Conductive film layer, organic electroluminescent device, display device and method

Abstract

The present disclosure provides a conductive film layer, an organic electroluminescent device, a display device and a method. The conductive film layer includes a substrate and conductive metal nano-ions distributed in the substrate; the substrate is at least one of an organic network polymer, an organic porous polymer and an inorganic porous material.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a conductive film layer, an organic electroluminescent device, a display device, and a method. Background Art

[0002] Currently, in the production process of active-matrix organic light-emitting diode (AMOLED) products, in order to achieve the purpose of precisely controlling pixel switching, a top-emitting device structure is adopted, that is, a microcavity is formed between the anode and the cathode. Therefore, the anode needs to be a total reflector, and the cathode is preferably a transparent cathode; since the current method for preparing a transparent oxide electrode generally requires the use of a magnetron sputtering method, this method will cause high-temperature cracking of the underlying evaporated material and high-energy ion damage due to the high energy and high temperature in sputtering. In view of this, a high-temperature thermal evaporation metal composite film scheme (Mg / Ag alloy) is used in mass production to achieve a higher transmittance and a lower resistance.

[0003] Although the metal composite film can meet the requirements of mass production, for further improving the cathode transmittance and the internal light extraction rate of the device, it is necessary to further improve the cathode transmittance of the device. However, the transmittance of the metal composite film has basically reached the limit under the premise of meeting the resistance requirements. It is urgent to develop a new cathode material to meet higher product requirements. Summary of the Invention

[0004] The purpose of the technical solution of the present disclosure is to provide a conductive film layer, an organic electroluminescent device, a display device, and a method, which are used to solve the problem that the existing cathode material cannot meet the requirements of the cathode transmittance and the lower resistance requirements.

[0005] An embodiment of the present disclosure provides a conductive film layer, which includes a substrate and conductive metal nano-ions distributed in the substrate; the substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material.

[0006] Optionally, in the conductive film layer, the specific surface area of the substrate on which the conductive metal nano-ions are distributed is greater than 150 m 2 / g.

[0007] Optionally, in the conductive film layer, when the substrate is an organic network polymer or an organic porous polymer, the substrate and the conductive metal nano-ions are chelated and connected through a coordination bond;

[0008] When the substrate is an inorganic porous material, the substrate and the conductive metal nano-ions are coordinately connected through intermolecular forces.

[0009] Optionally, for the conductive film layer, the conductive metal nano-ions are uniformly distributed in the substrate, and the distribution ratio is between 1% and 70%.

[0010] Optionally, for the conductive film layer, the conductive metal nano-ions include at least one of Ag, Mg, Cu, Au, and Al.

[0011] Optionally, for the conductive film layer, the organic network polymer and the organic porous polymer respectively include covalent organic framework (COF) materials.

[0012] An embodiment of the present disclosure further provides an organic electroluminescent device, including an anode and a light-emitting functional layer. Further, it includes the conductive film layer as described in any one of the above, and the conductive film layer is formed as a cathode, which is disposed opposite to the anode, and the light-emitting functional layer is located between the conductive film layer and the anode.

[0013] Optionally, for the organic electroluminescent device, the thickness of the substrate is between 30 nanometers and 50 nanometers.

[0014] Optionally, for the organic electroluminescent device, when the conductive metal nano-ions in the substrate include Ag and / or Mg, the thickness of the substrate is between 40 nanometers and 50 nanometers.

[0015] Optionally, for the organic electroluminescent device, the transmittance of the conductive film layer corresponding to red light is between 63% and 69%, the transmittance corresponding to green light is between 67% and 73%, and the transmittance corresponding to blue light is between 73% and 77%.

[0016] Optionally, for the organic electroluminescent device, the light-emitting functional layer includes an electron transport layer, the conductive film layer is connected to the electron transport layer, and the electron transport layer is made of an aromatic compound having an electron-withdrawing group of a nitrogen heterocyclic type.

[0017] Optionally, for the organic electroluminescent device, the light-emitting functional layer includes a first light-emitting unit for emitting red light, a second light-emitting unit for emitting green light, and a third light-emitting unit for emitting blue light;

[0018] wherein, the distance between the first film layer portion of the conductive film layer corresponding to the first light-emitting unit and the anode is greater than the distance between the second film layer portion of the conductive film layer corresponding to the second light-emitting unit and the anode;

[0019] The distance between the second film layer portion of the conductive film layer corresponding to the second light-emitting unit and the anode is greater than the distance between the third film layer portion of the conductive film layer corresponding to the third light-emitting unit and the anode.

[0020] Optionally, in the organic electroluminescent device, the conductive film layer is formed by evaporation or spin coating.

[0021] An embodiment of the present disclosure also provides a display device, including the organic electroluminescent device as described in any one of the above.

[0022] An embodiment of the present disclosure also provides a method for manufacturing an electrode material, the method including:

[0023] Providing conductive metal nano-ions and material monomers;

[0024] Using the material monomers and the conductive metal nano-ions to manufacture an electrode material including a substrate and conductive metal nano-ions distributed in the substrate;

[0025] Wherein, the substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material.

[0026] Optionally, in the manufacturing method, where the material monomer is an organic monomer, manufacturing an electrode material including a substrate and conductive metal nano-ions distributed in the substrate includes:

[0027] Forming an organic network polymer from the organic monomer;

[0028] Chelating the conductive metal nano-ions with the organic network polymer having a preset temperature to form the electrode material.

[0029] Optionally, in the organic electroluminescent device, where chelating the conductive metal nano-ions with the organic network polymer having a preset temperature to form the electrode material includes:

[0030] Placing the organic network polymer in a preset solvent;

[0031] After heating the preset solvent to the preset temperature, adding the conductive metal nano-ions to chelate the conductive metal nano-ions with the organic network polymer in the preset solvent;

[0032] Filtering the preset solvent and vacuum drying the electrode material obtained by filtering the preset solvent to obtain the electrode material.

[0033] Optionally, in the organic electroluminescent device, where the material monomer is an organic monomer, manufacturing an electrode material including a substrate and conductive metal nano-ions distributed in the substrate includes:

[0034] Chelating the conductive metal nano-ions with the organic monomer to obtain a chelated metal;

[0035] The chelating metal is placed in a preset solvent, so that the organic monomers in the chelating metal polymerize to form an organic network polymer, and the electrode material is obtained.

[0036] Optionally, for the organic electroluminescent device, wherein after the chelating metal is placed in the preset solvent and the organic monomers in the chelating metal polymerize to form an organic network polymer, the method further includes:

[0037] Filter the preset solvent, and vacuum-dry the electrode material obtained by filtering the preset solvent. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure text or the related art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure text. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic diagram of the process of manufacturing the electrode material in one embodiment of the present disclosure;

[0040] Figure 2 It is a schematic diagram of the process of manufacturing the electrode material in another embodiment of the present disclosure;

[0041] Figure 3 Shown is one of the cross-sectional schematic diagrams of the organic electroluminescent device in the embodiment of the present disclosure;

[0042] Figure 4 Shown is another cross-sectional schematic diagram of the organic electroluminescent device in the embodiment of the present disclosure;

[0043] Figure 5 It is a schematic diagram of the structure of the display device in the embodiment of the present disclosure;

[0044] Figure 6 It is a schematic diagram of the process of one embodiment of manufacturing a cathode using the electrode material in the embodiment of the present disclosure;

[0045] Figure 7 It is a schematic diagram of the process of another embodiment of manufacturing a cathode using the electrode material in the embodiment of the present disclosure;

[0046] Figure 8a and Figure 8b It is a schematic diagram of the SEM spectrum of the electrode material in the embodiment of the present disclosure;

[0047] Figure 9 It is a schematic diagram of the TEM spectrum of the electrode material;

[0048] Figure 10 Schematic diagram of the photoelectron spectrum of the electrode material

[0049] Figure 11 Schematic diagram of the SEM pattern of the prepared cathode

[0050] Figure 12 Schematic flow chart of the preparation method of the electrode material according to the embodiment of the present disclosure

[0051] Figure 13 Comparison chart of the transmittance of the cathode made of the conductive film layer according to the embodiment of the present disclosure and the cathode of conventional materials

[0052] Figure 14 Comparison chart of the transmittance of the conductive film layer according to the embodiment of the present disclosure corresponding to light beams of different wavelengths Detailed implementation manners

[0053] In order to make the technical problems, technical solutions and advantages to be solved by the present disclosure clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments

[0054] To solve the problem that the cathode materials in the prior art cannot meet the transmittance requirements and low resistance requirements of the cathode in organic electroluminescent devices, the embodiment of the present disclosure provides a conductive film layer, which is made of at least one of conductive metal nano-ions, organic network polymers, organic porous polymers and inorganic porous materials. The conductive film layer can be used as the cathode of an organic electroluminescent device. Compared with the cathode made of the conventional Mg / Ag alloy, it can achieve the effect of improving the transmittance of the cathode. In addition, the doped conductive metal nano-ions can further achieve the effect of reducing the cathode resistance

[0055] Optionally, the conductive film layer according to the embodiment of the present disclosure includes a substrate and conductive metal nano-ions distributed in the substrate; the substrate is at least one of an organic network polymer, an organic porous polymer and an inorganic porous material

[0056] In one embodiment of the present disclosure, when the substrate is an organic network polymer or an organic porous polymer, the substrate and the conductive metal nano-ions are chelated and connected through a coordination bond

[0057] When the substrate is an inorganic porous material, the substrate and the conductive metal nano-ions are coordinately connected through intermolecular forces, such as through van der Waals forces

[0058] In one embodiment, when the substrate is an organic network polymer or an organic porous polymer, the organic material is synthesized into an organic polymer material by a conventional solution preparation method. The network structure and organic porous structure of the organic polymer material have sites for binding to metals and nano-scale pores, and are combined and bonded with a conductive metal through a high-temperature solution method to obtain an organic-metal composite material, that is, the conductive film layer in the embodiments of the present disclosure, so as to be used for manufacturing the cathode of an organic light-emitting device, and solve the problem that the cathode materials in the prior art cannot meet the transmittance requirements and low-resistance requirements of the cathode.

[0059] Optionally, the conductive metal nano-ions include at least one of Ag, Mg, Cu, Au, and Al.

[0060] Optionally, the specific surface area of the substrate on which the conductive metal nano-ions are distributed is at least greater than 150 m 2 / g.

[0061] In the embodiments of the present disclosure, optionally, the specific surface area of the substrate before loading the metal nano-ions can reach 625 m 2 / g. After loading the metal nano-ions, the specific surface area slightly decreases and can reach 410 m 2 / g, and the pore volume is 0.46 cm 3 / g.

[0062] Optionally, the conductive metal nano-ions are uniformly distributed in the matrix, and the distribution ratio is between 1% and 70%.

[0063] In one embodiment, optionally, one of the preparation methods of the electrode material for forming the conductive film layer is as Figure 1 shown, including:

[0064] Using the solution preparation method to polymerize the organic monomers into an organic network polymer;

[0065] Chelating the conductive metal nano-ions with the organic network polymer at a preset temperature to form the electrode material.

[0066] Optionally, chelating the conductive metal nano-ions with the organic network polymer at a preset temperature to form the electrode material includes:

[0067] Placing the organic network polymer in a preset solvent;

[0068] After heating the preset solvent to a preset temperature, adding the conductive metal nano-ions, and chelating the conductive metal nano-ions with the organic network polymer in the preset solvent;

[0069] Filtering the preset solvent to obtain the electrode material.

[0070] In the above embodiments, optionally, the organic monomer is selected from substances or materials containing nitrogen or oxygen that can chelate metal ions. For example, carbazole-based substances or thiophene-based substances can be selected as the organic monomer.

[0071] Among them, the organic monomers of the above materials can be polymerized into an organic network polymer by a solution preparation method, as Figure 1 shown.

[0072] Optionally, in order to avoid too high a molecular weight of the generated organic network polymer, a solvent with moderate polarity can be used, that is, the preset solvent is a solvent with moderate polarity, heated to a preset temperature, so that the conductive metal nano-ions and the organic network polymer undergo a high-temperature thermal reaction in the preset solvent, and the conductive metal nano-ions and the organic network polymer are chelated in the preset solvent. After filtering the preset solvent and vacuum-drying the obtained material to remove the adsorbed solvent, the electrode material is obtained.

[0073] Optionally, the preset solvent can be selected from at least one of solvents such as dimethyl sulfoxide, dimethylformamide, chloroform, toluene, isopropanol, and acetonitrile.

[0074] In the electrode material prepared by the above preparation method, the doping ratio of the conductive metal nano-ions in the organic network polymer is between 1% and 25%. Since the selection of the organic polymer and the conductive metal nano-ions has a great influence on the doping ratio, by selecting different organic polymers and conductive metal nano-ions, the doping ratio of the conductive metal nano-ions in the organic network polymer can be adjusted to be between 1% and 25%.

[0075] In another embodiment of the present disclosure, optionally, one of the preparation methods of the electrode material for forming the conductive film layer is as Figure 2 shown, including:

[0076] Chelate the conductive metal nano-ions with the organic monomer to obtain a chelated metal;

[0077] Place the chelated metal in a preset solvent to cause the organic monomers in the chelated metal to polymerize to form an organic network polymer, and obtain the electrode material.

[0078] Optionally, the conductive metal nano-ions can be chelated with the organic monomer by a solvothermal method to obtain a chelated metal. On this basis, a suitable preset solvent is selected to cause the monomers of the chelated metal to polymerize to form an organic network polymer, and then the preset solvent is filtered, and the electrode material obtained by filtering the preset solvent is vacuum-dried to obtain the electrode material for cathode preparation.

[0079] Optionally, the preset solvent needs to have good solubility, that is, it can dissolve the monomer well, such as at least one of dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF), isopropanol and other highly polar solvents.

[0080] Among them, the polymerization is carried out in a solvent-thermal manner, that is, the high molecular polymer is polymerized in an ampoule filled with inert gas, and nano-ion loading is performed after the polymer is obtained.

[0081] In this embodiment, by selecting specific organic monomers to chelate with conductive metal nano-ions, a greater doping ratio of conductive metal nano-ions can be obtained compared to the first embodiment, so that the doping ratio of conductive metal nano-ions in the organic network polymer is between 20% and 70%.

[0082] In the above embodiments of the present disclosure, the preparation method of the electrode material is illustrated by taking the organic network polymer as the matrix of the electrode material. Similarly, an electrode material including an organic porous polymer and conductive metal nano-ions can also be prepared by chelating coordination bonds.

[0083] In the embodiment of the present disclosure, optionally, the organic network polymer and the organic porous polymer respectively include covalent organic framework (COF) materials.

[0084] It should be noted that, because the chelated metal will affect the polymerization molecular weight of the monomer, when the molecular weight of the selected organic monomer is large, the above-mentioned method of the present disclosure can be used. Figure 1 When the molecular weight of the selected organic monomer is small, the electrode material can be prepared by using the above-mentioned method of the present disclosure. Figure 2 The illustrated embodiment prepares electrode materials.

[0085] It should be noted that a high molecular weight generally refers to a molecular weight greater than 10,000 and less than 20,000; a low molecular weight generally refers to a molecular weight greater than 5,000 and less than 8,000.

[0086] In the embodiment of the present disclosure, the conductive metal nano-ions combined with the organic monomer to form the electrode material can be selected from at least one of Ag, Mg, Cu, Au and Al, and specifically, nano-ions of one or a mixture of at least two of them can be selected.

[0087] It should be noted that the conductive film layer described in the embodiment of the present disclosure, the matrix carrying the conductive metal nano-ions is not limited to the above-mentioned organic network polymer or organic porous polymer, such as organic network polymers and porous polymers with bone-like structures, and can also be inorganic porous materials. For example, it can be graphene materials, etc.

[0088] For the conductive film layer adopting this embodiment, a matrix of organic network polymer, organic porous polymer or inorganic porous material, and a conductive film layer made by polymerizing conductive metal nano-ions, by utilizing the network or porous material characteristics of the matrix, compared with the cathode made of the conventional Mg / Ag alloy, the effect of improving the cathode transmittance can be achieved. In addition, by using the doped conductive metal nano-ions, the effect of further reducing the cathode resistance can be achieved.

[0089] As Figure 13 shown, the transmittance of the conductive film layer described in the embodiment of the present disclosure is compared with the cathode of the metal composite film structure made of the conventional Mg / Ag alloy. The conductive film layer adopting the structure of the present disclosure has obvious advantages in light transmittance, and reduces the light absorption in the long wavelength direction.

[0090] On the other hand, the embodiment of the present disclosure also provides an organic electroluminescent device, including an anode and a light-emitting functional layer. Among them, it further includes a conductive film layer with the above-mentioned implementation structure. The conductive film layer is formed as a cathode and is disposed opposite to the anode, and the light-emitting functional layer is located between the conductive film layer and the anode.

[0091] By adopting the organic electroluminescent device described in the embodiment of the present disclosure, through the cathode formed by the conductive film layer in the embodiment of the present disclosure, compared with the cathode made of the conventional Mg / Ag alloy, the effect of improving the cathode transmittance can be achieved, and by using the doped conductive metal nano-ions, the effect of further reducing the cathode resistance can be achieved, thereby solving the problem that the cathode materials in the prior art cannot meet the requirements of the cathode transmittance and the requirements of lower resistance.

[0092] As Figure 3 shown is a schematic cross-sectional structure diagram of the organic electroluminescent device described in the embodiment of the present disclosure. The organic electroluminescent device includes an anode 100, a light-emitting functional layer 200, and a cathode 300 arranged in sequence; among them, the cathode 300 is also the conductive film layer in the above-mentioned implementation structure of the present disclosure.

[0093] Specifically, the conductive film layer includes a substrate and conductive metal nano-ions distributed in the substrate, and the substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material.

[0094] In the embodiment of the present disclosure, for the conductive film layer made into the cathode 300, the thickness of the substrate is between 30 nanometers and 50 nanometers.

[0095] The following table shows the comparison parameters of the surface resistance of the cathode made of the metal composite film of the conventional Mg / Ag alloy and the conductive film layer, that is, the organic metal nano-film, in the embodiment of the present disclosure.

[0096]

[0097] Since the transmittance and resistance are different when the conductive film layer has different thicknesses, considering the influence of transmittance and resistance, optionally, when the conductive metal nanoparticles in the substrate include Ag and / or Mg, the thickness of the substrate is between 40 nanometers and 50 nanometers.

[0098] In addition, in the organic electroluminescent device, as Figure 3 shown, in the direction from the anode 100 to the cathode 300, the light-emitting functional layer 200 sequentially includes a hole injection layer 210, a hole transport layer 220, a light-emitting layer 230, and an electron transport layer 240. Among them, the cathode 300 (i.e., the conductive film layer) is connected to the electron transport layer 240. Optionally, the electron transport layer 240 is made of an aromatic compound having an electron-withdrawing group of a nitrogen heterocyclic type.

[0099] Optionally, when preparing the organic electroluminescent device, the hole injection layer 210 and the hole transport layer 220 are sequentially formed by evaporation on the substrate on which the anode 100 is formed using an open mask, then the light-emitting layer 230 is formed by evaporation using an FMM, and then the electron transport layer 240 is formed by evaporation using an open mask.

[0100] Optionally, referring to Figure 4 shown, in the organic electroluminescent device, the light-emitting functional layer 200 includes a first light-emitting unit 201 for emitting red light, a second light-emitting unit 202 for emitting green light, and a third light-emitting unit 203 for emitting blue light;

[0101] Among them, the distance between the first film layer portion 310 of the conductive film layer (i.e., the cathode 300) corresponding to the first light-emitting unit 201 and the anode 100 is greater than the distance between the second film layer portion 320 of the conductive film layer corresponding to the second light-emitting unit 202 and the anode 100;

[0102] The distance between the second film layer portion 320 of the conductive film layer corresponding to the second light-emitting unit 202 and the anode 100 is greater than the distance between the third film layer portion 330 of the conductive film layer corresponding to the third light-emitting unit 203 and the anode 100.

[0103] Based on this embodiment, the hole injection layer 210, the hole transport layer 220, and the electron transport layer 240 corresponding to different light-emitting units and the cathode 300 are common layers for multiple light-emitting units, and for different light-emitting units, these layers can be made in the same process. For the light-emitting layer 230 corresponding to different light-emitting units, the light-emitting layer 230 of the same color can be made by the same evaporation process, and the light-emitting layer 230 of different colors is made by different evaporation processes.

[0104] Optionally, in the embodiments of the present disclosure, the conductive film layer, i.e., the cathode 300, is formed by evaporation or spin coating.

[0105] In the embodiments of the present disclosure, as Figure 14 shown, when the conductive film layer of the above-described implementation structure is prepared by spin coating as the cathode, the transmittance of light corresponding to different wavelengths.

[0106] Optionally, the conductive film layer, i.e., the cathode 300, is a light-transmitting layer. The transmittance corresponding to red light is between 63% and 69%, the transmittance corresponding to green light is between 67% and 73%, and the transmittance corresponding to blue light is between 73% and 77%.

[0107] On the other hand, the embodiments of the present disclosure also provide a display device including the organic electroluminescent device with the above-described implementation structure.

[0108] As Figure 5 shown, it is a schematic cross-sectional structure diagram of the display device according to one embodiment of the present disclosure. The display device in this embodiment includes:

[0109] An array substrate 310 and a plurality of light-emitting units 320 fabricated on the array substrate, wherein the plurality of light-emitting units constitute an organic electroluminescent device.

[0110] Each light-emitting unit 320 includes a first electrode 321, a light-emitting functional layer 322 disposed on a side of the first electrode 321 away from the array substrate 310, and a second electrode 323 disposed on a side of the light-emitting functional layer 322 away from the first electrode 321.

[0111] Optionally, the light-emitting unit further includes a pixel defining layer 324 disposed on the first electrode 321, and the light-emitting functional layer 322 is disposed in the pixel defining layer 324.

[0112] Among them, the first electrode 321 is connected to the source / drain layer of the array substrate 310 through a via hole. A driving voltage is input to the first electrode 321 through a driving circuit on the array substrate 310. By using the voltage difference between the first electrode 321 and the second electrode 323, the light-emitting functional layer 322 can be driven to emit light.

[0113] In the embodiments of the present disclosure, optionally, the first electrode 321 is an anode and the second electrode 323 is a cathode. The light-emitting functional layer 322 includes a hole injection layer, a hole transport layer, a light-emitting functional layer, an electron transport layer, and an electron injection layer disposed in sequence.

[0114] With the display device described in this embodiment, the cathode is formed as the conductive film layer with the above-described implementation structure, the substrate, and the conductive metal nano-ions distributed in the substrate. The substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material. Compared with the cathode made of the conventional Mg / Ag alloy, the transmittance of the cathode can be improved, and the effect of further reducing the cathode resistance can be achieved by using the doped conductive metal nano-ions, thereby solving the problem that the cathode materials in the prior art cannot meet the requirements of the transmittance and the low resistance of the cathode.

[0115] It should be noted that the specific structure of the above display device is only for illustrative purposes and is not limited thereto specifically.

[0116] On the other hand, an embodiment of the present disclosure further provides a method for fabricating a cathode of an organic electroluminescent device using an electrode material. The electrode material includes a substrate and conductive metal nano-ions distributed in the substrate; the substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material. Wherein, the method includes:

[0117] By evaporating the electrode material, a cathode is formed on the substrate to be made into a cathode; or

[0118] By spin-coating the electrode material on the substrate to be made into a cathode, a cathode is formed.

[0119] In one implementation, optionally, as Figure 6 shown, when fabricating the cathode of the organic electroluminescent device, the substrate 1 to be made into a cathode is placed in the vacuum chamber 2. The vacuum chamber 2 is also provided with an evaporation crucible 3. The evaporation crucible 3 contains the electrode material described above in the embodiment of the present disclosure. The electrode material in the evaporation crucible 3 is heated by the heating source 4 to evaporate the electrode material. Through the mask plate 5, the evaporated electrode material is deposited on the substrate 1 to be made into a cathode, thereby forming the required pattern on the substrate 1 to form a cathode.

[0120] Using the method of this implementation, compared with the cathode in the form of a metal composite film structure made of Mg / Ag alloy, the transmittance of the cathode can be effectively improved. At the same time, as the metal chelation ratio in the electrode material increases, the Rs resistance of the cathode can be reduced, and the film-forming property is ensured to be better than that of the metal film-forming property.

[0121] Optionally, in the embodiment of the present disclosure, the conductive metal nano-ions in the electrode material include bimetals or multi-metals to reduce the electron injection barrier.

[0122] In another implementation of the method described in the embodiment of the present disclosure, a cathode is formed by spin-coating the electrode material on the substrate to be made into a cathode.

[0123] As Figure 7As shown in the figure, in this embodiment, the substrate 1 to be made into a cathode is disposed on a rotatable base 6, and an outlet pipe 7 for the electrode material is disposed above the base 6; through this outlet pipe 7, the electrode material can be input onto the substrate 1 located on the base 6. By the high-speed rotation of the base 6, the electrode material deposited on the substrate 1 is uniformly formed into a film, and then by the rotation of the base 6, the excess solution of the electrode material deposited on the substrate 1 is spun off, and further the solvent on the substrate 1 is volatilized, and finally the required cathode is made on the substrate 1.

[0124] Adopting this embodiment can particularly be applicable to the full-surface spin coating of the cathode on a large-size panel, and has the effects of shortening the mass production time and improving the production capacity.

[0125] In the display device described in the embodiments of the present disclosure, by analyzing the SEM spectrum of the electrode material, as Figure 8a and Figure 8b shown, observing the surface morphology characteristics of the material, it can be clearly seen that the cross-linked characteristics of the material; in addition, according to Figure 9 shown by observing the TEM spectrum of the prepared material, obvious pore structures can be seen, and by using these pore structures, the best light transmission effect of the made cathode can be ensured.

[0126] Furthermore, taking the conductive metal nano-ions including Ag as an example, when the prepared electrode material is analyzed by X-ray photoelectron spectroscopy, as Figure 10 shown, the characteristic peak of Ag is near 368 eV, and it can be seen that there is chelated nano-Ag on the electrode material. By using the chelated nano-Ag, the effect of further reducing the cathode resistance can be achieved.

[0127] In addition, when using the above electrode material to prepare a cathode by evaporation coating, the SEM spectrum of the single-layer film of the prepared cathode is as Figure 11 shown, and it can be seen that a dense thin film is formed after the material is evaporated. Through experiments, it is proved that the sheet resistance of the formed cathode is less than 10 ohms, and the transmittance can be greater than or equal to 70%. Compared with the prior art, the problems that the cathode material cannot meet the requirements of higher transmittance and lower resistance can be solved.

[0128] On the other hand, the embodiments of the present disclosure also provide a method for manufacturing an electrode material, as Figure 12 shown, the method includes:

[0129] S1201, providing conductive metal nano-ions and material monomers;

[0130] S1202, using the material monomers and the conductive metal nano-ions to manufacture an electrode material including a substrate and conductive metal nano-ions distributed in the substrate;

[0131] Among them, the substrate is at least one of an organic network polymer, an organic porous polymer, and an inorganic porous material.

[0132] Optionally, in one embodiment, the manufacturing method combines Figure 1 As shown, the material monomer is an organic monomer. In step S1202, manufacturing an electrode material including a substrate and conductive metal nano-ions distributed in the substrate includes:

[0133] Forming an organic network polymer from the organic monomer;

[0134] Chelating the conductive metal nano-ions with the organic network polymer at a preset temperature to form the electrode material.

[0135] Optionally, the organic monomer is selected from substances or materials containing nitrogen or oxygen chelating metal ions. For example, carbazole substances or thiophene substances can be selected as the organic monomer.

[0136] Optionally, in the manufacturing method, chelating the conductive metal nano-ions with the organic network polymer at a preset temperature to form the electrode material includes:

[0137] Placing the organic network polymer in a preset solvent;

[0138] After heating the preset solvent to the preset temperature, adding the conductive metal nano-ions to chelate the conductive metal nano-ions with the organic network polymer in the preset solvent;

[0139] Filtering the preset solvent and vacuum-drying the electrode material obtained by filtering the preset solvent to obtain the electrode material.

[0140] Optionally, the preset solvent can be selected from at least one of solvents such as dimethyl sulfoxide, dimethylformamide, chloroform, toluene, isopropanol, and acetonitrile.

[0141] In another embodiment of the manufacturing method described in the embodiments of the present disclosure, combining Figure 2 As shown, the material monomer is an organic monomer. In step S1202, manufacturing an electrode material including a substrate and conductive metal nano-ions distributed in the substrate includes:

[0142] Chelating the conductive metal nano-ions with the organic monomer to obtain a chelated metal;

[0143] Placing the chelated metal in a preset solvent to cause the organic monomers in the chelated metal to polymerize to form an organic network polymer to obtain the electrode material.

[0144] Optionally, after the chelating metal is placed in a preset solvent and the organic monomers in the chelating metal polymerize to form an organic network polymer, the method further includes:

[0145] Filter the preset solvent, and vacuum dry the electrode material obtained by filtering the preset solvent.

[0146] The method for manufacturing the electrode material according to the embodiments of the present disclosure can be combined with Figure 1 and Figure 2 , and refer to the above detailed description, and will not be elaborated herein.

[0147] In the method according to the embodiments of the present disclosure, an organic monomer is formed into a polymer with a moderate molecular weight by a solution preparation method, and then metal nano-ions are bonded to the organic material by a chelating method, and then used as a cathode evaporation material; the selection of the organic material, the selection of metal ions, and the doping ratio of metal ions can all be adjusted, while improving the cathode transmittance, achieving the effect of reducing the cathode resistance. By using the preparation method according to the embodiments of the present disclosure, the obtained electrode material has good film-forming properties and conductivity, and the film layer transmittance has obvious advantages over the metal composite film.

[0148] The above are the preferred embodiments of the present disclosure. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present disclosure, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present disclosure.

Claims

1. A conductive film layer, wherein, It includes a substrate and conductive metal nano-ions distributed in the substrate; the substrate is at least one of an organic network polymer and an organic porous polymer; the conductive metal nano-ions are uniformly distributed in the substrate, and the distribution ratio is between 1% and 70%; wherein, when the conductive metal nano-ions in the substrate include Ag and / or Mg, the thickness of the substrate is between 40 nanometers and 50 nanometers; Wherein, the conductive film layer is formed as the cathode of the organic electroluminescent device, the transmittance corresponding to red light is between 63% and 69%, the transmittance corresponding to green light is between 67% and 73%, and the transmittance corresponding to blue light is between 73% and 77%; The conductive film layer is made by polymerizing an organic monomer into an organic polymer with a porous structure or a network structure by a solution preparation method, placing the organic polymer in a first preset solvent, heating the first preset solvent to a preset temperature, and then adding conductive metal nano-ions to chelate the conductive metal nano-ions with the organic polymer in the first preset solvent. The organic monomer is a substance or material including nitrogen or oxygen containing a chelating metal ion; the first preset solvent includes at least one of dimethyl sulfoxide, dimethylformamide, chloroform, toluene, isopropanol and acetonitrile; or, the conductive film layer is formed by polymerizing an organic monomer in a chelating metal placed in a second preset solvent; wherein, the chelating metal is made by chelating the conductive metal nano-ions with an organic monomer; the second preset solvent includes dimethyl sulfoxide DMSO, N,N-dimethylformamide DMF or isopropanol.

2. The conductive film layer according to claim 1, wherein, The specific surface area of the substrate distributing the conductive metal nano-ions is greater than 150 m 2 / g.

3. The conductive film layer according to claim 1, wherein When the substrate is an organic network polymer or an organic porous polymer, the substrate and the conductive metal nano-ions are chelated and connected through a coordination bond.

4. The conductive film layer according to claim 1, wherein, The conductive metal nano-ions include at least one of Ag, Mg, Cu, Au and Al.

5. The conductive film layer according to claim 1, wherein The organic network polymer and the organic porous polymer respectively include covalent organic framework COF materials.

6. An organic electroluminescent device includes an anode and a light-emitting functional layer, wherein, It further includes the conductive film layer according to any one of claims 1 to 5. The conductive film layer is formed as the cathode, is disposed opposite to the anode, and the light-emitting functional layer is located between the conductive film layer and the anode.

7. The organic electroluminescent device according to claim 6, wherein, The light-emitting functional layer includes an electron transport layer. The conductive film layer is connected to the electron transport layer, and the electron transport layer is made of an aromatic compound having an electron-withdrawing group of a nitrogen heterocycle.

8. The organic electroluminescent device according to claim 6, wherein, The light-emitting functional layer includes a first light-emitting unit for emitting red light, a second light-emitting unit for emitting green light, and a third light-emitting unit for emitting blue light; Wherein, the distance between the first film layer portion of the conductive film layer corresponding to the first light-emitting unit and the anode is greater than the distance between the second film layer portion of the conductive film layer corresponding to the second light-emitting unit and the anode; The distance between the second film layer portion of the conductive film layer corresponding to the second light-emitting unit and the anode is greater than the distance between the third film layer portion of the conductive film layer corresponding to the third light-emitting unit and the anode.

9. The organic electroluminescent device according to claim 6, wherein, The conductive film layer is made by evaporation coating or spin coating.

10. A display device, wherein, An organic electroluminescent device according to any one of claims 6 to 9.

11. A method for manufacturing an electrode material, wherein, The method includes: Providing conductive metal nano-ions and material monomers; Using the material monomers and the conductive metal nano-ions to fabricate an electrode material including a substrate and the conductive metal nano-ions distributed in the substrate; wherein the substrate is at least one of an organic network polymer and an organic porous polymer; Wherein, using the material monomers and the conductive metal nano-ions to fabricate an electrode material including a substrate and the conductive metal nano-ions distributed in the substrate includes: Preparing an organic polymer with a porous structure or a network structure from an organic monomer by a solution preparation method; Chelating the conductive metal nano-ions with the organic polymer having a porous structure or a network structure at a preset temperature to form the electrode material; or Wherein, using the material monomers and the conductive metal nano-ions to fabricate an electrode material including a substrate and the conductive metal nano-ions distributed in the substrate includes: Chelating the conductive metal nano-ions with an organic monomer to form a chelated metal; Placing the chelated metal in a second preset solvent, and polymerizing the organic monomers in the chelated metal to form the electrode material; the second preset solvent includes dimethyl sulfoxide (DMSO), N,N-dimethylformamide (DMF), or isopropanol; Wherein, the conductive metal nano-ions are uniformly distributed in the substrate, and the distribution ratio is between 1% and 70%; wherein, when the conductive metal nano-ions in the substrate include Ag and / or Mg, the thickness of the substrate is between 40 nanometers and 50 nanometers; The electrode material is used to fabricate the cathode of an organic electroluminescent device, and the transmittance of the cathode corresponding to red light is between 63% and 69%, the transmittance corresponding to green light is between 67% and 73%, and the transmittance corresponding to blue light is between 73% and 77%; Wherein, chelating the conductive metal nano-ions with the organic polymer having a porous structure or a network structure at a preset temperature to form the electrode material includes: Placing the organic polymer in a first preset solvent; After heating the first preset solvent to the preset temperature, adding the conductive metal nano-ions to chelate the conductive metal nano-ions with the organic polymer in the first preset solvent; Filtering the first preset solvent, and vacuum-drying the electrode material obtained by filtering the first preset solvent to obtain the electrode material; the organic monomer is a substance or material including nitrogen or oxygen containing chelated metal ions; the first preset solvent includes at least one of dimethyl sulfoxide, dimethylformamide, chloroform, toluene, isopropanol, and acetonitrile.

12. The manufacturing method according to claim 11, wherein, After placing the chelated metal in the second preset solvent and polymerizing the organic monomers in the chelated metal, the method further includes: Filtering the second preset solvent, and vacuum-drying the electrode material obtained by filtering the second preset solvent.

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