WO2021208272A1 - 有机发光二极管器件及其制作方法、显示装置 - Google Patents

有机发光二极管器件及其制作方法、显示装置 Download PDF

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Publication number
WO2021208272A1
WO2021208272A1 PCT/CN2020/100883 CN2020100883W WO2021208272A1 WO 2021208272 A1 WO2021208272 A1 WO 2021208272A1 CN 2020100883 W CN2020100883 W CN 2020100883W WO 2021208272 A1 WO2021208272 A1 WO 2021208272A1
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Prior art keywords
layer
emitting diode
light emitting
organic light
conductive nanoparticles
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PCT/CN2020/100883
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English (en)
French (fr)
Inventor
黄辉
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Tcl华星光电技术有限公司
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Priority to US16/970,637 priority Critical patent/US11394011B2/en
Publication of WO2021208272A1 publication Critical patent/WO2021208272A1/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
    • H10K50/80—Constructional details
    • 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
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • 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

Definitions

  • the present invention relates to the field of display technology, in particular to an organic light emitting diode device, a manufacturing method thereof, and a display device.
  • OLED organic light emitting diode
  • the existing organic light emitting diode device has the problem that the light emitting efficiency of the organic light emitting diode device is reduced due to the coupling reaction between the photons emitted from the light emitting layer and the free electrons of the cathode and the generation of surface plasmon waves. Therefore, it is necessary to provide an organic light emitting diode, a manufacturing method thereof, and a display device to improve this defect.
  • the embodiments of the present disclosure provide an organic light-emitting diode device, a manufacturing method thereof, and a display device, which are used to solve the existing organic light-emitting diode device due to the coupling reaction of photons emitted from the light-emitting layer with the free electrons of the cathode and generate surface plasmon
  • the elementary wave causes a problem that the luminous efficiency of the organic light emitting diode device is reduced.
  • the embodiments of the present disclosure provide an organic light emitting diode device, which includes an anode layer, a hole transport layer, a light emitting layer, an electron transport layer, a functional layer, and a cathode layer that are sequentially stacked;
  • the material of the functional layer includes an acidic metal sol, and the acidic metal sol contains metal conductive nanoparticles.
  • the metal conductive nanoparticles include one or more of Au conductive nanoparticles, Ag conductive nanoparticles, or Al conductive nanoparticles.
  • the organic light emitting diode device further includes a buffer layer having an organic material, and the buffer layer is disposed between the functional layer and the electron transport layer.
  • the material of the functional layer further includes an organic material.
  • the ratio of the acidic metal sol to the organic material of the functional layer is between 1:5 and 5:1.
  • the organic material of the functional layer includes epoxy resin.
  • the organic light emitting diode device further includes a hole injection layer and an electron injection layer, the hole injection layer is disposed between the hole transport layer and the anode layer, and the electron injection The layer is arranged between the functional layer and the electron transport layer.
  • the embodiments of the present disclosure also provide a display device, including a device main body and a display panel disposed on the device main body.
  • the display panel includes a thin film transistor array substrate and a plurality of organic light emitting devices disposed on the thin film transistor array substrate.
  • a diode device, the organic light emitting diode device comprising an anode layer, a hole transport layer, a light emitting layer, an electron transport layer, a functional layer, and a cathode layer that are stacked in sequence;
  • the material of the functional layer includes an acidic metal sol, and the acidic metal sol contains metal conductive nanoparticles.
  • the metal conductive nanoparticles include one or more of Au conductive nanoparticles, Ag conductive nanoparticles, or Al conductive nanoparticles.
  • the organic light emitting diode device further includes a buffer layer having an organic material, and the buffer layer is disposed between the functional layer and the electron transport layer.
  • the material of the functional layer further includes an organic material.
  • the ratio of the acidic metal sol to the organic material of the functional layer is between 1:5 and 5:1.
  • the organic material of the functional layer includes epoxy resin.
  • the organic light emitting diode device further includes a hole injection layer and an electron injection layer, the hole injection layer is disposed between the hole transport layer and the anode layer, and the electron injection The layer is arranged between the functional layer and the electron transport layer.
  • the embodiments of the present disclosure also provide a manufacturing method of an organic light emitting diode device, including:
  • a functional layer is prepared on the side of the electron transport layer away from the light-emitting layer, the material of the functional layer includes an acidic metal sol, and the acidic metal sol contains metal conductive nanoparticles;
  • a cathode layer is prepared on the side of the functional layer away from the electron transport layer.
  • the step of preparing the functional layer material includes:
  • the acid metal sol and the organic material are mixed according to a certain ratio to form the material of the functional layer.
  • the metal conductive nanoparticles include one or more of Au conductive nanoparticles, Ag conductive nanoparticles, or Al conductive nanoparticles.
  • the acidic solvent includes dilute nitric acid, acetic acid, dilute phosphoric acid or dilute hydrochloric acid.
  • the concentration of the acidic solvent is between 5% and 25%.
  • the ratio of the acid metal sol to the organic material is between 1:5 and 5:1.
  • the beneficial effects of the embodiments of the present disclosure add a functional layer between the cathode layer and the light-emitting layer.
  • the material of the functional layer includes acid metal sol.
  • the hydrogen ions in the acid metal sol can be attached to the metal in the acid metal sol.
  • the surface of the nano-conductive particles can be anchored with the cations on the surface of the cathode layer near the functional layer, thereby enhancing the adhesion between the functional layer and the cathode layer, preventing the separation and shedding of the film layer.
  • the direction of free electrons in the cathode layer will also change to avoid coupling reaction with photons to generate surface plasmon waves, thereby improving the light extraction efficiency of the organic light emitting diode.
  • FIG. 1 is a schematic structural diagram of an organic light emitting diode device provided by an embodiment of the disclosure
  • FIG. 2 is a schematic structural diagram of another light-emitting diode provided by an embodiment of the disclosure.
  • FIG. 3 is a schematic structural diagram of another light emitting diode provided by an embodiment of the disclosure.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the disclosure.
  • FIG. 5 is a schematic flowchart of a manufacturing method of an organic light emitting diode device provided by an embodiment of the disclosure.
  • 6A to 6C are structural schematic diagrams of an organic light emitting diode device corresponding to the manufacturing method provided by the embodiments of the disclosure.
  • FIG. 1 is a schematic structural diagram of an organic light emitting diode device 1 provided by an embodiment of the disclosure.
  • the organic light emitting diode device 1 includes an anode layer 11, a hole transport layer 12, a light emitting layer 13, and The electron transport layer 14, the buffer layer 15, the functional layer 16, and the cathode layer 17.
  • the material of the functional layer 16 is acid metal sol, and the acid metal sol contains metal conductive nanoparticles.
  • the hydrogen ions in the acid metal sol can be attached to the surface of the metal conductive nanoparticles in the acid metal sol, and the metal conductive nanoparticles to which the hydrogen ions are attached can interact with the cations on the surface of the cathode layer 17 close to the functional layer 16 Anchor to improve the adhesion between the cathode layer 17 and the functional layer 16, and strengthen the bonding between the cathode layer 17 and the functional layer 16, so as to prevent the separation and shedding of the film between the cathode layer 17 and the functional layer 16 Case.
  • the direction of free electrons in the cathode layer 17 will also change due to the presence of hydrogen ions, so as to prevent the free electrons in the cathode layer 17 from coupling reaction with the photons emitted from the light-emitting layer 13 and generate surface plasmon waves. Therefore, the light extraction efficiency of the organic light emitting diode device 1 is improved.
  • the metal conductive nanoparticles are Au conductive nanoparticles.
  • the acidic metal sol containing Au conductive nanoparticles can form tiny uneven nanostructures on the surface of the functional layer 16 after drying and curing.
  • the nanostructures have a scattering effect on light and can change the direction of photons emitted by the light-emitting layer 13 to make it
  • the binding ability of free electrons with the surface of the cathode layer 17 close to the functional layer 16 is reduced, which further prevents the free electrons in the cathode layer 17 from coupling with the photons emitted from the light-emitting layer 13 and generates surface plasmon waves, thereby improving organic light emission
  • the metal conductive nanoparticles can also be Ag conductive nanoparticles or Al conductive nanoparticles, in addition, they can also be conductive nanoparticles such as Au conductive nanoparticles, Ag conductive nanoparticles, and Al conductive nanoparticles.
  • conductive nanoparticles such as Au conductive nanoparticles, Ag conductive nanoparticles, and Al conductive nanoparticles.
  • the material of the buffer layer 15 is an organic material.
  • the buffer layer 15 made of organic material By placing the buffer layer 15 made of organic material between the electron transport layer 14 and the functional layer 16, it is used to protect the electron transport layer 14 and the light emitting layer 13, avoiding the electron transport layer 14 and the light emitting layer 13. It is destroyed during the process of forming the functional layer 16 and the cathode layer 17.
  • the organic material is epoxy resin, which utilizes the good adhesion, mechanical properties and stability of the epoxy resin material to protect the electron transport layer 14 and the light-emitting layer 13 while preventing the function The layer 16 and the electron transport layer 14 are separated and fall off.
  • the organic material may also be other materials with the same or similar properties as epoxy resin, which is not limited here.
  • the film thickness of the buffer layer 15 is 30 nm
  • the film thickness of the functional layer 16 is 20 nm
  • the film thickness of the cathode layer 17 can be compared with the original film thickness.
  • Appropriate reduction so that the total film thickness of the buffer layer 15 and the functional layer 16 and the cathode layer 17 can be the same as that of the original cathode layer, so as to ensure that the cavity length of the organic light emitting diode device 1 remains unchanged, so that the light is emitted.
  • the light emitted by the layer 13 can be superimposed in the organic light emitting diode device 1 through the characteristics of light and the light intensity can be enhanced.
  • the film thicknesses of the buffer layer 15, the functional layer 16, and the cathode layer 17 are not limited to the film thicknesses provided in the above embodiments.
  • the film thickness of the buffer layer 15 is between 10-50 nm.
  • the film thickness of the functional layer 16 is between 5 ⁇ 30nm, and the film thickness of the cathode layer 17 is between 20 ⁇ 100nm, which can meet the requirement of keeping the cavity length unchanged, and realize the enlargement of the organic light emitting diode device 1 The effect of light penetration efficiency.
  • the material of the cathode layer 17 may be metal or metal oxide.
  • the material of the cathode layer 17 is a metal oxide, such as a metal oxide such as ZnO or IZO.
  • the material of the cathode layer 17 may also be a metal material or a laminated structure formed by a metal material, which is not limited here.
  • a functional layer and a buffer layer are added between the cathode layer and the light-emitting layer.
  • the material of the functional layer includes acid metal sol.
  • the hydrogen ions in the acid metal sol can be attached to the acid metal sol.
  • the surface of the metal nano conductive particles in the cathode layer can be anchored with the cations on the surface of the cathode layer close to the functional layer, thereby enhancing the adhesion between the functional layer and the cathode layer, and preventing the separation and shedding of the film layer.
  • the direction of free electrons in the cathode layer will also change to avoid coupling reaction with photons to produce surface plasmon waves, thereby improving the light extraction efficiency of organic light-emitting diode devices. It is arranged between the electron transport layer and the functional layer to protect the film layers such as the electron transport layer and the light emitting layer, and prevent the film layers such as the electron transport layer and the light emitting layer from being damaged during the process of forming the functional layer and the cathode layer.
  • FIG. 2 is a schematic structural diagram of an organic light emitting diode device 2 provided by an embodiment of the disclosure.
  • the organic light emitting diode device 2 includes an anode layer 21, a hole transport layer 22, a light emitting layer 23, The electron transport layer 24, the functional layer 25, and the cathode layer 26.
  • the material of the functional layer 25 includes acidic metal sol, and the acidic metal sol contains metal conductive nanoparticles.
  • the hydrogen ions in the acid metal sol can be attached to the surface of the metal conductive nanoparticles in the acid metal sol, and the metal conductive nanoparticles to which the hydrogen ions are attached can interact with the cations on the surface of the cathode layer 26 close to the functional layer 25.
  • Anchor thereby improving the adhesion between the cathode layer 26 and the functional layer 25, and strengthening the bonding of the connecting surface of the cathode layer 26 and the functional layer 25, so as to prevent the separation and shedding of the film between the cathode layer 26 and the functional layer 25 Case.
  • the direction of free electrons in the cathode layer 26 will also change due to the presence of hydrogen ions, so as to prevent the free electrons in the cathode layer 26 from coupling reaction with the photons emitted from the light-emitting layer 23 and generate surface plasmon waves. , Thereby improving the light extraction efficiency of the organic light emitting diode device 2.
  • the material of the functional layer 25 further includes an organic material, and the organic material is mixed with the acidic metal sol according to a certain ratio to form the material of the functional layer 25.
  • the addition of organic materials in the functional layer 25 can facilitate the solidification of the acidic metal sol to form the thin film of the functional layer 25, and can also ensure the flatness of the surface of the formed functional layer 25 near the cathode layer 26, and prevent the acidic metal sol
  • the uneven nanostructure formed by the metal conductive nanoparticles in the solidification reduces the bonding strength between the functional layer 25 and the cathode layer 26, and prevents the separation and shedding of the film between the cathode layer 26 and the functional layer 25.
  • the electron transport layer 24 and the light-emitting layer 23 under the functional layer 25 can be prevented from being damaged during the process of forming the cathode layer 26.
  • the metal conductive nanoparticles are Au conductive nanoparticles.
  • the metal conductive nanoparticles can also be Ag conductive nanoparticles or Al conductive nanoparticles, in addition, they can also be two or more of conductive nanoparticles such as Au, Ag, and Al.
  • the mixing of nanoparticles can also achieve the same technical effects as the embodiments of the present disclosure, and can be selected according to actual needs, and there is no limitation here.
  • the organic material of the functional layer 25 is epoxy resin, so that the good adhesion, mechanical properties and stability of the epoxy resin material are used to protect the electron transport layer 24 and the luminescence.
  • the film layer such as the layer 23, it is possible to prevent the functional layer 25 and the electron transport layer 24 from separating, falling off, or protruding the film.
  • the organic material may also be other materials with the same or similar properties as epoxy resin, which is not limited here.
  • the ratio of acidic metal sol to organic material in the material of the functional layer 25 is 3:3, so as to ensure the flatness of the surface of the functional layer 25 close to the cathode layer 26 As well as the adhesion between the adjacent film layers, it can also make the metal conductive nanoparticles uniformly dispersed in the functional layer 25 to ensure the functionality of the acid metal sol.
  • the ratio of the acid metal sol to the organic material is not limited to the 3:3 provided in the embodiment of the present disclosure.
  • the ratio of the acid metal sol to the organic material only needs to be between 1:5 to 5:1. Among them, the same or similar technical effects as the above-mentioned embodiments can be obtained, and the specific ratio can be selected according to actual needs, and there is no limitation here.
  • the film thickness of the functional layer 25 is 50 nm, and the film thickness of the cathode layer 26 can be appropriately reduced compared with the original film thickness, so that the functional layer 25 and the cathode layer 26 can be
  • the total film thickness is the same as the film thickness of the original cathode layer, and the cavity length of the organic light emitting diode device 2 can be kept unchanged while maintaining the conductivity of the cathode layer 26 itself and avoiding the influence of electron injection. , So that the light emitted by the light-emitting layer 23 can be superimposed in the organic light-emitting diode device 2 through the characteristics of light and the light intensity is enhanced.
  • the film thickness of the functional layer 25 and the cathode layer 26 is not limited to the film thickness provided in the above embodiments. In some other embodiments, the film thickness of the functional layer 16 is between 10 and 100 nm. The film thickness of the layer 26 is between 20 and 100 nm, which can satisfy the effect of increasing the light penetration efficiency of the organic light emitting diode device 2 under the condition that the cavity length remains unchanged.
  • FIG. 3 is a schematic diagram of another structure of an organic light emitting diode device provided by an embodiment of the disclosure.
  • the organic light emitting diode device 2 may further include a hole injection layer 27 and an electron injection layer 28 as shown in FIG. 3, and the hole injection layer 27 is disposed between the hole transport layer 22 and the anode layer 21. Meanwhile, the electron injection layer 28 is disposed between the functional layer 25 and the electron transport layer 24.
  • the light-emitting diode device 2 may also include other film layers with auxiliary functions in addition to the hole injection layer 27 and the electron injection layer 28, which can be set according to actual needs, which is not done here. limit.
  • the beneficial effects of the embodiments of the present disclosure add a functional layer between the cathode layer and the light-emitting layer.
  • the material of the functional layer includes acidic metal sol and organic materials.
  • the hydrogen ions in the acidic metal sol can be attached to the acidic metal sol.
  • the surface of the metal nano-conductive particles in the cathode layer can be anchored with the cations on the surface of the cathode layer close to the functional layer, thereby enhancing the adhesion between the functional layer and the cathode layer, and preventing the separation and shedding of the film layer.
  • the direction of free electrons in the cathode layer will also change to avoid coupling reaction with photons to produce surface plasmon waves, thereby improving the light extraction efficiency of the organic light-emitting diode device.
  • the organic material can ensure that the functional layer is close to the The flatness of the surface of one side of the cathode layer prevents the uneven nanostructures formed after the metal conductive nanoparticles in the acid metal sol are solidified.
  • the separation and shedding of the interlayer film can also prevent the electron transport layer and the light-emitting layer under the functional layer from being damaged during the process of forming the cathode layer.
  • the embodiment of the present disclosure also provides a display device, which will be described in detail below with reference to FIG. 4.
  • 4 is a schematic structural diagram of a display device 3 provided by an embodiment of the disclosure.
  • the display device 3 includes a device main body 31 and a display panel 32 disposed on the device main body 31.
  • the display panel 32 includes a thin film transistor array substrate 321 and a plurality of organic light emitting diode devices 322 disposed on the thin film transistor array substrate 321, and the organic light emitting diode devices 322 are the organic light emitting diode devices provided in the above-mentioned embodiments.
  • the display device 3 provided by the embodiment of the present disclosure can also achieve the same technical effect as the organic light emitting diode device provided by the above-mentioned embodiment, which will not be repeated here.
  • the embodiment of the present disclosure also provides a manufacturing method of an organic light-emitting diode device, which will be described in detail below with reference to FIGS. 5 to 6, wherein FIG. 5 is a schematic flow chart of the manufacturing method of the organic light-emitting diode device provided by the embodiment of the disclosure.
  • FIGS. 5 to 6 are schematic flow chart of the manufacturing method of the organic light-emitting diode device provided by the embodiment of the disclosure.
  • 6A to 6C are structural schematic diagrams of the organic light emitting diode device corresponding to the manufacturing method provided by the embodiments of the disclosure.
  • Step S1 As shown in FIG. 6A, a substrate 20 is provided, and an anode layer 21, a hole transport layer 22, a light emitting layer 23, and an electron transport layer 24 are sequentially prepared on the substrate 20;
  • Step S2 As shown in FIG. 6B, a functional layer 25 is prepared on the side of the electron transport layer 24 away from the light-emitting layer 23.
  • the material of the functional layer includes acid metal sol, and the acid metal sol contains metal. Conductive nanoparticles; and
  • Step S3 As shown in FIG. 6C, a cathode layer 26 is prepared on the side of the functional layer 25 away from the electron transport layer.
  • the process of forming and forming the anode layer 21, the hole transport layer 22, the light emitting layer 23 and the electron transport layer 24 in the step S1 can adopt the process of preparing the above-mentioned film layers in the prior art. , There is no restriction here.
  • the method of placing the material of the functional layer 25 on the electron transport layer 24 away from the light-emitting layer 23 to prepare the functional layer 25 includes coating, spin coating or inkjet printing.
  • the material of the functional layer 25 is directly printed on the surface of the electron transport layer 24 by means of inkjet printing.
  • the step of forming the material of the functional layer includes:
  • Step S201 Place the metal conductive nanoparticles in an acidic solution and soak for 12-24 hours;
  • Step S202 filtering the soaked metal conductive nanoparticles, and performing drying treatment at a temperature of 80 to 120°C;
  • Step S203 configuring the dried metal conductive nanoparticles into an acid metal sol.
  • Step S204 mixing the acidic metal sol and the organic material according to a certain ratio to form the material of the functional layer.
  • the metal conductive nanoparticles are Au conductive nanoparticles.
  • the metal conductive nanoparticles can also be Ag conductive nanoparticles or Al conductive nanoparticles, in addition, they can also be conductive nanoparticles such as Au conductive nanoparticles, Ag conductive nanoparticles, and Al conductive nanoparticles.
  • the mixing of two or more kinds of conductive nanoparticles in the particles can also obtain the same technical effects as the embodiments of the present disclosure, which can be selected according to actual needs, and there is no limitation here.
  • the acidic solution used to soak the metal conductive nanoparticles may be a weakly acidic solution such as dilute nitric acid, acetic acid, dilute phosphoric acid, or dilute hydrochloric acid.
  • the acidic solution is dilute hydrochloric acid with a concentration of 5-25%.
  • the acidic solution may also be dilute nitric acid, acetic acid, or dilute phosphoric acid, etc., which is not limited here.
  • the temperature for drying the metal conductive nanoparticles soaked in the acid solution should be 100°C.
  • the solvent system for configuring the metal conductive nanoparticles into the acidic metal sol is an organic polymer, such as a mixture of systems such as toluene and benzene, or a single solvent composition.
  • the ratio of the acidic metal sol to the organic material is 3:3, so as to ensure the flatness of the surface of the functional layer 25 close to the cathode layer 26 and the distance between the functional layer 25 and the adjacent film layer. Adhesiveness can also make the metal conductive nanoparticles uniformly dispersed in the functional layer 25 to ensure the functionality of the acid metal sol.
  • the ratio of the acid metal sol to the organic material is not limited to the 3:3 provided in the embodiment of the present disclosure. In some other embodiments, the ratio of the acid metal sol to the organic material only needs to be between 1:5 to 5:1. Among them, the same or similar technical effects as the above-mentioned embodiments can be obtained, and the specific ratio can be selected according to actual needs, and there is no limitation here.
  • the manufacturing method provided by the embodiments of the present disclosure adds a functional layer between the cathode layer and the light-emitting layer.
  • the material of the functional layer includes acidic metal sol and organic material. Hydrogen ions in the acidic metal sol can adhere The surface of the metal nano conductive particles in the acid metal sol can be anchored with the cations on the surface of the cathode layer close to the functional layer, thereby enhancing the adhesion between the functional layer and the cathode layer and preventing the separation of the film , Falling off occurs, in addition, the direction of free electrons in the cathode layer will also change, to avoid coupling reaction with photons to produce surface plasmon waves, thereby improving the light extraction efficiency of organic light-emitting diode devices, organic materials can ensure The flatness of the surface of the functional layer near the cathode layer prevents the uneven nanostructures formed after the metal conductive nanoparticles in the acid metal sol are solidified, reducing the bonding strength

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Abstract

本揭示提供一种有机发光二极管器件及其制作方法、显示装置，有机发光二极管器件包括功能层和阴极层，功能层的材料包括酸性金属溶胶，酸性金属溶胶中的氢离子可以附着在金属纳米导电颗粒表面，并与阴极层表面的阳离子锚定，增强膜层的粘附性，阴极层中自由电子的方向发生改变，避免与光子发生耦合反应，从而提高出光效率。

Description

有机发光二极管器件及其制作方法、显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种有机发光二极管器件及其制作方法、显示装置。
 背景技术
现有有机发光二极管（organic light emitting diode, OLED）器件内部存在光损失，导致大部分的光都无法有效出射到有机发光二极管器件外部，而主要大部分的损失在于从发光层出射的光子与阴极的自由电子发生耦合反应并产生表面等离激元波，使得这部分的光无法到达有机发光二极管器件外部，导致有机发光二极管器件整体的发光效率下降。
 技术问题
目前大部分的改善方法都是通过增加发光层与阴极之间的距离，使两者之间的影响降低，从而改善发光效率。但是仅仅增加发光层与阴极之间的距离会造成有机发光二极管器件内部膜层缺陷的增加、有机发光二极管器件特定的腔长发生变化，反而会使有机发光二极管器件内部产生膜层分离、脱落的情况，并使得有机发光二极管器件内部的光线被减弱，导致有机发光二极管器件的出光效率降低。
综上所述，现有有机发光二极管器件存在由于发光层出射的光子与阴极的自由电子发生耦合反应并产生表面等离激元波导致有机发光二极管器件的发光效率降低的问题。故，有必要提供一种有机发光二极管及其制作方法、显示装置来改善这一缺陷。
 技术解决方案
本揭示实施例提供一种有机发光二极管器件及其制作方法、显示装置，用于解决现有有机发光二极管器件存在的由于发光层出射的光子与阴极的自由电子发生耦合反应并产生表面等离激元波导致有机发光二极管器件的发光效率降低的问题。
本揭示实施例提供一种有机发光二极管器件，包括依次层叠设置的阳极层、空穴传输层、发光层、电子传输层、功能层和阴极层；
其中，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。
根据本揭示一实施例，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
根据本揭示一实施例，所述有机发光二极管器件还包括具有有机材料的缓冲层，所述缓冲层设置于所述功能层与所述电子传输层之间。
根据本揭示一实施例，所述功能层的材料还包括有机材料。
根据本揭示一实施例，所述酸性金属溶胶与所述功能层的所述有机材料的配比介于1:5~5:1之间。
根据本揭示一实施例，所述功能层的所述有机材料包括环氧树脂。
根据本揭示一实施例，所述有机发光二极管器件还包括空穴注入层和电子注入层，所述空穴注入层设置于所述空穴传输层与所述阳极层之间，所述电子注入层设置于所述功能层与所述电子传输层之间。
本揭示实施例还提供一种显示装置，包括装置主体和设置于所述装置主体上的显示面板，所述显示面板包括薄膜晶体管阵列基板和设置于所述薄膜晶体管阵列基板上的多个有机发光二极管器件，所述有机发光二极管器件包括依次层叠设置的阳极层、空穴传输层、发光层、电子传输层、功能层和阴极层；
其中，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。
根据本揭示一实施例，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
根据本揭示一实施例，所述有机发光二极管器件还包括具有有机材料的缓冲层，所述缓冲层设置于所述功能层与所述电子传输层之间。
根据本揭示一实施例，所述功能层的材料还包括有机材料。
根据本揭示一实施例，所述酸性金属溶胶与所述功能层的所述有机材料的配比介于1:5~5:1之间。
根据本揭示一实施例，所述功能层的所述有机材料包括环氧树脂。
根据本揭示一实施例，所述有机发光二极管器件还包括空穴注入层和电子注入层，所述空穴注入层设置于所述空穴传输层与所述阳极层之间，所述电子注入层设置于所述功能层与所述电子传输层之间。
本揭示实施例还提供一种有机发光二极管器件的制作方法，包括：
提供衬底，在所述衬底上依次形成阳极层、空穴传输层、发光层和电子传输层；
在所述电子传输层远离所述发光层的一侧上制备功能层，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒；以及
在所述功能层远离所述电子传输层的一侧上制备阴极层。
根据本揭示一实施例，制备所述功能层材料的步骤包括：
将金属导电纳米颗粒放置于酸性溶剂中浸泡12~24小时；
将经过浸泡的所述金属导电纳米颗粒过滤，并在80~120℃的温度下进行干燥处理；
将干燥处理后的所述金属导电纳米颗粒配置成酸性金属溶胶；以及
将所述酸性金属溶胶与有机材料按照一定的配比混合形成所述功能层的材料。
根据本揭示一实施例，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
根据本揭示一实施例，所述酸性溶剂包括稀硝酸、醋酸、稀磷酸或者稀盐酸。
根据本揭示一实施例，所述酸性溶剂的浓度介于5%~25%之间。
根据本揭示一实施例，所述酸性金属溶胶与所述有机材料的配比介于1:5~5:1之间。
 有益效果
本揭示实施例的有益效果：本揭示实施例通过在阴极层与发光层之间增设功能层，功能层的材料包括酸性金属溶胶，酸性金属溶胶中的氢离子可以附着在酸性金属溶胶中的金属纳米导电颗粒的表面，以此可以与阴极层中靠近功能层一侧表面的阳离子进行锚定，从而增强功能层与阴极层之间的粘附性，防止膜层分离、脱落的情况发生，此外阴极层中的自由电子的方向也会发生改变，避免与光子发生耦合反应产生表面等离激元波，从而提高有机发光二极管的出光效率。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是揭示的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本揭示实施例提供的有机发光二极管器件的结构示意图；
图2为本揭示实施例提供的另一种发光二极管的结构示意图；
图3为本揭示实施例提供的另一种发光二极管的结构示意图；
图4为本揭示实施例提供的显示装置的结构示意图；
图5为本揭示实施例提供的有机发光二极管器件的制作方法的流程示意图；以及
图6A~图6C为本揭示实施例提供的与制作方法对应的有机发光二极管器件的结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本揭示可用以实施的特定实施例。本揭示所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本揭示，而非用以限制本揭示。在图中，结构相似的单元是用以相同标号表示。
下面结合附图和具体实施例对本揭示做进一步的说明：
本揭示实施例提供一种有机发光二极管器件1，下面结合图1进行详细说明。如图1所示，图1为本揭示实施例提供的有机发光二极管器件1的结构示意图，所述有机发光二极管器件1包括依次层叠设置的阳极层11、空穴传输层12、发光层13、电子传输层14、缓冲层15、功能层16和阴极层17。
在本揭示实施例中，所述功能层16的材料为酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。所述酸性金属溶胶内的氢离子可以附着在酸性金属溶胶内的金属导电纳米颗粒的表面，附着有氢离子的金属导电纳米颗粒可以与阴极层17靠近所述功能层16一侧表面的阳离子进行锚定，从而提高阴极层17与功能层16之间的粘附性，加强阴极层17与功能层16连接面的结合，以此防止阴极层17与功能层16之间发生膜层分离、脱落的情况。此外，阴极层17内的自由电子的方向也会由于氢离子的存在而发生改变，以此避免阴极层17内的自由电子与发光层13出射的光子发生耦合反应并产生表面等离激元波，从而提高有机发光二极管器件1的出光效率。
具体地，在本揭示实施例中，所述金属导电纳米颗粒为Au导电纳米颗粒。含有Au导电纳米颗粒的酸性金属溶胶在干燥固化后，可以使功能层16表面形成微小的凹凸不平的纳米结构，纳米结构对于光线具有散射作用，可以改变发光层13发出的光子的方向，使其与阴极层17靠近功能层16一侧表面的自由电子结合能力下降，进一步避免阴极层17内的自由电子与发光层13出射的光子发生耦合反应并产生表面等离激元波，从而提高有机发光二极管器件1的出光效率。
当然，在一些实施例中，所述金属导电纳米颗粒也可以为Ag导电纳米颗粒或者为Al导电纳米颗粒，此外，还可以为Au导电纳米颗粒、Ag导电纳米颗粒和Al导电纳米颗粒等导电纳米颗粒中的两种或者多种导电纳米颗粒的混合，其同样可以获得与本揭示实施例相同的技术效果，可以根据实际需求进行选择，此处不做限制。
具体地，在本揭示实施例中，所述缓冲层15的材料为有机材料。通过将材料为有机材料的缓冲层15设置于电子传输层14与功能层16之间，用于保护电子传输层14和发光层13等膜层，避免电子传输层14和发光层13等膜层在形成所述功能层16和阴极层17的制程中被破坏。
优选的，所述有机材料为环氧树脂，以此利用环氧树脂材料良好的粘附性能、力学性能以及稳定性，在保护电子传输层14和发光层13等膜层的同时，可以防止功能层16与电子传输层14发生膜层分离、脱落的情况。当然在一些实施例中，所述有机材料还可以为其他性质与环氧树脂相同或者类似的材料，此处不做限制。
具体地，在本揭示实施例中，所述缓冲层15的膜层厚度为30nm，所述功能层16的膜层厚度为20nm，阴极层17的膜层厚度相较于原有膜层厚度可以适当减少，这样可以让缓冲层15与功能层16以及阴极层17的总膜层厚度与原有阴极层的膜层厚度相同，以此保证有机发光二极管器件1的腔长保持不变，使得发光层13发出的光线可以通过光的特性在有机发光二极管器件1内进行叠加并增强光线强度。
当然，缓冲层15、功能层16以及阴极层17的膜层厚度并不仅限于上述实施例所提供的膜层厚度，在一些实施例中，缓冲层15的膜层厚度介于10~50nm之间，功能层16的膜层厚度介于5~30nm之间，阴极层17的膜层厚度介于20~100nm之间，即可满足保证腔长不变的条件下，实现增大有机发光二极管器件1光线穿透效率的效果。
可选的，本揭示实施例中，所述阴极层17的材料可以为金属或金属氧化物。优选的，所述阴极层17的材料为金属氧化物，如ZnO或者IZO等金属氧化物。当然，在一些实施例中，所述阴极层17的材料也可以为金属材料或者金属材料所形成的叠层结构，此处不做限制。
本揭示实施例的有益效果：本揭示实施例通过在阴极层与发光层之间增设功能层以及缓冲层，功能层的材料包括酸性金属溶胶，酸性金属溶胶中的氢离子可以附着在酸性金属溶胶中的金属纳米导电颗粒的表面，以此可以与阴极层中靠近功能层一侧表面的阳离子进行锚定，从而增强功能层与阴极层之间的粘附性，防止膜层分离、脱落的情况发生，此外阴极层中的自由电子的方向也会发生改变，避免与光子发生耦合反应产生表面等离激元波，从而提高有机发光二极管器件的出光效率，同时通过将材料为有机材料的缓冲层设置于电子传输层与功能层之间，用于保护电子传输层和发光层等膜层，避免电子传输层和发光层等膜层在形成所述功能层和阴极层的制程中被破坏。
本揭示实施例还提供另一种有机发光二极管器件2，下面结合图2和图3进行详细说明。如图2所示，图2为本揭示实施例提供的有机发光二极管器件2的结构示意图，所述有机发光二极管器件2包括依次层叠设置的阳极层21、空穴传输层22、发光层23、电子传输层24、功能层25和阴极层26。
在本揭示实施例中，所述功能层25的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。所述酸性金属溶胶内的氢离子可以附着在酸性金属溶胶内的金属导电纳米颗粒的表面，附着有氢离子的金属导电纳米颗粒可以与阴极层26靠近所述功能层25一侧表面的阳离子进行锚定，从而提高阴极层26与功能层25之间的粘附性，加强阴极层26与功能层25连接面的结合，以此防止阴极层26与功能层25之间发生膜层分离、脱落的情况。此外，阴极层26内的自由电子的方向也会由于氢离子的存在而发生改变，以此避免阴极层26内的自由电子与发光层23出射的光子发生耦合反应并产生表面等离激元波，从而提高有机发光二极管器件2的出光效率。
在本揭示实施例中，所述功能层25的材料还包括有机材料，所述有机材料与酸性金属溶胶按照一定的配比混合形成所述功能层25的材料。在功能层25内添加有机材料可以有利于酸性金属溶胶固化形成所述功能层25的薄膜，还可以保证所形成的功能层25靠近所述阴极层26一侧表面的平整度，防止酸性金属溶胶中的金属导电纳米颗粒固化后所形成的凹凸不平的纳米结构减小功能层25与阴极层26之间的黏结强度，避免阴极层26与功能层25之间膜层分离、脱落的情况发生，此外还可以避免位于功能层25下的电子传输层24和发光层23等膜层在形成所述阴极层26的制程中被破坏。
具体地，在本揭示实施例中，所述金属导电纳米颗粒为Au导电纳米颗粒。当然，在一些实施例中，所述金属导电纳米颗粒也可以为Ag导电纳米颗粒或者为Al导电纳米颗粒，此外，还可以为Au、Ag和Al等导电纳米颗粒中的两种或者多种导电纳米颗粒的混合，其同样可以获得与本揭示实施例相同的技术效果，可以根据实际需求进行选择，此处不做限制。
具体地，在本揭示实施例中，所述功能层25的有机材料为环氧树脂，以此利用环氧树脂材料良好的粘附性能、力学性能以及稳定性，在保护电子传输层24和发光层23等膜层的同时，可以防止功能层25与电子传输层24发生膜层分离、脱落或者膜层突起的情况。当然，在一些实施例中，所述有机材料还可以为其他性质与环氧树脂相同或者类似的材料，此处不做限制。
具体地，在本揭示实施例中，所述功能层25的材料中酸性金属溶胶与有机材料的配比为3:3，以此既可以保证功能层25靠近阴极层26一侧表面的平整性以及与相邻膜层之间的粘附性，同时还可以使得金属导电纳米颗粒在功能层25中均匀分散，保证酸性金属溶胶的功能性。当然，酸性金属溶胶与有机材料的配比不仅限于本揭示实施例所提供的3:3，在其他一些实施例中，酸性金属溶胶与有机材料的配比只要介于1:5~5:1之间，均可以获得与上述实施例相同或者相似的技术效果，具体配比可以根据实际需求进行选择，此处不做限制。
具体地，在本揭示实施例中，功能层25的膜层厚度为50nm，阴极层26的膜层厚度相较于原有膜层厚度可以适当减少，这样可以让功能层25与阴极层26的总膜层厚度与原有阴极层的膜层厚度相同，并且可以在保持阴极层26本身的导电性以及避免电子注入的影响的前提下，以此保证有机发光二极管器件2的腔长保持不变，使得发光层23发出的光线可以通过光的特性在有机发光二极管器件2内进行叠加并增强光线强度。
当然，功能层25以及阴极层26的膜层厚度并不仅限于上述实施例所提供的膜层厚度，在其他的一些实施例中，功能层16的膜层厚度介于10~100nm之间，阴极层26的膜层厚度介于20~100nm之间，即可满足保证腔长不变的条件下，实现增大有机发光二极管器件2光线穿透效率的效果。
如图3所示，图3为本揭示实施例提供的有机发光二极管器件的另一种结构示意图。在一些实施例中，有机发光二极管器件2还可以包括如图3所示的空穴注入层27和电子注入层28，所述空穴注入层27设置于空穴传输层22与阳极层21之间，所述电子注入层28设置于功能层25与所述电子传输层24之间。当然，在另一些实施例中，发光二级管器件2还可以包括除空穴注入层27和电子注入层28之外其他具有辅助功能的膜层，可以根据实际需求进行设置，此处不做限制。
本揭示实施例的有益效果：本揭示实施例通过在阴极层与发光层之间增设功能层，功能层的材料包括酸性金属溶胶和有机材料，酸性金属溶胶中的氢离子可以附着在酸性金属溶胶中的金属纳米导电颗粒的表面，以此可以与阴极层中靠近功能层一侧表面的阳离子进行锚定，从而增强功能层与阴极层之间的粘附性，防止膜层分离、脱落的情况发生，此外阴极层中的自由电子的方向也会发生改变，避免与光子发生耦合反应产生表面等离激元波，从而提高有机发光二极管器件的出光效率，有机材料则可以保证的功能层靠近所述阴极层一侧表面的平整度，防止酸性金属溶胶中的金属导电纳米颗粒固化后所形成的凹凸不平的纳米结构减小功能层与阴极层之间的黏结强度，避免阴极层与功能层之间膜层分离、脱落的情况发生，同时还可以避免位于功能层下的电子传输层和发光层等膜层在形成阴极层的制程中被破坏。
本揭示实施例还提供一种显示装置，下面结合图4进行详细说明。图4为本揭示实施例所提供的显示装置3的结构示意图，所述显示装置3包括装置主体31和设置于所述装置主体31上的显示面板32，所述显示面板32包括薄膜晶体管阵列基板321和设置于薄膜晶体管阵列基板321上的多个有机发光二极管器件322，所述有机发光二极管器件322为上述实施例所提供的有机发光二极管器件。本揭示实施例所提供的显示装置3同样能够实现与上述实施例所提供的有机发光二极管器件相同的技术效果，此处不再赘述。
本揭示实施例还提供一种有机发光二极管器件的制作方法，下面结合图5至图6进行详细说明，其中图5为本揭示实施例所提供的有机发光二极管器件的制作方法的流程示意图，图6A至图6C为本揭示实施例所提供的与制作方法对应的有机发光二极管器件的结构示意图。
本揭示实施例所提供的有机发光二极管器件的制作方法包括：
步骤S1：如图6A所示，提供衬底20，在所述衬底20上依次制备阳极层21、空穴传输层22、发光层23和电子传输层24；
步骤S2：如图6B所示，在所述电子传输层24远离所述发光层23的一侧上制备功能层25，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒；以及
步骤S3：如图6C所示，在所述功能层25远离所述电子传输层的一侧上制备阴极层26。
在本揭示实施例中，所述步骤S1中形成制备形成所述阳极层21、空穴传输层22、发光层23和电子传输层24的制程可以采用现有技术中制备上述各膜层的制程，此处不做限制。
所述步骤S2中，将所述功能层25的材料置于电子传输层24远离发光层23上以制备功能层25的方法包括涂布、旋涂或者喷墨打印的方式。优选的，所述步骤S2中，采用喷墨打印的方式将功能层25的材料直接打印于电子传输层24的表面上。
具体地，所述步骤S2中，形成所述功能层的材料的步骤包括：
步骤S201：将金属导电纳米颗粒放置于酸性溶液中浸泡12~24小时；
步骤S202：将经过浸泡的所述金属导电纳米颗粒过滤，并在80~120℃的温度下进行干燥处理；
步骤S203：将干燥处理后的所述金属导电纳米颗粒配置成酸性金属溶胶；以及
步骤S204：将所述酸性金属溶胶与有机材料按照一定的配比混合形成所述功能层的材料。
进一步的，所述步骤S201中，所述金属导电纳米颗粒为Au导电纳米颗粒。当然，在一些实施例中，所述金属导电纳米颗粒也可以为Ag导电纳米颗粒或者为Al导电纳米颗粒，此外，还可以为Au导电纳米颗粒、Ag导电纳米颗粒和Al导电纳米颗粒等导电纳米颗粒中的两种或者多种导电纳米颗粒的混合，其同样可以获得与本揭示实施例相同的技术效果，可以根据实际需求进行选择，此处不做限制。
可选的，所述步骤S201中，用于浸泡金属导电纳米颗粒的酸性溶液可以为稀硝酸、醋酸、稀磷酸或者稀盐酸等弱酸性溶液。优选的，所述酸性溶液为浓度介于5~25%的稀盐酸。在其他的一些实施例中，所述酸性溶液也可以为稀硝酸、醋酸或者稀磷酸等，此处不做限制。
优选的，所述步骤S202中，对进过酸性溶液浸泡的金属导电纳米颗粒进行干燥的温度应为100℃。
具体地，所述步骤S203中，将金属导电纳米颗粒配置成酸性金属溶胶的溶剂体系为有机聚合物，如甲苯、苯等体系的混合物或者单一溶剂组成。
具体地，所述步骤S204中，酸性金属溶胶与有机材料的配比为3:3，以此既可以保证功能层25靠近阴极层26一侧表面的平整性以及与相邻膜层之间的粘附性，同时还可以使得金属导电纳米颗粒在功能层25中均匀分散，保证酸性金属溶胶的功能性。当然，酸性金属溶胶与有机材料的配比不仅限于本揭示实施例所提供的3:3，在其他一些实施例中，酸性金属溶胶与有机材料的配比只要介于1:5~5:1之间，均可以获得与上述实施例相同或者相似的技术效果，具体配比可以根据实际需求进行选择，此处不做限制。
本揭示实施例的有益效果：本揭示实施例提供的制作方法通过在阴极层与发光层之间增设功能层，功能层的材料包括酸性金属溶胶和有机材料，酸性金属溶胶中的氢离子可以附着在酸性金属溶胶中的金属纳米导电颗粒的表面，以此可以与阴极层中靠近功能层一侧表面的阳离子进行锚定，从而增强功能层与阴极层之间的粘附性，防止膜层分离、脱落的情况发生，此外阴极层中的自由电子的方向也会发生改变，避免与光子发生耦合反应产生表面等离激元波，从而提高有机发光二极管器件的出光效率，有机材料则可以保证的功能层靠近所述阴极层一侧表面的平整度，防止酸性金属溶胶中的金属导电纳米颗粒固化后所形成的凹凸不平的纳米结构减小功能层与阴极层之间的黏结强度，避免阴极层与功能层之间膜层分离、脱落的情况发生，同时还可以避免位于功能层下的电子传输层和发光层等膜层在形成阴极层的制程中被破坏。
综上所述，虽然本揭示以优选实施例揭露如上，但上述优选实施例并非用以限制本揭示，本领域的普通技术人员，在不脱离本揭示的精神和范围内，均可作各种更动与润饰，因此本揭示的保护范围以权利要求界定的范围为基准。

Claims (20)

  1. 一种有机发光二极管器件，包括依次层叠设置的阳极层、空穴传输层、发光层、电子传输层、功能层和阴极层；
    其中，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。
  2. 如权利要求1所述的有机发光二极管器件，其中，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
  3. 如权利要求1所述的有机发光二极管器件，其中，所述有机发光二极管器件还包括具有有机材料的缓冲层，所述缓冲层设置于所述功能层与所述电子传输层之间。
  4. 如权利要求1所述的有机发光二极管器件，其中，所述功能层的材料还包括有机材料。
  5. 如权利要求4所述的有机发光二极管器件，其中，所述酸性金属溶胶与所述功能层的所述有机材料的配比介于1:5~5:1之间。
  6. 如权利要求4所述的有机发光二极管器件，其中，所述功能层的所述有机材料包括环氧树脂。
  7. 如权利要求1所述的有机发光二极管器件，其中，所述有机发光二极管器件还包括空穴注入层和电子注入层，所述空穴注入层设置于所述空穴传输层与所述阳极层之间，所述电子注入层设置于所述功能层与所述电子传输层之间。
  8. 一种显示装置，包括装置主体和设置于所述装置主体上的显示面板，所述显示面板包括薄膜晶体管阵列基板和设置于所述薄膜晶体管阵列基板上的多个有机发光二极管器件，所述有机发光二极管器件包括依次层叠设置的阳极层、空穴传输层、发光层、电子传输层、功能层和阴极层；
    其中，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒。
  9. 如权利要求8所述的显示装置，其中，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
  10. 如权利要求8所述的显示装置，其中，所述有机发光二极管器件还包括具有有机材料的缓冲层，所述缓冲层设置于所述功能层与所述电子传输层之间。
  11. 如权利要求8所述的显示装置件，其中，所述功能层的材料还包括有机材料。
  12. 如权利要求11所述的显示装置，其中，所述酸性金属溶胶与所述功能层的所述有机材料的配比介于1:5~5:1之间。
  13. 如权利要求12所述的显示装置，其中，所述功能层的所述有机材料包括环氧树脂。
  14. 如权利要求8所述的显示装置，其中，所述有机发光二极管器件还包括空穴注入层和电子注入层，所述空穴注入层设置于所述空穴传输层与所述阳极层之间，所述电子注入层设置于所述功能层与所述电子传输层之间。
  15. 一种有机发光二极管器件的制作方法，包括：
    提供衬底，在所述衬底上依次形成阳极层、空穴传输层、发光层和电子传输层；
    在所述电子传输层远离所述发光层的一侧上制备功能层，所述功能层的材料包括酸性金属溶胶，所述酸性金属溶胶内含有金属导电纳米颗粒；以及
    在所述功能层远离所述电子传输层的一侧上制备阴极层。
  16. 如权利要求15所述的有机发光二极管器件的制作方法，其中，制备所述功能层材料的步骤包括：
    将金属导电纳米颗粒放置于酸性溶剂中浸泡12~24小时；
    将经过浸泡的所述金属导电纳米颗粒过滤，并在80~120℃的温度下进行干燥处理；
    将干燥处理后的所述金属导电纳米颗粒配置成酸性金属溶胶；以及
    将所述酸性金属溶胶与有机材料按照一定的配比混合形成所述功能层的材料。
  17. 如权利要求16所述的有机发光二极管的制作方法，其中，所述金属导电纳米粒子包括Au导电纳米颗粒、Ag导电纳米颗粒或者Al导电纳米颗粒中的一种或者多种。
  18. 如权利要求16所述的有机发光二极管的制作方法，其中，所述酸性溶剂包括稀硝酸、醋酸、稀磷酸或者稀盐酸。
  19. 如权利要求16所述的有机发光二极管的制作方法，其中，所述酸性溶剂的浓度介于5%~25%之间。
  20. 如权利要求16所述的有机发光二极管的制作方法，其中，所述酸性金属溶胶与所述有机材料的配比介于1:5~5:1之间。
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