WO2022007141A1 - 一种有机发光二极管器件及其显示面板 - Google Patents

一种有机发光二极管器件及其显示面板 Download PDF

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Publication number
WO2022007141A1
WO2022007141A1 PCT/CN2020/111220 CN2020111220W WO2022007141A1 WO 2022007141 A1 WO2022007141 A1 WO 2022007141A1 CN 2020111220 W CN2020111220 W CN 2020111220W WO 2022007141 A1 WO2022007141 A1 WO 2022007141A1
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layer
light emitting
blue light
diode device
emitting diode
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French (fr)
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李维维
刘胜芳
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to US17/261,603 priority Critical patent/US11825738B2/en
Publication of WO2022007141A1 publication Critical patent/WO2022007141A1/zh
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
    • H10K50/131—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit with spacer layers between the electroluminescent layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
    • H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/10—Triplet emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene

Definitions

  • the present invention relates to the field of organic light emitting diodes, in particular to an organic light emitting diode device and a display panel thereof.
  • OLED active matrix organic light emitting display device
  • an organic light emitting diode device generally includes an anode and a cathode, and a light-emitting unit located between the anode and the cathode. According to the number of light emitting units, organic light emitting diode devices can be divided into juxtaposed organic light emitting diode devices and stacked series organic light emitting diode devices.
  • FIG. 1 is a juxtaposed organic light emitting diode device 910.
  • the light emitting unit 93 includes a hole transport layer 931 (HTL), a light emitting material layer 932 ( EML), an electron transport layer 933 (ETL), wherein the light-emitting material layer (EML) includes a red light-emitting layer R, a green light-emitting layer G, and a blue light-emitting layer B.
  • HTL hole transport layer 931
  • EML light emitting material layer 932
  • ETL electron transport layer 933
  • FIG. 2 is a stacked series organic light emitting diode device 920, a plurality of light emitting units 93 connected in series are arranged between the anode 91 and the cathode 92, and a charge generating layer 94 ( CGL) connection; each light-emitting unit 93 includes a hole transport layer 931 (HTL), a light-emitting material layer 932 (EML), an electron transport layer 933 (ETL), wherein the light-emitting material layer (EML) includes a red light-emitting layer R, a green light-emitting layer layer G and blue light-emitting layer B.
  • HTL hole transport layer 931
  • EML light-emitting material layer 932
  • ETL electron transport layer 933
  • the stacked series organic light emitting diode device 920 has high current luminous efficiency, and its luminous efficiency can be multiplied with the increase of the number of 93 series light emitting units. Under the same brightness, the lifetime of the tandem structure organic light emitting diode device 920 grows exponentially relative to the juxtaposed organic light emitting diode device 910 .
  • the present application provides an organic light emitting diode device and a display panel thereof.
  • the current efficiency and lifetime of the juxtaposed organic light emitting diode device can be improved, and the shortage of blue light lifetime and efficiency can be solved; on the other hand, the stacked series organic light emitting diode can be avoided.
  • the device uses a multi-channel precision mask (mask) process to make multiple chambers, which reduces the production cost, improves the aperture ratio, and is beneficial to improve the overall yield.
  • An embodiment of the present application provides an organic light emitting diode device, which includes a light emitting material layer, the light emitting material layer includes a first common blue light emitting layer, a light emitting unit layer, and a second common blue light emitting layer; the light emitting unit layer is disposed on the On the first common blue light-emitting layer, it includes a red light-emitting unit, a green light-emitting unit and a blue light-emitting unit arranged side by side; the blue light-emitting unit includes a blue light-emitting layer and the upper and lower surfaces of the blue light-emitting layer. an electrically connected charge connection layer; the second common blue light emitting layer is disposed on the light emitting unit layer.
  • the thicknesses of the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit are equal.
  • the charge connection layer is disposed corresponding to the blue light-emitting layer, and the charge connection layer corresponds to the shape and size of the blue light-emitting layer.
  • the number of the charge connection layer is one, and the charge connection layer is arranged between the first common blue light emitting layer and the blue light emitting layer, or the charge connection layer is arranged on the blue light emitting layer. between the light-emitting layer and the second common blue light-emitting layer.
  • the number of the charge connection layers is two, one of the charge connection layers is arranged between the first common blue light emitting layer and the blue light emitting layer, and the other charge connection layer is arranged between the first common blue light emitting layer and the blue light emitting layer. between the blue light-emitting layer and the second common blue light-emitting layer.
  • the thickness of the charge connection layer is in the range of 3nm-7nm.
  • the red light-emitting unit, the green light-emitting unit and the blue light-emitting unit are all quantum dot light-emitting layers.
  • the organic light emitting diode device further includes an anode layer, a hole injection layer, a hole transport layer, an electron transport layer and a cathode layer; the hole injection layer is provided on the anode layer; the hole transport layer The layer is arranged on the hole injection layer; the luminescent material layer is arranged on the hole transport layer; the electron transport layer is arranged on the luminescent material layer; the cathode layer is arranged on the electron transport layer layer.
  • the host material of the second shared blue light emitting layer is a material of partial electron type, and the general formula of its molecular structure is:
  • the blue light host may also include at least one compound of anthracene dinaphthalene, anthracene diphenyl, anthracene naphthalene biphenyl and anthracene diphenyl.
  • the host material of the second shared blue light emitting layer is a material of partial electron type, and the general formula of its molecular structure is:
  • R1, R2, R3, R4, R5, R6 are all hydrogen atoms, halogen atoms, hydroxyl groups, cyano groups, nitro groups or groups containing carbonyl groups with less than 20 carbon atoms, groups containing carbonyl ester groups , an alkyl group, an alkenyl group, an alkoxy group, a group containing a silyl group having 30 or less carbon atoms, a group containing an aryl group, a group containing a heterocyclic group, a group containing an amino group, or a derivative thereof .
  • the host material of the second shared blue light emitting layer is a material of partial electron type, and its molecular structure is any one of the following structural formulas:
  • the host material of the first shared blue light emitting layer is a hole-biased material, which includes N,N'-diphenyl-N,N'-(1-naphthyl)-1,1'- Biphenyl-4,4'-diamine (NPB) or 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA);
  • the first common blue light emitting layer also includes blue fluorescent doping dopant, the blue fluorescent dopant includes 4,4'-bis(2,2'-distyryl)-1,1'-biphenyl (DPVBi), spiro-DPVBi (spiro-DPVBi), spiro-DPVBi -6P (spiro-6P) any of.
  • the present application also provides a display panel including any one of the above organic light emitting diode devices.
  • the beneficial effect of the present application is to provide an organic light emitting diode device and a display panel.
  • the current of the juxtaposed organic light emitting diode device can be increased by connecting the first common blue light emitting layer and the second common blue light emitting layer to the blue light emitting unit.
  • the number of structural film layers is reduced compared with the stacked series organic light-emitting diode device, that is, the number of chambers is reduced by multiple times, and the use of multiple precision masks ( mask) the process of making multiple chambers, which reduces the production cost, increases the aperture ratio, and is conducive to improving the overall yield.
  • FIG. 1 is a schematic structural diagram of a juxtaposed organic light emitting diode device.
  • FIG. 2 is a schematic structural diagram of a stacked tandem organic light emitting diode device.
  • FIG. 3 is a schematic structural diagram of an organic light emitting diode device according to an embodiment of the present application.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • an embodiment of the present application provides an organic light emitting diode device 100 , which includes a light emitting material layer 4 , and the light emitting material layer 4 includes a first common blue light emitting layer 41 , a light emitting unit layer 42 and a second light emitting material layer 4 .
  • the light emitting unit layer 42 is disposed on the first common blue light emitting layer 41, and includes a red light emitting unit 421, a green light emitting unit 422 and a blue light emitting unit 423 arranged side by side;
  • the color light-emitting unit 423 has a three-layer structure, including a blue light-emitting layer and a charge connection layer 4232 electrically connected to the upper and lower surfaces of the blue light-emitting layer 4231; the second common blue light-emitting layer 43 is provided on the blue light-emitting layer 4231. on the light-emitting unit layer 42 .
  • the present application improves the current efficiency and lifespan of the juxtaposed organic light emitting diode device, and solves the shortage of blue light lifespan and efficiency;
  • the type organic light emitting diode device avoids the process of using multiple precision masks to make multiple chambers, which reduces the production cost, improves the aperture ratio, and is beneficial to improve the overall yield.
  • the thickness of the red light-emitting unit 421 , the green light-emitting unit 422 , and the blue light-emitting unit 423 are equal, so that the thickness of the light-emitting unit layer 42 is uniform.
  • the charge connection layer 4232 is disposed corresponding to the blue light-emitting layer 4231 , and the charge connection layer 4232 corresponds to the shape and size of the blue light-emitting layer 4231 .
  • the number of the charge connection layers 4232 is two, and one charge connection layer 4232 is disposed between the first common blue light emitting layer 41 and the blue light emitting layer 4231 During this time, another charge connection layer 4232 is disposed between the blue light-emitting layer 4231 and the second common blue light-emitting layer 43; The upper surface is electrically connected, and the other charge connection layer 4232 is electrically connected to the lower surface of the blue light-emitting layer 4231 .
  • the number of the charge connection layer 4232 may also be only one, and the charge connection layer 4232 is disposed between the first common blue light emitting layer 41 and the blue light emitting layer 4231, or all The charge connection layer is disposed between the blue light-emitting layer 4231 and the second common blue light-emitting layer 43; that is, the charge connection layer 4232 is electrically connected to the upper surface of the blue light-emitting layer 4231 or is connected to the blue light-emitting layer 4231. The lower surface of the blue light-emitting layer 4231 is electrically connected.
  • the thickness of the charge connection layer 4232 electrically connected to the upper surface and the lower surface of the blue light-emitting layer 4231 is the same, and both are 3nm-7nm, preferably 5nm; the charge connection layer 4232 plays the role of In series action, the thickness of the blue light-emitting layer 4231 can be controlled by adjusting the thickness of the charge connection layer 4232 .
  • the thickness of the first common blue light emitting layer 41 plus the second common blue light emitting layer 43 is equal to the thickness of the green light optical compensation layer, about 30nm-40nm, which can avoid a set of masks for making green light optical compensation plate.
  • the red light-emitting unit 421, the green light-emitting unit 422 and the blue light-emitting unit 423 are all quantum dot light-emitting layers, which have better light-emitting effect.
  • the organic light emitting diode device 100 further includes an anode layer 1, a hole injection layer 2, a hole transport layer 3, an electron transport layer 5 and a cathode layer 6;
  • the hole injection layer 2 is provided on the on the anode layer 1;
  • the hole transport layer 3 is arranged on the hole injection layer 2;
  • the luminescent material layer 4 is arranged on the hole transport layer 3;
  • the electron transport layer 5 is arranged on the On the luminescent material layer 4 ;
  • the cathode layer 6 is provided on the electron transport layer 5 .
  • the host material of the second shared blue light emitting layer 43 is a material of partial electron type, and the general formula of its molecular structure is:
  • the blue light host may also include at least one compound of anthracene dinaphthalene, anthracene diphenyl, anthracene naphthalene biphenyl and anthracene diphenyl.
  • the host material of the second shared blue light emitting layer 43 is a material of partial electron type, and the general formula of its molecular structure is:
  • R1, R2, R3, R4, R5, R6 are all hydrogen atoms, halogen atoms, hydroxyl groups, cyano groups, nitro groups or groups containing carbonyl groups with less than 20 carbon atoms, groups containing carbonyl ester groups , an alkyl group, an alkenyl group, an alkoxy group, a group containing a silyl group having 30 or less carbon atoms, a group containing an aryl group, a group containing a heterocyclic group, a group containing an amino group, or a derivative thereof .
  • the host material of the second shared blue light emitting layer 43 is a material of partial electron type, and its molecular structure is any one of the following structural formulas:
  • the host material of the first common blue light emitting layer 41 is a hole-biased material, which includes N,N'-diphenyl-N,N'-(1-naphthyl)-1, 1'-biphenyl-4,4'-diamine (NPB) or 4,4',4"-tris(carbazol-9-yl)triphenylamine (TCTA);
  • the first common blue light emitting layer 41 also Including blue fluorescent dopant, the blue fluorescent dopant includes 4,4'-bis(2,2'-distyryl)-1,1'-biphenyl (DPVBi), spiro-DPVBi (spiro- Any of DPVBi) and spiro-6P (spiro-6P).
  • the host material of the second charge connection layer 4232 in this embodiment is an electron-biased material, and the highest occupied orbital (Homo) energy level of the host material of the second charge connection layer 4232 is smaller than that of the red light-emitting unit 421 and the green light-emitting unit 421 .
  • the highest occupied orbital (Homo) energy level of the unit 422 plays the role of blocking holes for the red light-emitting unit 421 and the green light-emitting unit 422, and the host material of the second charge connection layer 4232 is a hole-biased material , the highest occupied orbital (Homo) energy level of the red light-emitting unit 421 and the green light-emitting unit 422 is smaller than the highest occupied orbital (Homo) energy level of the host material of the second charge connection layer 4232 .
  • the present application also provides a display panel including any one of the above organic light emitting diode devices 100 .
  • the beneficial effect of the present application is to provide an organic light emitting diode device 100 and a display panel, on the one hand, the current efficiency and lifespan of the juxtaposed organic light emitting diode device are improved, and the shortage of blue light lifespan and efficiency is solved;
  • the tandem OLED device reduces the number of structural film layers, that is, the number of multiple chambers is reduced, the process of using multiple precision masks to make multiple chambers is avoided, the production cost is reduced, and the aperture ratio is improved. , which is beneficial to improve the overall yield.

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Abstract

本发明公开了一种有机发光二极管器件及显示面板。显示面板包括有机发光二极管器件，有机发光二极管器件包括发光材料层，发光材料层包括第一共用蓝光发光层、发光单元层及第二共用蓝光发光层；发光单元层包括红色发光单元、绿色发光单元及蓝色发光单元；蓝色发光单元包括层叠设置的蓝色发光层和电荷连接层。

Description

一种有机发光二极管器件及其显示面板 技术领域
本发明涉及有机发光二极管领域，特别涉及一种有机发光二极管器件及其显示面板。
背景技术
目前有源矩阵有机发光显示器件(AMOLED)技术已广泛应用于智能手机中，并继续朝低功耗、低成本、大尺寸方向发展。由于有机发光二极管器件(OLED)相对于液晶显示器(LCD)可用于柔性屏，随着材料技术的进步，发光寿命短的问题得到了很大的改善，因此在汽车领域，主机厂和供应商也纷纷研发有机发光二极管器件(OLED)技术。从传统的仪表、中控到平视显示器(HUD)、流媒体后视镜、照明等均有涉及。
目前在国际上车载有机发光二极管器件技术，韩国的三星公司和LG公司处于领先地位，国内的京东方(BOE)公司和天马微电子股份有限公司紧跟其后。目前三星公司主推的是并置式(SBS)的车载有机发光二极管器件，与手机结构类似，该结构无法达到层叠串联式(Tandem)结构的电流效率和寿命水平。LG公司主推的是层叠串联式(Tandem)结构的车载有机发光二极管器件，相对于并置器件结构，电流效率可提升1.5-2倍，寿命可以提升2-4倍。但串联工作组结构需要增加一倍蒸镀腔室，增加了量产工艺的复杂性，不利于量产生产。
如图1、图2所示，有机发光二极管器件通常包括阳极和阴极，以及位于阳极和阴极之间的发光单元。根据发光单元数目的不同，有机发光二极管器件可以分为并置式有机发光二极管器件和层叠串联式有机发光二极管器件。
如图1所示，图1为并置式有机发光二极管器件910，位于阳极91和阴极92之间只有一个发光单元93，该发光单元93包括空穴传输层931(HTL)、发光材料层932(EML)、电子传输层933(ETL)，其中发光材料层(EML)包括红色发光层R、绿色发光层G以及蓝色发光层B。
如图2所示，图2为层叠串联式有机发光二极管器件920，位于阳极91和阴极92之间设有多个串联的发光单元93，相邻的发光单元93之间通过电荷产生层 94(CGL)连接；每一发光单元93包括空穴传输层931(HTL)、发光材料层932(EML)、电子传输层933(ETL)，其中发光材料层(EML)包括红色发光层R、绿色发光层G以及蓝色发光层B。层叠串联式有机发光二极管器件920拥有较高的电流发光效率，其发光效率随着串联发光单元93个数的增加，可以成倍数成长。在相同的亮度之下，相对于并置式有机发光二极管器件910，串联式结构有机发光二极管器件920的寿命成指数成长。
但在车载OLED器件中，蓝光的电流效率和寿命一直是阻碍应用的不足。而且层叠串联式有机发光二极管器件的制作过程复杂，需使用多道精密掩膜板，在制作多倍腔室时会导致制作成本增加、开口率降低以及良率降低。
技术问题
本申请提供一种有机发光二极管器件及其显示面板，一方面可以提升并置式有机发光二极管器件的电流效率和寿命，解决了蓝光寿命和效率的不足；另一方面可以避免层叠串联式有机发光二极管器件使用多道精密掩膜板(mask)制作多倍腔室的工艺，降低了生产成本，提升开口率，有利于提高整体良率。
技术解决方案
本申请实施例提供一种有机发光二极管器件，包括发光材料层，所述发光材料层包括第一共用蓝光发光层、发光单元层以及第二共用蓝光发光层；所述发光单元层设于所述第一共用蓝光发光层上，其包括并排设置的红色发光单元、绿色发光单元及蓝色发光单元；所述蓝色发光单元包括蓝色发光层以及与所述蓝色发光层上表面、下表面电性连接的电荷连接层；所述第二共用蓝光发光层，设于所述发光单元层上。
进一步地，所述红色发光单元、所述绿色发光单元、所述蓝色发光单元的厚度相等。
进一步地，所述电荷连接层与所述蓝色发光层对应设置，且所述电荷连接层与所述蓝色发光层的形状和尺寸相对应。
进一步地，所述电荷连接层的数量为一个，所述电荷连接层设于所述第一共用蓝光发光层和所述蓝色发光层之间，或者所述电荷连接层设于所述蓝色发光层和所述第二共用蓝光发光层之间。
进一步地，所述电荷连接层的数量为两个，一个所述电荷连接层设于所述第一共用蓝光发光层和所述蓝色发光层之间，另一个所述电荷连接层设于所述蓝色发光层和所述第二共用蓝光发光层之间。
进一步地，所述电荷连接层与的厚度范围为3nm-7nm。
进一步地，所述红色发光单元、所述绿色发光单元与所述蓝色发光单元均为量子点发光层。
进一步地，所述有机发光二极管器件还包括阳极层、空穴注入层、空穴传输层、电子传输层以及阴极层；所述空穴注入层设于所述阳极层上；所述空穴传输层设于所述空穴注入层上；所述发光材料层设于所述空穴传输层上；所述电子传输层设于所述发光材料层上；所述阴极层设于所述电子传输层上。
进一步地，所述第二共用蓝光发光层的主体材料为偏电子型的材料，其分子结构通式为：
Figure PCTCN2020111220-appb-000001
其中，R为氢或者为具有1至20个碳原子并选自于苯基衍生物、苯基衍生物、萘基衍生物和芳基衍生物的取代物，X为选自于萘基衍生物、苯基衍生物、苯基萘衍生物和苯基蒽衍生物单体，蓝光主体也可以包括蒽二萘、蒽二联苯、蒽萘联苯和蒽二苯的至少一个化合物。
进一步地，所述第二共用蓝光发光层的主体材料为偏电子型的材料，其分子结构通式为：
Figure PCTCN2020111220-appb-000002
其中，R1、R2、R3、R4、R5、R6均是氢原子、卤素原子、羟基、氰基、 硝基或包含具有20个碳原子以下的羰基的基团、包含羰基酯基团的基团、烷基、烯基、烷氧基、包含具有30个碳原子以下的甲硅烷基的基团、包含芳基的基团、包含杂环基的基团、包含氨基的基团或其衍生物。
进一步地，所述第二共用蓝光发光层的主体材料为偏电子型的材料，其分子结构为以下结构式中的任一种：
Figure PCTCN2020111220-appb-000003
进一步地，所述第一共用蓝光发光层的主体材料为偏空穴型的材料，其包括N,N'-二苯基-N,N'-(1-萘基)-1,1'-联苯-4,4'-二胺(NPB)或4,4′,4″-三(咔唑-9-基)三苯胺(TCTA)；所述第一共用蓝光发光层还包括蓝光荧光掺杂剂，所述蓝光荧光掺杂剂包括4,4'-二(2,2'-二苯乙烯基)-1,1'-联苯(DPVBi)、螺-DPVBi(spiro-DPVBi)、螺-6P(spiro-6P)中的任一种。
本申请还提供一种显示面板，包括上述任一项有机发光二极管器件。
有益效果
本申请的有益效果在于，提供一种有机发光二极管器件及显示面板，一方面通过第一共用蓝光发光层及第二共用蓝光发光层与蓝色发光单元相连可以提升并置式有机发光二极管器件的电流效率和寿命，解决蓝光寿命和效率的不足；另一方面相对于层叠串联式有机发光二极管器件减少了结构膜层数量，即减少了多倍腔室数量，避免了使用多道精密掩膜板(mask)制作多倍腔室的工 艺，降低了生产成本，提升开口率，有利于提高整体良率。
附图说明
图1为并置式有机发光二极管器件的结构示意图。
图2为层叠串联式有机发光二极管器件的结构示意图。
图3为本申请实施例中一种机发光二极管器件的结构示意图。
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
具体的，请参阅图3所示，本申请实施例提供一种有机发光二极管器件100，包括发光材料层4，所述发光材料层4包括第一共用蓝光发光层41、发光单元层42以及第二共用蓝光发光层43；所述发光单元层42设于所述第一共用蓝光发光层41上，其包括并排设置的红色发光单元421、绿色发光单元422及蓝色发光单元423；所述蓝色发光单元423为三层结构，包括蓝色发光 层以及与所述蓝色发光层4231上表面、下表面电性连接的电荷连接层4232；所述第二共用蓝光发光层43设于所述发光单元层42上。
本申请一方面提升了并置式有机发光二极管器件的电流效率和寿命，解决了蓝光寿命和效率的不足；另一方面通过减少结构膜层数量，即减少多倍腔室数量，可相对于层叠串联式有机发光二极管器件避免使用多道精密掩膜板(mask)制作多倍腔室的工艺，降低了生产成本，提升开口率，有利于提高整体良率。
本实施例中，所述红色发光单元421、所述绿色发光单元422、所述蓝色发光单元423的厚度相等，使得所述发光单元层42厚度均匀。
本实施例中，所述电荷连接层4232与所述蓝色发光层4231对应设置，且所述电荷连接层4232与所述蓝色发光层4231的形状和尺寸相对应。
如图3所示，本实施例中，所述电荷连接层4232的数量为两个，一个所述电荷连接层4232设于所述第一共用蓝光发光层41和所述蓝色发光层4231之间，另一个所述电荷连接层4232设于所述蓝色发光层4231和所述第二共用蓝光发光层43之间；亦即一个所述电荷连接层4232与所述蓝色发光层4231的上表面电性连接，另一个所述电荷连接层4232与所述蓝色发光层4231的下表面电性连接。
在其他实施例中，所述电荷连接层4232的数量也可只为一个，所述电荷连接层4232设于所述第一共用蓝光发光层41和所述蓝色发光层4231之间，或者所述电荷连接层设于所述蓝色发光层4231和所述第二共用蓝光发光层43之间；亦即所述电荷连接层4232与所述蓝色发光层4231的上表面电性连接或与所述蓝色发光层4231的下表面电性连接。
本实施例中，与所述蓝色发光层4231上表面、下表面电性连接的所述电荷连接层4232的厚度相同，均为3nm-7nm，优选为5nm；所述电荷连接层4232起到串联作用，可以通过调整所述电荷连接层4232的厚度值控制所述蓝色发光层4231的厚度。所述第一共用蓝光发光层41加上所述第二共用蓝光发光层43的厚度等于绿光光学补偿层厚度，约为30nm-40nm，可避免用于制作绿光光学补偿的一套掩膜板。
本实施例中，所述红色发光单元421、所述绿色发光单元422与所述蓝色 发光单元423均为量子点发光层，具有更好的发光效果。
本实施例中，所述有机发光二极管器件100还包括阳极层1、空穴注入层2、空穴传输层3、电子传输层5以及阴极层6；所述空穴注入层2设于所述阳极层1上；所述空穴传输层3设于所述空穴注入层2上；所述发光材料层4设于所述空穴传输层3上；所述电子传输层5设于所述发光材料层4上；所述阴极层6设于所述电子传输层5上。
本实施例中，所述第二共用蓝光发光层43的主体材料为偏电子型的材料，其分子结构通式为：
Figure PCTCN2020111220-appb-000004
其中，R为氢或者为具有1至20个碳原子并选自于苯基衍生物、苯基衍生物、萘基衍生物和芳基衍生物的取代物，X为选自于萘基衍生物、苯基衍生物、苯基萘衍生物和苯基蒽衍生物单体，蓝光主体也可以包括蒽二萘、蒽二联苯、蒽萘联苯和蒽二苯的至少一个化合物。
本实施例中，所述第二共用蓝光发光层43的主体材料为偏电子型的材料，其分子结构通式为：
Figure PCTCN2020111220-appb-000005
其中，R1、R2、R3、R4、R5、R6均是氢原子、卤素原子、羟基、氰基、硝基或包含具有20个碳原子以下的羰基的基团、包含羰基酯基团的基团、烷基、烯基、烷氧基、包含具有30个碳原子以下的甲硅烷基的基团、包含芳基的基团、包含杂环基的基团、包含氨基的基团或其衍生物。
本实施例中，所述第二共用蓝光发光层43的主体材料为偏电子型的材料， 其分子结构为以下结构式中的任一种：
Figure PCTCN2020111220-appb-000006
本实施例中，所述第一共用蓝光发光层41的主体材料为偏空穴型的材料，其包括N,N'-二苯基-N,N'-(1-萘基)-1,1'-联苯-4,4'-二胺(NPB)或4,4′,4″-三(咔唑-9-基)三苯胺(TCTA)；所述第一共用蓝光发光层41还包括蓝光荧光掺杂剂，所述蓝光荧光掺杂剂包括4,4'-二(2,2'-二苯乙烯基)-1,1'-联苯(DPVBi)、螺-DPVBi(spiro-DPVBi)、螺-6P(spiro-6P)中的任一种。
本实施例所述第二电荷连接层4232的主体材料为偏电子型的材料，并且所述第二电荷连接层4232的主体材料的最高占据轨道(Homo)能级小于红色发光单元421和绿色发光单元422的最高占据轨道(Homo)能级，对红色发光单元421、绿色发光单元422来说起到阻挡空穴的作用，所述第二电荷连接层4232的主体材料为偏空穴型的材料，红色发光单元421和绿色发光单元422的最高占据轨道(Homo)能级要小于所述第二电荷连接层4232的主体材料的最高占据轨道(Homo)能级。
本申请还提供一种显示面板，包括上述任一项有机发光二极管器件100。
本申请的有益效果在于，提供一种有机发光二极管器件100及显示面板，一方面提升了并置式有机发光二极管器件的电流效率和寿命，解决了蓝光寿命 和效率的不足；另一方面相对于层叠串联式有机发光二极管器件减少了结构膜层数量，即减少了多倍腔室数量，避免了使用多道精密掩膜板(mask)制作多倍腔室的工艺，降低了生产成本，提升开口率，有利于提高整体良率。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种有机发光二极管器件及显示面板进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (10)

  1. 一种有机发光二极管器件，其中，包括发光材料层，所述发光材料层包括：
    第一共用蓝光发光层；
    发光单元层，设于所述第一共用蓝光发光层上，其包括并排设置的红色发光单元、绿色发光单元及蓝色发光单元；所述蓝色发光单元包括层叠设置的蓝色发光层和电荷连接层；以及
    第二共用蓝光发光层，设于所述发光单元层上。
  2. 如权利要求1所述的有机发光二极管器件，其中，所述红色发光单元、所述绿色发光单元、所述蓝色发光单元的厚度相等。
  3. 如权利要求1所述的有机发光二极管器件，其中，所述电荷连接层与所述蓝色发光层对应设置，且所述电荷连接层与所述蓝色发光层的形状和尺寸相对应。
  4. 如权利要求3所述的有机发光二极管器件，其中，所述电荷连接层的数量为一个，所述电荷连接层设于所述第一共用蓝光发光层和所述蓝色发光层之间，或者所述电荷连接层设于所述蓝色发光层和所述第二共用蓝光发光层之间。
  5. 如权利要求3所述的有机发光二极管器件，其中，所述电荷连接层的数量为两个，一个所述电荷连接层设于所述第一共用蓝光发光层和所述蓝色发光层之间，另一个所述电荷连接层设于所述蓝色发光层和所述第二共用蓝光发光层之间。
  6. 如权利要求1所述的有机发光二极管器件，其中，所述电荷连接层的厚度范围为3nm-7nm。
  7. 如权利要求1所述的有机发光二极管器件，其中，还包括：
    阳极层；
    空穴注入层，设于所述阳极层上；
    空穴传输层，设于所述空穴注入层上；
    所述发光材料层，设于所述空穴传输层上；
    电子传输层，设于所述发光材料层上；以及
    阴极层，设于所述电子传输层上。
  8. 如权利要求1所述的有机发光二极管器件，其中，所述第二共用蓝光发光层的主体材料为偏电子型的材料，其分子结构通式为：
    Figure PCTCN2020111220-appb-100001
    其中，R为氢或者为具有1至20个碳原子并选自于苯基衍生物、苯基衍生物、萘基衍生物和芳基衍生物的取代物，X为选自于萘基衍生物、苯基衍生物、苯基萘衍生物和苯基蒽衍生物单体，蓝光主体也可以包括蒽二萘、蒽二联苯、蒽萘联苯和蒽二苯的至少一个化合物。
  9. 如权利要求1所述的有机发光二极管器件，其中，所述第二共用蓝光发光层的主体材料为偏电子型的材料，其分子结构通式为：
    Figure PCTCN2020111220-appb-100002
    其中，R1、R2、R3、R4、R5、R6均是氢原子、卤素原子、羟基、氰基、硝基或包含具有20个碳原子以下的羰基的基团、包含羰基酯基团的基团、烷基、烯基、烷氧基、包含具有30个碳原子以下的甲硅烷基的基团、包含芳基的基团、包含杂环基的基团、包含氨基的基团或其衍生物。
  10. 一种显示面板，包括权利要求1所述的有机发光二极管器件。
PCT/CN2020/111220 2020-07-06 2020-08-26 一种有机发光二极管器件及其显示面板 Ceased WO2022007141A1 (zh)

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