Display panel and display device

Abstract

The invention relates to a display panel and a display device. The display panel comprises a light-emitting device layer, a covering layer and a packaging layer. The covering layer is arranged on one side of the light-emitting device layer; the packaging layer is arranged on the side, away from the light-emitting device layer, of the covering layer; wherein the covering layer contains a fluorine element, and the fluorine element is at least distributed on one side, close to the light-emitting device layer, of the covering layer, and / or the fluorine element is at least distributed on one side, close to the packaging layer, of the covering layer; according to the invention, the electrode in the light-emitting device layer can be protected, the damage of water and oxygen to the light-emitting device layer is reduced, and the stability of the light-emitting device layer is improved; besides, the adhesive force between the covering layer and the packaging layer and / or the adhesive force between the covering layer and the light-emitting device layer can be enhanced, the probability of stripping between the film layers is reduced, the reliability and the bending performance of the display panel are improved, and the service life of the display panel is prolonged.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light-Emitting Diodes (OLEDs) display panels have attracted the attention of many display manufacturers around the world due to their advantages such as autonomous light emission, wide operating temperature range, fast response speed, wide viewing angle, high luminous efficiency, ability to be manufactured on flexible substrates, low driving voltage and energy consumption, etc., and are hailed as the next generation of display technology. With the continuous development of science and technology, the production technology of display panels has become more and more mature, and the market has higher and higher requirements for the stability of panels.

[0003] At present, the reliability and stability of OLED display panels are still imperfect, and they are prone to water vapor erosion and film peeling, which leads to quality problems in the display panels. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a display device, which can improve the adhesion between the cover layer and the encapsulation layer and / or the adhesion between the cover layer and the light-emitting device layer, thereby improving the stability of the light-emitting device layer.

[0005] An embodiment of the present application provides a display panel, comprising:

[0006] a light emitting device layer;

[0007] A covering layer, disposed on one side of the light emitting device layer;

[0008] An encapsulation layer, arranged on a side of the cover layer away from the light-emitting device layer;

[0009] The covering layer contains fluorine element, and the fluorine element is distributed at least on a side of the covering layer close to the light-emitting device layer, and / or the fluorine element is distributed at least on a side of the covering layer close to the encapsulation layer.

[0010] In one embodiment of the present application, the covering layer contains a fluorine-containing material, and the fluorine-containing material contains a trifluoromethyl group.

[0011] In one embodiment of the present application, the number of fluorine atoms in the fluorine-containing material is greater than or equal to 10 and less than or equal to 40.

[0012] In one embodiment of the present application, the cover layer includes a plurality of stacked fluorine-containing layers and at least one high-fold layer, the fluorine-containing layer contains the fluorine element, and the refractive index of the high-fold layer is greater than the refractive index of the fluorine-containing layer;

[0013] The high-folding layer is located between two adjacent fluorine-containing layers, the side of the cover layer close to the light-emitting device layer is the fluorine-containing layer, and the side of the cover layer close to the encapsulation layer is the fluorine-containing layer.

[0014] In one embodiment of the present application, the plurality of fluorine-containing layers include a first fluorine-containing layer and a second fluorine-containing layer, at least one of the high-folding layers includes a first high-folding layer, the first high-folding layer is located between the first fluorine-containing layer and the second fluorine-containing layer, and the first fluorine-containing layer is located between the light-emitting device layer and the first high-folding layer.

[0015] In one embodiment of the present application, the plurality of fluorine-containing layers further include a third fluorine-containing layer, at least one of the high-folding layers further includes a second high-folding layer, the second high-folding layer is arranged on a side of the second fluorine-containing layer away from the first high-folding layer, the third fluorine-containing layer is arranged between the second high-folding layer and the encapsulation layer, and the refractive index of the second high-folding layer is equal to the refractive index of the first high-folding layer.

[0016] In one embodiment of the present application, the display panel further includes a low-fold layer disposed between the cover layer and the encapsulation layer, and a refractive index of the low-fold layer is smaller than a refractive index of the high-fold layer.

[0017] In one embodiment of the present application, the material of the low-fold layer includes metal halide.

[0018] In one embodiment of the present application, the light-emitting device layer includes a cathode layer disposed on a side of the cover layer away from the encapsulation layer, and the cathode layer is in contact with the fluorine-containing layer on a side of the cover layer close to the light-emitting device layer;

[0019] The encapsulation layer includes a first inorganic layer disposed on a side of the cover layer away from the light-emitting device layer, and the first inorganic layer is in contact with the fluorine-containing layer on a side of the cover layer close to the encapsulation layer.

[0020] In one embodiment of the present application, the display panel further comprises a substrate, the light-emitting device layer is arranged on the substrate, and the covering layer is arranged on a side of the light-emitting device layer away from the substrate;

[0021] The orthographic projection of the covering layer on the substrate is located within the coverage of the orthographic projection of the first inorganic layer on the substrate, and the orthographic projection of the light-emitting device layer on the substrate is located within the coverage of the orthographic projection of the first inorganic layer on the substrate.

[0022] According to the above-mentioned purpose of the present application, an embodiment of the present application further provides a display device, which includes the display panel.

[0023] The present application provides a display panel and a display device, wherein a covering layer is added between a light-emitting device layer and an encapsulation layer, and the covering layer contains a fluorine element, wherein the fluorine element is distributed at least on one side of the covering layer close to the light-emitting device layer, and / or the fluorine element is distributed at least on one side of the covering layer close to the encapsulation layer; the fluorine element can increase the molecular inertness, play a role in protecting the electrodes in the light-emitting device layer, reduce the damage of water and oxygen to the light-emitting device layer, and improve the stability of the light-emitting device layer; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the covering layer and the encapsulation layer and / or the adhesion between the covering layer and the light-emitting device layer, reduce the probability of peeling between film layers, improve the reliability and bending performance of the display panel, and increase the life of the display panel.

[0024] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0026] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0027] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a covering layer provided in an embodiment of the present application;

[0029] Figure 3 Another schematic diagram of the structure of the covering layer provided in the embodiment of the present application;

[0030] Figure 4 Another schematic diagram of the structure of the covering layer provided in the embodiment of the present application;

[0031] Figure 5 A schematic diagram of another structure of the covering layer provided in the embodiment of the present application;

[0032] Figure 6 Another structural schematic diagram of a display panel provided in an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 10. Light-emitting device layer; 11. Anode layer; 12. Light-emitting layer; 13. Cathode layer;

[0035] 20, covering layer; 21, fluorine-containing layer; 211, first fluorine-containing layer; 212, second fluorine-containing layer; 213, third fluorine-containing layer; 214, fourth fluorine-containing layer; 22, high folding layer; 221, first high folding layer; 222, second high folding layer;

[0036] 30. Encapsulation layer; 31. First inorganic layer; 32. Organic layer; 33. Second inorganic layer;

[0037] 40. Substrate;

[0038] 51, thin film transistor layer; 52, pixel definition layer; 520, pixel opening;

[0039] 60. Low fold layer;

[0040] 70. Cover plate. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0042] Please refer to Figure 1 The embodiment of the present application provides a display panel, which includes a light emitting device layer 10, a cover layer 20 and an encapsulation layer 30. The cover layer 20 is arranged on one side of the light emitting device layer 10; the encapsulation layer 30 is arranged on a side of the cover layer 20 away from the light emitting device layer 10.

[0043] The cover layer 20 contains fluorine element, and the fluorine element is distributed at least on one side of the cover layer 20 close to the light emitting device layer 10 , and / or the fluorine element is distributed at least on one side of the cover layer 20 close to the encapsulation layer 30 .

[0044] During the implementation and application process, the embodiment of the present application adds the covering layer 20 between the light-emitting device layer 10 and the encapsulation layer 30, and the covering layer 20 contains the fluorine element, and the fluorine element is at least distributed on the side of the covering layer 20 close to the light-emitting device layer 10, and / or the fluorine element is at least distributed on the side of the covering layer 20 close to the encapsulation layer 30; the fluorine element can increase the molecular inertness, play a role in protecting the electrodes in the light-emitting device layer 10, reduce the damage of water and oxygen to the light-emitting device layer 10, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the covering layer 20 and the encapsulation layer 30 and / or the adhesion between the covering layer 20 and the light-emitting device layer 10, reduce the probability of peeling between film layers, improve the reliability and bending performance of the display panel, and increase the life of the display panel.

[0045] For details, please refer to Figure 1 In some embodiments, the display panel provided by the embodiments of the present application includes a substrate 40, a thin film transistor layer 51 arranged on the substrate 40, and a pixel definition layer 52 arranged on the thin film transistor layer 51, the light-emitting device layer 10 is arranged on a side of the thin film transistor layer 51 away from the substrate 40, the covering layer 20 is arranged on a side of the light-emitting device layer 10 away from the substrate 40, and the encapsulation layer 30 is arranged on a side of the covering layer 20 away from the light-emitting device layer 10.

[0046] In some embodiments, the substrate 40 may be a hard substrate, such as a glass substrate; or the substrate 40 may be a flexible substrate, such as a substrate formed of polyimide. When the substrate is a flexible substrate, the substrate 40 may be formed of multiple sub-substrates made of the same material, such as polyimide, and adjacent sub-substrates are bonded by bonding sub-layers.

[0047] In some embodiments, the thin film transistor layer 51 includes a thin film transistor, which includes a semiconductor located on the substrate, and the semiconductor can be formed of polysilicon or metal oxide (such as indium gallium zinc oxide). The semiconductor is divided into a channel region and a source region and a drain region formed on both sides of the channel region. The thin film transistor layer 51 also includes a first gate insulating layer, which covers the semiconductor. The thin film transistor also includes a first gate formed on the first gate insulating layer, and the first gate overlaps with the channel region. The first gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer 51 also includes a second gate insulating layer, and the second gate insulating layer covers the first gate. The thin film transistor also includes a second gate located on the second gate insulating layer, and the second gate overlaps with the first gate. The second gate can be formed as a plurality of layers or a single layer including a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. The thin film transistor layer 51 also includes a first interlayer insulating layer formed on the second gate. The first interlayer insulating layer, the first gate insulating layer, and the second gate insulating layer include a source contact hole and a drain contact hole, and the source region and the drain region are exposed through the source contact hole and the drain contact hole, respectively.

[0048] The thin film transistor also includes a source and a drain arranged in the same layer, the source and the drain are both formed on the first interlayer insulating layer, the source is connected to the source region through the source contact hole, and the drain is connected to the drain region through the drain contact hole. The source and the drain may be multiple layers or a single layer formed of a low resistance material such as Al, Ti, Mo, Cu, Ni, or an alloy thereof, or a material with high corrosion resistance. For example, the source and the drain may be a triple layer of Ti / Cu / Ti, Ti / Ag / Ti, Ti / Al / Ti or Mo / Al / Mo or other single or multilayer structures.

[0049] In some embodiments, the thin film transistor layer 51 further includes a planar layer located on a side of the first interlayer insulating layer away from the substrate 40 , and the planar layer covers the source electrode and the drain electrode.

[0050] In some embodiments, the pixel definition layer 52 is disposed on the planar layer, and a plurality of pixel openings 520 are defined in the pixel definition layer 52 .

[0051] In some embodiments, the light-emitting device layer 10 includes an anode layer 11, a light-emitting layer 12 and a cathode layer 13, wherein the anode layer 11 includes a plurality of anodes arranged corresponding to the plurality of pixel openings 520, the plurality of anodes and the plurality of pixel openings 520 can be arranged in a one-to-one correspondence, and each of the pixel openings 520 exposes the surface of the corresponding anode.

[0052] The light-emitting layer 12 is disposed in each pixel opening 520 and is located on the side of the corresponding anode away from the thin film transistor layer 51 . The cathode layer 13 is located on the side of the light-emitting layer 12 away from the anode layer 11 . The cathode layer 13 covers the light-emitting layer 12 and the pixel definition layer 52 .

[0053] The cover layer 20 is disposed on a side of the cathode layer 13 away from the pixel definition layer 52 , and the encapsulation layer 30 is disposed on a side of the cover layer 20 away from the cathode layer 13 .

[0054] In an embodiment of the present application, the covering layer 20 contains fluorine element, and the fluorine element is at least distributed on one side of the covering layer 20 close to the light-emitting device layer 10, and / or the fluorine element is at least distributed on one side of the covering layer 20 close to the encapsulation layer 30; wherein, the fluorine element can increase molecular inertness, play a role in protecting the electrodes in the light-emitting device layer 10, reduce the damage of water and oxygen to the light-emitting device layer 10, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase molecular polarity, which is beneficial to enhance the adhesion between the covering layer 20 and the encapsulation layer 30 and the adhesion between the covering layer 20 and the light-emitting device layer 10, reduce the probability of peeling between film layers, improve the reliability and bending performance of the display panel, and increase the life of the display panel.

[0055] In some embodiments, the covering layer 20 contains a fluorine-containing material, and the fluorine-containing material can be an organic compound, and the fluorine-containing material contains a trifluoromethyl group; further, the fluorine-containing material also includes an aromatic group, and the trifluoromethyl group is connected to the aromatic group, which not only increases the molecular polarity, but also minimizes the impact on the molecular conjugation, thereby avoiding affecting the main performance of the material.

[0056] In some embodiments, the aromatic group in the fluorine-containing material may include at least one of a phenyl group and a phenylimide group.

[0057] In some embodiments, the number of fluorine atoms in the fluorine-containing material is greater than or equal to 10 and less than or equal to 40; for example, the number of fluorine atoms in the fluorine-containing material can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 or 40.

[0058] Among them, if the number of fluorine atoms in the fluorine-containing material is too small, it will not be enough to increase the molecular polarity, which will lead to insufficient improvement in the adhesion between adjacent film layers; if there are too many fluorine atoms in the fluorine-containing material, it will lead to a decrease in the surface energy of the film, and the film-forming properties on the cathode layer 13 will be poor, affecting the yield of the display panel.

[0059] In some embodiments, the number of fluorine atoms in the fluorine-containing material is greater than or equal to 15 and less than or equal to 35; further preferably, the number of fluorine atoms in the fluorine-containing material is greater than or equal to 18 and less than or equal to 30; more preferably, the number of fluorine atoms in the fluorine-containing material is greater than or equal to 20 and less than or equal to 25.

[0060] It is understood that the number of fluorine atoms in the fluorine-containing material can be obtained by mass spectrometry and elemental analysis.

[0061] In some embodiments, the molecular structure of the fluorine-containing material can be C 36 H 12 N 2 O 4 F 18 , and the content of the fluorine element in the fluorine-containing material is 38.9%.

[0062] In the embodiment of the present application, the covering layer 20 includes a plurality of stacked fluorine-containing layers 21 and at least one high-fold layer 22, the fluorine-containing layer 21 contains the fluorine element, and the refractive index of the high-fold layer 22 is greater than the refractive index of the fluorine-containing layer 21; the high-fold layer 22 is located between two adjacent fluorine-containing layers 21, the side of the covering layer 20 close to the light-emitting device layer 10 is the fluorine-containing layer 21, and the side of the covering layer 20 close to the encapsulation layer 30 is the fluorine-containing layer 21; that is, each of the high-fold layers 22 is located between two adjacent fluorine-containing layers 21, the film layer of the covering layer 20 closest to the light-emitting device layer 10 is the fluorine-containing layer 21, and the film layer of the covering layer 20 closest to the encapsulation layer 30 is the fluorine-containing layer 21.

[0063] It can be understood that the fluorine-containing layer 21 contains the fluorine-containing material. Since the outermost sides of the covering layer 20 are set as the fluorine-containing layer 21, the embodiment of the present application can effectively increase the adhesion between the fluorine-containing layer 21 and the two adjacent film layers, that is, increase the adhesion between the covering layer 20 and the encapsulation layer 30 and increase the adhesion between the covering layer 20 and the light-emitting device layer 10.

[0064] It should be noted that, in the fluorine-containing layer 21 on the side of the covering layer 20 close to the encapsulation layer 30, the fluorine-containing material is at least distributed on the side of the fluorine-containing layer 21 close to the encapsulation layer 30, and in the fluorine-containing layer 21 on the side of the covering layer 20 close to the light-emitting device layer 10, the fluorine-containing material is at least distributed on the side of the fluorine-containing layer 21 close to the light-emitting device layer 10; further, the fluorine-containing material is uniformly distributed in the fluorine-containing layer 21, thereby increasing the adhesion between the covering layer 20 and the encapsulation layer 30, increasing the adhesion between the covering layer 20 and the light-emitting device layer 10, and enhancing the adhesion between adjacent film layers in the covering layer 20, for example, the adhesion between the fluorine-containing layer 21 and the high-folding layer 22 can be enhanced.

[0065] In some embodiments, the thickness of the fluorine-containing layer 21 may be greater than or equal to 10 nm and less than or equal to 20 nm. For example, the thickness of the fluorine-containing layer 21 may be 10 nm, 11 nm, 12 nm, 13 nm, 14 nm, 15 nm, 16 nm, 17 nm, 18 nm, 19 nm or 20 nm.

[0066] It should be noted that each of the fluorine-containing layers 21 contains the fluorine-containing material and has the properties defined in the above embodiments.

[0067] In some embodiments, the cathode layer 13 contacts the side of the covering layer 20 close to the light-emitting device layer 10, that is, the cathode layer 13 contacts the fluorine-containing layer 21 of the covering layer 20 close to the light-emitting device layer 10; the encapsulation layer 30 includes a first inorganic layer 31 arranged on the side of the covering layer 20 away from the light-emitting device layer 10, and the first inorganic layer 31 contacts the side of the covering layer 20 close to the encapsulation layer 30, that is, the first inorganic layer 31 contacts the fluorine-containing layer 21 of the covering layer 20 close to the encapsulation layer 30; thereby, the adhesion between the covering layer 20 and the cathode layer 13 and the adhesion between the covering layer 20 and the first inorganic layer 31 can be effectively improved. At the same time, the fluorine element in the fluorine-containing layer 21 can increase molecular inertness, play a role in protecting the cathode layer 13, reduce the damage of water and oxygen to the cathode layer 13, and improve the stability of the light-emitting device layer 10; thereby, the display effect and stability of the display panel are improved.

[0068] In some embodiments, the orthographic projection of the covering layer 20 on the substrate 40 is located within the coverage range of the orthographic projection of the first inorganic layer 31 on the substrate 40, and the orthographic projection of the light-emitting device layer 10 on the substrate 40 is located within the coverage range of the orthographic projection of the first inorganic layer 31 on the substrate 40; since the fluorine-containing layer 21 in the covering layer 20 is an organic material layer, its overall ability to block water and oxygen is relatively poor. Therefore, the first inorganic layer 31 covers the covering layer 20, which can effectively ensure the water and oxygen blocking ability of the display panel.

[0069] In some embodiments, the material of the first inorganic layer 31 includes an inorganic film layer containing three elements or two elements of nitrogen, silicon, and oxygen, for example, may include at least one of silicon nitride, silicon oxide, and silicon oxynitride.

[0070] In some embodiments, the refractive index of the high-fold layer 22 may be greater than or equal to 1.7 and less than or equal to 2.5. The high-fold layer 22 may enhance the microcavity effect of the display panel, thereby improving the light extraction efficiency of the display panel.

[0071] In some embodiments, the thickness of the high fold layer 22 may be greater than or equal to 40 nm and less than or equal to 70 nm. For example, the thickness of the high fold layer 22 may be 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, 65 nm or 70 nm.

[0072] It should be noted that, in actual application, the display panel may be subjected to a TEM test, and the distribution of the fluorine element may be clearly seen between the cathode layer 13 and the first inorganic layer 31 .

[0073] In one embodiment of the present application, please combine Figure 1 as well as Figure 2 The multiple fluorine-containing layers 21 include a first fluorine-containing layer 211 and a second fluorine-containing layer 212, at least one of the high-folding layers 22 includes a first high-folding layer 221, the first high-folding layer 221 is located between the first fluorine-containing layer 211 and the second fluorine-containing layer 212, and the first fluorine-containing layer 211 is located between the light-emitting device layer 10 and the first high-folding layer 221.

[0074] The first fluorine-containing layer 211 , the first high-fold layer 221 and the second fluorine-containing layer 212 are stacked, and the first fluorine-containing layer 211 is in contact with the cathode layer 13 , and the second fluorine-containing layer 212 is in contact with the first inorganic layer 31 .

[0075] The first fluorine-containing layer 211 and the second fluorine-containing layer 212 both contain fluorine-containing materials, and the fluorine-containing material can be distributed on the side of the first fluorine-containing layer 211 close to the cathode layer 13 or evenly distributed in the first fluorine-containing layer 211, and the fluorine-containing material can be distributed on the side of the second fluorine-containing layer 212 close to the first inorganic layer 31 or evenly distributed in the second fluorine-containing layer 212; the fluorine element can increase the molecular inertness, play a role in protecting the cathode layer 13, reduce the damage of water and oxygen to the cathode layer 13, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the cover layer 20 and the encapsulation layer 30 and the adhesion between the cover layer 20 and the light-emitting device layer 10, reduce the probability of peeling between film layers, improve the reliability and bending performance of the display panel, and increase the life of the display panel; and the first high-folding layer 221 has a higher refractive index, which can enhance the microcavity effect of the display panel to improve the light extraction efficiency of the display panel.

[0076] In another embodiment of the present application, please combine Figure 1 as well as Figure 3 , this embodiment and Figure 2 The difference between the illustrated embodiment is that the display panel further includes a low-fold layer 60 disposed between the second fluorine-containing layer 212 and the encapsulation layer 30 , and the refractive index of the low-fold layer 60 is smaller than the refractive index of the first high-fold layer 221 .

[0077] It can be understood that the refractive index of the low-fold layer 60 is relatively small and is smaller than the refractive index of the first high-fold layer 221. Therefore, the first high-fold layer 221 is combined with the low-fold layer 60 located on the side of the first high-fold layer 221 away from the light-emitting device layer 10, which can further enhance the microcavity effect of the display panel to improve the light extraction efficiency of the display panel.

[0078] In some embodiments, the refractive index of the low-fold layer 60 may be greater than or equal to 1.2 and less than or equal to 1.6.

[0079] In some embodiments, the thickness of the low-fold layer 60 may be less than 100 nm.

[0080] In some embodiments, the material of the low-fold layer 60 includes metal halides, such as alkali metal halides, preferably lithium fluoride; wherein, compared with other materials, metal halides can achieve a very low refractive index, thereby improving light extraction efficiency; in addition, metal halides can form a polar interface between the second fluorine-containing layer 212 and the first inorganic layer 31, further enhancing the adhesion between the interfaces and reducing the probability of peeling between film layers.

[0081] Further, in Figure 3 In the illustrated embodiment, the first fluorine-containing layer 211 , the first high-fold layer 221 , the second fluorine-containing layer 212 and the low-fold layer 60 are stacked, and the first fluorine-containing layer 211 is in contact with the cathode layer 13 , and the low-fold layer 60 is in contact with the first inorganic layer 31 and the second fluorine-containing layer 212 .

[0082] The first fluorine-containing layer 211 and the second fluorine-containing layer 212 both contain fluorine-containing materials, and the fluorine-containing materials can be distributed on the side of the first fluorine-containing layer 211 close to the cathode layer 13 or evenly distributed in the first fluorine-containing layer 211; the fluorine element can increase the molecular inertness, protect the cathode layer 13, reduce the damage of water and oxygen to the cathode layer 13, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the cover layer 20 and the light-emitting device layer 10. In addition, the low refractive index The material of layer 60 is metal halide, and the metal halide can form a polar interface between the second fluorine-containing layer 212 and the first inorganic layer 31, further enhancing the adhesion between the interfaces, reducing the probability of peeling between film layers, reducing the probability of peeling between film layers, improving the reliability and bending performance of the display panel, and increasing the life of the display panel; and the first high-fold layer 221 has a higher refractive index, and the low-fold layer 60 has a lower refractive index. The two can cooperate to further enhance the microcavity effect of the display panel to improve the light extraction efficiency of the display panel.

[0083] In another embodiment of the present application, please refer to Figure 1 as well as Figure 4 , this embodiment and Figure 2The difference between the illustrated embodiments is that: the plurality of fluorine-containing layers 21 further include a third fluorine-containing layer 213, at least one of the high-folding layers 22 further includes a second high-folding layer 222, the second high-folding layer 222 is arranged on a side of the second fluorine-containing layer 212 away from the first high-folding layer 221, the third fluorine-containing layer 213 is arranged between the second high-folding layer 222 and the encapsulation layer 30, and the refractive index of the second high-folding layer 222 is equal to the refractive index of the first high-folding layer 221.

[0084] It can be understood that in this embodiment, the number of the fluorine-containing layers 21 is three, the number of the high-folding layers 22 is two, and in the direction from the cathode layer 13 to the first inorganic layer 31, the first fluorine-containing layer 211, the first high-folding layer 221, the second fluorine-containing layer 212, the second high-folding layer 222 and the third fluorine-containing layer 213 are stacked in sequence, the first fluorine-containing layer 211 is in contact with the cathode layer 13, the third fluorine-containing layer 213 is in contact with the low-folding layer 60, and the side of the low-folding layer 60 away from the third fluorine-containing layer 213 is in contact with the first inorganic layer 31.

[0085] Among them, the fluorine-containing material can be distributed on the side of the first fluorine-containing layer 211 close to the cathode layer 13 or uniformly distributed in the first fluorine-containing layer 211. The fluorine element can increase the molecular inertness, protect the cathode layer 13, reduce the damage of water and oxygen to the cathode layer 13, and improve the stability of the light-emitting device layer 10. In addition, the fluorine element can increase the molecular polarity, which is conducive to enhancing the adhesion between the cover layer 20 and the light-emitting device layer 10. In addition, the material of the low-fold layer 60 is a metal halide, and the metal halide can form a polar interface between the second fluorine-containing layer 212 and the first inorganic layer 31, further enhancing the adhesion between the interfaces, reducing the probability of peeling between the film layers, reducing the probability of peeling between the film layers, improving the reliability and bending performance of the display panel, and improving the life of the display panel. The first high-fold layer 221 has a higher refractive index, and the low-fold layer 60 has a lower refractive index. The two can cooperate to further enhance the microcavity effect of the display panel to improve the light extraction efficiency of the display panel.

[0086] In another embodiment of the present application, please combine Figure 1 as well as Figure 5 The plurality of fluorine-containing layers 21 include a fourth fluorine-containing layer 214 , and the fourth fluorine-containing layer 214 is disposed between the cathode layer 13 and the first inorganic layer 31 .

[0087] The fourth fluorine-containing layer 214 contains fluorine-containing material, and the fluorine-containing material is distributed at least on a side of the fourth fluorine-containing layer 214 close to the cathode layer 13 and a side of the fourth fluorine-containing layer 214 close to the first inorganic layer 31 , or the fluorine-containing material is uniformly distributed in the fourth fluorine-containing layer 214 .

[0088] Among them, the fourth fluorine-containing layer 214 is in contact with the cathode layer 13, and the fourth fluorine-containing layer 214 is in contact with the first inorganic layer 31. The fluorine element can increase the molecular inertness, protect the cathode layer 13, reduce the damage of water and oxygen to the cathode layer 13, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the covering layer 20 and the light-emitting device layer 10 and enhance the adhesion between the covering layer 20 and the encapsulation layer 30.

[0089] It should be noted that, in the covering layer 20 provided in the embodiment of the present application, the number of fluorine-containing layers 21 and high-fold layers 22 can be more, but it is necessary to ensure that the side of the covering layer 20 close to the cathode layer 13 is the fluorine-containing layer 21, and the side of the covering layer 20 close to the first inorganic layer 31 is the fluorine-containing layer 21, and each of the high-fold layers 22 is located between two adjacent fluorine-containing layers 21.

[0090] In some embodiments, please refer to Figure 6 The encapsulation layer 30 further includes an organic layer 32 disposed on a side of the first inorganic layer 31 away from the covering layer 20 and a second inorganic layer 33 disposed on a side of the organic layer 32 away from the first inorganic layer 31. The display panel further includes a cover plate 70 disposed on a side of the encapsulation layer 30 away from the covering layer 20, and the cover plate 70 is disposed on a side of the second inorganic layer 33 away from the organic layer 32.

[0091] In some embodiments, the cover plate 70 may be bonded to the packaging layer 30 via an adhesive layer, and the adhesive layer may be a transparent adhesive layer, such as OCA optical adhesive.

[0092] As mentioned above, in the embodiment of the present application, the covering layer 20 is added between the light-emitting device layer 10 and the encapsulation layer 30, and the covering layer 20 contains the fluorine element, and the fluorine element is at least distributed on the side of the covering layer 20 close to the light-emitting device layer 10, and / or the fluorine element is at least distributed on the side of the covering layer 20 close to the encapsulation layer 30; the fluorine element can increase the molecular inertness, play a role in protecting the electrodes in the light-emitting device layer 10, reduce the damage of water and oxygen to the light-emitting device layer 10, and improve the stability of the light-emitting device layer 10; in addition, the fluorine element can increase the molecular polarity, which is beneficial to enhance the adhesion between the covering layer 20 and the encapsulation layer 30 and the adhesion between the covering layer 20 and the light-emitting device layer 10, reduce the probability of peeling between film layers, improve the reliability and bending performance of the display panel, and increase the life of the display panel.

[0093] In addition, an embodiment of the present application further provides a display device, which includes the display panel described in the above embodiment.

[0094] It can be understood that the display device has the display panel described in the above embodiment. Therefore, the display device has the same beneficial effects as the display panel in the above embodiment, which will not be described in detail here.

[0095] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0096] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0097] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0098] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: a light emitting device layer; A covering layer, disposed on one side of the light emitting device layer; An encapsulation layer, arranged on a side of the cover layer away from the light-emitting device layer; The covering layer contains fluorine element, and the fluorine element is distributed at least on a side of the covering layer close to the light-emitting device layer, and / or the fluorine element is distributed at least on a side of the covering layer close to the encapsulation layer.

2. The display panel according to claim 1, characterized in that: The cover layer includes a fluorine-containing material, and the fluorine-containing material includes a trifluoromethyl group.

3. The display panel according to claim 2, characterized in that: The number of fluorine atoms in the fluorine-containing material is greater than or equal to 10 and less than or equal to 40.

4. The display panel according to claim 1, characterized in that: The cover layer comprises a plurality of stacked fluorine-containing layers and at least one high-fold layer, the fluorine-containing layer contains the fluorine element, and the refractive index of the high-fold layer is greater than the refractive index of the fluorine-containing layer; The high-folding layer is located between two adjacent fluorine-containing layers, the side of the cover layer close to the light-emitting device layer is the fluorine-containing layer, and the side of the cover layer close to the encapsulation layer is the fluorine-containing layer.

5. The display panel according to claim 4, characterized in that: The plurality of fluorine-containing layers include a first fluorine-containing layer and a second fluorine-containing layer, at least one of the high-folding layers includes a first high-folding layer, the first high-folding layer is located between the first fluorine-containing layer and the second fluorine-containing layer, and the first fluorine-containing layer is located between the light-emitting device layer and the first high-folding layer.

6. The display panel according to claim 5, characterized in that: The multiple fluorine-containing layers further include a third fluorine-containing layer, at least one of the high-folding layers further includes a second high-folding layer, the second high-folding layer is arranged on a side of the second fluorine-containing layer away from the first high-folding layer, the third fluorine-containing layer is arranged between the second high-folding layer and the encapsulation layer, and the refractive index of the second high-folding layer is equal to the refractive index of the first high-folding layer.

7. The display panel according to any one of claims 4 to 6, characterized in that: The display panel further includes a low-fold layer disposed between the cover layer and the encapsulation layer, and a refractive index of the low-fold layer is smaller than a refractive index of the high-fold layer.

8. The display panel according to claim 7, characterized in that: The material of the low-fold layer includes metal halide.

9. The display panel according to claim 4, characterized in that: The light emitting device layer comprises a cathode layer disposed on a side of the cover layer away from the encapsulation layer, wherein the cathode layer is in contact with the fluorine-containing layer on a side of the cover layer close to the light emitting device layer; The encapsulation layer includes a first inorganic layer disposed on a side of the cover layer away from the light-emitting device layer, and the first inorganic layer is in contact with the fluorine-containing layer on a side of the cover layer close to the encapsulation layer.

10. The display panel according to claim 9, characterized in that: The display panel further comprises a substrate, the light emitting device layer is arranged on the substrate, and the covering layer is arranged on a side of the light emitting device layer away from the substrate; The orthographic projection of the covering layer on the substrate is located within the coverage of the orthographic projection of the first inorganic layer on the substrate, and the orthographic projection of the light-emitting device layer on the substrate is located within the coverage of the orthographic projection of the first inorganic layer on the substrate.

11. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 10.

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