filter layer 480 may be positioned between the organic light-emitting diode D and the first substrate 410.

[0314] Furthermore, a color conversion layer (not shown) may be provided between the organic light-emitting diode D and the color filter layer 480. The color conversion layer includes a red color conversion layer, a green color conversion layer, and a blue color conversion layer corresponding to each pixel region, and can convert the white light from the organic light-emitting diode D into red, green, and blue, respectively. For example, the color conversion layer may include quantum dots. Therefore, the color purity of the organic light-emitting display device 400 can be further improved.

[0315] Alternatively, a color conversion layer may be included instead of the color filter layer 480.

[0316] As described above, in the organic light-emitting display device 400, the organic light-emitting diodes D in the red pixel region RP, green pixel region GP, ​​and blue pixel region BP emit white light, and the light from the organic light-emitting diodes D passes through the red color filter pattern 482, the green color filter pattern 484, and the blue color filter pattern 486, so that green, red, and blue are displayed in the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, respectively.

[0317] In Figure 5, a white-emitting organic light-emitting diode D is used in a display device. Alternatively, the organic light-emitting diode D may be formed on the front surface of a substrate without a driving element such as a thin-film transistor Tr and a color filter layer 480, and used in a lighting device. In the present invention, the organic light-emitting device includes a display device and a lighting device.

[0318] Figure 6 is a schematic cross-sectional view of an organic light-emitting diode according to a fifth embodiment of the present invention.

[0319] Referring to Figure 6, the organic light-emitting layer 462 includes a first light-emitting section 530 containing a green light-emitting material layer 510a, a second light-emitting section 540 containing a first blue light-emitting material layer 550, and a third light-emitting section 560 containing a second blue light-emitting material layer 570. The organic light-emitting layer 462 may further include a first charge generation layer 580 located between the first light-emitting section 530 and the second light-emitting section 540, and a second charge generation layer 590 located between the first light-emitting section 530 and the third light-emitting section 560. The first light-emitting section 530 may further include a red light-emitting material layer 510b.

[0320] The second light-emitting section 540 is located between the first electrode 460 and the first light-emitting section 530, and the third light-emitting section 560 is located between the first light-emitting section 530 and the second electrode 464. Furthermore, the second light-emitting section 540 is located between the first electrode 460 and the first charge generation layer 580, and the third light-emitting section 560 is located between the second charge generation layer 590 and the second electrode 464. In other words, the second light-emitting section 540, the first charge generation layer 580, the first light-emitting section 530, the second charge generation layer 590, and the third light-emitting section 560 are sequentially stacked on the first electrode 460.

[0321] In the first light-emitting section 530, the red light-emitting material layer 510b may be located below the green light-emitting material layer 510a.

[0322] The first light-emitting section 530 may further include a first electron transport layer 534 located above the green light-emitting material layer 510a. The first light-emitting section 530 may further include a first hole transport layer 532 located below the red light-emitting material layer 510b.

[0323] For example, in the first light-emitting section 530, the red light-emitting material layer 510b may be located between the first hole transport layer 532 and the green light-emitting material layer 510a, and the green light-emitting material layer 510a may be located between the red light-emitting material layer 510b and the first electron transport layer 534.

[0324] The second light-emitting section 540 may further include at least one of a second hole transport layer 544 located below the first blue light-emitting material layer 550 and a second electron transport layer 546 located above the first blue light-emitting material layer 550. The second light-emitting section 540 may further include a hole injection layer 542 located between the first electrode 460 and the second hole transport layer 544.

[0325] Furthermore, the second light-emitting section 540 may further include at least one of a first electron-blocking layer (not shown) located between the second hole transport layer 544 and the first blue light-emitting material layer 550, and a first hole-blocking layer (not shown) located between the second electron transport layer 546 and the first blue light-emitting material layer 550.

[0326] The third light-emitting section 560 may further include at least one of a third hole transport layer 562 located below the second blue light-emitting material layer 570 and a third electron transport layer 564 located above the second blue light-emitting material layer 570. The third light-emitting section 560 may further include an electron injection layer 566 located between the second electrode 460 and the third electron transport layer 564.

[0327] Furthermore, the third light-emitting section 560 may further include at least one of a second electron-blocking layer (not shown) located between the third hole transport layer 562 and the second blue light-emitting material layer 570, and a second hole-blocking layer (not shown) located between the third electron transport layer 564 and the second blue light-emitting material layer 570.

[0328] The green light-emitting material layer 510a contains a first compound 512, which is an organic compound of the present invention represented by chemical formula 1. The green light-emitting material layer 510a may further contain a second compound 514, which is represented by chemical formula 3. The green light-emitting material layer 510a may further contain a third compound 516, which is selected from the compounds of chemical formula 5.

[0329] In the green light-emitting material layer 510a, the first compound 512 may be an n-type host (first host), the second compound 514 may be a p-type host (second host), and the third compound 516 may be a light-emitting material (dopant). The green light-emitting material layer 510a may have a thickness of 50 to 600 Å.

[0330] In the green light-emitting material layer 510a, the weight ratios of the first and second compounds 512 and 514, respectively, may be greater than the weight ratio of the third compound 516, and the first compound 512 and the second compound 514 may have the same or different weight ratios. In the green light-emitting material layer 510a, the weight ratio of the first compound 512 and the second compound 514 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 512 and the second compound 514 may be the same. For example, the first compound 512 and the second compound 514 may have the same weight ratio, and the third compound 516 may be present in 5 to 25 wt% of the green light-emitting material layer 510a.

[0331] Each of the first to third electron transport layers 534, 546, and 564 may contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9.

[0332] The red light-emitting material layer 510b may contain a red host and a red dopant. The red dopant may contain at least one of a red phosphorescent compound, a red fluorescent compound, and a red delayed fluorescent compound. In the red light-emitting material layer 510b, the red host may have a larger weight ratio than the red dopant. In the red light-emitting material layer 510b, the red dopant may be doped in an amount of 1 to 10 wt%, for example, 1 to 5 wt%.

[0333] For example, the red host is 9,9'-diphenyl-9H,9'H-3,3'-bicarbazole (BCzPh), CBP, 1,3,5-tris(carbazole-9-yl)benzene (TCP), TCTA, 4,4'-bis(carbazole-9-yl)-2,2'-dimethylbiphenyl (CDBP), 2,7-Bis(carbazole-9-yl)-9,9-dimethylfluorene (DMFL-CBP), 2,2',7,7'-Tetrakis(carbazole-9-yl)-9,9-spiorofluorene (Spior-CBP), DPEPO, 4'-(9H-carbazole-9-yl)biphenyl-3,5-dicarbonitrile (4'-(9 H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile;PCzB-2CN), 3'-(9H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile (3'-(9H-carbazol-9-yl)biphenyl-3,5-dicarbonitrile;mCzB-2CN), 3,6-bis(carbazol-9-yl)-9-(2-ethyl-hexyl)-9H-carbazol (3,6-Bis(carbazole-9-yl)-9-(2-ethyl-hexyl)-9H-carb A selection can be made from the group consisting of azole (TCz1), bis(2-hydroxylphenyl)-pyridine)beryllium (Bepp2), bis(10-hydroxylbenzo[h]quinolinato)beryllium (Bebq2), and 1,3,5-tris(1-pyrenyl)benzene (TPB3). However, it is not limited to these.

[0334] Additionally, the red dopants are [Bis(2-(4,6-dimethyl)phenylquinoline)](2,2,6,6-tetramethylheptane-3,5-dionate)iridium(III) ([Bis(2-(4,6-dimethyl)phenylquinoline)](2,2,6,6-tetramethylheptane-3,5-dionate)iridium(III) (Bis[ 2-(4-n-hexylphenyl)quinoline](acetylacetonate)iridium(III);Hex-Ir(phq)2(acac)), Tris[2-(4-n-hexylphenyl)quinoline]iridium(III) (Tris[2-(4-n-hexylphenyl)quinoline]iridium(III,Hex-Ir(phq)3), Tris[2-phenyl-4-methylquinoline]iridium(III) (Tris[2-phenyl -4-methylquinoline]iridium(III), Ir(Mphq)3), bis(2-phenylquinoline)(2,2,6,6-tetramethylheptene-3,5-dionate)iridium(III), Ir(dpm)PQ2), bis(phenylisoquinoline)(2,2,6,6-tetramethylheptene-3, 5-Dionet) Iridium(III) (Bis(phenylisoquinoline)(2,2,6,6-tetramethylheptene-3,5-dionate)iridium(III), Ir(dpm)(piq)2), Bis[(4-n-hexylphenyl)isoquinoline](acetylacetonate)iridium(III) (Bis[(4-n-hexylphenyl)isoquinoline](acetylacetonate)iridium(III);Hex-Ir(piq)2(acac)), Tris[2-(4-n-hexylphenyl)quinoline]iridium(III), Hex-Ir(piq)3, Tris(2-(3-methylphenyl)-7-methyl-quinolato)iridium;Ir(dmpq)3, Bis[2-(2-methylphenyl)-7-methyl-quinoline](acetylacetonate)iridium The following can be selected from the group consisting of (III)(Bis[2-(2-methylphenyl)-7-methyl-quinoline](acetylacetonate)iridium(III);Ir(dmpq)2(acac)) and bis[2-(3,5-dimethylphenyl)-4-methyl-quinoline](acetylacetonate)iridium(III)(Bis[2-(3,5-dimethylphenyl)-4-methyl-quinoline](acetylacetonate)iridium(III);Ir(mphmq)2(acac)). However, it is not limited to this.

[0335] The first blue light-emitting material layer 550 of the second light-emitting section 540 includes a first blue host and a first blue dopant, and the second blue light-emitting material layer 570 of the third light-emitting section 560 includes a second blue host and a second blue dopant.

[0336] The first and second blue dopants may each contain at least one of a blue phosphorescent compound, a blue fluorescent compound, or a blue delayed fluorescent compound. In the first blue light-emitting material layer 550, the first blue host may have a larger weight ratio than the first blue dopant. In the second blue light-emitting material layer 570, the second blue host may have a larger weight ratio than the second blue dopant. In the first and second blue light-emitting material layers 550 and 570, respectively, the first and second blue dopants may be doped in a content of 1 to 10 wt%, for example, 1 to 5 wt%.

[0337] For example, the first and second blue hosts are mCP, 9-(3-(9H-carbazol-9-yl)phenyl)-9H-carbazol-3-carbonitrile (mCP-CN), mCBP, CBP-CN, 9-(3-(9H-carbazol-9-yl)phenyl)-3-(diphenylphosphoryl)-9H-carbazol (mCPPO1), 3,5-di(9H-carbazol-9-yl)biphenyl (Ph-mCP), TSPO1, 9-(3'-(9H-carbazol-9-yl)-[1,1'-biphenyl]- The following can be selected from the group consisting of 3-yl)-9H-pyrido[2,3-b]indole (CzBPCb), bis(2-methylphenyl)diphenylsilane (UGH-1), 1,4-bis(triphenylsilyl)benzene (UGH-2), 1,3-bis(triphenylsilyl)benzene (UGH-3), 9,9-spirobifluoren-2-yl-diphenylphosphine oxide (SPPO1), and 9,9'-(5-(triphenylsilyl)-1,3-phenylene)bis(9H-carbazole) (SimCP). However, it is not limited to these.

[0338] The first and second blue dopants are, independently, perylene, 4,4'-bis[4-(di-p-tolylamino)styryl]biphenyl (DPAVBi), 4-(di-p-tolylamino)-4-4'-[(di-p-tolylamino)styryl]stilbene (DPAVB), 4,4'-bis[4-(diphenylamino)styryl]biphenyl (BDAVBi), and 2,7-bis(4-diphenylamino)styryl)-9,9-s Pyrofluorene (spiro-DPVBi), [1,4-bis[2-[4-[N,N-di(p-tolyl)amino]phenyl]vinyl]benzene (DSB), 1-4-di-[4-(N,N-diphenyl)amino]styryl-benzene (DSA), 2,5,8,11-tetra-tert-butylperylene (TBPe), bis(2-hydroxylphenyl)-pyridine)beryllium (Bepp2), 9-(9-phenylcarbazo (3-yl)-10-(naphthalene-1-yl)anthracene (PCAN), mer-tris(1-phenyl-3-methylimidazoline-2-ylidene-C,C(2)'iridium(III)(mer-Ir(pmi)3), fac-tris(1,3-diphenyl-benzimidazolin-2-ylidene-C,C(2)'iridium(III)(fac-Ir(dpbic)3), bis(3,4,5-trifluoro-2- The following groups can be selected: (2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III)(Ir(tfpd)2pic), tris(2-(4,6-difluorophenyl)pyridine))iridium(III)(Ir(Fppy)3), and bis[2-(4,6-difluorophenyl)pyridinate-C2,N](picolinate)iridium(III)(FIrpic). However, the group is not limited to these.

[0339] For example, the first and second blue light-emitting material layers 550 and 570 may each contain a host which is an anthracene derivative and a dopant which is a boron derivative.

[0340] The first charge generation layer 580 is located between the first light-emitting section 530 and the second light-emitting section 540, and the second charge generation layer 590 is located between the first light-emitting section 530 and the third light-emitting section 560. That is, the first light-emitting section 530 and the second light-emitting section 540 are connected by the first charge generation layer 580, and the first light-emitting section 530 and the third light-emitting section 560 are connected by the second charge generation layer 590. The first charge generation layer 580 may be a PN junction charge generation layer in which an N-type charge generation layer 582 and a P-type charge generation layer 584 are joined, and the second charge generation layer 590 may be a PN junction charge generation layer in which an N-type charge generation layer 592 and a P-type charge generation layer 594 are joined.

[0341] The N-type charge generation layer 582 of the first charge generation layer 580 is located between the first hole transport layer 532 and the second electron transport layer 546, and the P-type charge generation layer 584 of the first charge generation layer 580 is located between the N-type charge generation layer 582 and the first hole transport layer 532.

[0342] The N-type charge generation layer 592 of the second charge generation layer 590 is located between the first electron transport layer 534 and the third hole transport layer 562, and the P-type charge generation layer 594 of the second charge generation layer 590 is located between the N-type charge generation layer 592 and the third hole transport layer 562.

[0343] The first and second N-type charge generation layers 582 and 592 may each be made of the aforementioned N-type charge generation material, and the first and second P-type charge generation layers 584 and 594 may each be made of the aforementioned P-type charge generation material.

[0344] As described above, the organic light-emitting diode D of the present invention includes a first light-emitting section 530 containing a green light-emitting material layer 510a and a red light-emitting material layer 510b, a second light-emitting section 540 containing a first blue light-emitting material layer 550, and a third light-emitting section 560 containing a second blue light-emitting material layer 570. The organic light-emitting diode D emits white light.

[0345] The green light-emitting material layer 510a contains the organic compound of the present invention represented by chemical formula 1. This reduces the driving voltage and improves the luminous efficiency in the organic light-emitting diode D.

[0346] Furthermore, the green light-emitting material layer 510a contains a compound represented by chemical formula 3 as a second host, along with the first host which is the organic compound of the present invention, and has significant advantages in terms of driving voltage and luminous efficiency.

[0347] Furthermore, the green light-emitting material layer 510a further contains a light-emitting element (dopant) selected from the compounds of chemical formula 5, along with a first host which is a compound of chemical formula 1 and a second host which is a compound of chemical formula 3, and has significant advantages in terms of driving voltage and luminous efficiency.

[0348] Furthermore, by including at least one of the first to third electron transport layers 534, 546, and 564 in the first to third electron transport layers 534, 546, and 564, at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9, there are significant advantages in terms of driving voltage and luminous efficiency.

[0349] Figure 7 is a schematic cross-sectional view of an organic light-emitting diode according to a sixth embodiment of the present invention.

[0350] Referring to Figure 7, the organic light-emitting layer 462 includes a first light-emitting section 630 containing a green light-emitting material layer 610a, a red light-emitting material layer 610b, and a yellow-green light-emitting material layer 610c; a second light-emitting section 640 containing a first blue light-emitting material layer 650; and a third light-emitting section 660 containing a second blue light-emitting material layer 670. The organic light-emitting layer 462 may further include a first charge-generating layer 680 located between the first light-emitting section 630 and the second light-emitting section 640, and a second charge-generating layer 690 located between the first light-emitting section 630 and the third light-emitting section 660.

[0351] The second light-emitting section 640 is located between the first electrode 460 and the first light-emitting section 630, and the third light-emitting section 660 is located between the first light-emitting section 630 and the second electrode 464. Furthermore, the second light-emitting section 640 is located between the first electrode 460 and the first charge generation layer 680, and the third light-emitting section 660 is located between the second charge generation layer 690 and the second electrode 464. In other words, the second light-emitting section 640, the first charge generation layer 680, the first light-emitting section 630, the second charge generation layer 690, and the third light-emitting section 660 are sequentially stacked on the first electrode 460.

[0352] In the first light-emitting section 630, the red light-emitting material layer 610b is located below the yellow-green light-emitting material layer 610c, and the green light-emitting material layer 610a is located above the yellow-green light-emitting material layer 610c. That is, in the organic light-emitting diode D of Figure 6, the first light-emitting section 530 includes a double layer of light-emitting material layers 510a and 510b, whereas in the organic light-emitting diode D of Figure 7, the first light-emitting section 630 includes a triple layer of light-emitting material layers 610a, 610b, and 610c.

[0353] The first light-emitting section 630 may further include a first electron transport layer 634 located above the green light-emitting material layer 610a. The first light-emitting section 630 may further include a first hole transport layer 632 located below the red light-emitting material layer 610b.

[0354] For example, in the first light-emitting section 630, the red light-emitting material layer 610b may be located between the first hole transport layer 632 and the yellow-green light-emitting material layer 610c, and the green light-emitting material layer 610a may be located between the yellow-green light-emitting material layer 610c and the first electron transport layer 634.

[0355] The second light-emitting section 640 may further include at least one of a second hole transport layer 644 located below the first blue light-emitting material layer 650 and a second electron transport layer 648 located above the first blue light-emitting material layer 650. The second light-emitting section 640 may further include a hole injection layer 642 located between the first electrode 460 and the second hole transport layer 644.

[0356] Furthermore, the second light-emitting section 640 may further include at least one of a first electron-blocking layer (not shown) located between the second hole transport layer 644 and the first blue light-emitting material layer 650, and a first hole-blocking layer (not shown) located between the second electron transport layer 646 and the first blue light-emitting material layer 650.

[0357] The third light-emitting section 660 may further include at least one of a third hole transport layer 662 located below the second blue light-emitting material layer 670 and a third electron transport layer 666 located above the second blue light-emitting material layer 670. The third light-emitting section 660 may further include an electron injection layer 668 located between the second electrode 460 and the third electron transport layer 666.

[0358] Furthermore, the third light-emitting section 660 may further include at least one of a second electron-blocking layer (not shown) located between the third hole transport layer 662 and the second blue light-emitting material layer 670, and a second hole-blocking layer (not shown) located between the third electron transport layer 664 and the second blue light-emitting material layer 670.

[0359] The green light-emitting material layer 610a contains a first compound 612, which is an organic compound of the present invention represented by chemical formula 1. The green light-emitting material layer 610a may further contain a second compound 614, which is represented by chemical formula 3. The green light-emitting material layer 610a may further contain a third compound 616, which is one of the compounds of chemical formula 5.

[0360] In the green light-emitting material layer 610a, the first compound 612 may be an n-type host (first host), the second compound 614 may be a p-type host (second host), and the third compound 616 may be a light-emitting material (dopant). The green light-emitting material layer 610a may have a thickness of 50 to 600 Å.

[0361] In the green light-emitting material layer 610a, the weight ratios of the first and second compounds 612 and 614, respectively, may be greater than the weight ratio of the third compound 616, and the first compound 612 and the second compound 614 may have the same or different weight ratios. In the green light-emitting material layer 610a, the weight ratio of the first compound 612 and the second compound 614 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 612 and the second compound 614 may be the same. For example, the first compound 612 and the second compound 614 may have the same weight ratio, and the third compound 616 may be present in 5 to 25 wt% of the green light-emitting material layer 610a.

[0362] The yellow-green light-emitting material layer 610c contains a first compound 622, which is an organic compound of the present invention represented by chemical formula 1. The yellow-green light-emitting material layer 610c may further contain a second compound 624, which is represented by chemical formula 3. The yellow-green light-emitting material layer 610c may further contain a third compound 626, which is one of the compounds of chemical formula 6.

[0363] In the yellow-green light-emitting material layer 610c, the first compound 622 may be an n-type host (first host), the second compound 624 may be a p-type host (second host), and the third compound 626 may be a light-emitting material (dopant). The yellow-green light-emitting material layer 610c may have a thickness of 50 to 600 Å.

[0364] In the yellow-green light-emitting material layer 610c, the weight ratios of the first and second compounds 622 and 624, respectively, may be greater than the weight ratio of the third compound 626, and the first compound 622 and the second compound 624 may have the same or different weight ratios. In the yellow-green light-emitting material layer 610c, the weight ratio of the first compound 622 and the second compound 624 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 622 and the second compound 624 may be the same. For example, the first compound 622 and the second compound 624 may have the same weight ratio, and the third compound 626 may be present in 5 to 25 wt% of the yellow-green light-emitting material layer 610c.

[0365] Each of the first to third electron transport layers 634, 646, and 664 may contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9.

[0366] The red light-emitting material layer 610b may contain a red host and a red dopant. The red dopant may contain at least one of a red phosphorescent compound, a red fluorescent compound, or a red delayed fluorescent compound. The red host may be the red host material described above, and the red dopant may be the red dopant material described above.

[0367] In the red light-emitting material layer 610b, the red host may have a larger weight ratio than the red dopant. In the red light-emitting material layer 610b, the red dopant may be doped in an amount of 1 to 10 wt%, for example, 1 to 5 wt%.

[0368] The first blue light-emitting material layer 650 of the second light-emitting section 640 includes a first blue host and a first blue dopant, and the second blue light-emitting material layer 670 of the third light-emitting section 660 includes a second blue host and a second blue dopant.

[0369] The first and second blue dopants may each contain at least one of the following: a blue phosphorescent compound, a blue fluorescent compound, or a blue delayed fluorescent compound. The first and second blue hosts may each be the blue host substances described above, and the first and second blue dopants may each be the blue dopant substances described above.

[0370] In the first blue light-emitting material layer 650, the first blue host may have a larger weight ratio than the first blue dopant. In the second blue light-emitting material layer 670, the second blue host may have a larger weight ratio than the second blue dopant. In the first and second blue light-emitting material layers 650 and 670, respectively, the first and second blue dopants may be doped in a content of 1 to 10 wt%, for example, 1 to 5 wt%.

[0371] The first charge generation layer 680 is located between the first light-emitting section 630 and the second light-emitting section 640, and the second charge generation layer 690 is located between the first light-emitting section 630 and the third light-emitting section 660. That is, the first light-emitting section 630 and the second light-emitting section 640 are connected by the first charge generation layer 680, and the first light-emitting section 630 and the third light-emitting section 660 are connected by the second charge generation layer 690. The first charge generation layer 680 may be a PN junction charge generation layer formed by joining an N-type charge generation layer 682 and a P-type charge generation layer 684, and the second charge generation layer 690 may be a PN junction charge generation layer formed by joining an N-type charge generation layer 692 and a P-type charge generation layer 694.

[0372] The N-type charge generation layer 682 of the first charge generation layer 680 is located between the first hole transport layer 632 and the second electron transport layer 646, and the P-type charge generation layer 684 of the first charge generation layer 680 is located between the N-type charge generation layer 682 and the first hole transport layer 632.

[0373] The N-type charge generation layer 692 of the second charge generation layer 690 is located between the first electron transport layer 634 and the third hole transport layer 662, and the P-type charge generation layer 694 of the second charge generation layer 690 is located between the N-type charge generation layer 692 and the third hole transport layer 662.

[0374] As described above, the organic light-emitting diode D of the present invention includes a first light-emitting section 630 containing a green light-emitting material layer 610a, a red light-emitting material layer 610b, and a yellow-green light-emitting material layer 610c, a second light-emitting section 640 containing a first blue light-emitting material layer 650, and a third light-emitting section 660 containing a second blue light-emitting material layer 670, and the organic light-emitting diode D emits white light.

[0375] At least one of the color-emitting material layer 610a and the yellow-green-emitting material layer 610c contains the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage decreases and the luminous efficiency increases in the organic light-emitting diode D.

[0376] Furthermore, at least one of the green light-emitting material layer 610a and the yellow-green light-emitting material layer 610c further contains a compound represented by chemical formula 3 as a second host, along with the first host which is the organic compound of the present invention, and has significant advantages in terms of driving voltage and luminous efficiency.

[0377] Furthermore, the green light-emitting material layer 610a contains a first host, which is a compound of chemical formula 1, a second host, which is a compound of chemical formula 3, and a light-emitting element (dopant), which is one of the compounds of chemical formula 5, and has significant advantages in terms of driving voltage and luminous efficiency.

[0378] Furthermore, the yellow-green light-emitting material layer 610c contains a first host, which is a compound of chemical formula 1, a second host, which is a compound of chemical formula 3, and a light-emitting element (dopant), which is one of the compounds of chemical formula 6, and has significant advantages in terms of driving voltage and luminous efficiency.

[0379] Furthermore, by including at least one of the first to third electron transport layers 634, 646, and 664 in the first to third electron transport layers, and at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9, the device offers significant advantages in terms of driving voltage and luminous efficiency.

[0380] Figure 8 is a schematic cross-sectional view of an organic light-emitting diode according to the seventh embodiment of the present invention.

[0381] Referring to Figure 8, the organic light-emitting layer 462 includes a first light-emitting section 730 containing a yellow-green light-emitting material layer 710, a second light-emitting section 740 containing a first blue light-emitting material layer 750, and a third light-emitting section 760 containing a second blue light-emitting material layer 770. The organic light-emitting layer 462 may further include a first charge generation layer 780 located between the first light-emitting section 730 and the second light-emitting section 740, and a second charge generation layer 790 located between the first light-emitting section 730 and the third light-emitting section 760.

[0382] The second light-emitting section 740 is located between the first electrode 460 and the first light-emitting section 730, and the third light-emitting section 760 is located between the first light-emitting section 730 and the second electrode 464. Furthermore, the second light-emitting section 740 is located between the first electrode 460 and the first charge generation layer 780, and the third light-emitting section 760 is located between the second charge generation layer 790 and the second electrode 464. In other words, the second light-emitting section 740, the first charge generation layer 780, the first light-emitting section 730, the second charge generation layer 790, and the third light-emitting section 760 are sequentially stacked on the first electrode 460.

[0383] In the organic light-emitting diode D shown in Figure 6, the first light-emitting section 530 includes a double layer of light-emitting material 510a and 510b, and in the organic light-emitting diode D shown in Figure 7, the first light-emitting section 630 includes a triple layer of light-emitting material 610a, 610b, and 610c. Alternatively, in the organic light-emitting diode D shown in Figure 8, the first light-emitting section 730 includes a single layer of light-emitting material 710.

[0384] The first light-emitting section 730 may further include a first electron transport layer 734 located above the yellow-green light-emitting material layer 710 and a first hole transport layer 732 located below the yellow-green light-emitting material layer 710.

[0385] For example, in the first light-emitting section 730, the lower surface of the yellow-green light-emitting material layer 710 may be in contact with the first hole transport layer 732, and the upper surface of the yellow-green light-emitting material layer 710 may be in contact with the first electron transport layer 734.

[0386] The second light-emitting section 740 may further include at least one of a second hole transport layer 744 located below the first blue light-emitting material layer 750 and a second electron transport layer 748 located above the first blue light-emitting material layer 750. The second light-emitting section 740 may further include a hole injection layer (742) located between the first electrode 460 and the second hole transport layer 744.

[0387] Furthermore, the second light-emitting section 740 may further include at least one of a first electron-blocking layer (not shown) located between the second hole transport layer 744 and the first blue light-emitting material layer 750, and a first hole-blocking layer (not shown) located between the second electron transport layer 746 and the first blue light-emitting material layer 750.

[0388] The third light-emitting section 760 may further include at least one of a third hole transport layer 762 located below the second blue light-emitting material layer 770 and a third electron transport layer 766 located above the second blue light-emitting material layer 770. The third light-emitting section 760 may further include an electron injection layer (768) located between the second electrode 460 and the third electron transport layer 766.

[0389] Furthermore, the third light-emitting section 760 may further include at least one of a second electron-blocking layer (not shown) located between the third hole transport layer 762 and the second blue light-emitting material layer 770, and a second hole-blocking layer (not shown) located between the third electron transport layer 764 and the second blue light-emitting material layer 770.

[0390] The yellow-green light-emitting material layer 710 contains a first compound 712, which is an organic compound of the present invention represented by chemical formula 1. The yellow-green light-emitting material layer 710 may further contain a second compound 714, which is represented by chemical formula 3. The yellow-green light-emitting material layer 710 may further contain a third compound 716, which is one of the compounds of chemical formula 6.

[0391] In the yellow-green light-emitting material layer 710, the first compound 712 may be an n-type host (first host), the second compound 714 may be a p-type host (second host), and the third compound 716 may be a light-emitting material (dopant). The yellow-green light-emitting material layer 710 may have a thickness of 50 to 600 Å.

[0392] In the yellow-green light-emitting material layer 710, the weight ratios of the first and second compounds 712 and 714, respectively, may be greater than the weight ratio of the third compound 716, and the first compound 712 and the second compound 714 may have the same or different weight ratios. In the yellow-green light-emitting material layer 710, the weight ratio of the first compound 712 and the second compound 714 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 712 and the second compound 714 may be the same. For example, the first compound 712 and the second compound 714 may have the same weight ratio, and the third compound 716 may be present in the yellow-green light-emitting material layer 710 at a concentration of 5 to 25 wt%.

[0393] Each of the first to third electron transport layers 734, 746, and 764 may contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9.

[0394] The first blue light-emitting material layer 750 of the second light-emitting section 740 includes a first blue host and a first blue dopant, and the second blue light-emitting material layer 770 of the third light-emitting section 760 includes a second blue host and a second blue dopant.

[0395] The first and second blue dopants may each contain at least one of the following: a blue phosphorescent compound, a blue fluorescent compound, or a blue delayed fluorescent compound. The first and second blue hosts may each be the blue host substances described above, and the first and second blue dopants may each be the blue dopant substances described above.

[0396] In the first blue light-emitting material layer 750, the first blue host may have a larger weight ratio than the first blue dopant. In the second blue light-emitting material layer 770, the second blue host may have a larger weight ratio than the second blue dopant. In the first and second blue light-emitting material layers 750 and 770, respectively, the first and second blue dopants may be doped in a content of 1 to 10 wt%, for example, 1 to 5 wt%.

[0397] The first charge generation layer 780 is located between the first light-emitting section 730 and the second light-emitting section 740, and the second charge generation layer 790 is located between the first light-emitting section 730 and the third light-emitting section 760. That is, the first light-emitting section 730 and the second light-emitting section 740 are connected by the first charge generation layer 780, and the first light-emitting section 730 and the third light-emitting section 760 are connected by the second charge generation layer 790. The first charge generation layer 780 may be a PN junction charge generation layer formed by joining an N-type charge generation layer 782 and a P-type charge generation layer 784, and the second charge generation layer 790 may be a PN junction charge generation layer formed by joining an N-type charge generation layer 792 and a P-type charge generation layer 794.

[0398] The N-type charge generation layer 782 of the first charge generation layer 780 is located between the first hole transport layer 732 and the second electron transport layer 746, and the P-type charge generation layer 784 of the first charge generation layer 780 is located between the N-type charge generation layer 782 and the first hole transport layer 732.

[0399] The N-type charge generation layer 792 of the second charge generation layer 790 is located between the first electron transport layer 734 and the third hole transport layer 762, and the P-type charge generation layer 794 of the second charge generation layer 790 is located between the N-type charge generation layer 792 and the third hole transport layer 762.

[0400] As described above, the organic light-emitting diode D of the present invention includes a first light-emitting section 730 containing a yellow-green light-emitting material layer 710, a second light-emitting section 740 containing a first blue light-emitting material layer 750, and a third light-emitting section 760 containing a second blue light-emitting material layer 770, and the organic light-emitting diode D emits white light.

[0401] The yellow-green light-emitting material layer 710 contains the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage decreases and the luminous efficiency increases in the organic light-emitting diode D.

[0402] Furthermore, the yellow-green light-emitting material layer 710 contains, together with the first host which is the organic compound of the present invention, a compound represented by chemical formula 3 as a second host, and has significant advantages in terms of driving voltage and luminous efficiency.

[0403] Furthermore, the yellow-green light-emitting material layer 710 contains a first host, which is a compound of chemical formula 1, a second host, which is a compound of chemical formula 3, and a light-emitting element (dopant), which is one of the compounds of chemical formula 6, and has significant advantages in terms of driving voltage and luminous efficiency.

[0404] Furthermore, by including at least one of the first to third electron transport layers (734, 746, 76) in the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9, there are significant advantages in terms of driving voltage and luminous efficiency.

[0405] Figure 9 is a schematic cross-sectional view of an organic light-emitting diode according to the eighth embodiment of the present invention.

[0406] Referring to Figure 9, the organic light-emitting layer 462 includes a first light-emitting section 830 containing a green light-emitting material layer 810a, and a second light-emitting section 840 containing a blue light-emitting material layer 850. The organic light-emitting layer 462 may further include a charge-generating layer 860 located between the first light-emitting section 830 and the second light-emitting section 840. The first light-emitting section 830 may further include a red light-emitting material layer 810b.

[0407] The second light-emitting section 840 is located between the first electrode 460 and the first light-emitting section 830. The first light-emitting section 830 is located between the second electrode 464 and the charge generation layer 860, and the second light-emitting section 840 is located between the first electrode 460 and the charge generation layer 860. In other words, the second light-emitting section 840, the charge generation layer 860, and the first light-emitting section 830 are sequentially stacked on the first electrode 460.

[0408] The organic light-emitting diode D in Figure 6 includes first to third light-emitting sections 530, 540, and 560; the organic light-emitting diode D in Figure 7 includes first to third light-emitting sections 630, 640, and 660; and the organic light-emitting diode D in Figure 8 includes first to third light-emitting sections 730, 740, and 760. Alternatively, the organic light-emitting diode D in Figure 9 has a two-stack structure including first and second light-emitting sections 830 and 840.

[0409] In the first light-emitting section 830, the red light-emitting material layer 810b may be located below the green light-emitting material layer 810a.

[0410] The first light-emitting section 830 may further include a first electron transport layer 834 located above the green light-emitting material layer 810a. The first light-emitting section 830 may further include a first hole transport layer 832 located below the red light-emitting material layer 810b.

[0411] Furthermore, the first light-emitting section 830 may further include an electron injection layer 836 located on the first electron transport layer 834.

[0412] Furthermore, the first light-emitting section 830 may further include at least one of the following: a first electron-blocking layer (not shown) located between the first hole transport layer 832 and the red light-emitting material layer 810b, and a first hole-blocking layer (not shown) located between the first electron transport layer 834 and the green light-emitting material layer 810a.

[0413] The second light-emitting section 840 may further include at least one of a second hole transport layer 844 located below the blue light-emitting material layer 850 and a second electron transport layer 848 located above the blue light-emitting material layer 850. The second light-emitting section 840 may further include a hole injection layer 842 located between the first electrode 460 and the second hole transport layer 844.

[0414] Furthermore, the second light-emitting section 840 may further include at least one of the following: a second electron-blocking layer (not shown) located between the second hole transport layer 844 and the blue light-emitting material layer 850, and a second hole-blocking layer (not shown) located between the second electron transport layer 846 and the blue light-emitting material layer 850.

[0415] The green light-emitting material layer 810a contains a first compound 812, which is an organic compound of the present invention represented by chemical formula 1. The green light-emitting material layer 810a may further contain a second compound 814, which is represented by chemical formula 3. The green light-emitting material layer 810a may further contain a third compound 816, which is one of the compounds of chemical formula 5.

[0416] In the green light-emitting material layer 810a, the first compound 812 may be an n-type host (first host), the second compound 814 may be a p-type host (second host), and the third compound 816 may be a light-emitting material (dopant). The green light-emitting material layer 810a may have a thickness of 50 to 600 Å.

[0417] In the green light-emitting material layer 810a, the weight ratios of the first and second compounds 812 and 814, respectively, may be greater than the weight ratio of the third compound 816, and the first compound 812 and the second compound 814 may have the same or different weight ratios. In the green light-emitting material layer 810a, the weight ratio of the first compound 812 and the second compound 814 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 812 and the second compound 814 may be the same. For example, the first compound 812 and the second compound 814 may have the same weight ratio, and the third compound 816 may be present in 5 to 25 wt% of the green light-emitting material layer 810a.

[0418] The first and second electron transport layers 834 and 846, respectively, may each contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9.

[0419] The blue light-emitting material layer 850 of the second light-emitting section 840 contains a blue host and a blue dopant. Each blue dopant may contain at least one of a blue phosphorescent compound, a blue fluorescent compound, or a blue delayed fluorescent compound. The blue host may be the blue host material described above, and the blue dopant may be the blue dopant material described above.

[0420] In the blue light-emitting material layer 850, the blue host may have a larger weight ratio than the blue dopant. In the blue light-emitting material layer 850, the blue dopant may be doped in an amount of 1 to 10 wt%, for example, 1 to 5 wt%.

[0421] The charge generation layer 860 is located between the first light-emitting section 830 and the second light-emitting section 840. That is, the first light-emitting section 830 and the second light-emitting section 840 are connected by the charge generation layer 860. The charge generation layer 860 may be a PN junction charge generation layer in which an N-type charge generation layer 882 and a P-type charge generation layer 884 are joined together.

[0422] The N-type charge generation layer 862 of the charge generation layer 860 is located between the first hole transport layer 832 and the second electron transport layer 846, and the P-type charge generation layer 864 of the charge generation layer 860 is located between the N-type charge generation layer 862 and the first hole transport layer 832.

[0423] As described above, the organic light-emitting diode D of the present invention includes a first light-emitting section 830 containing a green light-emitting material layer 810a and a red light-emitting material layer 810b, and a second light-emitting section 840 containing a blue light-emitting material layer 850, and the organic light-emitting diode D emits white light.

[0424] The green light-emitting material layer 810a contains the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage is reduced and the luminous efficiency is increased in the organic light-emitting diode D.

[0425] Furthermore, the green light-emitting material layer 810a further contains a compound represented by chemical formula 3 as a second host, along with the first host which is the organic compound of the present invention, and has significant advantages in terms of driving voltage and luminous efficiency.

[0426] Furthermore, the green light-emitting material layer 810a contains a first host, which is a compound of chemical formula 1, a second host, which is a compound of chemical formula 3, and a light-emitting dopant, which is one of the compounds of chemical formula 5, and has significant advantages in terms of driving voltage and luminous efficiency.

[0427] Furthermore, by including at least one of the first and second electron transport layers 834 and 846 in the first electron transport layer, at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9, the device offers significant advantages in terms of driving voltage and luminous efficiency.

[0428] Figure 10 is a schematic cross-sectional view of an organic light-emitting diode according to the ninth embodiment of the present invention.

[0429] Referring to Figure 10, the organic light-emitting layer 462 includes a first light-emitting section 930 containing a yellow-green light-emitting material layer 910, and a second light-emitting section 940 containing a blue light-emitting material layer 950. The organic light-emitting layer 462 may further include a charge-generating layer 960 located between the first light-emitting section 930 and the second light-emitting section 940.

[0430] The second light-emitting section 940 is located between the first electrode 460 and the first light-emitting section 930. The first light-emitting section 930 is located between the second electrode 464 and the charge generation layer 960, and the second light-emitting section 940 is located between the first electrode 460 and the charge generation layer 960. In other words, the second light-emitting section 940, the charge generation layer 960, and the first light-emitting section 930 are sequentially stacked on the first electrode 460.

[0431] In the organic light-emitting diode D shown in Figure 9, the first light-emitting section 830 includes a double layer of light-emitting material 810a and 810b, whereas in the organic light-emitting diode D shown in Figure 10, the first light-emitting section 930 includes a single layer of light-emitting material 910.

[0432] The first light-emitting section 930 may further include a first electron transport layer 934 located above the yellow-green light-emitting material layer 910 and a first hole transport layer 932 located below the yellow-green light-emitting material layer 910.

[0433] Furthermore, the first light-emitting section 930 may further include an electron injection layer 936 located on the first electron transport layer 934.

[0434] Furthermore, the first light-emitting section 930 may further include at least one of the following: a first electron-blocking layer (not shown) located between the first hole transport layer 932 and the yellow-green light-emitting material layer 910, and a first hole-blocking layer (not shown) located between the first electron transport layer 934 and the yellow-green light-emitting material layer 910.

[0435] The second light-emitting section 940 may further include at least one of a second hole transport layer 944 located below the blue light-emitting material layer 950 and a second electron transport layer 948 located above the blue light-emitting material layer 950. The second light-emitting section 940 may further include a hole injection layer 942 located between the first electrode 460 and the second hole transport layer 944.

[0436] Furthermore, the second light-emitting section 940 may further include at least one of a second electron-blocking layer (not shown) located between the second hole transport layer 944 and the blue light-emitting material layer 950, and a second hole-blocking layer (not shown) located between the second electron transport layer 946 and the blue light-emitting material layer 950.

[0437] The yellow-green light-emitting material layer 910 contains a first compound 912, which is an organic compound of the present invention represented by chemical formula 1. The yellow-green light-emitting material layer 910 may further contain a second compound 914, which is represented by chemical formula 3. The yellow-green light-emitting material layer 910 may further contain a third compound 916, which is one of the compounds of chemical formula 6.

[0438] In the yellow-green light-emitting material layer 910, the first compound 912 may be an n-type host (first host), the second compound 914 may be a p-type host (second host), and the third compound 916 may be a light-emitting material (dopant). The yellow-green light-emitting material layer 910 may have a thickness of 50 to 600 Å.

[0439] In the yellow-green light-emitting material layer 910, the weight ratios of the first and second compounds 912 and 914, respectively, may be greater than the weight ratio of the third compound 916, and the first compound 912 and the second compound 914 may have the same or different weight ratios. In the yellow-green light-emitting material layer 910, the weight ratio of the first compound 912 and the second compound 914 may be 1:9 to 9:1, for example, 2:8 to 8:2 or 3:7 to 7:3. Preferably, the weight ratios of the first compound 912 and the second compound 914 may be the same. For example, the first compound 912 and the second compound 914 may have the same weight ratio, and the third compound 916 may be present in the yellow-green light-emitting material layer 910 at a concentration of 5 to 25 wt%.

[0440] The first and second electron transport layers 934 and 946, respectively, may each contain at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the fourth electron transport material represented by chemical formula 9.

[0441] The blue light-emitting material layer 950 of the second light-emitting section 940 contains a blue host and a blue dopant. Each blue dopant may contain at least one of a blue phosphorescent compound, a blue fluorescent compound, or a blue delayed fluorescent compound. The blue host may be the blue host material described above, and the blue dopant may be the blue dopant material described above.

[0442] In the blue light-emitting material layer 950, the blue host may have a larger weight ratio than the blue dopant. In the blue light-emitting material layer 950, the blue dopant may be doped in an amount of 1 to 10 wt%, for example, 1 to 5 wt%.

[0443] The charge generation layer 960 is located between the first light-emitting section 930 and the second light-emitting section 940. That is, the first light-emitting section 930 and the second light-emitting section 940 are connected by the charge generation layer 960. The charge generation layer 960 may be a PN junction charge generation layer in which an N-type charge generation layer 982 and a P-type charge generation layer 984 are joined together.

[0444] The N-type charge generation layer 962 of the charge generation layer 960 is located between the first hole transport layer 932 and the second electron transport layer 946, and the P-type charge generation layer 964 of the charge generation layer 960 is located between the N-type charge generation layer 962 and the first hole transport layer 932.

[0445] As described above, the organic light-emitting diode D of the present invention includes a first light-emitting section 930 containing a yellow-green light-emitting material layer 910 and a second light-emitting section 940 containing a blue light-emitting material layer 950, and the organic light-emitting diode D emits white light.

[0446] The yellow-green light-emitting material layer 910 contains the organic compound of the present invention represented by chemical formula 1. As a result, the driving voltage of the organic light-emitting diode D decreases and the luminous efficiency increases.

[0447] Furthermore, the yellow-green light-emitting material layer 910 contains, together with the first host which is the organic compound of the present invention, a compound represented by chemical formula 3 as a second host, and has significant advantages in terms of driving voltage and luminous efficiency.

[0448] Furthermore, the yellow-green light-emitting material layer 910 contains a first host, which is a compound of chemical formula 1, a second host, which is a compound of chemical formula 3, and a light-emitting element (dopant), which is one of the compounds of chemical formula 6, and has significant advantages in terms of driving voltage and luminous efficiency.

[0449] Furthermore, by including at least one of the first and second electron transport layers 934 and 946 in the first electron transport layer, the second electron transport layer represented by chemical formula 7, the second electron transport layer represented by chemical formula 8, and the fourth electron transport layer represented by chemical formula 9, the device offers significant advantages in terms of driving voltage and luminous efficiency.

[0450] Although preferred embodiments of the present invention have been described above with reference to the present invention, a person ordinary in the art will understand that the present invention can be modified and altered in various ways without departing from the technical idea and scope of the present invention as described in the following claims. [Explanation of Symbols]

[0451] 100, 400 Organic Light-Emitting Display Devices 160, 460 1st electrode 162, 462 Organic light-emitting layer 164,464 2nd electrode 230, 320, 340 (green or yellow-green) luminescent material layer 510a, 610a, 810a Green light-emitting material layer 610c, 710, 910 Yellow-green luminescent material layer D Organic Light-Emitting Diode

Claims

1. Chemical formula 2: [Chemical formula 2] An organic compound characterized by being one of the following compounds.

2. circuit board and; An organic light-emitting diode located on the substrate, comprising: a first electrode; a second electrode facing the first electrode; and a first light-emitting portion located between the first electrode and the second electrode, comprising a first light-emitting material layer; The first light-emitting material layer comprises a first compound which is the organic compound described in claim 1, in an organic light-emitting device.

3. The first light-emitting material layer further comprises a second compound represented by chemical formula 3, [Chemical formula 3] In chemical formula 3, c1 and c4 are independent integers between 0 and 4, and c2 and c3 are independent integers between 0 and 3. R １１ , R １２ , R １３ , R １４ Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. L １１ , L １２ Each is independently selected from the group consisting of single-bonded, substituted or unsubstituted C6-C60 arylene groups and substituted or unsubstituted C3-C60 heteroarylene groups. Ar １１ Ar １２ The organic light-emitting apparatus according to claim 2, characterized in that each is independently selected from the group consisting of substituted or unsubstituted C6-C30 aryl groups and substituted or unsubstituted C3-C30 heteroaryl groups.

4. The organic light-emitting apparatus according to claim 3, characterized in that the second compound is one of the compounds of chemical formula 4. [Chemical formula 4]

5. The organic light-emitting apparatus according to claim 4, characterized in that the first light-emitting material layer further comprises a third compound which is one of the compounds of chemical formula 5. [Chemical formula 5]

6. The organic light-emitting apparatus according to claim 3, characterized in that the first light-emitting material layer further comprises a third compound which is one of the compounds of chemical formula 6. [Chemical formula 6]

7. The organic light-emitting apparatus according to claim 5, characterized in that the weight percentage of the first compound and the second compound, respectively, is greater than the weight percentage of the third compound.

8. The organic light-emitting apparatus according to claim 7, characterized in that the weight percentage ratio of the first compound to the second compound is 1:9 to 9:1, 2:8 to 8:2, or 3:7 to 7:

3.

9. The organic light-emitting apparatus according to claim 5, characterized in that the weight percentage of the first compound and the weight percentage of the second compound are the same.

10. The organic light-emitting apparatus according to claim 9, characterized in that the third compound is present in the first light-emitting material layer in an amount of 5 to 25% by weight relative to the total weight of the components of the first light-emitting material layer.

11. The first light-emitting portion further includes a first electron transport layer located between the first light-emitting material layer and the second electrode, The first electron transport layer includes at least one of the first electron transport material represented by chemical formula 7, the second electron transport material represented by chemical formula 8, and the third electron transport material represented by chemical formula 9. [Chemical formula 7] In Chemical Formula 7, L ２１ is selected from the group consisting of a single bond, a substituted or unsubstituted C6-C60 arylene group, and a substituted or unsubstituted C3-C60 heteroarylene group, Ar ２１ It is represented by chemical formula 7a or chemical formula 7b, Ar ２２ Ar ２３ Each is independently selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. [Chemical formula 7a] [Chemical formula 7b] In chemical formula 7a, d1 is an integer between 0 and 4. R ２１ This is selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. R ２２ Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. In chemical formula 7b, d2 is an integer between 0 and 4. R ２３ This is selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. R ２４ Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, substituted or unsubstituted C1-C10 alkoxy groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. [Chemical formula 8] In chemical formula 8, e1, e2, e3, and e4 are each independent integers between 0 and 4, and e5 is either 0 or 1. R ３１ , R ３２ , R ３３ , R ３４ Each is independently selected from the group consisting of deuterium, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. X １ , X ２ , X ３ Each is independent of N or CR ３５ X １ , X ２ , X ３ At least two of them are N, R ３５ Each is independently selected from the group consisting of hydrogen, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C6-C30 aryl groups, and substituted or unsubstituted C3-C30 heteroaryl groups. Ar ３１ Ar ３２ Each is independently selected from the group consisting of substituted or unsubstituted C6-C30 aryl groups and substituted or unsubstituted C3-C30 heteroaryl groups. L ３１ This is selected from the group consisting of substituted or unsubstituted C6-C30 arylene groups and substituted or unsubstituted C3-C30 heteroarylene groups. [Chemical formula 9] In chemical formula 9, f1, f2, and f3 are each independent integers between 0 and 4, and f4 is an integer between 0 and 3. R ４１ , R ４２ , R ４３ , R ４４ Each is independently selected from the group consisting of substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. X １１ is O, S or NR ４５ And, R ４５ These are substituted or unsubstituted C6-C30 aryl groups, which are linked to adjacent benzene rings to form a ring. X １２ , X １３ , X １４ Each is independent of N or CR ４６ X １２ , X １３ , X １４ At least two of them are N, Ar ４１ Ar ４２ , R ４６ Each is independently selected from the group consisting of hydrogen, substituted or unsubstituted C6-C60 aryl groups, and substituted or unsubstituted C3-C60 heteroaryl groups. L ４１ The organic light-emitting apparatus according to claim 2, characterized in that is selected from the group consisting of single-bonded, substituted or unsubstituted C6-C60 arylene groups and substituted or unsubstituted C3-C60 heteroarylene groups.

12. The organic light-emitting apparatus according to claim 11, characterized in that the first electron transport material is one of the compounds of chemical formula 10, the second electron transport material is one of the compounds of chemical formula 11, and the third electron transport material is one of the compounds of chemical formula 12. [Chemical formula 10] [Chemical formula 11] [Chemical formula 12]

13. The organic light-emitting diode further includes a second light-emitting portion, the second light-emitting portion includes a second light-emitting material layer and is located between the first light-emitting portion and the second electrode. The organic light-emitting apparatus according to claim 2, characterized in that the second light-emitting material layer contains the first compound.

14. The organic light-emitting device according to claim 2, wherein the organic light-emitting diode further includes a second light-emitting portion, the second light-emitting portion includes a first blue light-emitting material layer and is located between the first electrode and the first light-emitting portion.

15. The organic light-emitting apparatus according to claim 14, characterized in that the first light-emitting portion further includes a red light-emitting material layer located between the second light-emitting portion and the first light-emitting material layer.

16. The organic light-emitting apparatus according to claim 15, characterized in that the first light-emitting section further includes a yellow-green light-emitting material layer located between the first light-emitting material layer and the red light-emitting material layer.

17. The organic light-emitting device according to claim 14, wherein the organic light-emitting diode further includes a third light-emitting portion, the third light-emitting portion includes a second blue light-emitting material layer and is located between the first light-emitting portion and the second electrode.

18. The organic light-emitting apparatus according to claim 17, characterized in that the first light-emitting portion further includes a red light-emitting material layer located between the second light-emitting portion and the first light-emitting material layer.

19. The organic light-emitting apparatus according to claim 18, characterized in that the first light-emitting section further includes a yellow-green light-emitting material layer located between the first light-emitting material layer and the red light-emitting material layer.

20. The organic light-emitting apparatus according to claim 2, further comprising a color filter layer corresponding to a red pixel region, a green pixel region, and a blue pixel region.

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