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 and 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 and including an electron blocking material of a spirofluorene-substituted amine derivative; and a first hole blocking layer located between the second electrode and the first light-emitting material layer and including a hole blocking material of an azine derivative, wherein the first matrix is an anthracene derivative and the second matrix is a deuterated anthracene 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 lifetime 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] OLEDs emit 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 lower voltage (e.g., 10V or lower) than the voltage required to operate other display devices. 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 OLEDs may be formed in each of the red pixel region, the green pixel region, and the blue pixel region.

[0006] However, OLEDs in blue pixels cannot provide sufficient luminous efficiency and lifetime, such that organic light emitting display devices are limited in terms of luminous efficiency and lifetime. 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 eliminate 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 lifetime and an organic light emitting device including the OLED.

[0010] Additional features and advantages of the present disclosure will be set forth in the following description, 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 and 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 and including an electron-blocking material of a spirofluorene-substituted amine derivative; and a first hole-blocking layer located between the second electrode and the first light-emitting material layer and including a hole-blocking material of an azine derivative, wherein the first matrix is an anthracene derivative, and the second matrix is a deuterated anthracene derivative.

[0013] As an example, the first hole-blocking layer further includes a second hole-blocking material of a benzimidazole derivative.

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

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

[0016] The OLED may include a single light-emitting part or a tandem structure of multiple light-emitting parts.

[0017] The tandem-structure OLED may emit blue light or white light.

[0018] According to another aspect, the present disclosure provides an organic light-emitting device including the OLED as described above.

[0019] For example, the organic light-emitting device may be an organic light-emitting display device or a lighting device.

[0020] 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.

[0021] Beneficial effects

[0022] 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.

[0023] In addition, the electron blocking layer of the OLED of the present disclosure includes a spirofluorene-substituted 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

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate implementations of the present disclosure and, together with the description, are used to explain the principles of the embodiments of the present disclosure.

[0025] Figure 1 is a schematic circuit diagram showing the organic light-emitting display device of the present disclosure.

[0026] Figure 2 is a schematic cross-sectional view showing the organic light-emitting display device according to the first embodiment of the present disclosure.

[0027] Figure 3 is a schematic cross-sectional view showing an OLED having a single light-emitting portion for the organic light-emitting display device according to the first embodiment of the present disclosure.

[0028] Figure 4 is a schematic cross-sectional view showing an OLED having a tandem structure with two light-emitting portions according to the first embodiment of the present disclosure.

[0029] Figure 5 is a schematic cross-sectional view showing the organic light-emitting display device according to the second embodiment of the present disclosure.

[0030] Figure 6 is a schematic cross-sectional view showing the OLED for the organic light-emitting display device according to the second embodiment of the present disclosure.

[0031] 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

[0032] Now, various aspects of the present disclosure, whose examples are shown in the accompanying drawings, will be described in detail.

[0033] Figure 1It is a schematic circuit diagram showing the organic light-emitting display device of the present disclosure.

[0034] 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.

[0035] 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, the 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.

[0036] The driving thin film transistor Td is turned on by the data signal applied to the gate, so that a current proportional to the data signal is provided 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 in the driving thin film transistor Td remains constant during one frame. Therefore, the organic light-emitting display device can display a desired image.

[0037] Figure 2 It is a schematic cross-sectional view showing the organic light-emitting display device according to the first embodiment of the present disclosure.

[0038] 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 emitting red light, green light, and blue light may be provided in the red pixels, green pixels, and blue pixels, respectively.

[0039] The substrate 110 may be a glass substrate or a plastic substrate. For example, the substrate 110 may be a polyimide substrate.

[0040] 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.

[0041] The semiconductor layer 122 is formed on the buffer layer 120. The semiconductor layer 122 may include an oxide semiconductor material or polysilicon.

[0042] 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 into both sides of the semiconductor layer 122.

[0043] 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.

[0044] The gate 130 formed of a conductive material such as metal is formed on the gate insulating layer 124 to correspond to the center of the semiconductor layer 122.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The source electrode 140 and the drain electrode 142 are spaced apart from each other with respect to the gate 130 and contact both sides of the semiconductor layer 122 via the first contact hole 134 and the second contact hole 136, respectively.

[0051] 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 ( Figure 1 the) driving TFT Td.

[0052] 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.

[0053] 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.

[0054] 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 that serves as a driving element.

[0055] In addition, a power line and a storage capacitor can be further formed. The power 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.

[0056] 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.

[0057] A first electrode 160 is respectively formed in each pixel. 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).

[0058] 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.

[0059] 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.

[0060] 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 including a light-emitting material layer (EML) containing 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) between the first electrode 160 and the EML, and a hole blocking layer (HBL) between the EML and the second electrode 164.

[0061] 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.

[0062] In addition, the EBL includes a spirofluorene-substituted 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.

[0063] 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 be used as a cathode. For example, the second electrode 164 may be formed of aluminum (Al), magnesium (Mg), or an Al-Mg alloy.

[0064] The first electrode 160, the organic light-emitting layer 162, and the second electrode 164 constitute the OLED D.

[0065] 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.

[0066] A polarizing plate (not shown) for reducing ambient light reflection may be provided above the top-emitting type OLED D. For example, the polarizing plate may be a circular polarizing plate.

[0067] 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, so that a flexible display device can be provided.

[0068] Figure 3 is a schematic cross-sectional view showing an OLED having a single light-emitting unit of an organic light-emitting display device according to a first embodiment of the present disclosure.

[0069] As shown Figure 3 in the figure, the OLED D includes a first electrode 160 and a second electrode 164 facing each other, and an organic light-emitting layer 162 therebetween. The organic light-emitting layer 162 includes an EML 240 between the first electrode 160 and the second electrode 164, an EBL 230 between the first electrode 160 and the EML 240, and an HBL 250 between the EML 240 and the second electrode 164.

[0070] 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.

[0071] The organic light-emitting layer 162 may further include a hole transport layer (HTL) 220 between the first electrode 160 and the EBL 230.

[0072] In addition, the organic light-emitting layer 162 may further include a hole injection layer (HIL) 210 between the first electrode 160 and the HTL 220 and an electron injection layer (EIL) 260 between the second electrode 164 and the HBL 250.

[0073] 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.

[0074] The compound of the first matrix 242 may be represented by Formula 1:

[0075] Formula 1

[0076]

[0077] In Formula 1, R 1 and R 2 are each independently a C 6 ~C 30 aryl or a C 5 ~C 30 heteroaryl, and L 1 and L 2 are each independently a C 6 ~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.

[0078] For example, R 1 may be phenyl or naphthyl, and R 2 may be naphthyl, dibenzofuranyl, or a fused dibenzofuranyl. L 1 and L 2 may each independently be a phenylene group.

[0079] In an exemplary embodiment, the first matrix 242 may be a compound of one of the following of Formula 2:

[0080] Formula 2

[0081]

[0082]

[0083] 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.

[0084] For example, the compound of the second matrix 244 may be represented by Formula 3:

[0085] Formula 3

[0086]

[0087] In Formula 3, R 1 , R 2 , L 1 , L 2 , a and b are defined the same as in Formula 1. In Formula 3, D x , D y , D m and D n 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.

[0088] In an exemplary embodiment, the second matrix 244 of Formula 3 may be a compound of one of the following of Formula 4:

[0089] Formula 4

[0090]

[0091]

[0092]

[0093]

[0094] The compound of the blue dopant may be represented by Formula 5, but is not limited thereto.

[0095] Formula 5

[0096]

[0097] In Formula 5, "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 C 1 to C 20 alkyl, C 6 to C 30 aryl, C 5 to C 30 heteroaryl, and C 6 to C 30 arylamino, or two adjacent ones of R 11 or two adjacent ones of R 12 form a fused aromatic ring or heteroaromatic ring. R 13 is selected from the group consisting of C 1 to C 10 alkyl, C 6 to C 30 aryl, C 5 to C 30 heteroaryl, and C 6 to C 30 arylamino. X 1 and X 2 are each independently oxygen (O) or NR 14 , and R 14 is C 6 to C 30 aryl.

[0098] For example, the blue dopant in Formula 5 can be a compound of one of the following in Formula 6:

[0099] Formula 6

[0100]

[0101]

[0102]

[0103]

[0104]

[0105]

[0106]

[0107]

[0108]

[0109]

[0110]

[0111]

[0112]

[0113]

[0114] The EBL 230 includes a spirofluorene-substituted amine derivative as an electron blocking material. The material of the EBL 230 can be represented by Formula 7:

[0115] Formula 7

[0116]

[0117] In Formula 7, L is an arylene group, and "a" is 0 or 1. R 1 and R 2 are each independently selected from the group consisting of C 6 to C 30 arylene groups and C 5 to C 30 heteroarylene groups.

[0118] For example, L can be a phenylene group, and each of R 1 and R 2 can be selected from the group consisting of biphenyl, fluorene, phenylcarbazole, carbazolylphenyl, dibenzothiophene, and dibenzofuran.

[0119] That is, the electron blocking material can be a spirofluorene-substituted amine derivative.

[0120] The electron blocking material of Formula 7 can be one of the following of Formula 8:

[0121] Formula 8

[0122]

[0123] The HBL 250 can include an azine derivative as a hole blocking material. For example, the material of the HBL 250 can be represented by Formula 9:

[0124] Formula 9

[0125]

[0126] In Formula 9, Y 1 to Y 5 are each independently CR 1 or N, and one to three of Y 1 to Y 5 are N. R 1 is independently hydrogen or C 6 to C 30 aryl. L is C 6 to C 30 arylene, and R 2 is C 6 to C 30 aryl or C 5 to C 30 heteroaryl. R 3 is hydrogen, or two adjacent ones of R 3 form a fused ring. "a" is 0 or 1, "b" is 1 or 2, and "c" is an integer from 0 to 4.

[0127] The hole blocking material of Formula 9 can be one of the following of Formula 10:

[0128] Formula 10

[0129]

[0130]

[0131]

[0132] 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:

[0133] Formula 11

[0134]

[0135] In Formula 11, Ar is C 10 to C 30 arylene, R 1 is C 6 to C 30 aryl or C 5 to C 30 heteroaryl, and R 2 is hydrogen, C 1 to C 10 alkyl, or C 6 to C 30 aryl.

[0136] For example, Ar can be naphthylene or anthrylene, R 1 can be benzimidazole or phenyl, and R2 It may be methyl, ethyl, or phenyl.

[0137] The hole blocking material of Formula 11 may be one of the following of Formula 12:

[0138] Formula 12

[0139]

[0140]

[0141] HBL 250 may include one of the hole blocking material of Formula 9 and the hole blocking material of Formula 11.

[0142] In this case, the thickness of EML 240 may be greater than each of the thicknesses of EBL 230 and HBL 250, and may be less than the thickness of HTL 220. For example, the thickness of the EML may be about to The thickness of each of EBL 230 and HBL 250 may be about to The thickness of HTL 220 may be about to EBL 230 and HBL 250 may have the same thickness.

[0143] HBL 250 may include both the hole blocking material of Formula 9 and the hole blocking material of Formula 11. For example, in HBL 250, the hole blocking material of Formula 9 and the hole blocking material of Formula 11 may have the same weight %.

[0144] In this case, the thickness of EML 240 may be greater than the thickness of EBL 230, and may be less than the thickness of HBL 250. In addition, the thickness of HBL 250 may be less than the thickness of HTL 220. For example, the thickness of the EML may be about to The thickness of EBL 230 may be about to The thickness of HBL 250 may be about to The thickness of HTL 220 may be about to

[0145] The hole blocking material of Formula 9 and / or the hole blocking material of Formula 11 has electron transport properties, such that the electron transport layer can be omitted. As a result, HBL 250 is in direct contact with EIL 260 or directly contacts the second electrode 164 in the absence of EIL 260.

[0146] In the OLED D of the present disclosure, the weight % ratio of the first matrix 242 to the second matrix 244 can be from about 1:9 to about 9:1, preferably from about 3:7 to about 7:3. To provide sufficient luminous efficiency and lifespan for the OLED D and the organic light-emitting display device, the weight % ratio 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 % ratio 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.

[0147] In addition, when the EML 240 includes the blue dopant of Formula 5, images with a narrow full width at half maximum (FWHM) and high color purity are provided.

[0148] In addition, the EBL 230 includes a spirofluorene-substituted 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.

[0149] [Synthesis of the First Matrix]

[0150] 1. Synthesis of Compound Host 1

[0151] [Reaction Scheme 1]

[0152]

[0153] 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) (Pd 2 (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 with alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain the white powder of Compound Host 1 (2.00 g, yield: 89%).

[0154] 2. Synthesis of Compound Host 2

[0155] [Reaction Scheme 2]

[0156]

[0157] In an 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), Pd 2 (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 by alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain the white powder of Compound Host 2 (2.28 g, yield: 86%).

[0158] 3. Synthesis of Compound Host 3

[0159] [Reaction Scheme 3]

[0160]

[0161] In an oven, 10-bromo-9-(naphthalen-3-yl)anthracene (2.00 g, 5.23 mmol), 4,4,5,5-tetramethyl-2-(dibenzo[b,d]furan-1-yl)-1,3,2-dioxaborolane (1.69 g, 5.74 mmol), Pd 2 (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 by alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain the white powder of Compound Host 3 (1.91 g, yield: 78%).

[0162] 4. Synthesis of Compound Host 4

[0163] [Reaction formula 4]

[0164]

[0165] 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), Pd 2 (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 by alumina, precipitated with hexane, and subjected to column chromatography using silica gel to obtain the white powder of compound Host 4 (2.31 g, yield: 82%).

[0166] [Synthesis of the second matrix]

[0167] 1. Synthesis of compound Host 32

[0168] [Reaction formula 5]

[0169]

[0170] Under N 2 conditions, AlCl 3 (0.48 g, 3.6 mmol) was added to a solution of compound Host 2 (5 g, 9.87 mmol) in perdeuterated benzene solution (100 mL). The mixture was stirred at room temperature for 6 hours, and D 2 O (50 mL) was added. After separating the aqueous layer and the organic layer, the aqueous layer was washed with CH 2 Cl 2 (30 mL). The obtained 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 the white powder of compound Host 32 (4.5 g).

[0171] 2. Synthesis of compound Host 34

[0172] [Reaction formula 6]

[0173]

[0174] Under N 2 conditions, AlCl 3 (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 D 2 O (50 mL) was added. After separating the aqueous layer and the organic layer, the aqueous layer was washed with CH 2 Cl 2 (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 Host 34 (4.8 g) as a white powder.

[0175] [Synthesis of Blue Dopant]

[0176] 1. Synthesis of Compound Dopant 56

[0177] (1) 3-Nitro-N,N-diphenylamine

[0178] [Reaction Scheme 7-1]

[0179]

[0180] Under N 2 conditions, a flask containing 3-nitroaniline (25.0 g), iodobenzene (81.0 g), copper(I) 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 resulting product was purified by silica gel column chromatography (eluent: toluene / heptane = 3 / 7 (v / v)) to obtain 3-nitro-N,N-diphenylamine (44.0 g).

[0181] (2) N1,N1-Diphenylbenzene-1,3-diamine

[0182] [Reaction Scheme 7-2]

[0183]

[0184] Under N 2Under the conditions, acetic acid cooled in an ice bath was added and stirred. 3-Nitro-N,N-diphenylamine (44.0 g) was dropped into the 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 reprecipitation was carried out to obtain N1,N1-diphenylbenzene-1,3-diamine (36.0 g).

[0185] (3) N1,N1,N3-Triphenylbenzene-1,3-diamine

[0186] [Reaction formula 7-3]

[0187]

[0188] Under N 2 Under the conditions, 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) dissolved in xylene (50 ml) was slowly dropped into the solution. After the dropping was completed, the mixture was heated and stirred for 1 hour. After the mixture was cooled to room temperature, water and ethyl acetate were added for liquid-liquid separation. The obtained 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).

[0189] (4) N1,N1'-(2-Chloro-1,3-phenylene)bis(N1,N3,N3-triphenylbenzene-1,3-diamine)

[0190] [Reaction formula 7-4]

[0191]

[0192] Under N 2Under the conditions, 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).

[0193] (5) Dopant 56

[0194] [Reaction Scheme 7-5]

[0195]

[0196] Under N 2 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 that of 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 cooled in an ice bath and ethyl acetate 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).

[0197] 2. Synthesis of Compound Dopant 167

[0198] (1) 3,3”-((2-Bromo-1,3-phenylene)bis(oxy))di-1,1'-biphenyl

[0199] [Reaction Scheme 8-1]

[0200]

[0201] Under N 2Under the 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 obtained 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).

[0202] (2) Dopant 167

[0203] [Reaction formula 8-2]

[0204]

[0205] In N 2 Under the 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 the mixture was heated to room temperature, the mixture was cooled to -40 °C again, 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).

[0206] [Synthesis of electron blocking material]

[0207] 1. Synthesis of Compound H4

[0208] (1) Compound A

[0209] [Reaction formula 9-1]

[0210]

[0211] 1,1'-bis(diphenylphosphino)ferrocene (1.5 g, 2.7 mmol), palladium acetate (616 mg, 2.7 mmol) and sodium tert-butoxide (22.9 g, 238 mmol) were added to a toluene solution (500 ml) containing biphenyl-2-ylamine (31.0 g, 183 mmol) and 2-bromo-9,9-dimethyl-9H-fluorene (50.0 g, 183 mmol), and the mixture was refluxed and heated for 20 hours. The reaction mixture was cooled to room temperature and filtered using diatomaceous earth. The mixture was extracted again with toluene, and the organic phase was dried and evaporated under vacuum. The residue was filtered using silica gel and crystallized using isopropanol to obtain compound A. (63.0 g, yield 95%)

[0212] (2) Compound H4

[0213] [Reaction formula 9-2]

[0214]

[0215] A toluene solution (4.4 ml) in which tri-tert-butylphosphine (4.4 mmol) was dissolved, palladium acetate (248 mg, 1.1 mmol) and sodium tert-butoxide (16.0 g, 166 mmol) were added to a toluene solution (500 ml) containing biphenyl-2-yl-(9,9-dimethyl-9H-fluorene-2-yl)amine (40.0 g, 111 mmol) and 4-bromo-9,9'-spirobifluorene (56.9 g, 144 mmol), and the mixture was refluxed and heated for 2 hours. The reaction mixture was cooled to room temperature and filtered using diatomaceous earth.

[0216] The reaction mixture was cooled to room temperature and filtered using diatomaceous earth. The residue was crystallized using ethyl acetate and heptane. The crude product was extracted with toluene in a Soxhlet extractor and purified under reduced pressure to obtain compound H4. (20.4 g, 27% yield)

[0217] [Organic Light Emitting Diode]

[0218] The anode (ITO, ), HIL (Formula 13 (97 wt%) and Formula 14 (3 wt%), ), HTL (Formula 13, )、EBL EML (matrix (98 wt%) and dopant (2 wt%), )、HBL EIL (Formula 17 (98 wt%) and Li (2 wt%), ) and cathode (Al, ) to form an OLED.

[0219] [Formula 13]

[0220]

[0221] [Formula 14]

[0222]

[0223] [Formula 15]

[0224]

[0225] 1. Comparative Example

[0226] (1) Comparative Example 1 (Ref1)

[0227] The compound of Formula 16 was used to form EBL, and the compound of Formula 17 was used to form HBL. The compound "Dopant 56" of Formula 6 was used as a dopant, and the compound "Host 2" of Formula 2 was used as a matrix.

[0228] (2) Comparative Example 2 (Ref2)

[0229] The compound of Formula 15 was used instead of the compound of Formula 17 in Comparative Example 1.

[0230] (3) Comparative Example 3 (Ref3)

[0231] The compound "H4" in Formula 8 was used instead of the compound of Formula 16 in Comparative Example 1.

[0232] (4) Comparative Example 4 (Ref4)

[0233] The compound "H4" in Formula 8 was used instead of the compound of Formula 16 in Comparative Example 2.

[0234] (5) Comparative Example 5 (Ref5)

[0235] The compound "E3" in Formula 10 was used instead of the compound of Formula 17 in Comparative Example 1.

[0236] (6) Comparative Example 6 (Ref6)

[0237] The compound "E15" in Formula 10 was used instead of the compound of Formula 17 in Comparative Example 1.

[0238] (7) Comparative Example 7 (Ref7)

[0239] The compound "Host 4" was used instead of the compound "Host 2" in Comparative Example 1.

[0240] (8) Comparative Example 8 (Ref8)

[0241] Use the compound "Host 4" instead of the compound "Host 2" in Comparative Example 2.

[0242] (9) Comparative Example 9 (Ref9)

[0243] Use the compound "Host 4" instead of the compound "Host 2" in Comparative Example 3.

[0244] (10) Comparative Example 10 (Ref10)

[0245] Use the compound "Host 4" instead of the compound "Host 2" in Comparative Example 4.

[0246] (11) Comparative Example 11 (Ref11)

[0247] Use the compound "Host 4" instead of the compound "Host 2" in Comparative Example 5.

[0248] (12) Comparative Example 12 (Ref12)

[0249] Use the compound "Host 4" instead of the compound "Host 2" in Comparative Example 6.

[0250] (13) Comparative Examples 13 to 24 (Ref13 to Ref24)

[0251] Use the compound "Dopant 167" instead of the compound "Dopant 56" in Comparative Examples 1 to 12.

[0252] 2. Examples

[0253] (1) Example 1 (Ex1)

[0254] The compound "H4" of Formula 8 is used to form the EBL, and the compound "E3" of Formula 10 is used to form the HBL. The compound "Dopant 56" in Formula 6 is used as the dopant, and the compound "Host2" of Formula 2 is used as the matrix.

[0255] (2) Example 2 (Ex2)

[0256] Use the compound "E15" in Formula 10 instead of the compound "E3" in Formula 10 of Example 1.

[0257] (3) Example 3 (Ex3)

[0258] The compound “H4” of formula 8 is used to form EBL, and the compound “E3” of formula 10 is used to form HBL. The compound “Dopant 56” in formula 6 is used as a dopant, and the compounds “Host 2” and “Host 32” are used as hosts. (“Host 2” : “Host 32” = 7 : 3 (weight % ratio))

[0259] (4) Example 4 (Ex4)

[0260] The weight % ratio of “Host 2” to “Host 32” is adjusted from that in Example 3 to 5 : 5. (“Host 2” : “Host 32” = 5 : 5 (weight % ratio))

[0261] (5) Example 5 (Ex5)

[0262] The weight % ratio of “Host 2” to “Host 32” is adjusted from that in Example 3 to 3 : 7. (“Host 2” : “Host 32” = 3 : 7 (weight % ratio))

[0263] (6) Examples 6 to 10 (Ex6 to Ex10)

[0264] The compound “Host 4” in formula 2 is used to replace the compound “Host 2” in Example 1.

[0265] (7) Example 7 (Ex7)

[0266] The compound “E15” in formula 10 is used to replace the compound “E3” of formula 10 in Example 6.

[0267] (8) Example 8 (Ex8)

[0268] The compound “H4” of formula 8 is used to form EBL, and the compound “E3” of formula 10 is used to form HBL. The compound “Dopant 56” in formula 6 is used as a dopant, and the compounds “Host 4” and “Host 34” are used as hosts. (“Host 4” : “Host 34” = 7 : 3 (weight % ratio))

[0269] (9) Example 9 (Ex9)

[0270] The weight % ratio of “Host 4” to “Host 34” is adjusted from that in Example 8 to 5 : 5. (“Host 4” : “Host 34” = 5 : 5 (weight % ratio))

[0271] (10) Example 10 (Ex10)

[0272] Adjust the weight percentage ratio of “Host 4” to “Host 34” from Example 8 to 3:7. (“Host4”:“Host 34” = 3:7 (weight percentage ratio))

[0273] (11) Examples 11 to 20 (Ex11 to Ex20)

[0274] Use the compound “Dopant 167” to replace the compound “Dopant 56” in Examples 1 to 10.

[0275] [Formula 16]

[0276]

[0277] [Formula 17]

[0278]

[0279] Measure the properties of the OLEDs fabricated in Comparative Examples 1 to 24 and Examples 1 to 20, namely voltage (V), external quantum efficiency (EQE, %), color coordinates (CIE), FWHM, and lifetime (T95), and list them in Tables 1 to 4.

[0280] Table 1

[0281]

[0282] Table 2

[0283]

[0284] Table 3

[0285]

[0286] Table 4

[0287]

[0288] As shown in Tables 1 to 4, compared with the OLEDs in Comparative Examples 1 to 24, as Examples 1, 2, 6, 7, 11, 12, 16, and 17, the luminous efficiency and lifetime of the OLEDs using the electron blocking material of Formula 7 and the hole blocking material of Formula 9 are improved.

[0289] In addition, as Examples 3 to 5, 8 to 10, 13 to 15, and 18 to 20, the lifetime of the OLEDs using the first matrix as an anthracene derivative not substituted with deuterium and the second matrix as an anthracene derivative substituted with deuterium is further improved.

[0290] Thus, in the OLED of the present disclosure, the weight % ratio of the first matrix to the second matrix can be about 3:7 to 7:3. In order to increase the lifespan without reducing the luminous efficiency, the weight % ratio of the first matrix to the second matrix can be about 7:3.

[0291] [Organic Light-Emitting Diode]

[0292] Deposit an anode (ITO, ), HIL (Formula 13 (90 wt%) and Formula 14 (10 wt%), ), HTL (Formula 13, ), EBL EML (matrix (98 wt%) and dopant (2 wt%), ), HBL EIL (LiF, ), and cathode (Al, ), in sequence to form an OLED.

[0293] 1. Comparative Example 25 (Ref25)

[0294] The compound of Formula 16 is used to form the EBL, and the compounds of Formula 17 and Formula 15 are used to form the HBL. The compound "Dopant 56" in Formula 6 is used as the dopant, and the compound "Host 2" in Formula 2 is used as the matrix. (The "compound of Formula 17" and the "compound of Formula 15" = 1:1 (weight % ratio))

[0295] (2) Comparative Example 26 (Ref26)

[0296] The compound "H4" of Formula 8 is used instead of the compound of Formula 16 in Comparative Example 25.

[0297] (3) Comparative Example 27 (Ref27)

[0298] The compounds "E3" of Formula 10 and "F1" of Formula 12 are used respectively instead of the compound of Formula 17 and the compound of Formula 15 in Comparative Example 25.

[0299] (4) Comparative Example 28 (Ref28)

[0300] The compound "E15" of Formula 10 is used instead of the compound "E3" in Comparative Example 27.

[0301] (5) Comparative Examples 29 to 32 (Ref29 to Ref32)

[0302] The compound "Host 4" of Formula 2 is used instead of the compound "Host 2" in Comparative Examples 25 to 28.

[0303] (6) Comparative Examples 33 to 36 (Ref33 to Ref36)

[0304] The compound "Dopant 167" of Formula 6 was used instead of the compound "Dopant56" in Comparative Examples 25 to 28.

[0305] (7) Comparative Examples 37 to 40 (Ref37 to Ref40)

[0306] The compound "Dopant 167" of Formula 6 was used instead of the compound "Dopant56" in Comparative Examples 29 to 32.

[0307] 2. Examples

[0308] (1) Example 21 (Ex21)

[0309] The compound "H4" of Formula 8 was used to form the EBL, and the compounds "E3" of Formula 10 and "F1" of Formula 12 were used to form the HBL. The compound "Dopant 56" in Formula 6 was used as the dopant, and the compound "Host 2" of Formula 2 was used as the matrix. ("E3": "F1" = 1:1 (weight % ratio))

[0310] (2) Example 22 (Ex22)

[0311] The compound "E15" of Formula 10 was used instead of the compound "E3" in Example 21.

[0312] (3) Example 23 (Ex23)

[0313] The compound "Host 32" of Formula 4 and the compound "Host 2" in Example 22 were used as the matrix. ("Host 2": "Host 32" = 7:3 (weight % ratio))

[0314] (4) Example 24 (Ex24)

[0315] The compound "Matrix 32" of Formula 4 and the compound "Host 2" in Example 22 were used as the matrix. ("Host 2": "Host 32" = 5:5 (weight % ratio))

[0316] (5) Example 25 (Ex25)

[0317] The compound "Matrix 32" of Formula 4 and the compound "Host 2" in Example 22 were used as the matrix. ("Host 2": "Host 32" = 3:7 (weight % ratio))

[0318] (6) Example 26 (Ex26)

[0319] Replace the compound "Host 2" in Example 21 with the compound "Host 4" of Formula 2.

[0320] (7) Example 27 (Ex27)

[0321] Replace the compound "E3" in Example 26 with the compound "E15" of Formula 10.

[0322] (8) Example 28 (Ex28)

[0323] Use the compound "Host 34" of Formula 4 and the compound "Host 4" in Example 27 as the matrix. ("Host 4": "Host 34" = 7:3 (weight % ratio))

[0324] (9) Example 29 (Ex29)

[0325] Use the compound "Host 34" of Formula 4 and the compound "Host 4" in Example 27 as the matrix. ("Host 4": "Host 34" = 5:5 (weight % ratio))

[0326] (10) Example 30 (30)

[0327] Use the compound "Host 34" of Formula 4 and the compound "Host 4" in Example 27 as the matrix. ("Host 4": "Host 34" = 3:7 (weight % ratio))

[0328] (11) Examples 31 to 35 (Ref31 to Ref35)

[0329] Replace the compound "Dopant56" in Examples 21 to 25 with the compound "Dopant 167" of Formula 6.

[0330] (12) Examples 36 to 40 (Ref36 to Ref40)

[0331] Replace the compound "Dopant56" in Examples 26 to 30 with the compound "Dopant 167" of Formula 6.

[0332] Measure the properties of the OLEDs fabricated in Comparative Examples 25 to 40 and Examples 21 to 40, namely voltage (V), external quantum efficiency (EQE, %), color coordinates (CIE), FWHM, and lifetime (T95), and list them in Tables 5 to 8.

[0333] Table 5

[0334]

[0335] Table 6

[0336]

[0337] Table 7

[0338]

[0339] Table 8

[0340]

[0341] As shown in Tables 5 to 8, compared with the OLEDs in Comparative Examples 25, 26, 29, 30, 33, 34, 37, and 38, the lifetimes of the OLEDs in Comparative Examples 27, 28, 31, 32, 35, 36, 39, and 40 including the hole blocking material of Formula 9 and the hole blocking material of Formula 11 were significantly improved.

[0342] In addition, compared with the OLEDs in Comparative Examples 25 to 40, the luminous efficiency and lifetime of the OLEDs in Examples 21 to 40 including the electron blocking material of Formula 7 in the EBL and the hole blocking materials of Formulas 9 and 11 in the HBL were improved.

[0343] Furthermore, when the EML of the OLED includes the first matrix of Formula 1 as an anthracene derivative and the second matrix of Formula 3 as a deuterium-substituted anthracene derivative, as in Examples 23 to 25, 28 to 30, 33 to 35, and 38 to 40, the luminous efficiency and lifetime were further improved.

[0344] 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.

[0345] 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 between the first electrode 160 and the second electrode 164. The organic light-emitting layer 162 includes a first light-emitting portion 310 containing the first EML 320, a second light-emitting portion 330 containing the second EML 340, and a charge generation layer (CGL) 350 between the first light-emitting portion 310 and the second light-emitting portion 330.

[0346] 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.

[0347] The CGL 350 is located between the first light-emitting part 310 and the second light-emitting part 330, and the first light-emitting part 310, the CGL 350, and the second light-emitting part 330 are sequentially stacked on the first electrode 160. That is, the first light-emitting part 310 is located between the first electrode 160 and the CGL 350, and the second light-emitting part 330 is located between the second electrode 164 and the CGL 350.

[0348] The first light-emitting part 310 includes a first EML 320, a first EBL 316 between the first electrode 160 and the first EML 320, and a first HBL 318 between the first EML 320 and the CGL 350.

[0349] In addition, the first light-emitting part 310 may further include a first HTL 314 between the first electrode 160 and the first EBL 316 and a HIL 312 between the first electrode 160 and the first HTL 314.

[0350] The first EML 320 includes a first matrix 322 as an anthracene derivative, a second matrix 324 as a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the first EML 320.

[0351] 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 as the blue dopant.

[0352] In the first EML 320, the weight percentage ratio of the first matrix 322 to the second matrix 324 may be from about 3:7 to about 7:3. In order to increase the lifespan without reducing the luminous efficiency, the weight percentage ratio of the first matrix 322 to the second matrix 324 may be about 7:3.

[0353] 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. For example, the first HBL 318 may include both a hole blocking material of Formula 9 and a hole blocking material of Formula 11, and the hole blocking material of Formula 9 and the hole blocking material of Formula 11 may have the same weight percentage.

[0354] The second light-emitting part 330 includes a second EML 340, a second EBL 334 between the CGL 350 and the second EML 340, and a second HBL 336 between the second EML 340 and the second electrode 164.

[0355] In addition, the second light-emitting part 330 may further include a second HTL 332 between the CGL 350 and the second EBL 334, and an EIL 338 between the second HBL 336 and the second electrode 164.

[0356] The second EML 340 includes a first matrix 342 that is an anthracene derivative, a second matrix 344 that is a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the second EML 340.

[0357] 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 as the blue dopant.

[0358] In the second EML 340, the weight % ratio of the first matrix 342 to the second matrix 344 may be from about 3:7 to about 7:3. In order to increase the lifespan without reducing the luminous efficiency, the weight % ratio of the first matrix 342 to the second matrix 344 may be about 7:3.

[0359] 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.

[0360] The second EBL 334 may include an electron blocking material of Formula 7. The second HBL 336 may include at least one of a hole blocking material of Formula 9 and a hole blocking material of Formula 11. For example, the second HBL 336 may include both a hole blocking material of Formula 9 and a hole blocking material of Formula 11, and the hole blocking material of Formula 9 and the hole blocking material of Formula 11 may have the same weight %.

[0361] 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.

[0362] 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.

[0363] In OLED D, since the first EML 320 and the second EML 340 each include a first matrix 322 and 342 that are anthracene derivatives and a second matrix 324 and 344 that are deuterated anthracene derivatives, OLED D and the organic light-emitting display device 100 have advantages in terms of luminous efficiency and lifespan.

[0364] In addition, at least one of the first EBL 316 and the second EBL 334 includes a spirofluorene-substituted amine derivative of Formula 7, and at least one of the first HBL 318 and the second HBL 336 includes at least one of a hole-blocking material of Formula 9 and a hole-blocking material of Formula 11. As a result, the lifespan of OLED D and the organic light-emitting display device 100 is further improved.

[0365] In addition, since the first light-emitting unit 310 and the second light-emitting unit 330 for emitting blue light are stacked, the organic light-emitting display device 100 provides an image with a high color temperature.

[0366] 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.

[0367] As shown in Figure 5 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 light emission; and a color filter layer 480 between the OLED D and the second substrate 470.

[0368] 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.

[0369] 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.

[0370] A semiconductor layer 422 is formed on the buffer layer 420. The semiconductor layer 422 may include an oxide semiconductor material or polysilicon.

[0371] 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.

[0372] 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.

[0373] 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.

[0374] 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.

[0375] A source 440 and a drain 442 formed of a conductive material such as metal are formed on the interlayer insulating layer 432.

[0376] The source 440 and the drain 442 are spaced apart from each other with respect to the gate 430 and respectively contact both sides of the semiconductor layer 422 via the first contact hole 434 and the second contact hole 436.

[0377] 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 can correspond to ( Figure 1 the) driving TFT Td.

[0378] Although not shown, the gate line and the data line cross each other to define a pixel, and a switching TFT is formed to be connected to the gate line and the data line. The switching TFT is connected to the TFT Tr that serves as a driving element.

[0379] 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 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.

[0380] A passivation layer 450 is formed to cover the TFT Tr. The passivation layer 450 includes a drain contact hole 452 that exposes the drain 442 of the TFT Tr.

[0381] A first electrode 460 is respectively formed in each pixel. The first electrode 460 is connected to the drain 442 of the 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).

[0382] 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.

[0383] The 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.

[0384] The organic light-emitting layer 462 is formed on the first electrode 460.

[0385] Reference 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 between the first light-emitting part 530 and the second light-emitting part 550; and a second CGL 590 between the second light-emitting part 550 and the third light-emitting part 570.

[0386] 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.

[0387] 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 sequentially stacked on the first electrode 460. 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.

[0388] 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 sequentially stacked on the first electrode 460. 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.

[0389] 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.

[0390] 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 as the blue dopant.

[0391] In the first EML 520, the weight % ratio of the first matrix 522 to the second matrix 524 may be from about 3:7 to about 7:3. To increase the lifetime without reducing the luminescence efficiency, the weight % ratio of the first matrix 522 to the second matrix 524 may be about 7:3.

[0392] 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. For example, the first HBL 538 may include both a hole blocking material of Formula 9 and a hole blocking material of Formula 11, and the hole blocking material of Formula 9 and the hole blocking material of Formula 11 may have the same weight %.

[0393] 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.

[0394] The second EML 540 may be a yellow-green EML. For example, the second EML 540 may include a matrix and a yellow-green dopant. Alternatively, the second EML 540 may include a matrix, a red dopant, and a green dopant. In this case, the second EML 540 may include a lower layer containing the matrix and the red dopant (or green dopant) and an upper layer containing the matrix and the green dopant (or red dopant).

[0395] The third light-emitting part 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 part 570) includes a first matrix 562 that is an anthracene derivative, a second matrix 564 that is a deuterated anthracene derivative, and a blue dopant (not shown), thereby providing blue light from the third EML 560. That is, the third EML 560 may include a compound of Formula 1 as the first matrix 562, a compound of Formula 3 as the second matrix 564, and a compound of Formula 5 as the blue dopant.

[0396] In the third EML 560, the weight % ratio of the first matrix 562 to the second matrix 564 can be from about 3:7 to about 7:3. In order to increase the lifespan without reducing the luminescence efficiency, the weight % ratio of the first matrix 562 to the second matrix 564 can be about 7:3.

[0397] The first matrix 562 of the third EML 560 can be the same as or different from the first matrix 522 of the first EML 520, and the second matrix 564 of the third EML 560 can be the same as or different from the second matrix 524 of the first EML 520. In addition, the blue dopant of the third EML 560 can be the same as or different from the blue dopant of the first EML 520.

[0398] The second EBL 574 can include the electron blocking material of Formula 7. The second HBL 576 can include at least one of the hole blocking material of Formula 9 and the hole blocking material of Formula 11. For example, the second HBL 576 can include both the hole blocking material of Formula 9 and the hole blocking material of Formula 11, and the hole blocking material of Formula 9 and the hole blocking material of Formula 11 can have the same weight %.

[0399] The electron blocking material of the second EBL 574 can 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 can be the same as or different from the hole blocking material of the first HBL 538.

[0400] 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 can 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 can be a PN junction CGL composed of a second N-type CGL 592 and a second P-type CGL 594.

[0401] 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.

[0402] 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.

[0403] In OLED D, since the first EML 520 and the second EML 560 each include a first matrix 522 and 562 which are anthracene derivatives, a second matrix 524 and 564 which are deuterated anthracene derivatives, and a blue dopant.

[0404] Therefore, the 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.

[0405] In Figure 6 OLED D has a triple stacked structure composed of the first light-emitting part 530, the second light-emitting part 550, and the third light-emitting part 570. Alternatively, OLED D can have a double stacked structure without the first light-emitting part 530 or without the third light-emitting part 570.

[0406] Referring again to Figure 5 , a second electrode 464 is formed above the substrate 410 on which the organic light-emitting layer 462 is formed.

[0407] 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.

[0408] The first electrode 460, the organic light-emitting layer 462, and the second electrode 464 constitute OLED D.

[0409] The color filter layer 480 is located above OLED D and includes a red color filter 482, a green color filter 484, and a blue color filter 486 corresponding to red pixels RP, green pixels GP, and blue pixels BP, respectively.

[0410] Although not shown, the color filter layer 480 can be attached to OLED D by using an adhesive layer. Alternatively, the color filter layer 480 can be directly formed on OLED D.

[0411] An encapsulation film (not shown) can be formed to prevent moisture from penetrating into OLED D. For example, the encapsulation film can 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 can be omitted.

[0412] A polarizing plate (not shown) for reducing ambient light reflection can be provided above the top-emitting OLED D. For example, the polarizing plate can be a circular polarizing plate.

[0413] In Figure 5In [description], light from OLED D passes through the second electrode 464, and the color filter layer 480 is disposed above or on top of OLED D. Alternatively, when the light from OLED D passes through the first electrode 460, the color filter layer 480 may be disposed between OLED D and the first substrate 410.

[0414] A color conversion layer (not shown) may be formed between 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 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.

[0415] 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, respectively, such 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.

[0416] In Figure 5 and Figure 6 [description], the OLED D that emits white light is used for a display device. Alternatively, the OLED D may be formed on the entire surface of the substrate without at least one of the driving element and the color filter layer to be used for an illumination device. The display device and the illumination device each including the OLED D of the present disclosure may be referred to as an organic light-emitting device.

[0417] Figure 7 is a schematic cross-sectional view showing an organic light-emitting display device according to a third embodiment of the present disclosure.

[0418] As shown in Figure 7 [description], the 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 light emission; and a color filter layer 680 located between the OLED D and the second substrate 670.

[0419] Although not shown, a color filter may be formed between the second substrate 670 and each color conversion layer 680.

[0420] On a first substrate 610, TFTs Tr corresponding to each of a red pixel RP, a green pixel GP, and a blue pixel BP are formed, and a passivation layer 650 is formed to cover the TFTs Tr. The passivation layer 650 has a drain contact hole 652 that exposes an electrode (e.g., a drain) of the TFTs Tr.

[0421] An 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.

[0422] 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.

[0423] 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.

[0424] The color conversion layer 680 includes a first color conversion layer 682 corresponding to the red pixel RP and a second color conversion layer 684 corresponding to the green pixel GP. For example, the color conversion layer 680 may include an inorganic color conversion material such as a quantum dot.

[0425] The blue light from the OLED D is converted into red light by the first color conversion layer 682 in the red pixel RP, and the blue light from the OLED D is converted into green light by the second color conversion layer 684 in the green pixel GP.

[0426] Accordingly, the organic light-emitting display device 600 can display a full-color image.

[0427] 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.

[0428] 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.

[0429] The various embodiments described above can be combined to provide further 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 needed to provide other embodiments, aspects of the embodiments can be modified.

[0430] These and other changes to the embodiments can be made in light of the above detailed description. Generally, in the following claims, the terms used should not be construed so as to limit 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 which these claims are entitled. Thus, the claims are not limited by the disclosure.

Claims

1. An organic light emitting diode, the organic light emitting diode comprises: 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 and comprising a first matrix, a second matrix and a blue dopant; An electron blocking material located between the first electrode and the first light-emitting material layer and comprising a spirofluorene-substituted amine derivative of the first electron blocking layer; and A first hole blocking material located between the second electrode and the first light-emitting material layer and including an azine derivative of the first hole blocking layer, wherein the first matrix is a non-deuterated anthracene derivative and the second matrix is a deuterated anthracene derivative wherein the blue dopant is 2. The organic light emitting diode according to claim 1, wherein the first hole blocking layer further comprises a second hole blocking material of a benzimidazole derivative.

3. The organic light emitting diode according to claim 2, wherein the first hole blocking material and the second hole blocking material have the same weight %.

4. The organic light-emitting diode according to claim 2 or 3, wherein the second hole blocking material is 5. The organic light emitting diode according to claim 1 or 2, wherein the weight % ratio of the first matrix to the second matrix is 3:7 to 7:

3.

6. The organic light emitting diode according to claim 5, wherein the weight % ratio of the first matrix to the second matrix is 7:

3.

7. The organic light emitting diode according to claim 1 or 2, 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 and 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.

8. The organic light emitting diode according to claim 7, 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 and emitting yellow-green light; and a second charge generation layer between the second light emitting material layer and the third light emitting material layer.

9. The organic light emitting diode according to claim 7, 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 and 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.

10. An organic light emitting device, the organic light emitting device comprises: a substrate; and an organic light emitting diode located on the substrate, wherein the organic light emitting diode is the organic light emitting diode according to any one of claims 1 to 9.

11. The organic light emitting device according to claim 10, wherein red pixels, green pixels and blue pixels are defined on the substrate, and the organic light emitting diode corresponds 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 corresponding to the red pixels and the green pixels and disposed between the substrate and the organic light emitting diode or on the organic light emitting diode.

12. The organic light emitting device according to claim 10, wherein red pixels, green pixels and blue pixels are defined on the substrate, and the organic light emitting diode corresponds 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 corresponding to the red pixel, the green pixel, and the blue pixel and disposed between the substrate and the organic light-emitting diode or on the organic light-emitting diode.

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