WO2020237801A1 - 三维多孔结构复合体材料及制备方法、显示装置 - Google Patents

三维多孔结构复合体材料及制备方法、显示装置 Download PDF

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WO2020237801A1
WO2020237801A1 PCT/CN2019/096466 CN2019096466W WO2020237801A1 WO 2020237801 A1 WO2020237801 A1 WO 2020237801A1 CN 2019096466 W CN2019096466 W CN 2019096466W WO 2020237801 A1 WO2020237801 A1 WO 2020237801A1
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dimensional porous
composite material
porous structure
graphene
oxide
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French (fr)
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吴豪旭
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
    • H10D86/40—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs
    • H10D86/60—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates characterised by multiple TFTs wherein the TFTs are in active matrices

Definitions

  • the invention relates to the technical field of liquid crystal display, in particular to a three-dimensional porous structure composite material, a preparation method thereof, and a display device.
  • liquid crystal display panels With the development of high-generation TFT-LCDs, the panels are evolving toward large-scale, high-quality, and high-resolution panels. As the size of the liquid crystal display panel becomes larger and larger, the length of the metal wiring arranged on it has increased substantially. In order to increase the visual and appearance effects of the display panel, a narrow border or even borderless technology is proposed and developed. However, this design is the same as the design with the array substrate side light emitting outward (that is, the array substrate with bottom emission structure). Defects such as edge light leakage and contrast reduction.
  • the main material of the metal gate 111 (Gate) wiring is Cu/Mo, Cu/MoNd, Cu/MoTi and Cu/Ti
  • the metal material with strong reflection has high reflectivity.
  • the emissivity of the metal electrode is greater than 40% in the visible light 400-700nm, and the strong reflection seriously affects the viewing effect of the human eye.
  • the metal traces used as the data lines are shown at 112 in FIG. 1B.
  • a low-reflection metal film layer 113 has been developed as a barrier layer, as shown in FIG. 1C, to reduce the reflectivity, or roughening the surface of the metal layer to reduce the reflectivity, but the effect is not good.
  • a 1/4 ⁇ wavelength polarizer or low reflection film, etc.
  • the purpose of the present invention is to provide a three-dimensional porous structure composite material and a preparation method thereof, and a display device using the material.
  • the metal electrode layers in the display device are made of composite materials with low reflection and a three-dimensional porous structure, which can enhance the absorption of visible light sources and reduce their reflectivity to further improve the contrast and visual effects.
  • a three-dimensional porous structure composite material comprising: a graphene framework and black metal oxide particles filled in the graphene framework, the graphene framework having With a three-dimensional porous structure, the composite material is used to absorb visible light sources and reduce its reflectivity.
  • the composite material further includes a doped compound of black metal oxide.
  • the black metal oxide is molybdenum oxide.
  • the doping compound is at least one of neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, and aluminum-containing molybdenum oxide.
  • the particle size of the particles is 10 nanometers to 100 nanometers.
  • the present invention provides a preparation method of a three-dimensional porous structure composite material.
  • the preparation method includes the following steps: (1) dissolving graphene oxide and polystyrene materials in deionized water respectively; (2) dissolving polystyrene solution Drop into the graphene oxide solution, and perform ultrasonic stirring and vacuum filtration treatment to obtain a polystyrene/graphene oxide film; (3) heat the polystyrene/graphene oxide film to obtain a three-dimensional Porous graphene structure; (4) Dissolving three-dimensional porous graphene structure in deionized water to form a graphene solution; (5) Mixing particles of black metal oxide or its doped compound with the graphene solution , To further obtain a composite material with a three-dimensional porous structure.
  • step (5) it further includes: adding polyvinyl alcohol as the particles of the black metal oxide or its doping compound and the graphene during the mixing process.
  • the binder of the solution is added to step (5).
  • step (5) it further includes the step of adding ethylene glycol as a defoaming agent during the mixing process.
  • step (5) it further includes the steps of: obtaining a precursor slurry mixture through a dispersant during the mixing process; and obtaining the precursor slurry mixture After processing.
  • a composite material with a three-dimensional porous structure is obtained.
  • the dispersant is 0.05% polyvinylamide or polyacrylic acid as the main dispersant.
  • a display device which includes: an array substrate including a first metal electrode layer disposed on a base substrate, and the material of the first metal electrode layer is the above Three-dimensional porous structure composite material.
  • a metal electrode insulating layer, an active layer, an etching stop layer and a second metal electrode layer are further stacked on the metal electrode layer in sequence.
  • the material of the second metal electrode layer is the aforementioned three-dimensional porous structure composite material.
  • the advantage of the present invention is that the three-dimensional porous structure composite material of the present invention can strengthen the absorption of visible light sources, thereby reducing its reflectivity, and the display device using the material can thereby improve the contrast and viewing visual effects.
  • 1A, 1B, and 1C are schematic diagrams of the structure of an existing TFT-LCD display device and a schematic diagram of the display having a bottom emission type structure.
  • FIGS. 2A and 2B are partial structural diagrams of the three-dimensional porous structure composite material of the present invention.
  • Figure 3 is a schematic diagram of the three-dimensional porous graphene structure of the present invention.
  • FIG. 4 is a flow chart of the steps of the method for preparing the three-dimensional porous structure composite material of the present invention.
  • FIG. 5 is a schematic diagram of the preparation process of the three-dimensional porous graphene structure in the three-dimensional porous structure composite material of the present invention.
  • Fig. 6 is a schematic diagram of the preparation process of the three-dimensional porous structure composite material of the present invention.
  • FIG. 7A is a schematic structural diagram of a display device of the present invention.
  • FIG. 7B is a schematic diagram of the structure of the array substrate shown in FIG. 7A.
  • the embodiment of the present invention provides a three-dimensional porous structure composite material, a preparation method thereof, and a display device using the material.
  • the detailed description will be given below.
  • the present invention provides a three-dimensional porous structure composite material, the composite material includes: a graphene skeleton 210 (hereinafter referred to as a three-dimensional porous graphene structure), as shown in FIG. 3, and filled in the graphite
  • the black metal oxide particles 220 of alkene skeleton are shown in FIG. 2A and FIG. 2B.
  • the graphene skeleton has a three-dimensional porous structure, and the composite material is used to absorb visible light sources and reduce its reflectivity.
  • the composite material also includes a black metal oxide doped compound (not marked in the figure).
  • the black metal oxide is molybdenum oxide.
  • the doping compound is at least one of neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, and aluminum-containing molybdenum oxide.
  • the particle size of the black metal oxide or its doped compound is 10 nm to 100 nm.
  • the present invention provides a composite material with low reflection and a three-dimensional porous structure (black metal oxide 220, such as molybdenum oxide, and doped compounds, such as neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, aluminum-containing Molybdenum oxide, and low-reflective graphene material 210) and the three-dimensional porous structure composite material shown in Figures 2A-2B is prepared by chemical/electrochemical methods to enhance the absorption of visible light sources, thereby reducing its reflectivity .
  • the array substrate adopts the composite material of the three-dimensional porous structure, the contrast ratio and the viewing visual effect can be improved.
  • FIG. 4 is a flow chart of the steps of the method for preparing the three-dimensional porous structure composite material of the present invention.
  • 5 is a schematic diagram of the preparation process of the three-dimensional porous graphene structure in the three-dimensional porous structure composite material of the present invention.
  • Fig. 6 is a schematic diagram of the preparation process of the three-dimensional porous structure composite material of the present invention.
  • the present invention provides a method for preparing a three-dimensional porous structure composite material, the method includes the following steps:
  • step S410 the graphene oxide and polystyrene materials are respectively dissolved in deionized water.
  • select graphene oxide GO and polystyrene PS materials respectively dissolve them in an appropriate amount of deionized water, and make the two materials fully dissolved in deionized water by means of ultrasonic stirring or magnetic stirring.
  • Step S420 Drop the polystyrene solution into the graphene oxide solution, and perform ultrasonic stirring and vacuum filtration treatment to obtain a polystyrene/graphene oxide film.
  • the fully dissolved polystyrene solution is slowly dropped into the graphene oxide solution, where the polystyrene solution is positive and the graphene oxide solution is negative, and they are mixed thoroughly by ultrasound. Since these two materials have opposite polarities, they can be fully mixed and distributed evenly during ultrasonic stirring.
  • the ultrasonic temperature is normal temperature, for example, 25 degrees, and the ultrasonic time is 20-60 minutes. Then vacuum filtration is performed to obtain a polystyrene/graphene oxide film.
  • Step S430 heat the polystyrene/graphene oxide film to obtain a three-dimensional porous graphene structure.
  • the polystyrene/graphene oxide film is placed in a vacuum environment or an inert gas environment for heat treatment.
  • the treatment temperature is about 300 degrees to 500 degrees, wherein the high temperature degradation temperature of polystyrene PS If it is greater than 280 degrees, the reduction temperature of graphene oxide is 300 degrees, and the heat treatment time is 2 hours to 4 hours.
  • polystyrene is eliminated and graphene oxide is reduced to obtain a three-dimensional porous graphene structure, as shown in Figure 5 Shown to avoid graphene easy agglomeration.
  • Step S440 Dissolve the three-dimensional porous graphene structure in deionized water to form a graphene solution.
  • Step S450 mixing the particles of the black metal oxide or its doped compound with the graphene solution, and adding a dispersant to the graphene solution for stirring/ultrasonic processing, thereby obtaining a precursor slurry mixture.
  • the spray granulation precursor slurry is used to prepare nano-scale black metal oxides, such as molybdenum oxide, or black metal oxide doped compounds, such as neodymium-containing molybdenum oxide, titanium-containing Raw material powder particles such as at least one of molybdenum oxide and aluminum-containing molybdenum oxide and the graphene solution pre-dissolved in deionized water are put together in a stirring ball mill or an ultrasonic machine for mixing treatment.
  • a dispersant is added and agitating/ultrasonic treatment is performed to obtain a uniformly dispersed precursor slurry mixture.
  • the precursor slurry mixture includes: at least one of black metal oxide (for example, molybdenum oxide) or doped compound of black metal oxide (for example, neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, and aluminum-containing molybdenum oxide) ) And graphene suspension.
  • black metal oxide for example, molybdenum oxide
  • doped compound of black metal oxide for example, neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, and aluminum-containing molybdenum oxide
  • the dispersant is 0.05% polyvinylamide (ie PEI) or polyacrylic acid as the main dispersant.
  • step S450 it further includes: during the mixing process, adding polyvinyl alcohol as a binder of the particles of the black metal oxide or its doping compound and the graphene solution.
  • the particles of ferrous metal oxides (such as molybdenum oxide) or doped compounds of ferrous metal oxides (such as at least one of neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, and aluminum-containing molybdenum oxide) are positively charged , And the graphene solution is negative, so the particles of the black metal oxide or its doped compound can be well attached/filled in the graphene framework.
  • an appropriate amount of polyvinyl alcohol can be added as a binder (its decomposition temperature is 250 degrees).
  • step S450 it further includes the step of adding ethylene glycol as a defoaming agent during the mixing process, so as to avoid the influence of air bubbles in the process of impregnating and extruding excess slurry from the precursor slurry Performance situation.
  • Step S460 Stir and rotate the precursor slurry mixture.
  • ferrous metal oxides such as molybdenum oxide
  • doped compounds of ferrous metal oxides such as neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide
  • At least one of molybdenum oxide and aluminum-containing molybdenum oxide) particles/graphene suspension can be well and uniformly distributed to form a composite material.
  • Step S470 obtaining a composite material with a three-dimensional porous structure through vacuum filtration and heating treatment.
  • the precursor slurry mixture is vacuum filtered, uniformly coated on the glass substrate, and the composite is subjected to VCD/HP processing.
  • the glass substrate coated with the composite is placed in an electric furnace at a heating rate of 1 ⁇ 5°C/min, and heated at 250°C for 20min ⁇ 40min, the binder PVA is eliminated, leaving more pores Black metal oxide (such as molybdenum oxide) or black metal oxide doped compound (such as at least one of neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, aluminum-containing molybdenum oxide) particles/graphene three-dimensional porous Structural composite material.
  • Black metal oxide such as molybdenum oxide
  • black metal oxide doped compound such as at least one of neodymium-containing molybdenum oxide, titanium-containing molybdenum oxide, aluminum-containing molybdenum oxide
  • FIG. 7A is a schematic structural diagram of a display device of the present invention.
  • FIG. 7B is a schematic diagram of the structure of the array substrate shown in FIG. 7, wherein the array substrate uses a three-dimensional porous structure composite material.
  • a display device 700 is provided, and the display device 700 includes an array substrate 701.
  • the array substrate 701 includes: a metal electrode layer (720, 760) disposed on a base substrate 710; the material of the metal electrode layer is the above-mentioned three-dimensional porous structure composite material.
  • the base substrate is, for example, a glass substrate, but of course it is not limited thereto, such as a PI substrate and the like.
  • a first metal electrode layer 720 is formed on the base substrate.
  • a metal electrode insulating layer 730 is formed on the first metal electrode layer 720.
  • An active layer 740 is formed on the metal electrode insulating layer 730.
  • An etching stop layer 750 is provided on the active layer 740.
  • a second metal electrode 760 is provided on the etching stop layer 750.
  • the first metal electrode layer 720 is patterned to form a gate.
  • the second metal electrode layer 760 is patterned to form a source electrode 761 and a drain electrode 762 respectively.
  • the material of the first metal electrode layer 720 and the second metal electrode layer 760 is the aforementioned three-dimensional porous structure composite material. Due to the use of the composite material, it can enhance the absorption of visible light sources, thereby reducing its reflectivity, and improving contrast and viewing visual effects. In this way, not only can save costs, but also enhance the competitiveness of products.
  • the display device 700 of the present invention may include, for example, a display panel used in the field of reflection reduction, a display panel with a bottom emission structure (ie, a display panel whose array substrate side emits light outward), and a touch screen display panel.
  • the subject of this application can be manufactured and used in industry and has industrial applicability.

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Abstract

一种三维多孔结构复合体材料及其制备方法、采用该材料的显示装置，该显示装置中的金属电极层均采用低反射且具有三维多孔结构的复合体材料，从而能够加强其对可见光源的吸收，并且降低其反射率，以进一步提高对比度和观赏视觉效果。

Description

三维多孔结构复合体材料及制备方法、显示装置 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种三维多孔结构复合体材料及其制备方法、显示装置。
 背景技术
在液晶显示面板中，随着高世代TFT-LCD的发展，面板朝着大型化、高画质、高分辨率演变。当液晶显示面板的尺寸越来越大时，设置于其上的金属布线数量级长度均有着大幅增加。为了增加显示面板的视觉和外观效果，提出并发展窄边框，甚至无边框技术，但是该种设计与阵列基板侧出光朝外（即采用底发射型结构的阵列基板）的设计一样，需面对边缘漏光、对比度降低等不良问题。如图1A、图1B和图1C所示，当采用底发射型结构的阵列基板时，其金属栅极111（Gate）布线主要材质为Cu/Mo、Cu/MoNd、Cu/MoTi和Cu/Ti等强反射的金属材料，其金属部分的反射率很高。一般在金属电极的发射率在可见光400～700nm的平均反射率大于40%，强烈的反光严重影响人眼观赏的效果。另外，作为数据线的金属走线如图1B所示的标号112。
 技术问题
目前已有开发低反射金属膜层113作为阻挡层，如图1C所示，以降低反射率，或者对金属层表面进行粗化处理进而降低其反射率，但是效果不佳。另外，通过贴敷一张1/4λ波长的偏光片（或低反射膜等）来减少金属反射，但是采用该制备方式会增加生产工艺成本。
 技术解决方案
本发明的目的在于，提供一种三维多孔结构复合体材料及其制备方法、采用该材料的显示装置。所述显示装置中的金属电极层均采用低反射且具有三维多孔结构复合体材料，从而能够加强对可见光源的吸收，并且降低其反射率，以进一步提高对比度和观赏视觉效果。
根据本发明的一方面，提供了一种三维多孔结构复合体材料，所述复合体材料包括：一石墨烯骨架和填充于所述石墨烯骨架的黑色金属氧化物颗粒，所述石墨烯骨架具有三维多孔结构，所述复合体材料用于对可见光源的吸收，并且降低其反射率。
在本发明的一实施例中，所述复合体材料还包括黑色金属氧化物的掺杂化合物。
在本发明的一实施例中，所述黑色金属氧化物为氧化钼。
在本发明的一实施例中，所述掺杂化合物为含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种。
在本发明的一实施例中，所述颗粒的粒径为10纳米～100纳米。
本发明提供一种三维多孔结构复合体材料的制备方法，所述制备方法包括以下步骤：（1）将氧化石墨烯和聚苯乙烯材料分别溶解于去离子水中；（2）将聚苯乙烯溶液滴入氧化石墨烯溶液中，并进行超声搅拌及真空抽滤处理，以获得聚苯乙烯/氧化石墨烯薄膜；（3）将所述聚苯乙烯/氧化石墨烯薄膜进行加热处理，以获得三维多孔石墨烯结构；（4）将三维多孔石墨烯结构溶于去离子水中，以形成石墨烯溶液；（5）将黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液进行混合处理，以进一步获得具有三维多孔结构的复合体材料。
在本发明的一实施例中，在步骤（5）中，进一步包括：在进行混合处理的过程中，加入聚乙烯醇作为所述黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液的粘结剂。
在本发明的一实施例中，在步骤（5）之中，进一步包括步骤：在进行混合处理的过程中，加入作为消泡剂的乙二醇。
在本发明的一实施例中，在步骤（5）之中，进一步包括步骤：在进行混合处理的过程中，通过分散剂获得一前驱体浆料混合物；以及在获得所述前驱体浆料混合物之后通过处理。获得具有三维多孔结构的复合体材料。
在本发明的一实施例中，所述分散剂为0.05%的聚乙烯酰胺或聚丙烯酸为主体的分散剂。
根据本发明一方面，提供一种显示装置，其包括：一阵列基板，所述阵列基板包括一设置于一衬底基板上的第一金属电极层，所述第一金属电极层的材料为上述三维多孔结构复合体材料。
在本发明的一实施例中，在所述金属电极层上进一步依次层叠设置金属电极绝缘层、有源层、刻蚀阻挡层和第二金属电极层。
在本发明的一实施例中，所述第二金属电极层的材料为上述三维多孔结构复合体材料。
 有益效果
本发明的优点在于，本发明所述三维多孔结构复合体材料能够加强对可见光源的吸收，从而降低其反射率，且采用该材料的显示装置藉此可以提高对比度和观赏视觉效果。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，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1A、图1B和图1C是现有TFT-LCD显示器件的结构示意图及该显示器具有底发射型结构的示意图。
图2A和图2B是本发明的三维多孔结构复合体材料的局部结构示意图。
图3是本发明的三维多孔的石墨烯结构示意图。
图4是本发明的三维多孔结构复合体材料的制备方法的步骤流程图。
图5是本发明的三维多孔结构复合体材料中的三维多孔石墨烯结构的制备工艺示意图。
图6是本发明的三维多孔结构复合体材料的制备工艺的框架示意图。
图7A是本发明一显示装置的结构示意图。
图7B是图7A所示的阵列基板的结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明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发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。
本发明的说明书和权利要求书以及上述附图中的术语“第一”、“第二”、“第三”等（如果存在）是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应当理解，这样描述的对象在适当情况下可以互换。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。
在本专利文档中，下文论述的附图以及用来描述本发明公开的原理的各实施例仅用于说明，而不应解释为限制本发明公开的范围。所属领域的技术人员将理解，本发明的原理可在任何适当布置的系统中实施。将详细说明示例性实施方式，在附图中示出了这些实施方式的实例。此外，将参考附图详细描述根据示例性实施例的终端。附图中的相同附图标号指代相同的元件。
本发明说明书中使用的术语仅用来描述特定实施方式，而并不意图显示本发明的概念。除非上下文中有明确不同的意义，否则，以单数形式使用的表达涵盖复数形式的表达。在本发明说明书中，应理解，诸如“包括”、“具有”以及“含有”等术语意图说明存在本发明说明书中揭示的特征、数字、步骤、动作或其组合的可能性，而并不意图排除可存在或可添加一个或多个其他特征、数字、步骤、动作或其组合的可能性。附图中的相同参考标号指代相同部分。
本发明实施例提供一种三维多孔结构复合体材料及其制备方法、采用该材料的显示装置。以下将分别进行详细说明。
本发明提供了一种三维多孔结构复合体材料，所述复合体材料包括：一石墨烯骨架210（如下文所称的三维多孔石墨烯结构)，如图3所示，以及填充于所述石墨烯骨架的黑色金属氧化物颗粒220，如图2A和图2B所示。所述石墨烯骨架具有三维多孔结构，所述复合体材料用于对可见光源的吸收，并且降低其反射率。
具体地，所述复合体材料还包括黑色金属氧化物的掺杂化合物（图中未标示）。其中，在本发明一实施例中，所述黑色金属氧化物为氧化钼。所述掺杂化合物为含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种。
在如图2A和图2B所示的本发明的三维多孔结构复合体材料的局部示意图中，黑色金属氧化物或及其掺杂化合物的颗粒粒径为10纳米～100纳米。
本发明提供了一种低反射且具有三维多孔结构的复合体材料（黑色金属氧化物220，例如氧化钼，及其掺杂化合物，例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼，以及低反射的石墨烯材料210）并且通过化学/电化学方法制备如图2A-2B所示的三维多孔结构的复合体材料，用于加强对可见光源的吸收，从而降低其反射率。当阵列基板采用该三维多孔结构的复合体材料，于是，能够提高对比度和观赏视觉效果。
图4是本发明三维多孔结构复合体材料的制备方法的步骤流程图。图5是本发明的三维多孔结构复合体材料中的三维多孔石墨烯结构的制备工艺示意图。图6是本发明的三维多孔结构复合体材料的制备工艺的框架示意图。
参考图4至6所示，在本发明的一实施例中，本发明提供一种三维多孔结构复合体材料的制备方法，所述制备方法包括以下步骤：
结合参考图5，步骤S410：将氧化石墨烯和聚苯乙烯材料分别溶解于去离子水中。
在此步骤中，选取氧化石墨烯GO和聚苯乙烯PS材料，分别溶解于适量的去离子水中，并且通过超声搅拌或磁力搅拌的方法，使两种材料分别充分溶解于去离子水中。
步骤S420：将聚苯乙烯溶液滴入氧化石墨烯溶液中，并进行超声搅拌及真空抽滤处理，以获得聚苯乙烯/氧化石墨烯薄膜。
将充分溶解的聚苯乙烯溶液缓慢滴入氧化石墨烯溶液，其中聚苯乙烯溶液呈正性，氧化石墨烯溶液呈负性，通过超声充分混合。由于这两种材料带相反极性电性，故在超声搅拌处理时，可以充分均匀混合分布。优选的，在超声充分混合时，采用超声温度为常温，例如25度，超声时间为20分～60分。随后进行真空抽滤，得到聚苯乙烯/氧化石墨烯薄膜。
步骤S430：将所述聚苯乙烯/氧化石墨烯薄膜进行加热处理，以获得三维多孔石墨烯结构。
在此步骤中，将所述聚苯乙烯/氧化石墨烯薄膜置于真空环境或惰性气体环境中加热处理，优选地，处理温度约为300度～500度，其中聚苯乙烯PS的高温降解温度为大于280度，氧化石墨烯的还原温度为300度，加热处理时间为2小时至4小时，此时聚苯乙烯被消除，氧化石墨烯被还原，从而获得三维多孔石墨烯结构，如图5所示，以避免石墨烯易团聚现象。
步骤S440：将三维多孔石墨烯结构溶于去离子水中，以形成石墨烯溶液。
步骤S450：将黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液进行混合处理，并在其中添加分散剂以进行搅拌/超声处理，进而获得一前驱体浆料混合物。
在此步骤中，采用喷雾造粒前驱体浆料的制备方法，将纳米级别的黑色金属氧化物，例如氧化钼，或黑色金属氧化物的掺杂化合物，例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种等原料粉体颗粒和预先溶解于去离子水的石墨烯溶液，一起置入搅拌球磨机或超声机中进行混合处理。在此其中，添加分散剂并进行搅拌/超声处理，以获得分散均匀的前驱体浆料混合物。该前驱体浆料混合物包括：黑色金属氧化物（例如氧化钼）或黑色金属氧化物的掺杂化合物（例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种）以及石墨烯悬浮液。
其中，所述分散剂为0.05%的聚乙烯酰胺（即PEI）或聚丙烯酸为主体的分散剂。
可选的，在步骤S450中，进一步包括：在进行混合处理的过程中，加入聚乙烯醇作为所述黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液的粘结剂。
黑色金属氧化物（例如氧化钼）或黑色金属氧化物的掺杂化合物（例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种）的颗粒带有正电性，而石墨烯溶液带有负性，于是，这些黑色金属氧化物或其掺杂化合物的颗粒能够良好地附着/填充于石墨烯骨架。为了保证充分混合均匀，可以加入适量的聚乙烯醇作为粘结剂（其分解温度为250度）。
另外，在步骤S450之中，进一步包括步骤：在进行混合处理的过程中，加入作为消泡剂的乙二醇，这样能够避免前驱体浆料在浸渍和挤出多余浆料的过程中气泡影响性能的情况。
步骤S460：将所述前驱体浆料混合物进行搅拌旋转。
将前驱体浆料混合物置于一球磨器中搅拌旋转1小时至2小时，使得黑色金属氧化物（例如氧化钼）或黑色金属氧化物的掺杂化合物（例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种）颗粒/石墨烯悬浮液能够很好地均匀分布，以形成复合体材料。
步骤S470：通过真空抽滤和加热处理，以获得具有三维多孔结构的复合体材料。
在本步骤中，将前驱体浆料混合物通过真空抽滤，均匀涂覆于玻璃基板上，将复合体进行VCD/HP处理。
另外，以1~5℃/min的加热速度，将涂覆复合体的玻璃基板放入电热炉中，并且在250℃下加热20min~40min，粘结剂PVA被消除，留下更多孔隙的黑色金属氧化物（例如氧化钼）或黑色金属氧化物的掺杂化合物（例如含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种）颗粒/石墨烯的三维多孔结构的复合体材料。
上述步骤的实施可以参考图6所示。
图7A是本发明一显示装置的结构示意图。图7B是图7所示的阵列基板的结构示意图，其中，所述阵列基板采用了三维多孔结构复合体材料。
参阅图7A，提供一种显示装置700，所述显示装置700包括一阵列基板701。
参阅图7B，所述阵列基板701包括：一设置于一衬底基板710上的金属电极层（720、760）；所述金属电极层的材料为上述三维多孔结构复合体材料。
具体地，所述衬底基板例如为玻璃基板，当然不限于此，例如PI基板等。
在所述衬底基板上形成第一金属电极层720。在所述第一金属电极层720上形成一金属电极绝缘层730。在所述金属电极绝缘层730上形成一有源层740。在所述有源层740上设有刻蚀阻挡层750。在刻蚀阻挡层750上设有第二金属电极760。其中，所述第一金属电极层720经图案化后形成栅极。所述第二金属电极层760经图案化后分别形成源极761和漏极762。其中，第一金属电极层720和第二金属电极层760的材料为上述三维多孔结构复合体材料。由于采用该复合材料，因此，能够加强对可见光源的吸收，从而降低其反射率，以及提高对比度和观赏视觉效果。这样，不仅能够节省成本，而且提升产品的竞争力。
另外，本发明所述显示装置700可以包括例如为用于降低反射领域的显示面板、具有底发射结构的显示面板（即阵列基板侧出光朝外的显示面板）、及触屏显示面板。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
 工业实用性
本申请的主题可以在工业中制造和使用，具备工业实用性。

Claims (13)

  1. 一种三维多孔结构复合体材料，其包括：一石墨烯骨架和填充于所述石墨烯骨架的黑色金属氧化物颗粒，所述石墨烯骨架具有三维多孔结构，所述复合体材料用于对可见光源的吸收，并且降低其反射率。
  2. 根据权利要求1所述的三维多孔结构复合体材料，其中所述复合体材料还包括黑色金属氧化物的掺杂化合物。
  3. 根据权利要求1所述的三维多孔结构复合体材料，其中所述黑色金属氧化物为氧化钼。
  4. 根据权利要求2所述的三维多孔结构复合体材料，其中所述掺杂化合物为含钕的氧化钼、含钛的氧化钼、含铝的氧化钼中的至少一种。
  5. 根据权利要求2所述的三维多孔结构复合体材料，其中所述颗粒的粒径为10纳米～100纳米。
  6. 一种三维多孔结构复合体材料的制备方法，其中所述制备方法包括以下步骤：
    （1）将氧化石墨烯和聚苯乙烯材料分别溶解于去离子水中；
    （2）将聚苯乙烯溶液滴入氧化石墨烯溶液中，并进行处理以获得聚苯乙烯/氧化石墨烯薄膜；
    （3）将所述聚苯乙烯/氧化石墨烯薄膜进行加热处理，以获得三维多孔石墨烯结构；
    （4）将三维多孔石墨烯结构溶于去离子水中，以形成石墨烯溶液；以及
    （5）将黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液进行混合处理，以进一步获得具有三维多孔结构的复合体材料。
  7. 根据权利要求6所述三维多孔结构复合体材料的制备方法，其中在步骤（5）中，进一步包括：在进行混合处理的过程中，加入聚乙烯醇作为所述黑色金属氧化物或其掺杂化合物的颗粒与所述石墨烯溶液的粘结剂。
  8. 根据权利要求6所述三维多孔结构复合体材料的制备方法，其中在步骤（5）之中，进一步包括步骤：在进行混合处理的过程中，加入作为消泡剂的乙二醇。
  9. 根据权利要求6所述三维多孔结构复合体材料的制备方法，其中在步骤（5）之中，进一步包括步骤：在进行混合处理的过程中，通过分散剂获得一前驱体浆料混合物；以及在获得所述前驱体浆料混合物之后通过处理。获得具有三维多孔结构的复合体材料。
  10. 根据权利要求9所述三维多孔结构复合体材料的制备方法，其中所述分散剂为0.05%的聚乙烯酰胺或聚丙烯酸为主体的分散剂。
  11. 一种显示装置，其包括：一阵列基板，所述阵列基板包括一设置于一衬底基板上的第一金属电极层，所述第一金属电极层的材料为权利要求1所述的三维多孔结构复合体材料。
  12. 根据权利要求11所述的显示装置，其中，在所述金属电极层上进一步依次层叠设置金属电极绝缘层、有源层、刻蚀阻挡层和第二金属电极层。
  13. 根据权利要求12所述的显示装置，其中，所述第二金属电极层的材料为权利要求1所述的三维多孔结构复合体材料。
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