Organic light emitting diode display apparatus and manufacturing method thereof

Abstract

An organic light emitting diode display apparatus includes a substrate having a plurality of sub-pixels, and a light emitting material layer in the plurality of sub-pixels on the substrate, wherein the light emitting material layer in at least one of the plurality of sub-pixels includes a first light emitting material layer including a first host and a dopant, a second light emitting material layer on the first light emitting material layer and including a second host and a dopant, and a third light emitting material layer on the second light emitting material layer and including one of a dopant and the second host.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0189866, filed in Korea on December 28, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to organic light-emitting diode (OLED) display devices, and more specifically, to an OLED display device and a method thereof for manufacturing the same, which improves efficiency by utilizing a single chamber to sequentially form first to third light-emitting material layers of a host and a dopant. Background Technology

[0004] Recently, with the advent of the information society and the increasing interest in information displays for processing and displaying large amounts of information, as well as the growing demand for portable information media, the display field has made rapid progress. Therefore, the development of various lightweight and thin flat panel display devices has become a focus.

[0005] Among various flat panel display devices, Organic Light Emitting Diode (OLED) displays are self-emissive devices and do not include the backlight units used in non-self-emissive devices (such as Liquid Crystal Displays (LCDs)). Therefore, OLED displays offer advantages in viewing angle, contrast ratio, and power consumption, making them suitable for a wide range of applications.

[0006] In OLED displays, multiple layers of luminescent material are formed using two substrates to improve efficiency. However, this process complicates manufacturing because the two substrates use two separate chambers. Furthermore, degradation can occur due to contamination during transfer or misalignment of the fine metal mask. Summary of the Invention

[0007] Therefore, this disclosure aims to provide an organic light-emitting diode display device and a method for manufacturing the same, which substantially eliminates one or more problems caused by the limitations and disadvantages of related technologies.

[0008] One object of this disclosure is to provide an organic light-emitting diode (OLED) display device and a method for manufacturing the OLED display device, wherein efficiency and productivity are improved by forming three light-emitting material layers in a single chamber: a first light-emitting material layer of a first matrix and a dopant, a second light-emitting material layer of a second matrix and a dopant, and a third light-emitting material layer of a dopant.

[0009] Another object of this disclosure is to provide an organic light-emitting diode display device and a method for manufacturing the organic light-emitting diode display device, wherein efficiency and productivity are improved by forming three light-emitting material layers in a single chamber: a first light-emitting material layer of a first matrix and a dopant, a second light-emitting material layer of a second matrix and a dopant, and a third light-emitting material layer of the second matrix.

[0010] Other features and advantages of this disclosure will be set forth in the following description, and will be apparent in part from the following description or may be learned by practice of this disclosure. These and other advantages of this disclosure will be realized and obtained through the structures set forth in the description, the claims herein, and the accompanying drawings.

[0011] To achieve these and other advantages of this disclosure, and in accordance with the purposes of this disclosure, as specifically implemented and broadly described herein, an organic light-emitting diode (OLED) display device includes: a substrate having a plurality of sub-pixels; and a light-emitting material layer located on the substrate among the plurality of sub-pixels, wherein the light-emitting material layer in at least one of the plurality of sub-pixels includes: a first light-emitting material layer including a first matrix and a dopant; a second light-emitting material layer located on the first light-emitting material layer and including a second matrix and a dopant; and a third light-emitting material layer located on the second light-emitting material layer and including one of the dopant and the second matrix.

[0012] On the other hand, a method for manufacturing an organic light-emitting diode (OLED) display device includes: placing a substrate in a chamber, the chamber including a first evaporation source for delivering a first substrate to a first region, a second evaporation source for delivering a second substrate to a second region separated from the first region, a third evaporation source for delivering a dopant to a third region corresponding to the sum of the first and second regions, and a first baffle to a third baffle corresponding to the first to the third evaporation sources respectively, the substrate being placed in the first region; forming a first light-emitting material layer by depositing the first substrate and the first substrate and the dopant of the first and third evaporation sources on the substrate when the first and third baffles are in an open state; transferring the substrate to the second region, and forming a second light-emitting material layer by depositing the second substrate and the second substrate and the second substrate and the dopant of the second and third evaporation sources on the substrate when the second and third baffles are in an open state; and forming a third light-emitting material layer by depositing the dopant of the third evaporation source on the substrate when the second baffle is in a closed state and the third baffle is in an open state.

[0013] On the other hand, a method for manufacturing an organic light-emitting diode (OLED) display device includes: placing a substrate in a chamber, the chamber including a first evaporation source for delivering a first substrate to a first region, a second evaporation source for delivering a second substrate to a second region separated from the first region, a third evaporation source for delivering a dopant to a third region corresponding to the sum of the first and second regions, and a first baffle to a third baffle corresponding to the first to the third evaporation sources respectively, the substrate being placed in the first region; forming a first light-emitting material layer by depositing the first substrate and the first substrate and the dopant of the first and third evaporation sources on the substrate when the first and third baffles are in an open state; transferring the substrate to the second region, and forming a second light-emitting material layer by depositing the second substrate and the second substrate and the second substrate and the dopant of the second and third evaporation sources on the substrate when the second and third baffles are in an open state; and forming a third light-emitting material layer by depositing the second substrate of the second evaporation source on the substrate when the second baffle is in an open state and the third baffle is in a closed state.

[0014] It should be understood that both the foregoing general description and the following detailed description are interpretive and intended to provide further interpretation of the claimed disclosure. Attached Figure Description

[0015] The accompanying drawings, included to provide a further understanding of the present disclosure and incorporated in and forming part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the drawings:

[0016] Figure 1 This is a cross-sectional view showing the multilayer light-emitting material layer of an organic light-emitting diode display device according to a first embodiment of the present disclosure;

[0017] Figure 2 This is a view illustrating a method for manufacturing a multilayer light-emitting material layer of an organic light-emitting diode display device according to a first embodiment of the present disclosure;

[0018] Figure 3 This is an energy band diagram illustrating the multilayer light-emitting material layers of an organic light-emitting diode display device according to a first embodiment of the present disclosure;

[0019] Figure 4 This is a cross-sectional view showing the multilayer light-emitting material layer of an organic light-emitting diode display device according to a second embodiment of the present disclosure;

[0020] Figure 5 This is a view illustrating a method for manufacturing a multilayer light-emitting material layer of an organic light-emitting diode display device according to a second embodiment of the present disclosure;

[0021] Figure 6 This is an energy band diagram illustrating the multilayer light-emitting material layers of an organic light-emitting diode display device according to a second embodiment of the present disclosure;

[0022] Figure 7 This is a view illustrating an organic light-emitting diode display device according to a third embodiment of the present disclosure;

[0023] Figure 8 This is a view illustrating an organic light-emitting diode display device according to a fourth embodiment of the present disclosure;

[0024] Figure 9 This is a view illustrating an organic light-emitting diode display device according to a fifth embodiment of the present disclosure;

[0025] Figure 10 This is a view illustrating an organic light-emitting diode display device according to a sixth embodiment of the present disclosure;

[0026] Figure 11 This is a view showing an organic light-emitting diode display device according to a seventh embodiment of the present disclosure;

[0027] Figure 12 This is a view showing an organic light-emitting diode display device according to an eighth embodiment of the present disclosure;

[0028] Figure 13 This is a view showing an organic light-emitting diode display device according to a ninth embodiment of the present disclosure. Specific Implementation

[0029] The advantages and features of this disclosure, and their implementation, will be clarified by the following exemplary embodiments illustrated with reference to the accompanying drawings. However, this disclosure may be embodied in various forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided to make this disclosure sufficiently detailed and complete to assist those skilled in the art in fully understanding its scope. Furthermore, this disclosure is defined only by the claims.

[0030] The shapes, dimensions, ratios, and figures disclosed in the accompanying drawings, which illustrate embodiments of this disclosure, are merely examples. Therefore, this disclosure is not limited to the details shown. The same reference numerals refer to the same elements throughout the text. In the following description, detailed descriptions of relevant known functions and structures may be omitted when it is determined that such detailed description would unnecessarily obscure the focus of this disclosure. When the terms "comprising," "having," and "including" are used in the description of this specification, another component may be added unless a more restrictive term, such as "only," is used. Singular terms may include plural forms unless otherwise stated.

[0031] When interpreting an element, it should be understood to include a range of errors or tolerances, even if such a range of errors or tolerances is not explicitly stated.

[0032] When describing positional relationships, if the positional relationship between two components is described as, for example, "on top of", "above", "below", or "adjacent to", then one or more other components may be placed between the two components, unless more restrictive terms such as "exactly" or "directly" are used.

[0033] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used merely to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0034] As will be fully understood by those skilled in the art, the features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may interact with each other in a variety of ways and be technically driven. Embodiments of this disclosure may be implemented independently of each other or may be implemented together in an interdependent manner.

[0035] In the following description, an organic light-emitting diode display device and a method for manufacturing the same according to embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals refer to the same elements throughout the text. When a detailed description of well-known functions and structures related to this document is determined to unnecessarily obscure the gist of the inventive concept, such detailed description will be omitted or will be simplified.

[0036] Figure 1 This is a cross-sectional view showing the multilayer light-emitting material layer of an organic light-emitting diode display device according to a first embodiment of the present disclosure. Figure 2 This is a view illustrating a method for manufacturing a multilayer light-emitting material layer of an organic light-emitting diode display device according to a first embodiment of the present disclosure. Figure 3 This is an energy band diagram illustrating the multilayer light-emitting material layers of an organic light-emitting diode display device according to a first embodiment of the present disclosure.

[0037] exist Figure 1 In the first embodiment of the organic light-emitting diode (OLED) display device of this disclosure, the multilayer emitting material layer (EML) includes a first emitting material layer (EML) 130, a second emitting material layer (EML) 132, and a third emitting material layer (EML) 134. The first EML 130 includes a first substrate H1 and a dopant D, the second EML 132 includes a second substrate H2 and a dopant D, and the third EML 134 includes a dopant D.

[0038] The thickness of the first EML 130 is greater than or equal to the thickness of the second EML 132, and the thickness of the third EML 134 is less than the thickness of the second EML 132.

[0039] For example, the multilayer EML of the first EML 130, the second EML 132 and the third EML 134 can be set in one of the red sub-pixels, the green sub-pixels and the blue sub-pixels, and the first EML 130, the second EML 132 and the third EML 134 can be formed using a single chamber of the vapor deposition apparatus.

[0040] exist Figure 2 In the vapor deposition apparatus, a single chamber CH includes a first vapor deposition source SS1, a second vapor deposition source SS2, and a third vapor deposition source SS3, as well as a first baffle ST1, a second baffle ST2, and a third baffle ST3 corresponding to the first vapor deposition source SS1, the second vapor deposition source SS2, and the third vapor deposition source SS3, respectively.

[0041] The first vapor deposition source SS1 delivers the first substrate H1 to the first region A1, the second vapor deposition source SS2 delivers the second substrate H2 to the second region A2, and the third vapor deposition source SS3 delivers the dopant D to the third region A3.

[0042] The first region A1 and the second region A2 do not overlap with each other, and the third region A3 corresponds to the sum of the first region A1 and the second region A2.

[0043] In a single chamber CH of the vapor deposition apparatus, a substrate is disposed in a first region A1, and when the first baffle ST1 and the third baffle ST3 are in an open state, the first matrix H1 and the dopant D of the first vapor deposition source SS1 and the third vapor deposition source SS3 are deposited on the substrate. Therefore, a first EML 130 of the first matrix H1 and the dopant D is formed in the corresponding sub-pixel on the substrate.

[0044] Next, the substrate is transferred to the second region A2, and with the second baffle ST2 and the third baffle ST3 in an open state, the second matrix H2 and the dopant D of the second evaporation source SS2 and the third evaporation source SS3 are deposited on the substrate. Therefore, a second EML 132 of the second matrix H2 and the dopant D is formed on the first EML 130.

[0045] Next, a substrate is disposed in the second region A2, and when the second baffle ST2 is in the closed state and the third baffle ST3 is in the open state, the dopant D of the third evaporation source SS3 is deposited on the substrate. Therefore, a third EML 134 of dopant D is formed on the second EML 132.

[0046] In another embodiment, the substrate can be transferred to the first region A1, and the dopant D of the third vapor deposition source SS3 can be deposited on the substrate when the first baffle ST1 is in a closed state and the third baffle ST3 is in an open state. Therefore, the third EML 134 of the dopant D can be formed on the second EML 132.

[0047] exist Figure 3 In this configuration, the first EML 130, the second EML 132, and the third EML 134 are disposed between the electron blocking layer 126 and the hole blocking layer 140.

[0048] The energy level of the lowest unoccupied molecular orbital (LUMO) of the electron blocking layer 126 is higher than that of the LUMO of the first EML 130, and the energy level of the highest occupied molecular orbital (HOMO) of the electron blocking layer 126 is lower than that of the HOMO of the first EML 130.

[0049] The energy levels of the LUMO of the first EML 130 and the second EML 132 are equal to each other, and the energy levels of the HOMO of the first EML 130 and the second EML 132 are equal to each other.

[0050] The energy level of the triplet excited state T1 of the first matrix H1 in the first EML 130 is lower than the energy level of the triplet excited state T1 of the second matrix H2 in the second EML 132.

[0051] The triplet excited state T1 of the dopants in the first EML 130 and the second EML 132 has the same energy level as each other, and the singlet ground state S0 of the dopants in the first EML 130 and the second EML 132 has the same energy level as each other.

[0052] The first matrix H1 and the second matrix H2 of the first EML 130 and the second EML 132 are bipolar matrices with relatively high electron mobility.

[0053] The energy level of the LUMO in the third EML 134 is lower than that of the LUMO in the second EML 132 but higher than that of the LUMO in the hole blocking layer 140. The energy level of the HOMO in the third EML 134 is lower than that of the HOMO in the second EML 132 but higher than that of the HOMO in the hole blocking layer 140.

[0054] The LUMO level of the third EML 134 has a value between the LUMO level of the second EML 132 and the LUMO level of the hole blocking layer 140. The HOMO level of the third EML 134 has a value between the HOMO level of the second EML 132 and the HOMO level of the hole blocking layer 140.

[0055] In a multilayer EML, holes h from the hole blocking layer 140 are transported to the first EML 130 through the third EML 134 and the second EML 132, and electrons e from the electron blocking layer 126 are transported to the first EML 130. Therefore, a composite region of holes h and electrons e is formed in the first EML 130, thereby emitting light.

[0056] Since the energy level of the LUMO of dopant D in the third EML 134 has a value between the energy level of the second matrix H2 of the second EML 132 and the energy level of the LUMO of dopant D and the energy level of the LUMO of the hole blocking layer 140, the electron mobility increases and electrons are rapidly transported to the first EML 130, thereby improving the luminous efficiency.

[0057] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents degradation caused by contamination during transfer or misalignment of the fine metal mask.

[0058] While in the first embodiment the first EML 130, the second EML 132 and the third EML 134 exemplary include the same kind of dopant D, in another embodiment the first EML 130, the second EML 132 and the third EML 134 may include dopants different from each other.

[0059] In another embodiment, the third EML may include a second matrix, which will be described with reference to the accompanying drawings.

[0060] Figure 4 This is a cross-sectional view showing the multilayer light-emitting material layer of an organic light-emitting diode display device according to a second embodiment of the present disclosure. Figure 5 This is a view illustrating a method for manufacturing a multilayer light-emitting material layer of an organic light-emitting diode display device according to a second embodiment of the present disclosure. Figure 6 This is an energy band diagram illustrating the multilayer light-emitting material layers of an organic light-emitting diode display device according to a second embodiment of the present disclosure.

[0061] exist Figure 4 In the second embodiment of the organic light-emitting diode (OLED) display device of the present disclosure, the multilayer light-emitting material layer (EML) includes a first light-emitting material layer (EML) 230, a second light-emitting material layer (EML) 232 and a third light-emitting material layer (EML) 236.

[0062] The thickness of the first EML 230 is greater than or equal to the thickness of the second EML 232, and the thickness of the third EML 236 is less than the thickness of the second EML 232.

[0063] For example, the multilayer EML of the first EML 230, the second EML 232 and the third EML 236 can be set in one of the red sub-pixels, the green sub-pixels and the blue sub-pixels, and the first EML 230, the second EML 232 and the third EML 236 can be formed using a single chamber of the vapor deposition apparatus.

[0064] exist Figure 5 In the vapor deposition apparatus, a single chamber CH includes a first vapor deposition source SS1, a second vapor deposition source SS2, and a third vapor deposition source SS3, as well as a first baffle ST1, a second baffle ST2, and a third baffle ST3 corresponding to the first vapor deposition source SS1, the second vapor deposition source SS2, and the third vapor deposition source SS3, respectively.

[0065] The first vapor deposition source SS1 delivers the first substrate H1 to the first region A1, the second vapor deposition source SS2 delivers the second substrate H2 to the second region A2, and the third vapor deposition source SS3 delivers the dopant D to the third region A3.

[0066] The first region A1 and the second region A2 do not overlap with each other, and the third region A3 corresponds to the sum of the first region A1 and the second region A2.

[0067] In a single chamber CH of the vapor deposition apparatus, a substrate is disposed in a first region A1, and when the first baffle ST1 and the third baffle ST3 are in an open state, the first matrix H1 and the dopant D of the first vapor deposition source SS1 and the third vapor deposition source SS3 are deposited on the substrate. Therefore, a first EML 230 of the first matrix H1 and the dopant D is formed in the corresponding sub-pixel on the substrate.

[0068] Next, the substrate is transferred to the second region A2, and with the second baffle ST2 and the third baffle ST3 in an open state, the second matrix H2 and the dopant D of the second evaporation source SS2 and the third evaporation source SS3 are deposited on the substrate. Therefore, a second EML 232 of the second matrix H2 and the dopant D is formed on the first EML 230.

[0069] Next, a substrate is disposed in the second region A2, and when the third baffle ST3 is in the closed state and the second baffle ST2 is in the open state, the second matrix H2 of the second vapor deposition source SS2 is deposited on the substrate. Therefore, a third EML 236 of the second matrix H2 is formed on the second EML 232.

[0070] exist Figure 6In this configuration, the first EML 230, the second EML 232, and the third EML 236 are disposed between the electron blocking layer 226 and the hole blocking layer 240.

[0071] The energy level of the lowest unoccupied molecular orbital (LUMO) of the electron blocking layer 226 is higher than the energy level of the LUMO of the first EML 230, and the energy level of the highest occupied molecular orbital (HOMO) of the electron blocking layer 226 is lower than the energy level of the HOMO of the first EML 230.

[0072] The LUMO energy levels of the first EML 230, the second EML 232, and the third EML 236 are equal to each other, and the HOMO energy levels of the first EML 230, the second EML 232, and the third EML 236 are equal to each other.

[0073] The energy level of the triplet excited state T1 of the first matrix H1 in the first EML 230 is lower than the energy level of the triplet excited state T1 of the second matrix H2 in the second EML 232.

[0074] The triplet excited state T1 of the dopants in the first EML 230 and the second EML 232 has the same energy level as each other, and the singlet ground state S0 of the dopants in the first EML 230 and the second EML 232 has the same energy level as each other.

[0075] The energy level of the LUMO in the third EML 236 is higher than that of the LUMO in the hole blocking layer 240. The energy level of the HOMO in the third EML 236 is higher than that of the HOMO in the hole blocking layer 240.

[0076] The second matrix H2 of the second EML 232 and the third EML 236 is a bipolar matrix with relatively high electron mobility.

[0077] In the multilayer EML, holes h from the hole blocking layer 240 are transported to the first EML 230 through the third EML 236 and the second EML 232, and electrons e from the electron blocking layer 226 are transported to the first EML 230. Therefore, a composite region of holes h and electrons e is formed in the first EML 230, thereby emitting light.

[0078] Because the second matrix H2 of the third EML 236 is formed of a bipolar material capable of transporting excitons with relatively high electron mobility, the electron mobility is improved, and electrons e are rapidly transported to the first EML 230. Therefore, the luminous efficiency is improved.

[0079] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents degradation caused by contamination during transfer or misalignment of the fine metal mask.

[0080] Although in the second embodiment the first EML 230 and the second EML 232 exemplary include the same kind of dopant D, in another embodiment the first EML 230 and the second EML 232 may include dopants different from each other.

[0081] In another embodiment, the multilayer EML may be set in at least one of the red sub-pixels, green sub-pixels, and blue sub-pixels, as will be described with reference to the accompanying drawings.

[0082] Figure 7 This is a view illustrating an organic light-emitting diode display device according to a third embodiment of the present disclosure. Parts identical to those in the first and second embodiments in the third embodiment will be omitted.

[0083] exist Figure 7 In this disclosure, the organic light-emitting diode (OLED) display device 310 of the third embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0084] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 320 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 322 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 320.

[0085] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 322 to replace HIL 320.

[0086] A red hole transport layer (HTL) 324r is selectively provided in the red sub-pixel SPr on HTL 322, and a green hole transport layer (HTL) 324g is selectively provided in the green sub-pixel SPg on HTL 322.

[0087] The red HTL 324r and green HTL 324g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0088] An electron blocking layer (EBL) 326 is provided on the entire red HTL 324r of the red sub-pixel SPr, the entire green HTL 324g of the green sub-pixel SPg, and the entire HTL 322 of the blue sub-pixel SPb.

[0089] A red emitting material layer (EML) 330r is selectively provided on the EBL 326 of the red sub-pixel SPr, and a green emitting material layer (EML) 330g is provided on the EBL 326 of the green sub-pixel SPg.

[0090] A first blue luminescent material layer (EML) 330b, a second blue luminescent material layer (EML) 332b, and a third blue luminescent material layer (EML) 334b ​​may be sequentially provided on the EBL 326 of the blue sub-pixel SPb, or a first blue luminescent material layer (EML) 330b, a second blue luminescent material layer (EML) 332b, and a third blue luminescent material layer (EML) 336b may be sequentially provided on the EBL 326 of the blue sub-pixel SPb.

[0091] The thickness of the first blue EML 330b is greater than or equal to the thickness of the second blue EML 332b, and the thickness of the third blue EMLs 334b ​​and 336b is less than the thickness of the second blue EML 332b.

[0092] The thickness of green EML 330g is greater than the total thickness of the first blue EML 330b, the second blue EML 332b and the third blue EML 334b ​​or the total thickness of the first blue EML 330b, the second blue EML 332b and the third blue EML 336b, and less than the thickness of red EML 330r.

[0093] The first blue EML 330b includes a first blue matrix and a blue dopant, and the second blue EML 332b includes a second blue matrix and a blue dopant. The third blue EML 334b ​​includes a blue dopant, and the third blue EML 336b includes a second blue matrix.

[0094] The first blue EML 330b, the second blue EML 332b, and the third blue EML 334b ​​can have the same characteristics as... Figures 1 to 3 The first blue EML 330b, the second blue EML 332b, and the third blue EML 336b have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0095] The energy level of the triplet excited state T1 of the first blue matrix of the first blue EML 330b is lower than the energy level of the triplet excited state T1 of the second blue matrix of the second blue EML 332b.

[0096] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third blue EML 334b ​​has a value between the energy level of the LUMO of the second blue EML 332b and the energy level of the LUMO of HBL 340, and the energy level of the highest occupied molecular orbital (HOMO) of the third blue EML 334b ​​has a value between the energy level of the HOMO of the second blue EML 332b and the energy level of the HOMO of HBL 340.

[0097] Therefore, electrons are rapidly transferred to the first blue EML 330b, thereby improving luminous efficiency.

[0098] The second blue matrix of the third blue EML 336b may include bipolar materials.

[0099] Therefore, electrons are rapidly transferred to the first blue EML 330b, thereby improving luminous efficiency.

[0100] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0101] Hole blocking layers (HBL) 340 are provided on the entire red EML 330r of the red sub-pixel SPr, the entire green EML 330g of the green sub-pixel SPg, and the entire third blue EML 334b ​​and 336b of the blue sub-pixel SPb. An electron transporting layer (ETL) 342 is provided on the HBL 340 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0102] A first cathode 344 and a second cathode 346 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 342, and a first cover layer 350 and a second cover layer 352 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 346.

[0103] Figure 8 This is a view illustrating an organic light-emitting diode display device according to a fourth embodiment of the present disclosure. Parts identical to those in the first and second embodiments in the fourth embodiment will be omitted.

[0104] exist Figure 8In this disclosure, the organic light-emitting diode (OLED) display device 410 of the fourth embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0105] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 420 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 422 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 420.

[0106] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 422 to replace HIL 420.

[0107] A red hole transport layer (HTL) 424r is selectively provided in the red sub-pixel SPr on HTL 422, and a green hole transport layer (HTL) 424g is selectively provided in the green sub-pixel SPg on HTL 422.

[0108] The red HTL 424r and green HTL 424g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0109] An electron blocking layer (EBL) 426 is provided on the entire red HTL 424r of the red sub-pixel SPr, the entire green HTL 424g of the green sub-pixel SPg, and the entire HTL 422 of the blue sub-pixel SPb.

[0110] A red emitting material layer (EML) 430r is selectively provided on the EBL 426 of the red sub-pixel SPr, and a blue emitting material layer (EML) 430b is provided on the EBL 426 of the blue sub-pixel SPb.

[0111] A first green luminescent material layer (EML) 430g, a second green luminescent material layer (EML) 432g, and a third green luminescent material layer (EML) 434g may be sequentially disposed on the EBL 426 of the green sub-pixel SPg, or a first green luminescent material layer (EML) 430g, a second green luminescent material layer (EML) 432g, and a third green luminescent material layer (EML) 436g may be sequentially disposed on the EBL 426 of the green sub-pixel SPg.

[0112] The thickness of the first green EML 430g is greater than or equal to the thickness of the second green EML 432g, and the thickness of the third green EMLs 434g and 436g is less than the thickness of the second green EML 432g.

[0113] The total thickness of the first green EML 430g, the second green EML 432g, and the third green EML 434g, or the total thickness of the first green EML 430g, the second green EML 432g, and the third green EML 436g, is greater than the thickness of the blue EML 430b and less than the thickness of the red EML 430r.

[0114] The first green EML 430g includes a first green matrix and a green dopant, and the second green EML 432g includes a second green matrix and a green dopant. The third green EML 434g includes a green dopant, and the third green EML 436g includes a second green matrix.

[0115] The first green EML 430g, the second green EML 432g, and the third green EML 434g can have the same properties as... Figures 1 to 3 The first green EML 430g, the second green EML 432g, and the third green EML 436g have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0116] The energy level of the triplet excited state T1 of the first green matrix (430g) is lower than that of the triplet excited state T1 of the second green matrix (432g).

[0117] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third green EML 434g has a value between the energy level of the LUMO of the second green EML 432g and the energy level of the LUMO of HBL 440, and the energy level of the highest occupied molecular orbital (HOMO) of the third green EML 434g has a value between the energy level of the HOMO of the second green EML 432g and the energy level of the HOMO of HBL 440.

[0118] Therefore, electrons are rapidly transferred to the first green EML 430g, thereby improving luminous efficiency.

[0119] The second green matrix of the third green EML 436g may include bipolar materials.

[0120] Therefore, electrons are rapidly transferred to the first green EML 430g, thereby improving luminous efficiency.

[0121] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0122] Hole blocking layers (HBL) 440 are provided on the entire red EML 430r of the red sub-pixel SPr, the entire third green EML 434g and 436g of the green sub-pixel SPg, and the entire blue EML 430b of the blue sub-pixel SPb. An electron transporting layer (ETL) 442 is provided on the HBL 440 in the red sub-pixel SPr, the green sub-pixel SPg, and the blue sub-pixel SPb.

[0123] A first cathode 444 and a second cathode 446 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 442, and a first cover layer 450 and a second cover layer 452 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 446.

[0124] Figure 9 This is a view illustrating an organic light-emitting diode display device according to a fifth embodiment of the present disclosure. Parts identical to those in the first and second embodiments in the fifth embodiment will be omitted.

[0125] exist Figure 9 In this disclosure, the organic light-emitting diode (OLED) display device 510 of the fifth embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0126] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 520 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 522 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 520.

[0127] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 522 to replace HIL 520.

[0128] A red hole transport layer (HTL) 524r is selectively provided in the red sub-pixel SPr on HTL 522, and a green hole transport layer (HTL) 524g is selectively provided in the green sub-pixel SPg on HTL 522.

[0129] The red HTL 524r and green HTL 524g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0130] An electron blocking layer (EBL) 526 is provided on the entire red HTL 524r of the red sub-pixel SPr, the entire green HTL 524g of the green sub-pixel SPg, and the entire HTL 522 of the blue sub-pixel SPb.

[0131] A first red luminescent material layer (EML) 530r, a second red luminescent material layer (EML) 532r, and a third red luminescent material layer (EML) 534r may be sequentially provided on the EBL 526 of the red sub-pixel SPr, or a first red luminescent material layer (EML) 530r, a second red luminescent material layer (EML) 532r, and a third red luminescent material layer (EML) 536r may be sequentially provided on the EBL 526 of the red sub-pixel SPr.

[0132] The thickness of the first red EML 530r is greater than or equal to the thickness of the second red EML 532r, and the thickness of the third red EMLs 534r and 536r is less than the thickness of the second red EML 532r.

[0133] A green EML 530g is selectively provided on the EBL 526 of the green sub-pixel SPg, and a blue EML 530b is selectively provided on the EBL 526 of the blue sub-pixel SPb.

[0134] The thickness of the green EML 530 is greater than the thickness of the blue EML 530b, and less than the total thickness of the first red EML 530r, the second red EML 532r, and the third red EML 534r, or the total thickness of the first red EML 530r, the second red EML 532r, and the third red EML 536r.

[0135] The first red EML 530r includes a first red matrix and a red dopant, and the second red EML 532r includes a second red matrix and a red dopant. The third red EML 534r includes a red dopant, and the third red EML 536r includes a second red matrix.

[0136] The first red EML 530r, the second red EML 532r, and the third red EML 534r can have the same characteristics as... Figures 1 to 3 The first red EML 530r, the second red EML 532r, and the third red EML 536r have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0137] The energy level of the triplet excited state T1 of the first red matrix, EML 530r, is lower than that of the triplet excited state T1 of the second red matrix, EML 532r.

[0138] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third red EML 534r has a value between the energy level of the LUMO of the second red EML 532r and the energy level of the LUMO of HBL 540, and the energy level of the highest occupied molecular orbital (HOMO) of the third red EML 534r has a value between the energy level of the HOMO of the second red EML 532r and the energy level of the HOMO of HBL 540.

[0139] Therefore, electrons are rapidly transferred to the first red EML 530r, thereby improving luminous efficiency.

[0140] The second red matrix of the third red EML 536r may include bipolar materials.

[0141] Therefore, electrons are rapidly transferred to the first red EML 530r, thereby improving luminous efficiency.

[0142] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0143] Hole blocking layers (HBL) 540 are provided on the entire third red EML 534r or 536r of the red sub-pixel SPr, the entire green EML 530g of the green sub-pixel SPg, and the entire blue EML 530b of the blue sub-pixel SPb. An electron transporting layer (ETL) 542 is provided on the HBL 540 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0144] A first cathode 544 and a second cathode 546 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 542, and a first cover layer 550 and a second cover layer 552 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 546.

[0145] Figure 10 This is a view illustrating an organic light-emitting diode display device according to a sixth embodiment of the present disclosure. Parts identical to those in the first and second embodiments in the sixth embodiment will be omitted.

[0146] exist Figure 10 In this sixth embodiment of the present disclosure, the organic light-emitting diode (OLED) display device 610 includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0147] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 620 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 622 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 620.

[0148] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 622 to replace HIL 620.

[0149] A red hole transport layer (HTL) 624r is selectively provided in the red sub-pixel SPr on HTL 622, and a green hole transport layer (HTL) 624g is selectively provided in the green sub-pixel SPg on HTL 622.

[0150] The red HTL 624r and green HTL 624g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0151] An electron blocking layer (EBL) 626 is provided on the entire red HTL 624r of the red sub-pixel SPr, the entire green HTL 624g of the green sub-pixel SPg, and the entire HTL 622 of the blue sub-pixel SPb.

[0152] A red emitting material layer (EML) 630r is selectively provided on the EBL 626 of the red sub-pixel SPr.

[0153] A first green luminescent material layer (EML) 630g, a second green luminescent material layer (EML) 632g, and a third green luminescent material layer (EML) 634g may be sequentially disposed on the EBL 626 of the green sub-pixel SPg, or a first green luminescent material layer (EML) 630g, a second green luminescent material layer (EML) 632g, and a third green luminescent material layer (EML) 636g may be sequentially disposed on the EBL 626 of the green sub-pixel SPg.

[0154] The thickness of the first green EML 630g is greater than or equal to the thickness of the second green EML 632g, and the thickness of the third green EML 634g and 636g is less than the thickness of the second green EML 632g.

[0155] A first blue luminescent material layer (EML) 630b, a second blue luminescent material layer (EML) 632b, and a third blue luminescent material layer (EML) 634b may be sequentially provided on the EBL 626 of the blue sub-pixel SPb, or a first blue luminescent material layer (EML) 630b, a second blue luminescent material layer (EML) 632b, and a third blue luminescent material layer (EML) 636b may be sequentially provided on the EBL 626 of the blue sub-pixel SPb.

[0156] The thickness of the first blue EML 630b is greater than or equal to the thickness of the second blue EML 632b, and the thickness of the third blue EMLs 634b and 636b is less than the thickness of the second blue EML 632b.

[0157] The total thickness of the first green EML 630g, the second green EML 632g, and the third green EML 634g, or the total thickness of the first green EML 630g, the second green EML 632g, and the third green EML 636g, is greater than the total thickness of the first blue EML 630b, the second blue EML 632b, and the third blue EML 634b, or the total thickness of the first blue EML 630b, the second blue EML 632b, and the third blue EML 636b, and is less than the thickness of the red EML 630r.

[0158] The first green EML 630g includes a first green matrix and a green dopant, and the second green EML 632g includes a second green matrix and a green dopant. The third green EML 634g includes a green dopant, and the third green EML 636g includes a second green matrix.

[0159] The first blue EML 630b includes a first blue matrix and a blue dopant, and the second blue EML 632b includes a second blue matrix and a blue dopant. The third blue EML 634b includes a blue dopant, and the third blue EML 636b includes a second blue matrix.

[0160] The first green EML 630g, the second green EML 632g, and the third green EML 634g can have the same properties as... Figures 1 to 3 The first green EML 630g, the second green EML 632g, and the third green EML 636g have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0161] The first blue EML 630b, the second blue EML 632b, and the third blue EML 634b can have the same characteristics as... Figures 1 to 3 The first blue EML 630b, the second blue EML 632b, and the third blue EML 636b have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0162] The energy level of the triplet excited state T1 of the first green matrix 630g is lower than that of the triplet excited state T1 of the second green matrix 632g.

[0163] The energy level of the triplet excited state T1 of the first blue matrix of the first blue EML 630b is lower than that of the triplet excited state T1 of the second blue matrix of the second blue EML 632b.

[0164] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third green EML 634g has a value between the energy level of the LUMO of the second green EML 632g and the energy level of the LUMO of HBL 640, and the energy level of the highest occupied molecular orbital (HOMO) of the third green EML 634g has a value between the energy level of the HOMO of the second green EML 632g and the energy level of the HOMO of HBL 640.

[0165] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third blue EML 634b has a value between the energy level of the LUMO of the second blue EML 632b and the energy level of the LUMO of HBL 640, and the energy level of the highest occupied molecular orbital (HOMO) of the third blue EML 634b has a value between the energy level of the HOMO of the second blue EML 632b and the energy level of the HOMO of HBL 640.

[0166] Therefore, electrons are rapidly transferred to the first green EML 630g and the first blue EML 630b, thereby improving luminous efficiency.

[0167] The second green matrix of the third green EML 636g and the second blue matrix of the third blue EML 636b may include bipolar materials.

[0168] Therefore, electrons are rapidly transferred to the first green EML 630g and the first blue EML 630b, thereby improving luminous efficiency.

[0169] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0170] Hole blocking layers (HBL) 640 are provided on the entire red EML 630r of the red sub-pixel SPr, the entire third green EML 634g and 636g of the green sub-pixel SPg, and the entire third blue EML 634b and 636b of the blue sub-pixel SPb. An electron transporting layer (ETL) 642 is provided on the HBL 640 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0171] A first cathode 644 and a second cathode 646 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 642, and a first cover layer 650 and a second cover layer 652 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 646.

[0172] Figure 11 This is a view illustrating an organic light-emitting diode display device according to a seventh embodiment of the present disclosure. Parts identical to those in the first and second embodiments are omitted in the seventh embodiment.

[0173] exist Figure 11 In this disclosure, the organic light-emitting diode (OLED) display device 710 of the seventh embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0174] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 720 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 722 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 720.

[0175] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 722 to replace HIL 720.

[0176] A red hole transport layer (HTL) 724r is selectively provided in the red sub-pixel SPr on HTL 722, and a green hole transport layer (HTL) 724g is selectively provided in the green sub-pixel SPg on HTL 722.

[0177] The red HTL 724r and green HTL 724g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0178] An electron blocking layer (EBL) 726 is provided on the entire red HTL 724r of the red sub-pixel SPr, the entire green HTL 724g of the green sub-pixel SPg, and the entire HTL 722 of the blue sub-pixel SPb.

[0179] A first red luminescent material layer (EML) 730r, a second red luminescent material layer (EML) 732r, and a third red luminescent material layer (EML) 734r may be sequentially provided on the EBL 726 of the red sub-pixel SPr, or a first red luminescent material layer (EML) 730r, a second red luminescent material layer (EML) 732r, and a third red luminescent material layer (EML) 736r may be sequentially provided on the EBL 726 of the red sub-pixel SPr.

[0180] The thickness of the first red EML 730r is greater than or equal to the thickness of the second red EML 732r, and the thickness of the third red EMLs 734r and 736r is less than the thickness of the second red EML 732r.

[0181] A green EML 730g is selectively provided on the EBL 726 of the green sub-pixel SPg.

[0182] A first blue luminescent material layer (EML) 730b, a second blue luminescent material layer (EML) 732b, and a third blue luminescent material layer (EML) 734b may be sequentially provided on the EBL 726 of the blue sub-pixel SPb, or a first blue luminescent material layer (EML) 730b, a second blue luminescent material layer (EML) 732b, and a third blue luminescent material layer (EML) 736b may be sequentially provided on the EBL 726 of the blue sub-pixel SPb.

[0183] The thickness of the first blue EML 730b is greater than or equal to the thickness of the second blue EML 732b, and the thickness of the third blue EMLs 734b and 736b is less than the thickness of the second blue EML 732b.

[0184] The thickness of green EML 730g is greater than the total thickness of the first blue EML 730b, the second blue EML 732b, and the third blue EML 734b, or the total thickness of the first blue EML 730b, the second blue EML 732b, and the third blue EML 736b, and less than the total thickness of the first red EML 730r, the second red EML 732r, and the third red EML 734r, or the total thickness of the first red EML 730r, the second red EML 732r, and the third red EML 736r.

[0185] The first red EML 730r includes a first red matrix and a red dopant, and the second red EML 732r includes a second red matrix and a red dopant. The third red EML 734r includes a red dopant, and the third red EML 736r includes a second red matrix.

[0186] The first blue EML 730b includes a first blue matrix and a blue dopant, and the second blue EML 732b includes a second blue matrix and a blue dopant. The third blue EML 734b includes a blue dopant, and the third blue EML 736b includes a second blue matrix.

[0187] The first red EML 730r, the second red EML 732r, and the third red EML 734r can have the same characteristics as... Figures 1 to 3 The first red EML 730r, the second red EML 732r, and the third red EML 736r have the same structure as the first embodiment, and can have the same... Figures 4 to 6 The second embodiment has the same structure.

[0188] The first blue EML 730b, the second blue EML 732b, and the third blue EML 734b can have the same characteristics as... Figures 1 to 3 The first blue EML 730b, the second blue EML 732b, and the third blue EML 736b have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0189] The energy level of the triplet excited state T1 of the first red matrix, EML 730r, is lower than that of the triplet excited state T1 of the second red matrix, EML 732r.

[0190] The energy level of the triplet excited state T1 of the first blue matrix of the first blue EML 730b is lower than that of the triplet excited state T1 of the second blue matrix of the second blue EML 732b.

[0191] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third red EML 734r has a value between the energy level of the LUMO of the second red EML 732r and the energy level of the LUMO of HBL 740, and the energy level of the highest occupied molecular orbital (HOMO) of the third red EML 734r has a value between the energy level of the HOMO of the second red EML 732r and the energy level of the HOMO of HBL 740.

[0192] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third blue EML 734b has a value between the energy level of the LUMO of the second blue EML 732b and the energy level of the LUMO of HBL 740, and the energy level of the highest occupied molecular orbital (HOMO) of the third blue EML 734b has a value between the energy level of the HOMO of the second blue EML 732b and the energy level of the HOMO of HBL 740.

[0193] Therefore, electrons are rapidly transferred to the first red EML 730r and the first blue EML 730b, thereby improving luminous efficiency.

[0194] The second red matrix of the third red EML 736r and the second blue matrix of the third blue EML 736b may include bipolar materials.

[0195] Therefore, electrons are rapidly transferred to the first red EML 730r and the first blue EML 730b, thereby improving luminous efficiency.

[0196] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0197] Hole blocking layers (HBL) 740 are provided on the entire third red EML 734r or 736r of the red sub-pixel SPr, the entire green EML 730g of the green sub-pixel SPg, and the entire third blue EML 734b and 736b of the blue sub-pixel SPb. An electron transporting layer (ETL) 742 is provided on the HBL 740 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0198] A first cathode 744 and a second cathode 746 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 742, and a first cover layer 750 and a second cover layer 752 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 746.

[0199] Figure 12 This is a view illustrating an organic light-emitting diode display device according to an eighth embodiment of the present disclosure. Parts identical to those in the first and second embodiments in the eighth embodiment will be omitted.

[0200] exist Figure 12 In this disclosure, the organic light-emitting diode (OLED) display device 810 of the eighth embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0201] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 820 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 822 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 820.

[0202] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 822 to replace HIL 820.

[0203] A red hole transport layer (HTL) 824r is selectively provided in the red sub-pixel SPr on HTL 822, and a green hole transport layer (HTL) 824g is selectively provided in the green sub-pixel SPg on HTL 822.

[0204] The red HTL 824r and green HTL 824g can adjust the optical path length of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb to obtain a microcavity.

[0205] An electron blocking layer (EBL) 826 is provided on the entire red HTL 824r of the red sub-pixel SPr, the entire green HTL 824g of the green sub-pixel SPg, and the entire HTL 822 of the blue sub-pixel SPb.

[0206] A first red luminescent material layer (EML) 830r, a second red luminescent material layer (EML) 832r, and a third red luminescent material layer (EML) 834r can be sequentially provided on the EBL 826 of the red sub-pixel SPr, or a first red luminescent material layer (EML) 830r, a second red luminescent material layer (EML) 832r, and a third red luminescent material layer (EML) 836r can be sequentially provided on the EBL 826 of the red sub-pixel SPr.

[0207] The thickness of the first red EML 830r is greater than or equal to the thickness of the second red EML 832r, and the thickness of the third red EMLs 834r and 836r is less than the thickness of the second red EML 832r.

[0208] A first green luminescent material layer (EML) 830g, a second green luminescent material layer (EML) 832g, and a third green luminescent material layer (EML) 834g may be sequentially disposed on the EBL 826 of the green sub-pixel SPg, or a first green luminescent material layer (EML) 830g, a second green luminescent material layer (EML) 832g, and a third green luminescent material layer (EML) 836g may be sequentially disposed on the EBL 826 of the green sub-pixel SPg.

[0209] The thickness of the first green EML 830g is greater than or equal to the thickness of the second green EML 832g, and the thickness of the third green EMLs 834g and 836g is less than the thickness of the second green EML 832g.

[0210] A blue EML 830b is selectively provided on the EBL 826 of the blue subpixel SPb.

[0211] The total thickness of the first green EML 830g, the second green EML 832g, and the third green EML 834g, or the total thickness of the first green EML 830g, the second green EML 832g, and the third green EML 836g, is greater than the thickness of the blue EML 830b, and less than the total thickness of the first red EML 830r, the second red EML 832r, and the third red EML 834r, or the total thickness of the first red EML 830r, the second red EML 832r, and the third red EML 836r.

[0212] The first red EML 830r includes a first red matrix and a red dopant, and the second red EML 832r includes a second red matrix and a red dopant. The third red EML 834r includes a red dopant, and the third red EML 836r includes a second red matrix.

[0213] The first green EML 830g includes a first green matrix and a green dopant, and the second green EML 832g includes a second green matrix and a green dopant. The third green EML 834g includes a green dopant, and the third green EML 836g includes a second green matrix.

[0214] The first red EML 830r, the second red EML 832r, and the third red EML 834r can have the same characteristics as... Figures 1 to 3 The first red EML 830r, the second red EML 832r, and the third red EML 836r have the same structure as the first embodiment, and can have the same... Figures 4 to 6 The second embodiment has the same structure.

[0215] The first green EML 830g, the second green EML 832g, and the third green EML 834g can have the same properties as... Figures 1 to 3 The first green EML 830g, the second green EML 832g, and the third green EML 836g have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0216] The energy level of the triplet excited state T1 of the first red matrix, EML 830r, is lower than that of the triplet excited state T1 of the second red matrix, EML 832r.

[0217] The energy level of the triplet excited state T1 of the first green matrix (830g) is lower than that of the triplet excited state T1 of the second green matrix (832g).

[0218] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third red EML 834r has a value between the energy level of the LUMO of the second red EML 832r and the energy level of the LUMO of HBL 840, and the energy level of the highest occupied molecular orbital (HOMO) of the third red EML 834r has a value between the energy level of the HOMO of the second red EML 832r and the energy level of the HOMO of HBL 840.

[0219] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third green EML 834g has a value between the energy level of the LUMO of the second green EML 832g and the energy level of the LUMO of HBL 840, and the energy level of the highest occupied molecular orbital (HOMO) of the third green EML 834g has a value between the energy level of the HOMO of the second green EML 832g and the energy level of the HOMO of HBL 840.

[0220] Therefore, electrons are rapidly transferred to the first red EML 830r and the first green EML 830g, thereby improving luminous efficiency.

[0221] The second red matrix of the third red EML 836r and the second green matrix of the third green EML 836g may include bipolar materials.

[0222] Therefore, electrons are rapidly transferred to the first red EML 830r and the first green EML 830g, thereby improving luminous efficiency.

[0223] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0224] Hole blocking layers (HBLs) 840 are provided on the entire third red EML 834r or 836r of the red sub-pixel SPr, the entire third green EML 834g or 836g of the green sub-pixel SPg, and the entire blue EML 830b of the blue sub-pixel SPb. An electron transporting layer (ETL) 842 is provided on the HBL 840 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0225] A first cathode 844 and a second cathode 846 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 842, and a first cover layer 850 and a second cover layer 852 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 846.

[0226] Figure 13 This is a view illustrating an organic light-emitting diode display device according to a ninth embodiment of the present disclosure. Parts identical to those in the first and second embodiments are omitted in the ninth embodiment.

[0227] exist Figure 13 In this disclosure, the organic light-emitting diode (OLED) display device 810 of the ninth embodiment includes a red sub-pixel SPr, a green sub-pixel SPg, and a blue sub-pixel SPb.

[0228] An anode (not shown) is provided in each of the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on a substrate (not shown). A hole injection layer (HIL) 920 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the anode, and a hole transport layer (HTL) 922 is provided in the entire red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb on the HIL 920.

[0229] In another embodiment, a Positivetype Hole Transporting Layer (P-HTL) can be provided between the anode and HTL 922 to replace HIL 920.

[0230] A red hole transport layer (HTL) 924r is selectively provided in the red sub-pixel SPr on HTL 922, and a green hole transport layer (HTL) 924g is selectively provided in the green sub-pixel SPg on HTL 922.

[0231] The red HTL 924r and green HTL 924g can adjust the optical path length of the red subpixel SPr, green subpixel SPg, and blue subpixel SPb to obtain a microcavity.

[0232] An electron blocking layer (EBL) 926 is provided on the entire red HTL 924r of the red sub-pixel SPr, the entire green HTL 924g of the green sub-pixel SPg, and the entire HTL 922 of the blue sub-pixel SPb.

[0233] A first red luminescent material layer (EML) 930r, a second red luminescent material layer (EML) 932r, and a third red luminescent material layer (EML) 934r can be sequentially provided on the EBL 926 of the red sub-pixel SPr, or a first red luminescent material layer (EML) 930r, a second red luminescent material layer (EML) 932r, and a third red luminescent material layer (EML) 936r can be sequentially provided on the EBL 926 of the red sub-pixel SPr.

[0234] The thickness of the first red EML 930r is greater than or equal to the thickness of the second red EML 932r, and the thickness of the third red EMLs 934r and 936r is less than the thickness of the second red EML 932r.

[0235] A first green luminescent material layer (EML) 930g, a second green luminescent material layer (EML) 932g, and a third green luminescent material layer (EML) 934g may be sequentially disposed on the EBL 926 of the green sub-pixel SPg, or a first green luminescent material layer (EML) 930g, a second green luminescent material layer (EML) 932g, and a third green luminescent material layer (EML) 936g may be sequentially disposed on the EBL 926 of the green sub-pixel SPg.

[0236] The thickness of the first green EML 930g is greater than or equal to the thickness of the second green EML 932g, and the thickness of the third green EML 934g and 936g is less than the thickness of the second green EML 932g.

[0237] A first blue luminescent material layer (EML) 930b, a second blue luminescent material layer (EML) 932b, and a third blue luminescent material layer (EML) 934b may be sequentially provided on the EBL 926 of the blue sub-pixel SPb, or a first blue luminescent material layer (EML) 930b, a second blue luminescent material layer (EML) 932b, and a third blue luminescent material layer (EML) 936b may be sequentially provided on the EBL 926 of the blue sub-pixel SPb.

[0238] The thickness of the first blue EML 930b is greater than or equal to the thickness of the second blue EML 932b, and the thickness of the third blue EMLs 934b and 936b is less than the thickness of the second blue EML 932b.

[0239] The total thickness of the first green EML 930g, the second green EML 932g, and the third green EML 934g, or the total thickness of the first green EML 930g, the second green EML 932g, and the third green EML 936g, is greater than the total thickness of the first blue EML 930b, the second blue EML 932b, and the third blue EML 934b, or the total thickness of the first blue EML 930b, the second blue EML 932b, and the third blue EML 936b, and is less than the total thickness of the first red EML 930r, the second red EML 932r, and the third red EML 934r, or the total thickness of the first red EML 930r, the second red EML 932r, and the third red EML 936r.

[0240] The first red EML 930r includes a first red matrix and a red dopant, and the second red EML 932r includes a second red matrix and a red dopant. The third red EML 934r includes a red dopant, and the third red EML 936r includes a second red matrix.

[0241] The first green EML 930g includes a first green matrix and a green dopant, and the second green EML 932g includes a second green matrix and a green dopant. The third green EML 934g includes a green dopant, and the third green EML 936g includes a second green matrix.

[0242] The first blue EML 930b includes a first blue matrix and a blue dopant, and the second blue EML 932b includes a second blue matrix and a blue dopant. The third blue EML 934b includes a blue dopant, and the third blue EML 936b includes a second blue matrix.

[0243] The first red EML 930r, the second red EML 932r, and the third red EML 934r can have the same... Figures 1 to 3 The first red EML 930r, the second red EML 932r, and the third red EML 936r have the same structure as the first embodiment, and can have the same... Figures 4 to 6 The second embodiment has the same structure.

[0244] The first green EML 930g, the second green EML 932g, and the third green EML 934g can have the same properties as... Figures 1 to 3 The first green EML 930g, the second green EML 932g, and the third green EML 936g have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0245] The first blue EML 930b, the second blue EML 932b, and the third blue EML 934b can have the same characteristics as... Figures 1 to 3 The first blue EML 930b, the second blue EML 932b, and the third blue EML 936b have the same structure as the first embodiment, and can have the same characteristics as the first embodiment. Figures 4 to 6 The second embodiment has the same structure.

[0246] The energy level of the triplet excited state T1 of the first red matrix, EML 930r, is lower than that of the triplet excited state T1 of the second red matrix, EML 932r.

[0247] The energy level of the triplet excited state T1 of the first green matrix in the first green EML 930g is lower than that of the triplet excited state T1 of the second green matrix in the second green EML 932g.

[0248] The energy level of the triplet excited state T1 of the first blue matrix of the first blue EML 930b is lower than that of the triplet excited state T1 of the second blue matrix of the second blue EML 932b.

[0249] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third red EML 934r has a value between the energy level of the LUMO of the second red EML 932r and the energy level of the LUMO of HBL 940, and the energy level of the highest occupied molecular orbital (HOMO) of the third red EML 934r has a value between the energy level of the HOMO of the second red EML 932r and the energy level of the HOMO of HBL 940.

[0250] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third green EML 934g has a value between the energy level of the LUMO of the second green EML 932g and the energy level of the LUMO of HBL 940, and the energy level of the highest occupied molecular orbital (HOMO) of the third green EML 934g has a value between the energy level of the HOMO of the second green EML 932g and the energy level of the HOMO of HBL 940.

[0251] The energy level of the lowest unoccupied molecular orbital (LUMO) of the third blue EML 934b has a value between the energy level of the LUMO of the second blue EML 932b and the energy level of the LUMO of HBL 940, and the energy level of the highest occupied molecular orbital (HOMO) of the third blue EML 934b has a value between the energy level of the HOMO of the second blue EML 932b and the energy level of the HOMO of HBL 940.

[0252] Therefore, electrons are rapidly transferred to the first red EML 930r, the first green EML 930g, and the first blue EML 930b, thereby improving luminous efficiency.

[0253] The second red matrix of the third red EML 936r, the second green matrix of the third green EML 936g, and the second blue matrix of the third blue EML 936b may include bipolar materials.

[0254] Therefore, electrons are rapidly transferred to the first red EML 930r, the first green EML 930g, and the first blue EML 930b, thereby improving luminous efficiency.

[0255] Furthermore, the formation of multiple EMLs within a single chamber simplifies the manufacturing process and prevents contamination during transfer or degradation caused by misalignment of the fine metal mask.

[0256] Hole blocking layers (HBLs) 940 are provided on the entire third red EML 934r or 936r of the red sub-pixel SPr, the entire third green EML 934g or 936g of the green sub-pixel SPg, and the entire third blue EML 934b or 936b of the blue sub-pixel SPb. An electron transporting layer (ETL) 942 is provided on the HBL 940 in the red sub-pixel SPr, green sub-pixel SPg, and blue sub-pixel SPb.

[0257] A first cathode 944 and a second cathode 946 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the ETL 942, and a first cover layer 950 and a second cover layer 952 are sequentially provided in the entire red sub-pixel SPr, green sub-pixel SPg and blue sub-pixel SPb on the second cathode 946.

[0258] Therefore, in the OLED display device disclosed herein, efficiency is improved and productivity is increased by forming three EML layers—a first EML of a first matrix and dopant, a second EML of a second matrix and dopant, and a third EML of dopant—in a single chamber.

[0259] In addition, efficiency is improved and productivity is increased by forming three EML layers in a single chamber: a first EML of a first matrix and dopant, a second EML of a second matrix and dopant, and a third EML of a second matrix.

[0260] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from its scope. Therefore, it is intended that this disclosure cover such modifications and variations provided herein, which fall within the scope of the appended claims.

Claims

1. An organic light-emitting diode (OLED) display device, comprising: The substrate has multiple sub-pixels; as well as A light-emitting material layer is located in multiple sub-pixels on the substrate. Wherein, the light-emitting material layer in at least one of the plurality of sub-pixels includes: The first luminescent material layer includes a first matrix and a dopant; A second luminescent material layer, located on the first luminescent material layer, includes a second matrix and the dopant; and A third luminescent material layer is located on the second luminescent material layer and includes one of the dopant and the second matrix. Wherein, when the third light-emitting material layer includes the dopant, the display device further includes a hole-blocking layer located on the third light-emitting material layer, and the lowest unoccupied molecular orbital energy level of the third light-emitting material layer has a value between the lowest unoccupied molecular orbital energy level of the second light-emitting material layer and the lowest unoccupied molecular orbital energy level of the hole-blocking layer, and the highest occupied molecular orbital energy level of the third light-emitting material layer has a value between the highest occupied molecular orbital energy level of the second light-emitting material layer and the highest occupied molecular orbital energy level of the hole-blocking layer. Wherein, when the third luminescent material layer includes the second matrix, the second matrix includes a bipolar material.

2. The display device as claimed in claim 1, wherein, The thickness of the third luminescent material layer is less than the thickness of the second luminescent material layer.

3. The display device as claimed in claim 1, wherein, The energy level of the triplet excited state of the first matrix of the first luminescent material layer is lower than the energy level of the triplet excited state of the second matrix of the second luminescent material layer.

4. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first blue matrix, the dopant is a blue dopant, and the second matrix is ​​a second blue matrix. Wherein, the luminescent material layers of the red sub-pixel and the green sub-pixel are respectively a red luminescent material layer and a green luminescent material layer, and The light-emitting material layer of the blue sub-pixel includes a first blue light-emitting material layer having the first blue matrix and the blue dopant, a second blue light-emitting material layer having the second blue matrix and the blue dopant, and a third blue light-emitting material layer having one of the blue dopant and the second blue matrix.

5. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first green matrix, the dopant is a green dopant, and the second matrix is ​​a second green matrix. Wherein, the light-emitting material layers of the red sub-pixel and the blue sub-pixel are respectively a red light-emitting material layer and a blue light-emitting material layer, and The green sub-pixel's luminescent material layer includes a first green luminescent material layer having the first green matrix and the green dopant, a second green luminescent material layer having the second green matrix and the green dopant, and a third green luminescent material layer having one of the green dopant and the second green matrix.

6. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first red matrix, the dopant is a red dopant, and the second matrix is ​​a second red matrix. Wherein, the light-emitting material layers of the green sub-pixel and the blue sub-pixel are a green light-emitting material layer and a blue light-emitting material layer, respectively, and The luminescent material layer of the red sub-pixel includes a first red luminescent material layer having the first red matrix and the red dopant, a second red luminescent material layer having the second red matrix and the red dopant, and a third red luminescent material layer having one of the red dopant and the second red matrix.

7. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first green matrix and a first blue matrix, the dopant is a green dopant and a blue dopant, and the second matrix is ​​a second green matrix and a second blue matrix. The luminescent material layer of the red sub-pixel is a red luminescent material layer. The green sub-pixel's luminescent material layer comprises a first green luminescent material layer having the first green matrix and the green dopant, a second green luminescent material layer having the second green matrix and the green dopant, and a third green luminescent material layer having one of the green dopant and the second green matrix. The light-emitting material layer of the blue sub-pixel includes a first blue light-emitting material layer having the first blue matrix and the blue dopant, a second blue light-emitting material layer having the second blue matrix and the blue dopant, and a third blue light-emitting material layer having one of the blue dopant and the second blue matrix.

8. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first red matrix and a first blue matrix, the dopant is a red dopant and a blue dopant, and the second matrix is ​​a second red matrix and a second blue matrix. The light-emitting material layer of the green sub-pixel is a green light-emitting material layer. The luminescent material layer of the red sub-pixel includes a first red luminescent material layer having the first red matrix and the red dopant, a second red luminescent material layer having the second red matrix and the red dopant, and a third red luminescent material layer having one of the red dopant and the second red matrix. The light-emitting material layer of the blue sub-pixel includes a first blue light-emitting material layer having the first blue matrix and the blue dopant, a second blue light-emitting material layer having the second blue matrix and the blue dopant, and a third blue light-emitting material layer having one of the blue dopant and the second blue matrix.

9. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first red matrix and a first green matrix, the dopant is a red dopant and a green dopant, and the second matrix is ​​a second red matrix and a second green matrix. The light-emitting material layer of the blue sub-pixel is a blue light-emitting material layer. The luminescent material layer of the red sub-pixel includes a first red luminescent material layer having the first red matrix and the red dopant, a second red luminescent material layer having the second red matrix and the red dopant, and a third red luminescent material layer having one of the red dopant and the second red matrix. The green sub-pixel's luminescent material layer includes a first green luminescent material layer having the first green matrix and the green dopant, a second green luminescent material layer having the second green matrix and the green dopant, and a third green luminescent material layer having one of the green dopant and the second green matrix.

10. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels. Wherein, the first matrix is ​​a first red matrix, a first green matrix, and a first blue matrix, the dopant is a red dopant, a green dopant, and a blue dopant, and the second matrix is ​​a second red matrix, a second green matrix, and a second blue matrix. The luminescent material layer of the red sub-pixel includes a first red luminescent material layer having the first red matrix and the red dopant, a second red luminescent material layer having the second red matrix and the red dopant, and a third red luminescent material layer having one of the red dopant and the second red matrix. The green sub-pixel's luminescent material layer comprises a first green luminescent material layer having the first green matrix and the green dopant, a second green luminescent material layer having the second green matrix and the green dopant, and a third green luminescent material layer having one of the green dopant and the second green matrix. The light-emitting material layer of the blue sub-pixel includes a first blue light-emitting material layer having the first blue matrix and the blue dopant, a second blue light-emitting material layer having the second blue matrix and the blue dopant, and a third blue light-emitting material layer having one of the blue dopant and the second blue matrix.

11. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels, and the display device further includes: The anode is located throughout the entire red, green, and blue sub-pixels on the substrate; One of the hole injection layer and the P-type hole transport layer is located in the entire red sub-pixel, green sub-pixel and blue sub-pixel on the anode; A hole transport layer is located over one of the hole injection layer and the P-type hole transport layer, within the entire red sub-pixel, green sub-pixel, and blue sub-pixel; The red hole transport layer and the green hole transport layer are located in the red sub-pixel and the green sub-pixel on one of the hole injection layer and the P-type hole transport layer, respectively. An electron blocking layer is located on the entire red hole transport layer and green hole transport layer of the red sub-pixel and the entire hole transport layer of the green sub-pixel, and on the entire hole transport layer of the blue sub-pixel. A hole blocking layer is located on the entire light-emitting material layer of the red sub-pixel, the green sub-pixel, and the blue sub-pixel; An electron transport layer is located on the entire hole blocking layer of the red sub-pixel, the green sub-pixel, and the blue sub-pixel; The first cathode and the second cathode are sequentially located on the entire electron transport layer of the red sub-pixel, the green sub-pixel, and the blue sub-pixel; and The first and second overlay layers are located sequentially on the entire second cathode of the red, green, and blue sub-pixels.

12. The display device as claimed in claim 1, wherein, The plurality of sub-pixels includes red sub-pixels, green sub-pixels, and blue sub-pixels, and The thickness of the luminescent material layer of the green sub-pixel is greater than the thickness of the luminescent material layer of the blue sub-pixel but less than the thickness of the luminescent material layer of the red sub-pixel.

13. A method for manufacturing an organic light-emitting diode (OLED) display device, comprising: A substrate is disposed in a chamber, the chamber including a first vapor deposition source for delivering a first substrate to a first region, a second vapor deposition source for delivering a second substrate to a second region separated from the first region, a third vapor deposition source for delivering a dopant to a third region corresponding to the sum of the first region and the second region, and a first baffle, a second baffle, and a third baffle corresponding to the first vapor deposition source to the third vapor deposition source, respectively, the substrate being disposed in the first region; A first light-emitting material layer is formed by depositing the first matrix and the dopant of the first vapor deposition source and the third vapor deposition source on the substrate when the first baffle and the third baffle are in an open state. The substrate is transferred to the second region, and a second light-emitting material layer is formed by depositing the second matrix and the dopant of the second vapor deposition source and the third vapor deposition source on the substrate when the second baffle and the third baffle are in an open state. A third luminescent material layer is formed by depositing the dopant of the third vapor deposition source on the substrate when the second baffle is in a closed state and the third baffle is in an open state; as well as A hole-blocking layer is formed on the third luminescent material layer. The energy level of the lowest unoccupied molecular orbital of the third luminescent material layer has a value between the energy level of the lowest unoccupied molecular orbital of the second luminescent material layer and the energy level of the lowest unoccupied molecular orbital of the hole blocking layer, and the energy level of the highest occupied molecular orbital of the third luminescent material layer has a value between the energy level of the highest occupied molecular orbital of the second luminescent material layer and the energy level of the highest occupied molecular orbital of the hole blocking layer.

14. A method for manufacturing an organic light-emitting diode (OLED) display device, comprising: A substrate is disposed in a chamber, the chamber including a first vapor deposition source for delivering a first substrate to a first region, a second vapor deposition source for delivering a second substrate to a second region separated from the first region, a third vapor deposition source for delivering a dopant to a third region corresponding to the sum of the first region and the second region, and a first baffle, a second baffle, and a third baffle corresponding to the first vapor deposition source to the third vapor deposition source, respectively, the substrate being disposed in the first region; A first light-emitting material layer is formed by depositing the first matrix and the dopant of the first vapor deposition source and the third vapor deposition source on the substrate when the first baffle and the third baffle are in an open state. The substrate is transferred to the second region, and a second light-emitting material layer is formed by depositing the second matrix and the dopant of the second vapor deposition source and the third vapor deposition source on the substrate when the second baffle and the third baffle are in an open state. as well as A third luminescent material layer is formed by depositing the second matrix of the second vapor deposition source on the substrate when the second baffle is in an open state and the third baffle is in a closed state. The second matrix comprises a bipolar material.

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