CN110289367B - Packaging film layer, display panel and manufacturing method - Google Patents
Packaging film layer, display panel and manufacturing method Download PDFInfo
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- CN110289367B CN110289367B CN201910547593.6A CN201910547593A CN110289367B CN 110289367 B CN110289367 B CN 110289367B CN 201910547593 A CN201910547593 A CN 201910547593A CN 110289367 B CN110289367 B CN 110289367B
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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
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
本发明公开了封装膜层、显示面板及制作方法。该封装膜层包括：封装基板；亲水膜层，亲水膜层设置在封装基板的一侧；疏水膜层，疏水膜层设置在封装基板远离亲水膜层的一侧，亲水膜层和疏水膜层均包括微介孔材料，疏水膜层的微介孔材料远离封装基板一侧的表面具有低表面能物质。亲水膜层可以很好的吸附封装膜层内部残留或产生的水氧，起到很好的干燥作用，疏水膜层可以很好的隔绝外部的水氧，由此，使得该封装膜层具有良好的隔绝水氧的作用，提升应用该封装膜层的有机发光显示面板的使用寿命以及显示品质。
The invention discloses a packaging film layer, a display panel and a manufacturing method. The packaging film layer includes: a packaging substrate; a hydrophilic film layer, the hydrophilic film layer is arranged on one side of the packaging substrate; a hydrophobic film layer, the hydrophobic film layer is arranged on the side of the packaging substrate away from the hydrophilic film layer, and the hydrophilic film layer Both the hydrophobic membrane layer and the hydrophobic membrane layer include micro-mesoporous materials, and the surface of the micro-mesoporous material of the hydrophobic membrane layer on the side away from the packaging substrate has low surface energy substances. The hydrophilic film layer can well absorb the water and oxygen remaining or generated inside the packaging film layer, and has a good drying effect, and the hydrophobic film layer can well isolate the external water and oxygen, so that the packaging film layer has The good function of isolating water and oxygen improves the service life and display quality of the organic light-emitting display panel to which the encapsulation film layer is applied.
Description
Technical Field
The invention relates to the technical field of display, in particular to an encapsulation film layer, a display panel and a manufacturing method.
Background
The organic light emitting display device has the advantages of being light and thin, actively emitting light, wide in visual angle, fast in response, low in energy consumption, excellent in low temperature and shock resistance, capable of realizing flexible display and the like. The cathode of an Organic Light Emitting Device (OLED) in an organic light emitting display device is usually made of a metal material with relatively active chemical properties, and the metal material is easy to react with water and oxygen, and the water and oxygen can also chemically react with an organic material layer and a charge transport layer in the organic light emitting device to influence the normal operation of the organic light emitting device. Therefore, in the current organic light emitting display device, an encapsulation film layer is generally required to encapsulate the organic light emitting device so as to isolate external water and oxygen. However, the inventors found that the current encapsulation film layer still needs to be improved to further improve the service life of the organic light emitting device.
Disclosure of Invention
The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems.
In one aspect of the invention, an encapsulation film layer is provided. The encapsulation film layer includes: a package substrate; a hydrophilic film layer disposed on one side of the package substrate; the hydrophobic membrane layer sets up the packaging substrate is kept away from one side of hydrophilic membrane layer, hydrophilic membrane layer with the hydrophobic membrane layer all includes little mesoporous material, the little mesoporous material of hydrophobic membrane layer is kept away from the surface of packaging substrate one side has low surface energy material. The specific surface area of the micro-mesoporous material is large, make hydrophilic rete have excellent adsorption performance, can adsorb the inside water oxygen that remains or produce of encapsulation rete, play fine drying effect, and the usable surperficial inherent hole of micro-mesoporous material constitutes coarse structure, and cooperate the low surface energy material on micro-mesoporous surface, make hydrophobic rete have excellent hydrophobic property, isolated outside water oxygen that can be fine, therefore, this encapsulation rete infiltration that can be fine on the one hand isolated outside water oxygen, on the other hand can also be fine adsorb inside remaining water oxygen, can effectively promote the life and the demonstration quality of using this organic light emitting display panel who encapsulates the rete.
According to an embodiment of the present invention, the micro mesoporous material includes at least one of silica having a micro or mesoporous structure, titania, and carbon nanotubes. Therefore, the hydrophilic film layer and the hydrophobic film layer can be formed by the materials, and the adsorption performance of the hydrophilic film layer on water and oxygen and the isolation performance of the hydrophobic film layer on water and oxygen are further optimized.
According to the embodiment of the invention, a bonding agent is arranged between the hydrophilic membrane layer and the packaging substrate and between the hydrophobic membrane layer and the packaging substrate. Therefore, the binding force between the hydrophilic film layer and the packaging substrate can be enhanced by utilizing the binder, the binding force between the hydrophobic film layer and the packaging substrate is enhanced, the stability of the structure of the packaging film layer is improved, and the stability of the packaging film layer for isolating water and oxygen is improved.
According to an embodiment of the invention, the binder comprises a substance comprising catechol side chains. The binding agent can obviously enhance the binding force between the hydrophilic film layer and the packaging substrate and obviously enhance the binding force between the hydrophobic film layer and the packaging substrate.
According to an embodiment of the invention, the binder comprises dopamine. Therefore, the dopamine can obviously enhance the binding force between the hydrophilic film layer and the packaging substrate and obviously enhance the binding force between the hydrophobic film layer and the packaging substrate.
According to an embodiment of the present invention, the package substrate includes a rigid substrate or a flexible substrate. From this, this encapsulation rete can be for having certain mechanical strength's encapsulation rete, perhaps can be flexible encapsulation rete for the display panel who uses rigid encapsulation rete or flexible encapsulation rete all has longer life.
In another aspect of the present invention, a display panel is provided. According to an embodiment of the present invention, the display panel includes: a substrate base plate; an organic light emitting device disposed on the substrate base plate; the encapsulation rete, the encapsulation rete be preceding the encapsulation rete, the encapsulation rete with airtight space is injectd to the substrate base plate, organic light emitting device sets up in the airtight space, just hydrophilic rete in the encapsulation rete is close to organic light emitting device sets up. Therefore, the display panel has longer service life and good display quality.
In another aspect of the present invention, a method of fabricating a display panel is provided. According to an embodiment of the invention, the method comprises: disposing an organic light emitting device on a substrate; organic light emitting device keeps away from one side of substrate base plate sets up the encapsulation rete, the encapsulation rete with the substrate base plate prescribes a limit to airtight space, organic light emitting device sets up in the airtight space, the encapsulation rete includes encapsulation base plate, hydrophilic rete and hydrophobic rete, hydrophilic rete sets up one side of encapsulation base plate, hydrophobic rete sets up the encapsulation base plate is kept away from one side of hydrophilic rete, hydrophilic rete with hydrophobic rete all includes little mesoporous material, the little mesoporous material of hydrophobic rete is kept away from the surface of encapsulation base plate one side has low surface energy material. Thus, an organic light emitting display panel having a long life span and good display quality can be obtained using a simple method.
According to an embodiment of the present invention, the hydrophilic film layer is fixed on the package substrate by a binder including a substance having catechol side chain. Therefore, the bonding force between the hydrophilic film layer and the packaging substrate can be obviously enhanced.
According to an embodiment of the present invention, the hydrophobic membrane layer is formed by: fixing a micro-mesoporous material on one side of the packaging substrate far away from the organic light-emitting device by using a binder to form a hydrophobic membrane layer rough blank; and modifying the hydrophobic membrane layer rough blank by using a low-surface-energy substance to obtain the hydrophobic membrane layer, wherein the binder comprises a substance containing catechol side chain. Therefore, the binding force between the hydrophobic membrane layer and the packaging substrate can be obviously enhanced, and the binder is firstly modified and then modified by the low-surface-energy substance, so that the binder can be prevented from generating adverse effects on the water and oxygen isolating effect of the hydrophobic membrane layer.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural diagram of an encapsulation film layer according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present invention;
fig. 3 shows a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the invention.
Description of reference numerals:
100: a package substrate; 200: a hydrophilic film layer; 300: a hydrophobic membrane layer; 400: a substrate base plate; 500: an organic light emitting device; 10: and (4) sealing the space.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In one aspect of the invention, an encapsulation film layer is provided. According to an embodiment of the present invention, referring to fig. 1, the encapsulation film layer includes: the package substrate 100, the hydrophilic film layer 200 and the hydrophobic film layer 300, wherein the hydrophilic film layer 200 is disposed on one side of the package substrate 100, the hydrophobic film layer 300 is disposed on one side of the package substrate 100 away from the hydrophilic film layer 200, the hydrophilic film layer 200 and the hydrophobic film layer 300 both include micro-mesoporous materials, and a surface of one side of the hydrophobic film layer 300 away from the package substrate 100 has a low surface energy substance (not shown in the figure). Hydrophilic rete can be fine adsorb the inside water oxygen that remains or produce of encapsulation rete, plays fine drying effect, and hydrophobic rete can be fine isolated outside water oxygen, from this for this encapsulation rete has the effect of good isolated water oxygen, promotes the life and the display quality of using this organic light emitting display panel who encapsulates the rete.
According to the embodiment of the invention, the micro-mesoporous material has a larger specific surface area, the hydrophilic film layer is formed by the micro-mesoporous material, when water molecules drop on the surface of the hydrophilic film layer, the water drops can be completely spread, the surface of the hydrophilic film layer is fully wetted, the hydrophilic film layer has excellent adsorption performance, and after the organic light-emitting device is encapsulated by the encapsulation film layer, the hydrophilic film layer can be used for adsorbing residual or generated water and oxygen in the encapsulation film layer, so that a good drying effect is achieved on the organic light-emitting device in the encapsulation film layer, and the organic light-emitting device is prevented from being damaged by the water and oxygen in the encapsulation film layer.
According to the embodiment of the invention, the micro-mesoporous material has a large number of pores, a rough structure can be formed by utilizing the pores inherent to the surface of the micro-mesoporous material, and a low surface energy substance is arranged on the surface of the micro-mesoporous material to form a super-hydrophobic structure similar to lotus leaves. When water molecules drop on the surface of the hydrophobic membrane layer, the contact angle between the water drops and the hydrophobic membrane layer is larger than 150 degrees due to the rough structure and the low-surface-energy substance on the surface of the rough structure, so that the water drops cannot wet the hydrophobic membrane layer and further cannot permeate into the packaging membrane layer. Namely: the hydrophobic film layer has excellent hydrophobic performance, external water and oxygen can be well isolated, and the organic light-emitting device in the packaging film layer is prevented from being damaged by the external water and oxygen. The hydrophobic membrane layer can form a rough structure by utilizing the inherent pores on the surface of the micro-mesoporous material, namely, the rough structure is not additionally arranged on the surface of the material, and only a low surface energy substance needs to be formed on the surface of the micro-mesoporous material when the hydrophobic membrane layer is manufactured, so that the difficulty of the preparation process is obviously reduced, and the production cost is reduced.
From this, this encapsulation rete has combined the characteristics of hydrophilic rete and hydrophobic rete simultaneously, and the infiltration of isolated outside water oxygen that on the one hand can be fine, and on the other hand can also be fine adsorb inside water oxygen that remains or produce to carry out stricter control to water oxygen permeability, thereby can effectively promote the life and the display quality of using this organic light emitting display panel who encapsulates the rete.
The following describes the structure of the encapsulation film layer in detail according to the specific embodiment of the present invention:
the specific type of the mesoporous material is not particularly limited, so long as the mesoporous material has a large specific surface area and the pores of the mesoporous material can be used to form the coarse structure of the hydrophobic membrane layer, and the mesoporous material can be designed by those skilled in the art according to specific situations. For example, according to an embodiment of the present invention, the micro mesoporous material may include at least one of silica having a micro or mesoporous structure, titania, and carbon nanotubes. Therefore, the hydrophilic film layer and the hydrophobic film layer can be formed by the materials, and the adsorption performance of the hydrophilic film layer on water and oxygen and the isolation performance of the hydrophobic film layer on water and oxygen are further optimized.
The specific size of the pores of the microporous material and the mesoporous material is not particularly limited, as long as the microporous material and the mesoporous material have a large specific surface area, and the pores can be used to form a coarse structure of the hydrophobic membrane layer, and those skilled in the art can design the pores according to specific situations. And pore diameters of different sizes can be obtained by adjusting preparation conditions.
According to the embodiment of the present invention, the active surface of the micro mesoporous material may also adsorb organic molecules, and thus, contamination of the organic light emitting device by the organic molecules inside the encapsulation film layer may be prevented.
According to the embodiment of the invention, the bonding agent is disposed between the hydrophilic film layer 200 and the package substrate 100, and between the hydrophobic film layer 300 and the package substrate 100. Therefore, the bonding force between the hydrophilic film layer and the packaging substrate can be enhanced, the bonding force between the hydrophobic film layer and the packaging substrate is enhanced, the stability of the packaging film layer structure is improved, and the stability of the packaging film layer for isolating water and oxygen is improved. According to an embodiment of the present invention, the adhesive may contain a hydrophilic group, and the hydrophilic film layer and the encapsulation substrate are firmly bonded through the hydrophilic group, and the hydrophobic film layer and the encapsulation substrate are firmly bonded through the hydrophilic group.
The specific composition of the binder is not particularly limited, as long as the hydrophilic film layer and the hydrophobic film layer are firmly bonded to the package substrate by the binder, respectively, and those skilled in the art can design the binder according to specific situations. For example, according to embodiments of the present invention, the binder may include a material containing catechol side chains. On one hand, the micro-mesoporous material has a larger specific surface area and can absorb hydroxyl on a catechol side chain, so that the adhesive is well adhered to the micro-mesoporous material, and on the other hand, the hydroxyl on the catechol side chain can be combined with the packaging substrate, so that the adhesive is well adhered to the packaging substrate, and the hydrophilic film layer and the hydrophobic film layer can be attached to the packaging substrate in a stronger manner.
And the inventors found that the above-mentioned catechol side chain-containing substance is not selective for a specific material of the encapsulation substrate. In other words, whether the package substrate is made of an inorganic material or an organic material, the hydroxyl group on the side chain of the catechol can be bonded with the package substrate, so that the package film layer has a wide application range.
According to the embodiment of the present invention, the hydrophilic film 200 may have the above-mentioned binder on the rest of the hydrophilic film 200, in addition to the surface thereof contacting the package substrate 100, and since the hydroxyl group on the catechol side chain is a hydrophilic group, the adsorption capacity of the hydrophilic film to water and oxygen may be further improved.
According to a specific embodiment of the present invention, the binder may include dopamine. The inventor finds that dopamine can be attached to rocks and ship hulls strongly, so that the bonding force between the hydrophilic film layer and the packaging substrate can be enhanced remarkably by utilizing the dopamine, the bonding force between the hydrophobic film layer and the packaging substrate can be enhanced remarkably, and the stability of the structure of the packaging film layer and the stability of the packaging film layer for isolating water and oxygen are improved.
According to an embodiment of the present invention, the package substrate 100 may include a rigid substrate or a flexible substrate. From this, this encapsulation rete can be for having certain mechanical strength's encapsulation rete, perhaps can be flexible encapsulation rete for the display panel who uses rigid encapsulation rete or flexible encapsulation rete all has longer life. And the adhesive (such as dopamine) containing the catechol side chain has stronger attaching capacity to the rigid substrate or the flexible substrate, so that stronger binding force can be provided between the hydrophilic film layer and the substrate and between the hydrophobic film layer and the substrate.
Specific materials for the package substrate are not particularly limited, and those skilled in the art can design the package substrate according to specific situations. For example, the package substrate 100 may be a glass substrate, or a Polyimide (PI) substrate.
In another aspect of the present invention, a display panel is provided. According to an embodiment of the present invention, referring to fig. 2, the display panel includes: the organic light emitting diode package structure comprises a substrate base plate 400, an organic light emitting diode 500 and a package film layer, wherein the organic light emitting diode 500 is arranged on the substrate base plate 400, the package film layer is the package film layer described above, namely the package film layer comprises a hydrophilic film layer 200, a package base plate 100 and a hydrophobic film layer 300, the package film layer and the substrate base plate 400 define a closed space 10, the organic light emitting diode 500 is arranged in the closed space 10, and the hydrophilic film layer 200 is arranged close to the organic light emitting diode 500. Thus, the display panel has all the features and advantages of the encapsulation film layer described above, and overall, the display panel has a long service life and good display quality. Specifically, the hydrophilic film layer 200 can well adsorb residual or generated water and oxygen inside the encapsulation film layer (i.e., inside the enclosed space 10), and the hydrophobic film layer 300 can well isolate the water and oxygen outside the encapsulation film layer, so as to significantly reduce the adverse effect of the water and oxygen on the organic light emitting device.
As is well known to those skilled in the art, the organic light emitting device 500 may include structures such as an anode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, a cathode, etc. to achieve the use function of the organic light emitting device.
According to an embodiment of the present invention, a binder is disposed between the hydrophilic film layer 200 and the package substrate 100, and between the hydrophobic film layer 300 and the package substrate 100, and the binder includes a substance having a catechol side chain. Therefore, the bonding force between the hydrophilic film layer and the packaging substrate can be enhanced by utilizing the bonding agent, the bonding force between the hydrophobic film layer and the packaging substrate is enhanced, the stability of the structure of the packaging film layer is improved, and the stability of the packaging film layer for isolating water and oxygen is improved.
According to an embodiment of the invention, the binder may comprise a material comprising catechol side chains. On one hand, the micro-mesoporous material has a larger specific surface area and can absorb hydroxyl on a catechol side chain, so that the adhesive is well adhered to the micro-mesoporous material, and on the other hand, the hydroxyl on the catechol side chain can be combined with the packaging substrate, so that the adhesive is well adhered to the packaging substrate, and the hydrophilic film layer and the hydrophobic film layer can be attached to the packaging substrate in a stronger manner.
According to the embodiment of the invention, the whole surface of the hydrophilic film layer can be provided with the binder, the catechol side chain contains hydroxyl, and the hydroxyl is taken as a hydrophilic group, so that the adsorption capacity of the hydrophilic film layer can be further enhanced, and the adverse effect of water and oxygen on the organic light-emitting device can be further reduced.
In another aspect of the present invention, a method of fabricating a display panel is provided. According to an embodiment of the present invention, the display panel manufactured by the method may be the display panel described above, and thus, the display panel manufactured by the method may have the same features and advantages as the display panel described above, and will not be described herein again.
According to an embodiment of the invention, referring to fig. 3, the method comprises:
s100: providing an organic light emitting device on a substrate
In this step, an organic light emitting device is disposed on a base substrate. As described above, the organic light emitting device may include a structure such as an anode, a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, a cathode, etc., and a method of forming the same is not particularly limited, and may be designed by those skilled in the art according to circumstances.
S200: arranging a packaging film layer on one side of the organic light-emitting device far away from the substrate
In this step, an encapsulation film layer is disposed on a side of the organic light emitting device away from the substrate base plate. According to the embodiment of the invention, the packaging film layer comprises a hydrophilic film layer, a packaging substrate and a hydrophobic film layer which are sequentially stacked, the hydrophilic film layer and the hydrophobic film layer both comprise micro-mesoporous materials, and the surface of one side, far away from the packaging substrate, of the micro-mesoporous materials of the hydrophobic film layer is provided with low-surface-energy substances. Therefore, the micro mesoporous material has a larger specific surface area, so that the hydrophilic film layer has excellent adsorption performance, the micro mesoporous material can form a rough structure by utilizing the inherent pores on the surface of the micro mesoporous material, and the hydrophobic film layer has excellent performance of isolating water and oxygen by matching with the low surface energy substance on the surface, and the adverse effect of the water and oxygen on the organic light-emitting device can be obviously reduced.
The specific type of the mesoporous material has been described in detail above, and will not be described herein again.
According to the embodiment of the invention, the encapsulation film layer and the substrate base plate define a closed space, the organic light-emitting device is arranged in the closed space, and the hydrophilic film layer in the encapsulation film layer is arranged close to the organic light-emitting device, so that the adverse effect of water and oxygen on the organic light-emitting device can be effectively reduced by utilizing the encapsulation film layer.
According to an embodiment of the present invention, the hydrophilic film layer in the encapsulation film layer is fixed on the encapsulation substrate by an adhesive, and the adhesive may include a substance containing catechol side chain. Therefore, the bonding force between the hydrophilic film layer and the packaging substrate can be obviously enhanced. Specifically, a solution soaking method can be used to form a binder on the surface of the mesoporous material, and then the mesoporous material with the binder on the surface is disposed on the package substrate, and the mesoporous material is firmly bonded to the package substrate through the binder. The whole surface of the micro-mesoporous material can be provided with the binder by a solution soaking method, the catechol side chain contains hydroxyl, and the hydroxyl is used as a hydrophilic group to further enhance the adsorption capacity of the hydrophilic film layer, further prolong the service life of the display panel and improve the display quality
According to the embodiment of the invention, the micro mesoporous material has a larger specific surface area, can adsorb hydroxyl on a catechol side chain, so that the adhesive is well adhered to the micro mesoporous material, and the hydroxyl on the catechol side chain can be combined with the packaging substrate, so that the adhesive can be well adhered to the packaging substrate, a hydrophilic film layer can be firmly adhered to the packaging substrate, and the stability of the packaging film layer is improved.
According to an embodiment of the present invention, the hydrophobic film layer in the encapsulation film layer may be formed by: firstly, fixing a micro-mesoporous material on one side of a packaging substrate far away from an organic light-emitting device by using a binder to form a hydrophobic membrane layer rough blank, and then modifying the hydrophobic membrane layer rough blank by using a low-surface-energy substance to obtain a hydrophobic membrane layer, wherein the binder can comprise a substance containing a catechol side chain. Therefore, the binding force between the hydrophobic membrane layer and the packaging substrate can be obviously enhanced, the hydrophobic membrane layer rough blank is fixed on the packaging substrate firstly, then the modification of the low surface energy substance is carried out, and the adverse effect of the binder on the water and oxygen isolation effect of the hydrophobic membrane layer can be prevented.
According to the embodiment of the invention, firstly, a binder is utilized to fix a micro-mesoporous material on a packaging substrate to form a hydrophobic membrane layer rough blank, the micro-mesoporous material has a larger specific surface area and can adsorb hydroxyl on a catechol side chain, so that the binder is well adhered on the micro-mesoporous material, and the hydroxyl on the catechol side chain can be combined with the packaging substrate, so that the binder is well adhered on the packaging substrate, and thus the hydrophobic membrane layer rough blank and the packaging substrate can be firmly combined, and then the hydrophobic membrane layer rough blank is modified by a low surface energy substance to ensure that the exposed surface of the hydrophobic membrane layer rough blank is completely modified by the low surface energy substance to obtain a hydrophobic membrane layer, so that the surface energy of the hydrophobic membrane layer is reduced, and the hydrophobic membrane layer has excellent hydrophobic performance.
The specific composition of the low surface energy substance is not particularly limited as long as the hydrophobic film layer can have excellent hydrophobic properties, and those skilled in the art can design it as the case may be. For example, according to an embodiment of the present invention, the low surface energy substance may include long-chain alkane, siloxane, fluorine-containing silane, and the like, and the low surface energy substance may include a functional group such as hydroxyl, carboxyl, or amino, and when the mesoporous material is modified, the functional group may react with the rough surface of the mesoporous material to achieve chemical bonding, so as to enhance the bonding force between the low surface energy substance and the mesoporous material.
The specific manner of modifying the mesoporous material with the low surface energy substance is not particularly limited, and those skilled in the art can design the mesoporous material according to specific situations. For example, according to the embodiment of the present invention, the mesoporous material may be modified by a solution immersion method or a vapor deposition method.
The specific manner of disposing the encapsulation film layer is not particularly limited, and those skilled in the art can design the encapsulation film layer according to specific situations. For example, according to some embodiments of the present invention, the organic light emitting device may be packaged by first forming a hydrophobic film layer on one side of the package substrate and forming a hydrophilic film layer on one side of the package substrate away from the hydrophobic film layer by the method described above, and then disposing the package substrate provided with the hydrophilic film layer and the hydrophobic film layer on the substrate. In this embodiment, the hydrophobic film layer may be formed first to avoid the adverse effect on the hydrophilicity of the hydrophilic film layer when modifying the low surface energy substance. The specific manner of disposing the package substrate provided with the hydrophilic film layer and the hydrophobic film layer on the substrate is not particularly limited as long as a good airtight space is formed between the package film layer and the substrate, for example, the package substrate may be a glass substrate, and the package film layer is disposed on the substrate by glass Frit (Frit) encapsulation. Regarding the specific process of Frit packaging, those skilled in the art can design the process according to the conventional process, and the detailed description is omitted here.
Or, according to other embodiments of the present invention, an organic film layer may be first disposed on a side of the organic light emitting device away from the substrate, on one hand, the organic film layer may protect the organic light emitting device, on the other hand, a base may be provided for a subsequent hydrophilic film layer, then, the method described above is used to form the hydrophilic film layer on the side of the organic film layer away from the organic light emitting device, the hydrophilic film layer may be firmly bonded to the organic film layer through a surface adhesive, then, a package substrate may be formed on the side of the hydrophilic film layer away from the organic film layer, the package substrate may be a flexible substrate, the package substrate may be firmly bonded to the hydrophilic film layer through an adhesive, finally, a hydrophobic film layer is formed on the side of the package substrate away from the hydrophilic film layer, the hydrophobic film layer may be firmly bonded to the package substrate through an adhesive, and the hydrophobic film layer rough blank may be modified by a low surface energy substance using a vapor deposition method, the hydrophobic membrane layer has excellent water and oxygen isolating effect.
In the description of the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "another embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. In addition, it should be noted that the terms "first" and "second" in this specification are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. An encapsulating film, comprising:
a package substrate;
a hydrophilic film layer disposed on one side of the package substrate;
a hydrophobic membrane layer disposed on a side of the package substrate away from the hydrophilic membrane layer,
the hydrophilic membrane layer and the hydrophobic membrane layer both comprise micro-mesoporous materials, the surface of one side, away from the packaging substrate, of the micro-mesoporous materials of the hydrophobic membrane layer is provided with low surface energy substances,
the hydrophilic film layer and the packaging substrate, and the hydrophobic film layer and the packaging substrate are respectively provided with a binder,
the binder comprises a material containing catechol side chains,
the hydrophobic membrane layer is obtained by fixing a micro mesoporous material for forming the hydrophobic membrane layer on one side of the packaging substrate to form a hydrophobic membrane layer rough blank, and modifying the hydrophobic membrane layer rough blank by using a low surface energy substance.
2. The encapsulation film layer of claim 1, wherein the micro-mesoporous material comprises at least one of silicon dioxide, titanium dioxide and carbon nanotubes having a micro-or mesoporous structure.
3. The encapsulating film layer of claim 1, wherein the bonding agent comprises dopamine.
4. The encapsulation film layer of any one of claims 1-3, wherein the encapsulation substrate comprises a rigid substrate or a flexible substrate.
5. A display panel, comprising:
a substrate base plate;
an organic light emitting device disposed on the substrate base plate;
an encapsulation film layer according to any one of claims 1 to 4, wherein the encapsulation film layer and the substrate define a closed space, the organic light emitting device is disposed in the closed space, and a hydrophilic film layer in the encapsulation film layer is disposed near the organic light emitting device.
6. A method of making a display panel, comprising:
disposing an organic light emitting device on a substrate;
arranging an encapsulation film layer on one side of the organic light-emitting device far away from the substrate base plate, wherein the encapsulation film layer and the substrate base plate define a closed space, the organic light-emitting device is arranged in the closed space,
the packaging film layer comprises a packaging substrate, a hydrophilic film layer and a hydrophobic film layer, the hydrophilic film layer is arranged on one side of the packaging substrate, the hydrophobic film layer is arranged on one side of the packaging substrate far away from the hydrophilic film layer,
the hydrophilic membrane layer and the hydrophobic membrane layer both comprise micro-mesoporous materials, the surface of one side, away from the packaging substrate, of the micro-mesoporous materials of the hydrophobic membrane layer is provided with low surface energy substances,
the hydrophilic film layer is fixed on the packaging substrate through an adhesive, the adhesive comprises a substance containing catechol side chain, and the hydrophobic film layer is formed through the following steps:
fixing a micro-mesoporous material on one side of the packaging substrate far away from the organic light-emitting device by using a binder to form a hydrophobic membrane layer rough blank;
modifying the hydrophobic membrane layer rough blank by using a low surface energy substance to obtain the hydrophobic membrane layer,
the binder comprises a material comprising catechol side chains.
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| CN113787799A (en) * | 2021-09-03 | 2021-12-14 | 富维薄膜（山东）有限公司 | Novel water mist-proof film and preparation method thereof |
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