Organic light emitting diode and organic light emitting device including the same

Abstract

The present disclosure relates to an OLED, which includes: a first electrode; a second electrode facing the first electrode; a first light-emitting material layer located between the first electrode and the second electrode, the first light-emitting material layer including a first matrix, a second matrix, and a blue dopant; a first electron blocking layer located between the first electrode and the first light-emitting material layer, the first electron blocking layer including an electron blocking material of an amine derivative; and a first hole blocking layer located between the second electrode and the first light-emitting material layer, the first hole blocking layer including at least one of a first hole blocking material and a second hole blocking material, wherein the first matrix is an anthracene derivative, the second matrix is a deuterated anthracene derivative, and wherein the first hole blocking material is an azine derivative and the second hole blocking material is a benzimidazole derivative.

Description

Technical Field

[0001] The present disclosure relates to an organic light emitting diode (OLED), and more particularly, to an OLED having enhanced luminous efficiency and lifespan and an organic light emitting device including the OLED. Background Art

[0002] As the demand for flat panel display devices with a smaller footprint increases, organic light emitting display devices including OLEDs have become the subject of recent research and development.

[0003] An OLED emits light by injecting electrons from a cathode, which is an electron injection electrode, and holes from an anode, which is a hole injection electrode, into a light emitting material layer (EML), combining the electrons and holes to generate excitons, and causing the excitons to transition from an excited state to a ground state. A flexible transparent substrate, such as a plastic substrate, can be used as a base substrate for forming each element. In addition, an organic light emitting display device can be operated at a voltage lower than the voltage required to operate other display devices (e.g., 10V or lower). In addition, organic light emitting display devices have advantages in power consumption and color perception.

[0004] An OLED includes: a first electrode as an anode above a substrate, a second electrode spaced apart from and facing the first electrode, and an organic light emitting layer therebetween.

[0005] For example, an organic light emitting display device may include a red pixel region, a green pixel region, and a blue pixel region, and an OLED may be formed in each of the red pixel region, the green pixel region, and the blue pixel region.

[0006] However, the OLEDs in blue pixels cannot provide sufficient luminous efficiency and lifespan, such that the organic light emitting display device is limited in terms of luminous efficiency and lifespan. Summary of the Invention

[0007] [Technical Problem]

[0008] Accordingly, the present disclosure is directed to an OLED and an organic light emitting device including the OLED that substantially eliminates one or more problems due to the limitations and disadvantages of the prior art.

[0009] An object of the present disclosure is to provide an OLED having enhanced luminous efficiency and lifespan and an organic light emitting device including the OLED.

[0010] Additional features and advantages of the present disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present disclosure. The objectives and other advantages of the present disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0011] [Technical Solution]

[0012] According to one aspect, the present disclosure provides an OLED, which includes a first electrode; a second electrode facing the first electrode; a first light-emitting material layer located between the first electrode and the second electrode, the first light-emitting material layer including a first matrix, a second matrix, and a blue dopant; a first electron blocking layer located between the first electrode and the first light-emitting material layer, the first electron blocking layer including an electron blocking material of an amine derivative; and a first hole blocking layer located between the second electrode and the first light-emitting material layer, the first hole blocking layer including at least one of a first hole blocking material and a second hole blocking material, wherein the first matrix is an anthracene derivative, the second matrix is a deuterated anthracene derivative, and wherein the first hole blocking material is an azine derivative and the second hole blocking material is a benzimidazole derivative.

[0013] As an example, in the first light-emitting material layer, the weight percentage of the first matrix to the second matrix is from 1:9 to 9:1.

[0014] As an example, in the first light-emitting material layer, the weight percentage of the first matrix to the second matrix is from 1:9 to 7:3.

[0015] As an example, in the first light-emitting material layer, the weight percentage of the first matrix to the second matrix is 3:7.

[0016] As an example, in the first light-emitting material layer, the weight percentage of the first matrix to the second matrix is 7:3.

[0017] The OLED may include a single light-emitting part or a tandem structure of a plurality of light-emitting parts.

[0018] The OLED with a tandem structure may emit blue or white light.

[0019] According to another aspect, the present disclosure provides an organic light-emitting device including the OLED as described above.

[0020] For example, the organic light-emitting device may be an organic light-emitting display device or a lighting device.

[0021] It should be understood that the foregoing general description and the following detailed description are both exemplary and explanatory and are intended to provide further explanation of the claimed present disclosure.

[0022] [Advantageous Effects]

[0023] The light-emitting material layer of the OLED of the present disclosure includes a first matrix of an anthracene derivative and a second matrix of a deuterated anthracene derivative, thereby improving the light-emitting efficiency and lifespan of the OLED and the organic light-emitting device including the OLED.

[0024] In addition, the electron blocking layer of the OLED of the present disclosure includes an amine derivative as an electron blocking material, and the hole blocking layer of the OLED includes at least one of an azine derivative and a benzimidazole derivative as a hole blocking material. Therefore, the lifespan of the OLED and the organic light-emitting device is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The included drawings are used to provide a further understanding of the present disclosure, and the drawings are incorporated into this specification and constitute a part of this specification. The drawings illustrate embodiments of the present disclosure and, together with the specification, are used to explain the principles of the embodiments of the present disclosure.

[0026] Figure 1 is a schematic circuit diagram showing the organic light-emitting display device of the present disclosure.

[0027] Figure 2 is a schematic cross-sectional view showing the organic light-emitting display device according to the first embodiment of the present disclosure.

[0028] Figure 3 is a schematic cross-sectional view showing an OLED having a single light-emitting part for an organic light-emitting display device according to the first embodiment of the present disclosure.

[0029] Figure 4 is a schematic cross-sectional view showing an OLED having a series structure with two light-emitting parts according to the first embodiment of the present disclosure.

[0030] Figure 5 is a schematic cross-sectional view showing the organic light-emitting display device according to the second embodiment of the present disclosure.

[0031] Figure 6 is a schematic cross-sectional view showing an OLED for an organic light-emitting display device according to the second embodiment of the present disclosure.

[0032] Figure 7 is a schematic cross-sectional view showing the organic light-emitting display device according to the third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Now, various aspects of the present disclosure, whose examples are shown in the drawings, will be described in detail.

[0034] Figure 1 is a schematic circuit diagram showing the organic light-emitting display device of the present disclosure

[0035] As Figure 1 shown, in the organic light-emitting display device, gate lines GL, data lines DL, and power supply lines PL are formed to cross each other to define pixels (pixel regions) P. A switching thin-film transistor (TFT) Ts, a driving TFT Td, a storage capacitor Cst, and an OLED D are formed in the pixel region P. The pixel region P may include red pixels, green pixels, and blue pixels.

[0036] The switching thin-film transistor Ts is connected to the gate line GL and the data line DL, and the driving thin-film transistor Td and the storage capacitor Cst are connected between the switching thin-film transistor Ts and the power supply line PL. The OLED D is connected to the driving thin-film transistor Td. When the switching thin-film transistor Ts is turned on by a gate signal applied via the gate line GL, a data signal applied via the data line DL is applied to the gate of the driving thin-film transistor Td and one electrode of the storage capacitor Cst through the switching thin-film transistor Ts.

[0037] The driving thin-film transistor Td is turned on by the data signal applied to the gate electrode, so that a current proportional to the data signal is supplied from the power supply line PL to the OLED D through the driving thin-film transistor Tr. The OLED D emits light having a luminance proportional to the current flowing through the driving thin-film transistor Td. In this case, the storage capacitor Cst is charged with a voltage proportional to the data signal, so that the voltage of the gate electrode in the driving thin-film transistor Td remains constant during one frame. Therefore, the organic light-emitting display device can display a desired image.

[0038] Figure 2 is a schematic cross-sectional view showing the organic light-emitting display device according to the first embodiment of the present disclosure.

[0039] As Figure 2 shown, the organic light-emitting display device 100 includes a substrate 110, a TFT Tr, and an OLED D connected to the TFT Tr. For example, the organic light-emitting display device 100 may include red pixels, green pixels, and blue pixels, and the OLED D may be formed in each of the red pixels, green pixels, and blue pixels. That is, OLED Ds that emit red light, green light, and blue light may be provided in the red pixels, green pixels, and blue pixels, respectively.

[0040] The substrate 110 may be a glass substrate or a plastic substrate. For example, the substrate 110 may be a polyimide substrate.

[0041] The buffer layer 120 is formed on the substrate, and the TFT Tr is formed on the buffer layer 120. The buffer layer 120 may be omitted.

[0042] The semiconductor layer 122 is formed on the buffer layer 120. The semiconductor layer 122 may include an oxide semiconductor material or polysilicon.

[0043] When the semiconductor layer 122 includes an oxide semiconductor material, a light-shielding pattern (not shown) may be formed under the semiconductor layer 122. The light reaching the semiconductor layer 122 is blocked or obstructed by the light-shielding pattern, thereby preventing thermal degradation of the semiconductor layer 122. On the other hand, when the semiconductor layer 122 includes polysilicon, impurities may be doped on both sides of the semiconductor layer 122.

[0044] The gate insulating layer 124 is formed on the semiconductor layer 122. The gate insulating layer 124 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride.

[0045] The gate 130 formed of a conductive material such as metal is formed on the gate insulating layer 124 corresponding to the center of the semiconductor layer 122.

[0046] In Figure 2 the gate insulating layer 124 is formed on the entire surface of the substrate 110. Alternatively, the gate insulating layer 124 may be patterned to have the same shape as the gate 130.

[0047] The interlayer insulating layer 132 formed of an insulating material is formed on the gate 130. The interlayer insulating layer 132 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride or an organic insulating material such as benzocyclobutene or optical acrylic.

[0048] The interlayer insulating layer 132 includes a first contact hole 134 and a second contact hole 136 that expose both sides of the semiconductor layer 122. The first contact hole 134 and the second contact hole 136 are located on both sides of the gate 130 and are spaced apart from the gate 130.

[0049] The first contact hole 134 and the second contact hole 136 are formed to penetrate the gate insulating layer 124. Alternatively, when the gate insulating layer 124 is patterned to have the same shape as the gate 130, the first contact hole 134 and the second contact hole 136 are formed to penetrate only the interlayer insulating layer 132.

[0050] The source electrode 140 and the drain electrode 142 formed of a conductive material such as metal are formed on the interlayer insulating layer 132.

[0051] The source electrode 140 and the drain electrode 142 are spaced apart from each other with respect to the gate 130 and are respectively in contact with both sides of the semiconductor layer 122 via the first contact hole 134 and the second contact hole 136.

[0052] The semiconductor layer 122, the gate 130, the source 140, and the drain 142 constitute the TFT Tr. The TFT Tr serves as a driving element. That is, the TFT Tr can correspond to the driving TFT Td of ( Figure 1 ).

[0053] In the TFT Tr, the gate 130, the source 140, and the drain 142 are located above the semiconductor layer 122. That is, the TFT Tr has a coplanar structure.

[0054] Alternatively, in the TFT Tr, the gate can be located below the semiconductor layer, and the source and the drain can be located above the semiconductor layer, such that the TFT Tr can have an inverted staggered structure. In this case, the semiconductor layer can include amorphous silicon.

[0055] Although not shown, the gate line and the data line cross each other to define a pixel, and the switching TFT is formed to be connected to the gate line and the data line. The switching TFT is connected to the TFT Tr serving as a driving element.

[0056] In addition, a power supply line and a storage capacitor can be further formed. The power supply line can be formed to be parallel to one of the gate line and the data line and spaced apart from one of the gate line and the data line. The storage capacitor is used to hold the voltage of the gate of the TFT Tr in one frame.

[0057] The passivation layer 150 is formed to cover the TFT Tr. The passivation layer 150 includes a drain contact hole 152 that exposes the drain 142 of the TFT Tr.

[0058] A first electrode 160 is formed in each pixel respectively. The first electrode 160 is connected to the drain 142 of the TFT Tr via the drain contact hole 152. The first electrode 160 can be an anode and can be formed of a conductive material having a relatively high work function. For example, the first electrode 160 can be formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0059] When the OLED device 100 operates in a top-emitting type, a reflective electrode or a reflective layer can be formed below the first electrode 160. For example, the reflective electrode or the reflective layer can be formed of an aluminum-palladium-copper (APC) alloy.

[0060] The bank layer 166 is formed on the passivation layer 150 to cover the edge of the first electrode 160. That is, the bank layer 166 is located at the boundary of the pixel and exposes the center of the first electrode 160 in the pixel.

[0061] The organic light-emitting layer 162 is formed on the first electrode 160. The organic light-emitting layer 162 may have a single-layer structure composed of a light-emitting material layer (EML) including a light-emitting material. In order to improve the light-emitting efficiency of the OLED D and / or the organic light-emitting display device 100, the organic light-emitting layer 162 may have a multi-layer structure. For example, the organic light-emitting layer 162 may include an EML, an electron blocking layer (EBL) located between the first electrode 160 and the EML, and a hole blocking layer (HBL) located between the EML and the second electrode 164.

[0062] The organic light-emitting layer 162 is respectively located in each of the red pixel, the green pixel, and the blue pixel. As shown below, the organic light-emitting layer 162 in the blue pixel includes a first matrix of an anthracene derivative and a second matrix of a deuterated anthracene derivative, so that the light-emitting efficiency and lifespan of the OLED D in the blue pixel are improved.

[0063] In addition, the EBL includes an amine derivative as an electron blocking material, and the HBL includes at least one of an azine derivative and a benzimidazole derivative as a hole blocking material. Therefore, the lifespan of the OLED D and the organic light-emitting device 100 is further improved.

[0064] The second electrode 164 is formed above the substrate 110 on which the organic light-emitting layer 162 is formed. The second electrode 164 covers the entire surface of the display area and may be formed of a conductive material having a relatively low work function to serve as a cathode. For example, the second electrode 164 may be formed of aluminum (Al), magnesium (Mg), or an Al-Mg alloy.

[0065] The first electrode 160, the organic light-emitting layer 162, and the second electrode 164 constitute the OLED D.

[0066] An encapsulation film 170 is formed on the second electrode 164 to prevent moisture from penetrating into the OLED D. The encapsulation film 170 includes a first inorganic insulating layer 172, an organic insulating layer 174, and a second inorganic insulating layer 176 stacked in sequence, but is not limited thereto. The encapsulation film 170 may be omitted.

[0067] A polarizing plate (not shown) for reducing ambient light reflection may be disposed above the top-emitting type OLED D. For example, the polarizing plate may be a circular polarizing plate.

[0068] In addition, a cover window (not shown) may be attached to the encapsulation film 170 or the polarizing plate. In this case, the substrate 110 and the cover window are flexible, thereby providing a flexible display device.

[0069] Figure 3 is a schematic cross-sectional view of an OLED having a single light-emitting unit for an organic light-emitting display device according to a first embodiment of the present disclosure.

[0070] As Figure 3 shown in Figure 3 , the OLED D includes a first electrode 160 and a second electrode 164 facing each other, and an organic light-emitting layer 162 located therebetween. The organic light-emitting layer 162 includes an EML 240 located between the first electrode 160 and the second electrode 164, an EBL 230 located between the first electrode 160 and the EML 240, and an HBL 250 located between the EML 240 and the second electrode 164.

[0071] The first electrode 160 may be formed of a conductive material having a relatively high work function to serve as an anode. The second electrode 164 may be formed of a conductive material having a relatively low work function to serve as a cathode.

[0072] The organic light-emitting layer 162 may further include a hole transport layer (HTL) 220 located between the first electrode 160 and the EBL 230.

[0073] In addition, the organic light-emitting layer 162 may further include a hole injection layer (HIL) 210 located between the first electrode 160 and the HTL 220 and an electron injection layer (EIL) 260 located between the second electrode 164 and the HBL 250.

[0074] The EML 240 includes a first matrix 242 of an anthracene derivative, a second matrix 244 of a deuterated anthracene derivative, and a blue dopant (not shown) and provides blue emission.

[0075] The compound of the first matrix 242 may be represented by Formula 1:

[0076] Formula 1

[0077]

[0078] In Formula 1, R1 and R2 are each independently a C6-C 30 aryl or a C5-C 30 heteroaryl, L1 and L2 are each independently a C6-C 30 arylene group, "a" and "b" are each an integer of 0 or 1, and at least one of "a" and "b" is 0.

[0079] For example, R1 may be a phenyl group or a naphthyl group, and R2 may be a naphthyl group, a dibenzofuranyl group, or a fused dibenzofuranyl group. L1 and L2 may each independently be a phenylene group.

[0080] In one exemplary embodiment, the first matrix 242 may be one of the following compounds of Formula 2:

[0081] Formula 2

[0082]

[0083]

[0084]

[0085] The second matrix 244 may be a deuterated compound of the first matrix 242. That is, the hydrogen atoms of the first matrix 242 may be replaced by deuterium atoms to form the second matrix 244. Some or all of the hydrogen atoms of the compound of the first matrix 242 may be replaced by deuterium atoms.

[0086] For example, the compound of the second matrix 244 may be represented by Formula 3:

[0087] Formula 3

[0088]

[0089] In Formula 3, the definitions of R1, R2, L1, L2, a, and b are the same as those in Formula 1. In Formula 3, Dx, Dy, Dm, and Dn represent the number of deuterium atoms, and "x", "y", "m", and "n" are each independently a positive integer. For example, the sum of "x", "y", "m", and "n" may be 15 to 29.

[0090] In one exemplary embodiment, the second matrix 244 of Formula 3 may be a compound of one of the following of Formula 4:

[0091] Formula 4

[0092]

[0093]

[0094]

[0095] The compound of the blue dopant may be represented by Formula 5-1 or Formula 5-2, but is not limited thereto.

[0096] Formula 5-1

[0097]

[0098] In Formula 5-1, "c" and "d" are each independently an integer from 0 to 4, and "e" is an integer from 0 to 3. R 11 and R 12 are each independently selected from the group consisting of C1-C 20 alkyl, C6-C 30 aryl, C5-C 30 heteroaryl, and C6-C30 A group consisting of arylamines, or R 11 Two adjacent ones in, or R 12 Two adjacent ones in form a fused aromatic ring or heteroaromatic ring. R 13 Is selected from the group consisting of C1-C 10 Alkyl, C6-C 30 Aryl, C5-C 30 Heteroaryl, and C6-C 30 A group consisting of arylamines. X1 and X2 are each independently oxygen (O) or NR 14 , and R 14 Is C6-C 30 Aryl.

[0099] Formula 5-2

[0100]

[0101] In Formula 5-2, Ar1, Ar2, Ar3, and Ar4 are each independently selected from the group consisting of C6-C 30 Aryl and C5-C 30 A group consisting of heteroaryl, and R1 and R2 are each independently selected from the group consisting of hydrogen, C1-C 20 Alkyl, and C6-C 30 A group consisting of aryl. For example, Ar1, Ar2, Ar3, and Ar4 can each independently be selected from the group consisting of phenyl, dibenzofuranyl, naphthyl, and biphenyl, and can be substituted with trifluoromethyl, cyano, or fluorine (F). R1 and R2 can each independently be selected from the group consisting of hydrogen, isopropyl, and phenyl.

[0102] For example, the blue dopant in Formula 5-1 can be a compound of one of the following in Formula 6-1:

[0103] Formula 6-1

[0104]

[0105]

[0106]

[0107]

[0108]

[0109]

[0110]

[0111]

[0112]

[0113]

[0114]

[0115]

[0116]

[0117] For example, the blue dopant of Formula 5-2 can be a compound of one of the following of Formula 6-2:

[0118] Formula 6-2

[0119]

[0120]

[0121]

[0122]

[0123] EBL 230 includes an amine derivative as an electron blocking material. The material of EBL 230 can be represented by Formula 7:

[0124] Formula 7

[0125]

[0126] In Formula 7, R1, R2, R3, and R4 are each independently selected from the group consisting of a monocyclic aryl or a polycyclic aryl, and at least one of R1, R2, R3, and R4 is a polycyclic aryl. For example, two of R1, R2, R3, and R4 can be polycyclic aryls. The monocyclic aryl can be a phenyl, and the polycyclic aryl can be a fused aryl. The polycyclic aryl can be an aryl in which at least two phenyls are fused.

[0127] The electron blocking material of Formula 7 can be a compound of one of the following of Formula 8:

[0128] Formula 8

[0129]

[0130]

[0131] HBL 250 can include an azine derivative as a hole blocking material. For example, the material of HBL 250 can be represented by Formula 9:

[0132] Formula 9

[0133]

[0134] In Formula 9, Y1 to Y5 are each independently CR1 or N, and one to three of Y1 to Y5 are N. R1 is independently hydrogen or C6-C 30 aryl. L is C6-C 30 arylene, R2 is C6-C 30 aryl or C5-C 30 heteroaryl. R3 is hydrogen, or two adjacent ones of R3 form a fused ring. "a" is 0 or 1, "b" is 1 or 2, and "c" is an integer from 0 to 4.

[0135] The hole-blocking material of Formula 9 can be a compound of one of the following of Formula 10:

[0136] Formula 10

[0137]

[0138]

[0139] Alternatively, HBL 250 can include a benzimidazole derivative as the hole-blocking material. For example, the material of HBL 250 can be represented by Formula 11:

[0140] Formula 11

[0141]

[0142] In Formula 11, Ar is C 10 -C 30 arylene, R1 is C6-C 30 aryl or C5-C 30 heteroaryl, R2 is C1-C 10 alkyl or C6-C 30 aryl.

[0143] For example, Ar can be naphthylene or anthrylene, R1 can be benzimidazole or phenyl, and R2 can be methyl, ethyl or phenyl.

[0144] The hole-blocking material of Formula 11 can be one of the following of Formula 12:

[0145] Formula 12

[0146]

[0147] The HBL 250 may include one of the hole blocking materials of Formula 9 and the hole blocking materials of Formula 11.

[0148] In this case, the thickness of the EML 240 may be greater than the thickness of the EBL 230 and the thickness of the HBL 250, and may be less than the thickness of the HTL 220. For example, the thickness of the EML may be about to The thickness of each of the EBL 230 and the HBL 250 may be about to The thickness of the HTL 220 may be about to The EBL 230 and the HBL 250 may have the same thickness.

[0149] The HBL 250 may include both the hole blocking materials of Formula 9 and the hole blocking materials of Formula 11. For example, in the HBL 250, the hole blocking materials of Formula 9 and the hole blocking materials of Formula 11 may have the same weight %.

[0150] In this case, the thickness of the EML 240 may be greater than the thickness of the EBL 230, and may be less than the thickness of the HBL 250. In addition, the thickness of the HBL 250 may be less than the thickness of the HTL 220. For example, the thickness of the EML may be about to of the thickness, the thickness of the EBL 230 may be about to of the thickness. The thickness of the HBL 250 may be about to The thickness of the HTL 220 may be about to of the thickness.

[0151] The hole blocking materials of Formula 9 and / or the hole blocking materials of Formula 11 have electron transport properties such that the electron transport layer can be omitted. As a result, the HBL 250 directly contacts the EIL 260 or the second electrode 164 without the EIL 260.

[0152] In the OLED D of the present disclosure, the weight percentage of the first matrix 242 to the second matrix 244 can be from about 1:9 to about 9:1, preferably from about 1:9 to about 7:3. To provide sufficient luminous efficiency and lifespan for the OLED D and the organic light-emitting display device, the weight percentage of the first matrix 242 to the second matrix 244 can be about 3:7. On the other hand, to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first matrix 242 to the second matrix 244 can be about 7:3. The OLED D and the organic light-emitting display device of the present disclosure have advantages in terms of luminous efficiency and lifespan.

[0153] In addition, when the EML 240 includes the blue dopant of Formula 5-1, an image with a narrow full width at half maximum (FWHM) and high color purity is provided.

[0154] In addition, the EBL 230 includes an amine derivative as an electron blocking material, and the HBL 250 includes at least one of an azine derivative and a benzimidazole derivative as a hole blocking material. Therefore, the lifespan of the OLED D and the organic light-emitting device 100 is further improved. <s

[0155] [Synthesis of the first matrix]

[0156] 1. Synthesis of Compound Matrix 1

[0157] [Reaction Scheme 1]

[0158]

[0159] In a drying oven, 10-bromo-9-(naphthalen-3-yl)anthracene (2.00 g, 5.23 mmol), 4,4,5,5-tetramethyl-2-(naphthalen-1-yl)-1,3,2-dioxaborolane (1.45 g, 5.74 mmol), tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3) (0.24 g, 0.26 mmol), and toluene (50 mL) were added to a flask (250 mL). The reaction flask was removed from the drying oven, and anhydrous sodium carbonate (20 mL, 2 M) was added to the flask. The reactants were stirred and heated at 90 °C overnight while monitoring the reaction by HPLC (high-performance liquid chromatography). The reaction flask was cooled to room temperature, and then the organic layer was separated from the aqueous layer. The aqueous layer was washed with dichloromethane (DCM), and the organic layer was concentrated using a rotary evaporator to obtain a gray powder. The gray powder was purified using alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain white powder of Compound Matrix 1 (2.00 g, yield: 89%).

[0160] 2. Synthesis of Compound Matrix 2

[0161] [Reaction Scheme 2]

[0162]

[0163] In a drying oven, 10-bromo-9-(naphthalen-3-yl)anthracene (2.00 g, 5.23 mmol), 4,4,5,5-tetramethyl-2-(4-(naphthalen-4-yl)phenyl)-1,3,2-dioxaborolane (1.90 g, 5.74 mmol), Pd2(dba)3 (0.24 g, 0.26 mmol) and toluene (50 mL) were added to a flask (250 mL). The reaction flask was removed from the drying oven, and anhydrous sodium carbonate (20 mL, 2 M) was added to the flask. The reactants were stirred and heated at 90 °C overnight while monitoring the reaction by HPLC. The reaction flask was cooled to room temperature, and then the organic layer was separated from the aqueous layer. The aqueous layer was washed twice with dichloromethane (DCM), and the organic layer was concentrated using a rotary evaporator to obtain a gray powder. The gray powder was purified by alumina, precipitated with hexane, and column chromatography was performed using silica gel to obtain the compound matrix 2 as a white powder (2.28 g, yield: 86%).

[0164] 3. Synthesis of compound matrix 3

[0165] [Reaction formula 3]

[0166]

[0167] In a drying oven, 10-bromo-9-(naphthalen-3-yl)anthracene (2.00 g, 5.23 mmol), 4,4,5,5-tetramethyl-2-(dibenzofuran-1-yl)-1,3,2-dioxaborolane (1.69 g, 5.74 mmol), Pd2(dba)3 (0.24 g, 0.26 mmol) and toluene (50 mL) were added to a flask (250 mL). The reaction flask was removed from the drying oven, and anhydrous sodium carbonate (20 mL, 2 M) was added to the flask. The reactants were stirred and heated at 90 °C overnight while monitoring the reaction by HPLC. The reaction flask was cooled to room temperature, and then the organic layer was separated from the aqueous layer. The aqueous layer was washed twice with dichloromethane (DCM), and the organic layer was concentrated using a rotary evaporator to obtain a gray powder. The gray powder was purified by alumina, precipitated with hexane, and column chromatography was performed using silica gel to obtain the compound matrix 3 as a white powder (1.91 g, yield: 78%).

[0168] 4. Synthesis of compound matrix 4

[0169] [Reaction formula 4]

[0170]

[0171] In an oven, 10-bromo-9-(naphthalen-3-yl)anthracene (2.00 g, 5.23 mmol), 4,4,5,5-tetramethyl-2-(dibenzofuran-1-yl)phenyl-1,3,2-dioxaborolane (2.12 g, 5.74 mmol), Pd2(dba)3 (0.24 g, 0.26 mmol) and toluene (50 mL) were added to a flask (250 mL). The reaction flask was removed from the oven, and anhydrous sodium carbonate (20 mL, 2 M) was added to the flask. The reactants were stirred and heated at 90 °C overnight while monitoring the reaction by HPLC. The reaction flask was cooled to room temperature, and then the organic layer was separated from the aqueous layer. The aqueous layer was washed twice with dichloromethane (DCM), and the organic layer was concentrated using a rotary evaporator to obtain a gray powder. The gray powder was purified with alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain the compound matrix 3 as a white powder (2.31 g, yield: 82%).

[0172] [Synthesis of the second matrix]

[0173] 1. Synthesis of compound matrix 32

[0174] [Reaction formula 5]

[0175]

[0176] Under N2 conditions, AlCl3 (0.48 g, 3.6 mmol) was added to a solution of compound matrix 2 (5 g, 9.87 mmol) in perdeuterated benzene solution (100 mL). The mixture was stirred at room temperature for 6 hours, and D2O (50 mL) was added. After separating the aqueous layer and the organic layer, the aqueous layer was washed with CH2Cl2 (30 mL). The resulting organic layer was dried over magnesium sulfate and the volatiles were removed by rotary evaporation. The crude product was purified by column chromatography to obtain compound matrix 32 as a white powder (4.5 g).

[0177] 2. Synthesis of compound matrix 34

[0178] [Reaction formula 6]

[0179]

[0180] Under N2 conditions, AlCl3 (0.48 g, 3.6 mmol) was added to a solution of compound matrix 4 (5 g, 9.15 mmol) in perdeuterated benzene (100 mL). The mixture was stirred at room temperature for 6 hours, and D2O (50 mL) was added. After separating the aqueous layer and the organic layer, the aqueous layer was washed with CH2Cl2 (30 mL). The resulting organic layer was dried over magnesium sulfate, and the volatiles were removed by rotary evaporation. The crude product was purified by column chromatography to obtain compound matrix 34 (4.8 g) as a white powder.

[0181] [Synthesis of Blue Dopant]

[0182] 1. Synthesis of Compound Dopant 56

[0183] (1) 3-Nitro-N,N-diphenylamine

[0184] [Reaction Scheme 7-1]

[0185]

[0186] Under N2 conditions, a flask containing 3-nitroaniline (25.0 g), iodobenzene (81.0 g), copper iodide (3.5 g), potassium carbonate (100.0 g) and o-dichlorobenzene (250 mL) was heated and stirred for 14 hours. The reaction solution was cooled to room temperature, and ammonia water was added for liquid-liquid separation. The obtained product was purified by silica gel column chromatography (developing solution: toluene / heptane = 3 / 7 (volume ratio)) to obtain 3-nitro-N,N-diphenylamine (44.0 g).

[0187] (2) N1,N1-Diphenylbenzene-1,3-diamine

[0188] [Reaction Scheme 7-2]

[0189]

[0190] Under N2 conditions, acetic acid cooled in an ice bath was added and stirred. 3-Nitro-N,N-diphenylamine (44.0 g) was dropped into this solution to avoid a significant increase in the reaction temperature. After the addition was completed, the mixture was stirred at room temperature for 30 minutes, and the disappearance of the starting material was checked. After the reaction was completed, the supernatant was collected by decantation, neutralized with sodium carbonate, and extracted with ethyl acetate. The obtained product was purified by silica gel column chromatography (developing solution: toluene / heptane = 9 / 1 (volume ratio)). After removing the solvent by distillation under reduced pressure, heptane was added and re-precipitated to obtain N1,N1-diphenylbenzene-1,3-diamine (36.0 g).

[0191] (3) N1,N1,N3-Triphenylbenzene-1,3-diamine

[0192] [Reaction formula 7-3]

[0193]

[0194] Under N2 condition, a flask containing N1,N1-diphenylbenzene-1,3-diamine (60.0 g), Pd-132 (1.3 g), NaOtBu (33.5 g) and xylene (300 mL) was heated and stirred at 120 °C. A solution of bromobenzene (36.2 g) in xylene (50 ml) was slowly added dropwise to this solution. After the addition was completed, the mixture was heated and stirred for 1 hour. After cooling the mixture to room temperature, water and ethyl acetate were added for liquid-liquid separation. The resulting product was purified by silica gel column chromatography (developing solution: toluene / heptane = 5 / 5 (volume ratio)) to obtain N1,N1,N3-triphenylbenzene-1,3-diamine (73.0 g).

[0195] (4) N1,N1'-(2-chloro-1,3-phenylene)bis(N1,N3,N3-triphenylbenzene-1,3-diamine)

[0196] [Reaction formula 7-4]

[0197]

[0198] Under N2 condition, a flask containing N1,N1,N3-triphenylbenzene-1,3-diamine (20.0 g), 1-bromo-2,3-dichlorobenzene (6.4 g), Pd-132 (0.2 g), NaOtBu (sodium tert-butoxide, 6.8 g) and xylene (70 mL) was heated and stirred at 120 °C for 2 hours. After cooling the mixture to room temperature, water and ethyl acetate were added for liquid-liquid separation. The resulting product was purified by silica gel column chromatography (developing solution: toluene / heptane = 4 / 6 (volume ratio)) to obtain N1,N1'-(2-chloro-1,3-phenylene)bis(N1,N3,N3-triphenylbenzene-1,3-diamine) (15.0 g).

[0199] (5) Dopant 56

[0200] [Reaction formula 7-5]

[0201]

[0202] Under N2 conditions, 1.7 M tert-butyllithium pentane solution (18.1 ml) was added to a flask containing N1,N1'-(2-chloro-1,3-phenylene)bis(N1,N3,N3-triphenylbenzene-1,3-diamine) (12.0 g) and tert-butylbenzene (100 mL) cooled in an ice bath. After heating to 60 °C and stirring for 2 hours, the components with boiling points lower than tert-butylbenzene were distilled off under reduced pressure. The mixture was cooled to -50 °C, and boron tribromide (2.9 mL) was added. The mixture was heated to room temperature and stirred for 0.5 hour. The mixture was cooled again in an ice bath, and N,N-diisopropylethylamine (5.4 mL) was added. The mixture was stirred at room temperature until the exothermic reaction ended. The mixture was heated to a temperature of 120 °C and stirred for 3 hours. The solution was cooled to room temperature, and an aqueous sodium acetate solution and ethyl acetate cooled in an ice bath were successively added to the solution. The insoluble solid was filtered and phase-separated. Then, the residue was purified by silica gel column chromatography (developing solution: toluene / heptane = 5 / 5 (volume ratio)). The mixture was washed with heated heptane and ethyl acetate, and then reprecipitated with a mixed solvent of toluene and ethyl acetate to obtain dopant 56 (2.0 g).

[0203] Synthesis of Compound Dopant 167

[0204] (1) 3,3”-((2-Bromo-1,3-phenylene)bis(oxy))di-1,1'-biphenyl

[0205] [Reaction Scheme 8-1]

[0206]

[0207] Under N2 conditions, a flask containing 2-bromo-1,3-difluorobenzene (12.0 g), [1,1'-biphenyl]-3-ol (23.0 g), potassium carbonate (34.0 g), and NMP (130 mL) was heated and stirred at 170 °C for 10 hours. After the reaction stopped, the reaction solution was cooled to room temperature, and water and toluene were added for liquid-liquid separation. The solvent was removed by distillation under reduced pressure, and the resulting product was purified by silica gel column chromatography (developing solution: heptane / toluene = 7 / 3 (volume ratio)) to obtain 3,3”-((2-bromo-1,3-phenylene)bis(oxy))di-1,1'-biphenyl (26.8 g).

[0208] (2) Dopant 167

[0209] [Reaction Scheme 8-2]

[0210]

[0211] Under N2 conditions, a flask containing 3,3”-((2-bromo-1,3-phenylene)bis(oxy))di-1,1’-biphenyl (14.0 g) and xylene (100 mL) was cooled to -40 °C, and a solution of n-butyllithium in hexane (2.6 M, 11.5 mL) was added dropwise. After heating the mixture to room temperature, the mixture was cooled again to -40 °C, and boron tribromide (3.3 mL) was added thereto. The mixture was heated to room temperature and stirred for 13 hours. The mixture was cooled to 0 °C, and N,N-diisopropylethylamine (9.7 ml) was added. The mixture was heated and stirred at 130 °C for 5 hours. The reaction solution was cooled to room temperature, an aqueous solution of sodium acetate cooled in an ice bath was added and stirred. The precipitated solid was collected by suction filtration, and the obtained solid was washed successively with water, methanol, and heptane, and recrystallized from chlorobenzene to obtain compound dopant 167 (8.9 g).

[0212] [Organic Light-Emitting Diode]

[0213] Deposit an anode (ITO, ), HIL (Formula 13 (97 wt%) and Formula 14 (3 wt%), ), HTL (Formula 13, ), EBL (Formula 15, ), EML (host (98 wt%) and dopant (2 wt%), ), HBL (Formula 16, ), EIL (Formula 17 (98 wt%) and Li (2 wt%), ), and a cathode (Al, ) in sequence to form an OLED.

[0214] [Formula 13]

[0215]

[0216] [Formula 14]

[0217]

[0218] [Formula 15]

[0219]

[0220] [Formula 16]

[0221]

[0222] [Formula 17]

[0223]

[0224] 1. Comparative Example

[0225] (1) Comparative Example 1 (Ref1)

[0226] The compound "Dopant 56" in Formula 6-1 was used as a dopant, and the compound "Matrix 2" was used as a matrix.

[0227] (2) Comparative Example 2 (Ref2)

[0228] The compound "Dopant 1" in Formula 6-2 was used to replace the compound "Dopant 56" in Formula 6-1 of Comparative Example 1.

[0229] (3) Comparative Example 3 (Ref3)

[0230] The compound "Matrix 4" was used to replace the compound "Matrix 2" of Comparative Example 1.

[0231] (4) Comparative Example 4 (Ref4)

[0232] The compound "Matrix 4" was used to replace the compound "Matrix 2" of Comparative Example 2.

[0233] (5) Comparative Example 5 (Ref5)

[0234] The compound "Matrix 32" was used to replace the compound "Matrix 2" of Comparative Example 1.

[0235] (6) Comparative Example 6 (Ref6)

[0236] The compound "Matrix 32" was used to replace the compound "Matrix 2" of Comparative Example 2.

[0237] (7) Comparative Example 7 (Ref7)

[0238] The compound "Matrix 34" was used to replace the compound "Matrix 2" of Comparative Example 1.

[0239] (8) Comparative Example 8 (Ref8)

[0240] The compound "Matrix 34" was used to replace the compound "Matrix 2" of Comparative Example 2.

[0241] 2. Examples

[0242] (1) Example 1 (Ex1)

[0243] The compound "Dopant 56" in Formula 6-1 was used as a dopant, and the compounds "Matrix 2" and "Matrix 32" were used as matrices. ("Matrix 2": "Matrix 32" = 9:1 (weight percentage))

[0244] (2) Example 2 (Ex2)

[0245] Change the weight percentage of "Matrix 2" to "Matrix 32" from Example 1 to 7:3. ("Matrix 2": "Matrix 32" = 7:3 (weight percentage))

[0246] (3) Example 3 (Ex3)

[0247] Change the weight percentage of "Matrix 2" to "Matrix 32" from Example 1 to 5:5. ("Matrix 2": "Matrix 32" = 5:5 (weight percentage))

[0248] (4) Example 4 (Ex4)

[0249] Change the weight percentage of "Matrix 2" to "Matrix 32" from Example 1 to 3:7. ("Matrix 2": "Matrix 32" = 3:7 (weight percentage))

[0250] (5) Example 5 (Ex5)

[0251] Change the weight percentage of "Matrix 2" to "Matrix 32" from Example 1 to 1:9. ("Matrix 2": "Matrix 32" = 1:9 (weight percentage))

[0252] (6) Examples 6 to 10 (Ex6 to Ex10)

[0253] Use the compound "Dopant 1" in Formula 6-2 to replace the compound "Dopant 56" in Examples 1 to 5.

[0254] (7) Example 11 (Ex11)

[0255] Use the compound "Dopant 56" in Formula 6-1 as the dopant, and use the compounds "Matrix 4" and "Matrix 34" as the matrix. ("Matrix 4": "Matrix 34" = 9:1 (weight percentage))

[0256] (8) Example 12 (Ex12)

[0257] Change the weight percentage of "Matrix 4" to "Matrix 34" from Example 11 to 7:3. ("Matrix 4": "Matrix 34" = 7:3 (weight percentage))

[0258] (9) Example 13 (Ex13)

[0259] Change the weight percentage of "Matrix 4" to "Matrix 34" from Example 11 to 5:5. ("Matrix 4": "Matrix 34" = 5:5 (weight percentage))

[0260] (10) Example 14 (Ex14)

[0261] Change the weight percentage of “Matrix 4” to “Matrix 34” from that in Example 11 to 3:7. (“Matrix 4”:“Matrix 34” = 3:7 (weight percentage))

[0262] (11) Example 15 (Ex15)

[0263] Change the weight percentage of “Matrix 4” to “Matrix 34” from that in Example 11 to 1:9. (“Matrix 4”:“Matrix 34” = 1:9 (weight percentage))

[0264] (12) Examples 16 to 20 (Ex16 to Ex20)

[0265] Use the compound “Dopant 1” in Formula 6-2 to replace the compound “Dopant 56” in Examples 11 to 15.

[0266] Measure the properties of the OLEDs fabricated in Comparative Examples 1 to 8 and Examples 1 to 20, namely voltage (V), efficiency (Cd / A), color coordinates (CIE), FWHM, and lifetime (T95), and list them in Tables 1 to 4.

[0267] Table 1

[0268]

[0269] Table 2

[0270]

[0271]

[0272] Table 3

[0273]

[0274] Table 4

[0275]

[0276]

[0277] As shown in Tables 1 to 4, compared with the OLEDs using the first matrix without using the second matrix in Comparative Examples 1 to 4, the lifetimes of the OLEDs using the first matrix (which is an anthracene derivative not substituted by deuterium) and the second matrix (which is an anthracene derivative substituted by deuterium) in Examples 1 to 20 are significantly increased.

[0278] In addition, compared with the OLEDs using the second matrix without using the first matrix in Comparative Examples 5 to 8, the lifetimes of the OLEDs in Examples 5, 10, 15, and 20 are slightly reduced, but the luminous efficiencies of the OLEDs in Examples 5, 10, 15, and 20 are improved.

[0279] Therefore, in the OLEDs of the present disclosure, the weight percentage of the first matrix to the second matrix can be approximately 1:9 to 7:3. To provide sufficient luminous efficiency and lifespan for the OLEDs and the organic light-emitting display devices, the weight percentage of the first matrix to the second matrix can be approximately 3:7. On the other hand, to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first matrix to the second matrix can be approximately 7:3.

[0280] In the OLED D of the present disclosure, the EML 240 includes an anthracene derivative as the first matrix 242 and a deuterated anthracene derivative as the second matrix 244, such that the OLED D and the organic light-emitting display device 100 have advantages in terms of luminous efficiency and lifespan.

[0281] [Organic Light-Emitting Diode]

[0282] Deposit an anode (ITO, ), an HIL (Formula 18 (97 wt%) and Formula 14 (3 wt%), ), an HTL (Formula 18, ), an EBL an EML (matrix (98 wt%) and dopant (2 wt%), ), an HBL an EIL (Formula 17 (98 wt%) and Li (2 wt%), ), and a cathode (Al, ) in sequence to form an OLED.

[0283] [Formula 18]

[0284]

[0285] 1. Comparative Example

[0286] (1) Comparative Example 9 (Ref9)

[0287] Use the compound of Formula 19 to form the EBL, use the compound "Dopant 56" in Formula 6-1 as the dopant, use the compound "Matrix 2" in Formula 2 as the matrix, and use the compound "E1" in Formula 10 to form the HBL.

[0288] (2) Comparative Example 10 (Ref10)

[0289] Use the compound "H3" in Formula 8 to replace the compound of Formula 19 in Comparative Example 9.

[0290] (3) Comparative Example 11 (Ref11)

[0291] Use the compound "F1" in Formula 12 to replace the compound "E1" in Formula 10 in Comparative Example 9.

[0292] (4) Comparative Example 12 (Ref12)

[0293] Use the compound "F1" in Formula 12 to replace the compound "E1" in Formula 10 of Comparative Example 10.

[0294] (5) Comparative Examples 13 to 16 (Ref13 to Ref16)

[0295] Use the compound "Dopant 167" in Formula 6-1 to replace the compound "Dopant 56" in Comparative Examples 9 to 12.

[0296] (6) Comparative Examples 17 to 20 (Ref17 to Ref20)

[0297] Use the compound "Matrix 4" in Formula 2 to replace the compound "Matrix 2" in Comparative Examples 9 to 12.

[0298] (7) Comparative Examples 21 to 24 (Ref21 to Ref24)

[0299] Use the compound "Matrix 4" in Formula 2 to replace the compound "Matrix 2" in Comparative Examples 13 to 16.

[0300] [Formula 19]

[0301]

[0302] 2. Examples

[0303] (1) Example 21 (Ex21)

[0304] Use the compound "H3" in Formula 8 to form the EBL, use the compound "Dopant 56" in Formula 6-1 as the dopant, use the compounds "Matrix 2" and "Matrix 32" as the matrix, and use the compound "E1" in Formula 10 to form the HBL. ("Matrix 2": "Matrix 32" = 3:7 (weight percentage))

[0305] (2) Example 22 (Ex22)

[0306] Use the compound "F1" in Formula 12 to replace the compound "E1" in Formula 10 of Comparative Example 21.

[0307] (3) Example 23 (Ex23)

[0308] Use the compound "Dopant 167" in Formula 6-1 to replace the compound "Dopant 56" in Comparative Example 21.

[0309] (4) Example 24 (Ex24)

[0310] Replace the compound "Dopant 56" in Comparative Example 22 with the compound "Dopant 167" in Formula 6-1.

[0311] (5) Example 25 (Ex25)

[0312] Use the compound "H3" in Formula 8 to form the EBL, use the compound "Dopant 56" in Formula 6-1 as the dopant, use the compounds "Matrix 4" and "Matrix 34" as the matrices, and use the compound "E1" in Formula 10 to form the HBL. ("Matrix 4": "Matrix 34" = 3:7 (weight percentage))

[0313] (6) Example 26 (Ex26)

[0314] Replace the compound "E1" in Formula 10 in Comparative Example 25 with the compound "F1" in Formula 12.

[0315] (7) Example 27 (Ex27)

[0316] Replace the compound "Dopant 56" in Comparative Example 25 with the compound "Dopant 167" in Formula 6-1.

[0317] (8) Example 28 (Ex28)

[0318] Replace the compound "Dopant 56" in Comparative Example 26 with the compound "Dopant 167" in Formula 6-1.

[0319] Measure the properties of the OLEDs fabricated in Comparative Examples 9 to 24 and Examples 21 to 28, namely voltage (V), efficiency (Cd / A), color coordinates (CIE), and lifetime (T95), and list them in Tables 5 and 6.

[0320] Table 5

[0321]

[0322] Table 6

[0323]

[0324]

[0325] As shown in Tables 5 and 6, compared with the OLEDs in Comparative Examples 9, 11, 13, 15, 17, 19, 21, and 23, the characteristics of the driving voltage, luminous efficiency, and lifetime of the OLEDs in Comparative Examples 10, 12, 14, 16, 18, 20, 22, and 24 are improved. In Comparative Examples 10, 12, 14, 16, 18, 20, 22, and 24, the EBL includes an amine derivative of Formula 7, and the HBL includes an azine derivative of Formula 9 or a benzimidazole derivative of Formula 11.

[0326] In addition, when the EML of the OLED includes a first matrix of Formula 1 which is an anthracene derivative and a second matrix of Formula 3 which is an anthracene derivative substituted with deuterium as in Examples 25 to 28, the luminous efficiency and lifespan are further improved.

[0327] [Organic Light-Emitting Diode]

[0328] Deposit an anode (ITO, ), an HIL (97 wt% of Formula 18 and 3 wt% of Formula 14, ), an HTL (Formula 18, ), an EBL an EML (matrix (98 wt%) and dopant (2 wt%), ), an HBL an EIL (LiF, ), and a cathode (Al, ) in sequence to form an OLED.

[0329] 1. Comparative Example

[0330] (1) Comparative Example 25 (Ref25)

[0331] Use the compound of Formula 19 to form the EBL, use the compound "Dopant 56" in Formula 6-1 as the dopant, use the compound "Matrix 2" in Formula 2 as the matrix, and use the compound "E16" in Formula 10 and the compound "F1" in Formula 12 to form the HBL. ("E16": "F1" = 1:1 (weight percentage))

[0332] (2) Comparative Example 26 (Ref26)

[0333] Use the compound of Formula 20 to replace the compound of Formula 19 in Comparative Example 25.

[0334] (3) Comparative Example 27 (Ref27)

[0335] Use the compound "H3" of Formula 8 to replace the compound of Formula 19 in Comparative Example 25.

[0336] (4) Comparative Example 28 (Ref28)

[0337] Use the compound of Formula 19 to form the EBL, use the compound "Dopant 56" in Formula 6-1 as the dopant, use the compound "Matrix 4" in Formula 2 as the matrix, and use the compound "E16" in Formula 10 and the compound "F1" in Formula 12 to form the HBL. ("E16": "F1" = 1:1 (weight percentage))

[0338] (5) Comparative Example 29 (Ref29)

[0339] Replace the compound of Formula 19 in Comparative Example 28 with the compound of Formula 20.

[0340] (6) Comparative Example 30 (Ref30)

[0341] Replace the compound of Formula 19 in Comparative Example 28 with the compound “H3” of Formula 8.

[0342] [Formula 20]

[0343]

[0344] 2. Examples

[0345] (1) Example 29 (Ex29)

[0346] Use the compound “H3” of Formula 8 to form the EBL, use the compound “Dopant 56” of Formula 6-1 as the dopant, use the compounds “Matrix 2” and “Matrix 32” as the matrix, and use the compound “E16” of Formula 10 and the compound “F1” of Formula 12 to form the HBL. (“Matrix 2”: “Matrix 32” = 3:7 (weight percentage), “E16”: “F1” = 1:1 (weight percentage))

[0347] (2) Example 30 (Ex30)

[0348] Use the compound “H3” of Formula 8 to form the EBL, use the compound “Dopant 56” of Formula 6-1 as the dopant, use the compounds “Matrix 4” and “Matrix 34” as the matrix, and use the compound “E16” of Formula 10 and the compound “F1” of Formula 12 to form the HBL. (“Matrix 4”: “Matrix 34” = 3:7 (weight percentage), “E16”: “F1” = 1:1 (weight percentage))

[0349] Measure the properties of the OLEDs fabricated in Comparative Examples 25 to 30 and Examples 29 and 30, namely voltage (V), efficiency (Cd / A), color coordinates (CIE), and lifetime (T95), and list them in Table 7.

[0350] Table 7

[0351]

[0352] As shown in Table 7, compared with the OLEDs in Comparative Examples 25, 26, 28, and 29, the luminous efficiency of the OLEDs in Comparative Examples 27 and 30 is improved, and the lifetime of the OLEDs in Comparative Examples 27 and 30 is significantly increased.

[0353] In addition, when the EML of the OLED includes a first matrix of Formula 1 which is an anthracene derivative and a second matrix of Formula 3 which is a deuterium-substituted anthracene derivative, as in Examples 29 and 30, the luminous efficiency and lifespan are further improved.

[0354] Figure 4 is a schematic cross-sectional view showing an OLED having a tandem structure with two light-emitting units according to a first embodiment of the present disclosure.

[0355] As Figure 4 shown, the OLED D includes a first electrode 160 and a second electrode 164 facing each other, and an organic light-emitting layer 162 located between the first electrode 160 and the second electrode 164. The organic light-emitting layer 162 includes a first light-emitting portion 310 having a first EML 320, a second light-emitting portion 330 having a second EML 340, and a charge generation layer (CGL) 350 located between the first light-emitting portion 310 and the second light-emitting portion 330.

[0356] The first electrode 160 may be formed of a conductive material having a relatively high work function to serve as an anode for injecting holes into the organic light-emitting layer 162. The second electrode 164 may be formed of a conductive material having a relatively low work function to serve as a cathode for injecting electrons into the organic light-emitting layer 162.

[0357] The CGL 350 is located between the first light-emitting portion 310 and the second light-emitting portion 330, and the first light-emitting portion 310, the CGL 350, and the second light-emitting portion 330 are sequentially stacked on the first electrode 160. That is, the first light-emitting portion 310 is located between the first electrode 160 and the CGL 350, and the second light-emitting portion 330 is located between the second electrode 164 and the CGL 350.

[0358] The first light-emitting portion 310 includes a first EML 320, a first EBL 316 located between the first electrode 160 and the first EML 320, and a first HBL 318 located between the first EML 320 and the CGL 350.

[0359] In addition, the first light-emitting portion 310 may further include a first HTL 314 located between the first electrode 160 and the first EBL 316 and a HIL 312 located between the first electrode 160 and the first HTL 314.

[0360] The first EML 320 includes a first matrix 322 which is an anthracene derivative, a second matrix 324 which is a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the first EML 320.

[0361] That is, the first EML 320 may include a compound of Formula 1 as the first matrix 322, a compound of Formula 3 as the second matrix 324, and a compound of Formula 5-1 or Formula 5-2 as the blue dopant.

[0362] In the first EML 320, the weight percentage of the first matrix 322 to the second matrix 324 may be from about 1:9 to about 9:1, preferably from about 1:9 to about 7:3. To provide sufficient luminous efficiency and lifespan of the OLED D and the organic light-emitting display device, the weight percentage of the first matrix 322 to the second matrix 324 may be about 3:7. On the other hand, to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first matrix 322 to the second matrix 324 may be about 7:3.

[0363] The first EBL 316 may include an electron blocking material of Formula 7. The first HBL 318 may include at least one of a hole blocking material of Formula 9 and a hole blocking material of Formula 11.

[0364] The second light-emitting part 330 includes a second EML 340, a second EBL 334 located between the CGL 350 and the second EML 340, and a second HBL 336 located between the second EML 340 and the second electrode 164.

[0365] In addition, the second light-emitting part 330 may further include a second HTL 332 located between the CGL 350 and the second EBL 334 and an EIL 338 located between the second HBL 336 and the second electrode 164.

[0366] The second EML 340 includes a first matrix 342 as an anthracene derivative, a second matrix 344 as a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the second EML 340.

[0367] That is, the second EML 340 may include a compound of Formula 1 as the first matrix 342, a compound of Formula 3 as the second matrix 344, and a compound of Formula 5-1 or Formula 5-2 as the blue dopant.

[0368] In the second EML 340, the weight percentage of the first matrix 342 to the second matrix 344 may be from about 1:9 to about 9:1, preferably from about 1:9 to about 7:3. To provide sufficient luminous efficiency and lifespan of the OLED D and the organic light-emitting display device, the weight percentage of the first matrix 342 to the second matrix 344 may be about 3:7. On the other hand, to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first matrix 342 to the second matrix 344 may be about 7:3.

[0369] The first matrix 342 of the second EML 340 may be the same as or different from the first matrix 322 of the first EML 320, and the second matrix 344 of the second EML 340 may be the same as or different from the second matrix 324 of the first EML 320. In addition, the blue dopant of the second EML 340 may be the same as or different from the blue dopant of the first EML 320.

[0370] The second EBL 334 may include the electron blocking material of Formula 7. The second HBL 336 may include at least one of the hole blocking material of Formula 9 and the hole blocking material of Formula 11.

[0371] The CGL 350 is located between the first light emitting part 310 and the second light emitting part 330. That is, the first light emitting part 310 and the second light emitting part 330 are connected by the CGL 350. The CGL 350 may be a PN junction CGL composed of an N-type CGL 352 and a P-type CGL 354.

[0372] The N-type CGL 352 is located between the first HBL 318 and the second HTL 332, and the P-type CGL 354 is located between the N-type CGL 352 and the second HTL 332.

[0373] In the OLED D, since both the first EML 320 and the second EML 340 include the first matrix 322 and 342 which are anthracene derivatives respectively and the second matrix 324 and 344 which are deuterated anthracene derivatives respectively, the OLED D and the organic light emitting display device 100 have advantages in terms of luminous efficiency and lifespan.

[0374] In addition, at least one of the first EBL 316 and the second EBL 334 includes the amine derivative of Formula 7, and at least one of the first HBL 318 and the second HBL 336 includes the hole blocking material of Formula 9 and the hole blocking material of Formula 11. As a result, the lifespan of the OLED D and the organic light emitting display device 100 is further improved.

[0375] In addition, since the first light emitting part 310 and the second light emitting part 330 for emitting blue light are stacked, the organic light emitting display device 100 provides an image with a high color temperature.

[0376] Figure 5 is a schematic cross-sectional view showing an organic light emitting display device according to a second embodiment of the present disclosure, Figure 6 is a schematic cross-sectional view showing an OLED for an organic light emitting display device according to a second embodiment of the present disclosure.

[0377] As in Figure 5As shown in FIG. 0, the organic light emitting display device 400 includes: a first substrate 410 that defines red pixels RP, green pixels GP, and blue pixels BP; a second substrate 470 facing the first substrate 410; an OLED D that is located between the first substrate 410 and the second substrate 470 and provides white emission; and a color filter layer 480 that is located between the OLED D and the second substrate 470.

[0378] Each of the first substrate 410 and the second substrate 470 may be a glass substrate or a plastic substrate. For example, each of the first substrate 410 and the second substrate 470 may be a polyimide substrate.

[0379] A buffer layer 420 is formed on the substrate, and a TFT Tr corresponding to each of the red pixel RP, the green pixel GP, and the blue pixel BP is formed on the buffer layer 420. The buffer layer 420 may be omitted.

[0380] A semiconductor layer 422 is formed on the buffer layer 420. The semiconductor layer 422 may include an oxide semiconductor material or polysilicon.

[0381] A gate insulating layer 424 is formed on the semiconductor layer 422. The gate insulating layer 424 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride.

[0382] A gate 430 formed of a conductive material such as metal is formed on the gate insulating layer 424 to correspond to the center of the semiconductor layer 422.

[0383] An interlayer insulating layer 432 formed of an insulating material is formed on the gate 430. The interlayer insulating layer 432 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride or an organic insulating material such as benzocyclobutene or optical acrylic.

[0384] The interlayer insulating layer 432 includes a first contact hole 434 and a second contact hole 436 that expose both sides of the semiconductor layer 422. The first contact hole 434 and the second contact hole 436 are located on both sides of the gate 430 and are spaced apart from the gate 430.

[0385] A source 440 and a drain 442 formed of a conductive material such as metal are formed on the interlayer insulating layer 432.

[0386] The source 440 and the drain 442 are spaced apart from each other with respect to the gate 430 and contact both sides of the semiconductor layer 422 via the first contact hole 434 and the second contact hole 436 respectively.

[0387] The semiconductor layer 422, the gate 430, the source 440, and the drain 442 constitute the TFT Tr. The TFT Tr serves as a driving element. That is, the TFT Tr may correspond to ( Figure 1driving TFT Td.

[0388] Although not shown, gate lines and data lines cross each other to define pixels, and switching TFTs are formed to be connected to the gate lines and the data lines. The switching TFTs are connected to TFT Tr serving as a driving element.

[0389] In addition, a power supply line and a storage capacitor may be further formed. The power supply line may be formed to be parallel to one of the gate lines and the data lines and spaced apart from one of the gate lines and the data lines. The storage capacitor is configured to hold the voltage of the gate of TFT Tr in one frame.

[0390] A passivation layer 450 is formed to cover TFT Tr. The passivation layer 450 includes a drain contact hole 452 exposing the drain 442 of TFT Tr.

[0391] A first electrode 460 is respectively formed in each pixel. The first electrode 460 is connected to the drain 442 of TFT Tr via the drain contact hole 452. The first electrode 460 may be an anode and may be formed of a conductive material having a relatively high work function. For example, the first electrode 460 may be formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0392] A reflective electrode or a reflective layer may be formed under the first electrode 460. For example, the reflective electrode or the reflective layer may be formed of an aluminum - palladium - copper (APC) alloy.

[0393] A bank layer 466 is formed on the passivation layer 450 to cover the edge of the first electrode 460. That is, the bank layer 466 is located at the boundary of the pixel and exposes the center of the first electrode 460 in the red pixel RP, the green pixel GP, and the blue pixel BP. The bank layer 466 may be omitted.

[0394] An organic light - emitting layer 462 is formed on the first electrode 460.

[0395] Refer to Figure 6 , the organic light - emitting layer 462 includes: a first light - emitting part 530 including a first EML 520; a second light - emitting part 550 including a second EML 540; a third light - emitting part 570 including a third EML 560; a first CGL 580 located between the first light - emitting part 530 and the second light - emitting part 550; and a second CGL 590 located between the second light - emitting part 550 and the third light - emitting part 570.

[0396] The first electrode 460 may be formed of a conductive material having a relatively high work function to serve as an anode for injecting holes into the organic light - emitting layer 462. The second electrode 464 may be formed of a conductive material having a relatively low work function to serve as a cathode for injecting electrons into the organic light - emitting layer 462.

[0397] The first CGL 580 is located between the first light-emitting part 530 and the second light-emitting part 550, and the second CGL 590 is located between the second light-emitting part 550 and the third light-emitting part 570. That is, the first light-emitting part 530, the first CGL 580, the second light-emitting part 550, the second CGL 590, and the third light-emitting part 570 are stacked on the first electrode 460 in sequence. In other words, the first light-emitting part 530 is located between the first electrode 460 and the first CGL 570, the second light-emitting part 550 is located between the first CGL 580 and the second CGL 590, and the third light-emitting part 570 is located between the second electrode 464 and the second CGL 590.

[0398] The first light-emitting part 530 may include an HIL 532, a first HTL 534, a first EBL 536, a first EML 520, and a first HBL 538 that are stacked on the first electrode 460 in sequence. That is, the HIL 532, the first HTL 534, and the first EBL 536 are located between the first electrode 460 and the first EML 520, and the first HBL 538 is located between the first EML 520 and the first CGL 580.

[0399] The first EML 520 includes a first matrix 522 that is an anthracene derivative, a second matrix 524 that is a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the first EML 520.

[0400] That is, the first EML 520 may include a compound of Formula 1 as the first matrix 522, a compound of Formula 3 as the second matrix 524, and a compound of Formula 5-1 or Formula 5-2 as the blue dopant.

[0401] In the first EML 520, the weight percentage of the first matrix 522 to the second matrix 524 may be from about 1:9 to about 9:1, preferably from about 1:9 to about 7:3. In order to provide sufficient OLED D and the luminous efficiency and lifespan of the organic light-emitting display device, the weight percentage of the first matrix 522 to the second matrix 524 may be about 3:7. On the other hand, in order to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first matrix 522 to the second matrix 524 may be about 7:3.

[0402] The first EBL 536 may include an electron blocking material of Formula 7. The first HBL 538 may include at least one of a hole blocking material of Formula 9 and a hole blocking material of Formula 11.

[0403] The second EML 550 may include a second HTL 552, a second EML 540, and an electron transport layer (ETL) 554. The second HTL 552 is located between the first CGL 580 and the second EML 540, and the ETL 554 is located between the second EML 540 and the second CGL 590.

[0404] The second EML 540 may be a yellow-green EML. For example, the second EML 540 may include a host and a yellow-green dopant. Alternatively, the second EML 540 may include a host, a red dopant, and a green dopant. In this case, the second EML 540 may include a lower layer including a host and a red dopant (or a green dopant) and an upper layer including a host and a green dopant (or a red dopant).

[0405] The third light-emitting unit 570 may include a third HTL 572, a second EBL 574, a third EML 560, a second HBL 576, and an EIL 578. The third EML 560 (or the third light-emitting unit 570) includes a first host 562 that is an anthracene derivative, a second host 564 that is a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the third EML 560.

[0406] That is, the third EML 560 may include a compound of Formula 1 as the first host 562, a compound of Formula 3 as the second host 564, and a compound of Formula 5-1 or Formula 5-2 as the blue dopant.

[0407] In the third EML 560, the weight percentage of the first host 562 to the second host 564 may be from about 1:9 to about 9:1, preferably from about 1:9 to about 7:3. In order to provide sufficient luminous efficiency and lifespan of the OLED D and the organic light-emitting display device, the weight percentage of the first host 562 to the second host 564 may be about 3:7. On the other hand, in order to increase the lifespan without reducing the luminous efficiency, the weight percentage of the first host 562 to the second host 564 may be about 7:3.

[0408] The first host 562 of the third EML 560 may be the same as or different from the first host 522 of the first EML 520, and the second host 564 of the third EML 560 may be the same as or different from the second host 524 of the first EML 520. In addition, the blue dopant of the third EML 560 may be the same as or different from the blue dopant of the first EML 520.

[0409] The second EBL 574 may include an electron blocking material of Formula 7. The second HBL 576 may include at least one of a hole blocking material of Formula 9 and a hole blocking material of Formula 11. The electron blocking material of the second EBL 574 may be the same as or different from the electron blocking material of the first EBL 536, and the hole blocking material of the second HBL 576 may be the same as or different from the hole blocking material of the first HBL 538.

[0410] The first CGL 580 is located between the first light-emitting part 530 and the second light-emitting part 550, and the second CGL 590 is located between the second light-emitting part 550 and the third light-emitting part 570. That is, the first light-emitting stack 530 and the second light-emitting stack 550 are connected by the first CGL 580, and the second light-emitting stack 550 and the third light-emitting stack 570 are connected by the second CGL 590. The first CGL 580 may be a PN junction CGL composed of a first N-type CGL 582 and a first P-type CGL 584, and the second CGL 590 may be a PN junction CGL composed of a second N-type CGL 592 and a second P-type CGL 594.

[0411] In the first CGL 580, the first N-type CGL 582 is located between the first HBL 538 and the second HTL 552, and the first P-type CGL 584 is located between the first N-type CGL 582 and the second HTL 552.

[0412] In the second CGL 590, the second N-type CGL 592 is located between the ETL 554 and the third HTL 572, and the second P-type CGL 594 is located between the second N-type CGL 592 and the third HTL 572.

[0413] In OLED D, since both the first EML 520 and the second EML 560 include a first matrix 522 and 562 that are each an anthracene derivative, a second matrix 524 and 564 that are each a deuterated anthracene derivative, and a blue dopant.

[0414] Therefore, OLED D including the first light-emitting part 530 and the third light-emitting part 570, and the second light-emitting part 550 that emits yellow-green light or red / green light can emit white light.

[0415] In Figure 6 OLED D has a three-layer stacked structure composed of a first light-emitting part 530, a second light-emitting part 550, and a third light-emitting part 570. Alternatively, OLED D may have a double-stacked structure without the first light-emitting part 530 or the third light-emitting part 570.

[0416] Referring again to Figure 5, a second electrode 464 is formed over a substrate 410 on which an organic light-emitting layer 462 is formed.

[0417] In the organic light-emitting display device 400, since the light emitted from the organic light-emitting layer 462 is incident on the color filter layer 480 via the second electrode 464, the second electrode 464 has a thin profile for transmitting light.

[0418] The first electrode 460, the organic light-emitting layer 462, and the second electrode 464 constitute the OLED D.

[0419] The color filter layer 480 is located above the OLED D and includes a red color filter 482, a green color filter 484, and a blue color filter 486 corresponding to a red pixel RP, a green pixel GP, and a blue pixel BP, respectively.

[0420] Although not shown, the color filter layer 480 may be attached to the OLED D by using an adhesive layer. Alternatively, the color filter layer 480 may be directly formed on the OLED D.

[0421] An encapsulation film (not shown) may be formed to prevent moisture from penetrating into the OLED D. For example, the encapsulation film may include a first inorganic insulating layer, an organic insulating layer, and a second inorganic insulating layer stacked in sequence, but is not limited thereto. The encapsulation film may be omitted.

[0422] A polarizing plate (not shown) for reducing ambient light reflection may be provided above the top-emitting OLED D. For example, the polarizing plate may be a circular polarizing plate.

[0423] In Figure 5 , the light from the OLED D passes through the second electrode 464, and the color filter layer 480 is disposed above or over the OLED D. Alternatively, when the light from the OLED D passes through the first electrode 460, the color filter layer 480 may be disposed between the OLED D and the first substrate 410.

[0424] A color conversion layer (not shown) may be formed between the OLED D and the color filter layer 480. The color conversion layer may include a red color conversion layer, a green color conversion layer, and a blue color conversion layer corresponding to the red pixel RP, the green pixel GP, and the blue pixel BP, respectively. The white light from the OLED D is converted into red light, green light, and blue light by the red color conversion layer, the green color conversion layer, and the blue color conversion layer, respectively.

[0425] As described above, the white light from the organic light-emitting diode D passes through the red color filter 482, the green color filter 484, and the blue color filter 486 in the red pixel RP, the green pixel GP, and the blue pixel BP, so that red light, green light, and blue light are provided from the red pixel RP, the green pixel GP, and the blue pixel BP, respectively.

[0426] In Figure 5 and Figure 6 , an OLED D that emits white light is used in a display device. Alternatively, the OLED D may be formed over the entire surface of a substrate without at least one of a driving element and a color filter layer to be used in a lighting device. A display device and a lighting device each including the OLED D of the present disclosure may be referred to as an organic light-emitting device.

[0427] Figure 7 is a schematic cross-sectional view showing an organic light-emitting display device according to a third embodiment of the present disclosure.

[0428] As shown in Figure 7 , an organic light-emitting display device 600 includes: a first substrate 610 that defines a red pixel RP, a green pixel GP, and a blue pixel BP; a second substrate 670 facing the first substrate 610; an OLED D that is located between the first substrate 610 and the second substrate 670 and provides white emission; and a color filter layer 680 located between the OLED D and the second substrate 670.

[0429] Although not shown, a color filter may be formed between the second substrate 670 and each color conversion layer 680.

[0430] TFTs Tr corresponding to each of the red pixel RP, the green pixel GP, and the blue pixel BP are formed on the first substrate 610, and a passivation layer 650 is formed to cover the TFTs Tr, the passivation layer 650 having a drain contact hole 652 that exposes an electrode (e.g., a drain) of the TFTs Tr.

[0431] The OLED D including a first electrode 660, an organic light-emitting layer 662, and a second electrode 664 is formed on the passivation layer 650. In this case, the first electrode 660 may be connected to the drain of the TFT Tr through the drain contact hole 652.

[0432] A bank layer 666 that covers an edge of the first electrode 660 is formed at a boundary of the red pixel region RP, the green pixel region GP, and the blue pixel region BP.

[0433] The OLED D emits blue light and may have Figure 3 or Figure 4 the structure shown in. That is, the OLED D is formed in each of the red pixel RP, the green pixel GP, and the blue pixel BP and provides blue light.

[0434] The color conversion layer 680 includes a first color conversion layer 682 corresponding to the red pixels RP and a second color conversion layer 684 corresponding to the green pixels GP. For example, the color conversion layer 680 may include an inorganic color conversion material such as quantum dots.

[0435] The blue light from the OLED D is converted into red light by the first color conversion layer 682 in the red pixels RP, and the blue light from the OLED D is converted into green light by the second color conversion layer 684 in the green pixels GP.

[0436] Accordingly, the organic light emitting display device 600 can display a full-color image.

[0437] On the other hand, when the light from the OLED D passes through the first substrate 610, the color conversion layer 680 is disposed between the OLED D and the first substrate 610.

[0438] Although the present disclosure has been described with reference to exemplary embodiments and examples, these embodiments and examples are not intended to limit the scope of the present disclosure. On the contrary, it will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the invention. Accordingly, it is intended that the present disclosure cover these modifications and variations of the present disclosure as long as they fall within the scope of the appended claims and their equivalents.

[0439] The various embodiments described above can be combined to provide other embodiments. All patents, patent application publications, patent applications, foreign patents, foreign patent applications, and non-patent publications mentioned in this specification and / or listed in the application data sheet are hereby incorporated by reference in their entirety. If concepts from various patents, applications, and publications are required to provide other embodiments, aspects of the embodiments can be modified.

[0440] These and other changes can be made to the embodiments in accordance with the above detailed description. Generally, in the following claims, the terms used should not be construed as limiting the claims to the specific embodiments disclosed in the specification and claims, but should be construed to include all possible embodiments and the full scope of equivalents to such claims. Accordingly, the claims are not limited by the disclosure.

Claims

1. An organic light-emitting diode (OLED), the organic light-emitting diode comprising: A first electrode; A second electrode facing the first electrode; A first light-emitting material layer located between the first electrode and the second electrode, the first light-emitting material layer comprising a first matrix, a second matrix, and a blue dopant; A first electron blocking layer located between the first electrode and the first light-emitting material layer, the first electron blocking layer comprising an electron blocking material of an amine derivative; And A first hole blocking layer located between the second electrode and the first light-emitting material layer, the first hole blocking layer comprising at least one of a first hole blocking material and a second hole blocking material, Wherein the first matrix is an anthracene derivative and the second matrix is a deuterated anthracene derivative, Wherein the first hole blocking material is an azine derivative and the second hole blocking material is a benzimidazole derivative, Wherein the first matrix is represented by Formula 1: Formula 1 wherein R1 and R2 are each independently naphthyl or dibenzofuranyl, L1 and L2 are each independently a C6-C 30 arylene group, a and b are each an integer of 0 or 1, and at least one of a and b is 0, and Wherein the second matrix is represented by Formula 3: Formula 3 Wherein the definitions of R1, R2, L1, L2, a, and b are the same as those in Formula 1, and Wherein x, y, m, and n are each independently positive integers, and the sum of x, y, m, and n is 15 to 29, Wherein the weight percentage of the first matrix to the second matrix is 9:1 to 7:3, Wherein the blue dopant is represented by Formula 5-1: Formula 5-1 Wherein, in Formula 5-1, c and d are each independently integers from 0 to 4, and e is an integer from 0 to 3, wherein R 11 and R 12 each independently selected from the group consisting of C1-C 20 alkyl, C6-C 30 aryl, and C6-C 30 arylamino wherein R 13 is selected from C1-C 10 alkyl, wherein X1 and X2 are each independently oxygen (O) or NR 14 , and R 14 is C6-C 30 aryl wherein the electron blocking material is Wherein the first hole blocking material is represented by Formula 9: Formula 9 wherein Y1 to Y5 are each independently CR1 or N, and one to three of Y1 to Y5 are N, wherein R1 is independently hydrogen or C6-C 30 aryl, wherein L is a C6-C 30 arylene group, R2 is a carbazolyl group or Wherein R3 is hydrogen, and Wherein, a is 0 or 1, b is 1 or 2, and c is an integer from 0 to 4, Wherein the second hole blocking material is represented by Formula 11: Formula 11 wherein Ar is an anthryl group, R1 is a C6-C 30 aryl group, and wherein R2 is C1-C 10 alkyl group.

2. The organic light-emitting diode according to claim 1, wherein the first matrix is a compound of one of the following of Formula 2: Formula 2 3. The organic light-emitting diode according to claim 1, wherein the weight percentage of the first matrix to the second matrix is 7:

3.

4. The organic light-emitting diode according to claim 1, wherein the first hole blocking material is a compound of one of the following of Formula 10: Formula 10 5. The organic light-emitting diode according to claim 1, wherein the second hole blocking material is a compound of one of the following of Formula 12: Formula 12 6. The organic light-emitting diode according to claim 1, the organic light-emitting diode further comprising: A second light-emitting material layer located between the first light-emitting material layer and the second electrode, the second light-emitting material layer comprising the first matrix, the second matrix, and the blue dopant; And A first charge generation layer between the first light-emitting material layer and the second light-emitting material layer.

7. The organic light-emitting diode according to claim 6, the organic light-emitting diode further comprising: A third light-emitting material layer located between the first charge generation layer and the second light-emitting material layer, the third light-emitting material layer emitting yellow-green light; And A second charge generation layer between the second light-emitting material layer and the third light-emitting material layer.

8. The organic light-emitting diode according to claim 6, wherein the organic light-emitting diode further comprises: a third light-emitting material layer located between the first charge generation layer and the second light-emitting material layer, the third light-emitting material layer emitting red light and green light; and a second charge generation layer between the second light-emitting material layer and the third light-emitting material layer.

9. An organic light-emitting device, comprising: a substrate; and an organic light-emitting diode located on the substrate, the organic light-emitting diode comprising a first electrode; a second electrode facing the first electrode; a first light-emitting material layer located between the first electrode and the second electrode, the first light-emitting material layer comprising a first matrix, a second matrix, and a first blue dopant; a first electron blocking layer located between the first electrode and the first light-emitting material layer, the first electron blocking layer comprising an electron blocking material of an amine derivative; and a first hole blocking layer located between the second electrode and the first light-emitting material layer, the first hole blocking layer comprising at least one of a first hole blocking material and a second hole blocking material, wherein the first matrix is an anthracene derivative, and the second matrix is a deuterated anthracene derivative, wherein the first hole blocking material is an azine derivative, and the second hole blocking material is a benzimidazole derivative, wherein the first matrix is represented by Formula 1: Formula 1 wherein R1 and R2 are each independently a naphthyl group or a dibenzofuranyl group, L1 and L2 are each independently a C6-C 30 arylene group, a and b are each an integer of 0 or 1, and at least one of a and b is 0, and wherein the second matrix is represented by Formula 3: Formula 3 wherein the definitions of R1, R2, L1, L2, a, and b are the same as those in Formula 1, and wherein x, y, m, and n are each independently positive integers, and the sum of x, y, m, and n is 15 to 29, wherein the weight percentage of the first matrix to the second matrix is 9:1 to 7:3, wherein the blue dopant is represented by Formula 5-1: Formula 5-1 wherein, in Formula 5-1, c and d are each independently integers from 0 to 4, and e is an integer from 0 to 3, wherein R 11 and R 12 each independently selected from the group consisting of C1-C 20 alkyl, C6-C 30 aryl, and C6-C 30 arylamino wherein R 13 is selected from C1-C 10 alkyl, wherein X1 and X2 are each independently oxygen (O) or NR 14 , and R 14 is C6-C 30 aryl wherein the electron blocking material is wherein the first hole blocking material is represented by Formula 9: Formula 9 wherein Y1 to Y5 are each independently CR1 or N, and one to three of Y1 to Y5 are N, wherein R1 is independently hydrogen or C6-C 30 aryl, Among them, L is a C6-C 30 arylene group, R2 is a carbazolyl group or wherein R3 is hydrogen, and wherein, a is 0 or 1, b is 1 or 2, and c is an integer from 0 to 4, wherein the second hole blocking material is represented by Formula 11: Formula 11 wherein Ar is an anthryl group, R1 is a C6-C 30 aryl group, and wherein R2 is C1-C 10 alkyl group.

10. The organic light-emitting device according to claim 9, wherein the first matrix is one of the following compounds of Formula 2: Formula 2 11. The organic light-emitting device according to claim 9, wherein the weight percentage of the first matrix to the second matrix is 7:

3.

12. The organic light-emitting device according to claim 9, wherein the first hole blocking material is one of the following compounds of Formula 10: Formula 10 13. The organic light-emitting device according to claim 9, wherein the second hole blocking material is one of the following compounds of Formula 12: Formula 12 14. The organic light-emitting device according to claim 9, wherein the organic light-emitting diode further comprises: A second light-emitting material layer located between the first light-emitting material layer and the second electrode, the second light-emitting material layer comprising a third matrix, a fourth matrix, and a second blue dopant; and A first charge generation layer between the first light-emitting material layer and the second light-emitting material layer, wherein the third matrix is an anthracene derivative and the fourth matrix is a deuterated anthracene derivative.

15. The organic light-emitting device according to claim 9 or 14, wherein red pixels, green pixels, and blue pixels are defined on the substrate, the organic light-emitting diode corresponding to each of the red pixels, the green pixels, and the blue pixels, and wherein the organic light-emitting device further comprises: A color conversion layer disposed between the substrate and the organic light-emitting diode or on the organic light-emitting diode and corresponding to the red pixels and the green pixels.

16. The organic light-emitting device according to claim 14, wherein the organic light-emitting diode further comprises: A third light-emitting material layer located between the first charge generation layer and the second light-emitting material layer, the third light-emitting material layer emitting yellow-green light; and A second charge generation layer between the second light-emitting material layer and the third light-emitting material layer.

17. The organic light-emitting device according to claim 14, the organic light-emitting diode further comprising: A third light-emitting material layer located between the first charge generation layer and the second light-emitting material layer, the third light-emitting material layer emitting red light and green light; and A second charge generation layer between the second light-emitting material layer and the third light-emitting material layer.

18. The organic light-emitting device according to claim 16 or 17, wherein red pixels, green pixels, and blue pixels are defined on the substrate, the organic light-emitting diode corresponding to each of the red pixels, the green pixels, and the blue pixels, and wherein the organic light-emitting device further comprises: A color filter layer disposed between the substrate and the organic light-emitting diode or on the organic light-emitting diode and corresponding to the red pixels, the green pixels, and the blue pixels.

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