CN214588861U - Display panel and display device - Google Patents
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- CN214588861U CN214588861U CN202120924213.9U CN202120924213U CN214588861U CN 214588861 U CN214588861 U CN 214588861U CN 202120924213 U CN202120924213 U CN 202120924213U CN 214588861 U CN214588861 U CN 214588861U
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Abstract
The application discloses a display panel and a display device, which comprise a substrate, a pixel definition layer and a light-emitting element layer, wherein the pixel definition layer is arranged on one side of the substrate and comprises a plurality of sub-pixel openings; the light-emitting element layer at least comprises light-emitting units of three colors, the light-emitting units are arranged in the sub-pixel openings in a one-to-one correspondence mode, blocking structures are arranged on the side walls of at least part of the sub-pixel openings, each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode, the first electrode is located on the substrate, the light-emitting layer comprises a light-emitting material layer and a first current carrier layer, the first current carrier layer is located on one side, away from the substrate, of the first electrode, and the first current carrier layer is blocked through the blocking structures. The display panel can prevent crosstalk between adjacent light-emitting units, and has better display effect.
Description
Technical Field
The application belongs to the technical field of display equipment, and particularly relates to a display panel and a display device.
Background
In the existing OLED display device, the starting voltages of red, green and blue sub-pixels are different, the starting voltages of the red sub-pixel and the green sub-pixel are lower, the starting voltage of the blue sub-pixel is higher, and the conductivity of a current carrier layer communicating the three sub-pixels is better, so that the red sub-pixel and/or the green sub-pixel can be lighted by mistake when the blue sub-pixel is lighted, and low gray-scale crosstalk can be caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a display panel and a display device, wherein the display panel can prevent crosstalk between adjacent light-emitting units, and the display effect is better.
In one aspect, an embodiment of the present application provides a display panel, including a substrate, a pixel defining layer and a light emitting element layer, where the pixel defining layer is disposed on one side of the substrate and includes a plurality of sub-pixel openings penetrating through the pixel defining layer along a thickness direction; the light-emitting element layer at least comprises light-emitting units of three colors, each light-emitting unit is arranged in the sub-pixel opening in a one-to-one correspondence mode, each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode, the first electrode, the light-emitting layer and the second electrode are located on the substrate, and the light-emitting layer comprises a light-emitting material layer and a first current carrier layer located on one side, away from the substrate, of the first electrode; and the pixel definition layer is provided with a blocking structure, and at least part of the first current carrier layer is blocked by the blocking structure.
According to one aspect of the present application, the first charge carrier layer includes at least one of a hole injection layer, a hole transport layer, and an electron blocking layer.
According to one aspect of the application, the blocking structure comprises a blocking portion, the blocking portion is arranged on the side wall of the sub-pixel opening, and the vertical distance between one side, close to the substrate, of the blocking portion and the surface, away from the substrate, of one side of the first electrode, along the direction perpendicular to the substrate, is greater than or equal to the thickness of the hole injection layer;
according to one aspect of the present application, the barrier portion extends from a sidewall of the sub-pixel opening to a direction close to the sub-pixel opening to form a protruding structure; in the horizontal direction parallel to the substrate, the minimum distance of the protrusion structure protruding out of the side wall of the sub-pixel opening is larger than the thickness of the hole injection layer;
or the barrier part extends from the side wall of the sub-pixel opening to the direction far away from the sub-pixel opening to form a groove structure.
According to one aspect of the application, the barriers are distributed around the circumference of the sidewalls of the sub-pixel openings.
According to one aspect of the application, the perpendicular distance between the side of the barrier part close to the substrate and the surface of the first electrode facing away from the substrate is 100nm-200 nm.
According to one aspect of the application, the barrier structure comprises a barrier layer for cleaving the first charge carrier layer in contact with the barrier layer;
the barrier layer is arranged on the side wall of the sub-pixel opening; and/or the presence of a gas in the gas,
the blocking layer is arranged on one side, away from the substrate, of the pixel defining layer;
preferably, when the blocking layer is disposed on the sidewall of the sub-pixel opening, the blocking layer is circumferentially distributed around the sidewall of the sub-pixel opening, the blocking layer is at least located at one side close to the substrate, and a distance from one side of the blocking layer away from the substrate to the first electrode is greater than or equal to a thickness of the hole injection layer; and/or the blocking layer is arranged on one side, away from the substrate, of the pixel defining layer and is close to the sub-pixel opening.
According to one aspect of the present application, the barrier layer is a P-type organic material.
According to one aspect of the application, the barrier layer is organic glue containing iodine, and the material of the organic glue is polysiloxane, poly-cinnamic acid series or phenolic resin.
According to an aspect of the present application, the light emitting element layer includes at least a red light emitting unit, a green light emitting unit, and a blue light emitting unit, wherein at least a pixel defining layer corresponding to the blue light emitting unit in the pixel defining layer is provided with the barrier structure.
According to one aspect of the present application, the light emitting layer further includes a second carrier layer on a side of the light emitting material layer facing away from the substrate, the second carrier layer including at least one of an electron injection layer, an electron transport layer, and a hole blocking layer.
On the other hand, an embodiment of the present application further provides a display device, including any one of the display panels provided in the first aspect of the present application.
Compared with the prior art, the display panel provided by the application comprises a substrate, a pixel defining layer and a light-emitting element layer, wherein the light-emitting element layer comprises light-emitting units of at least three colors, each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode, and the first electrode is formed on the substrate. The pixel defining layer is formed on one side of the first electrode, which is far away from the substrate, and comprises sub-pixel openings which are in one-to-one correspondence with the first electrodes so as to expose the first electrodes. The light-emitting layer comprises a light-emitting material layer and a first carrier layer, and the first carrier layer is arranged on the pixel defining layer and positioned in the sub-pixel opening. At least part of the pixel defining layer is provided with a blocking structure, and the first current carrier layer is blocked by the blocking structure so that the first current carrier layers positioned among at least part of the light emitting units are not communicated, thereby blocking the current transmission among at least part of the light emitting units. The light emitting units on two sides of the blocking structure emit light independently and do not affect each other, so that crosstalk between at least part of adjacent light emitting units in the display panel can be reduced, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a first film layer structure provided by an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a second film layer structure provided by an embodiment of the present application;
FIG. 4 is a schematic view of a third film structure provided in the examples of the present application;
FIG. 5 is a schematic view of a fourth film structure provided in the examples of the present application;
FIG. 6 is a schematic diagram of a fifth film layer structure provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of a sixth film layer structure provided by an embodiment of the present application;
fig. 8 is a schematic view of a seventh film layer structure provided in an embodiment of the present application.
In the drawings:
1-a substrate; 2-a light emitting element layer; 21-a first electrode; 22-a layer of luminescent material; 23-a hole injection layer; 24-a hole transport layer; 25-an electron transport layer; 26-an electron injection layer; 27-a second electrode; 3-a pixel definition layer; 31-subpixel openings; 4-a raised structure; 5-a groove structure; 6-barrier layer.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The inventor finds out through research that: in the existing OLED display device, the starting voltages of the red, green and blue light-emitting units are different, and the starting voltage of the blue light-emitting unit is greater than that of the green light-emitting unit and is greater than that of the red light-emitting unit. In actual display, when the blue light emitting unit is turned on, although the voltage mainly spans the blue light emitting unit, since the current carrier layer connecting the light emitting units of the three colors has good conductivity, a part of the voltage is applied to the green light emitting unit and/or the red light emitting unit through the current carrier layer, and since the turn-on voltages of the red light emitting unit and the green light emitting unit are both smaller than the turn-on voltage of the blue light emitting unit, the red light emitting unit and/or the green light emitting unit are easy to be turned on simultaneously. Based on the above analysis, the inventors provide a display panel and a display device, which can solve the crosstalk problem caused by the low turn-on voltages of the red light emitting unit and the green light emitting unit and the high turn-on voltage of the blue light emitting unit.
For better understanding of the present application, the following description is made in detail with reference to fig. 1 to 5 for a display panel and a display device according to an embodiment of the present application.
Referring to fig. 1 to 2, an embodiment of the present invention provides a display panel, including: the pixel structure comprises a substrate 1, a pixel defining layer 3 and a light-emitting element layer 2, wherein the pixel defining layer 3 is arranged on one side of the substrate 1 and comprises a plurality of sub-pixel openings 31 penetrating through the pixel defining layer 3 along the thickness direction; the light emitting element layer 2 includes at least three colors of light emitting units, each of which is disposed in the sub-pixel opening 31 in a one-to-one correspondence, and includes a first electrode 21, a light emitting layer, and a second electrode 27 on the substrate 1. The light-emitting layer comprises a light-emitting material layer 22 and a first carrier layer positioned on the side, away from the substrate 1, of the first electrode 21; wherein, the pixel definition layer 3 is provided with a barrier structure, and at least part of the first current carrier layer is separated by the barrier structure.
The display panel comprises a substrate 1, a pixel defining layer 3 and a light emitting element layer 2, wherein the light emitting element layer 2 comprises light emitting units of at least three colors, each light emitting unit comprises a first electrode 21, a light emitting layer and a second electrode 27, and the first electrode 21 is formed on the substrate 1. The pixel defining layer 3 is formed on a side of the first electrode 21 away from the substrate 1, and the pixel defining layer 3 includes sub-pixel openings 31 corresponding to the first electrodes 21 one to expose the first electrodes 21. The light emitting layer comprises a layer of light emitting material 22 and a first charge carrier layer provided on the pixel defining layer 3 and located within the sub-pixel openings as shown. At least part of the pixel defining layer 3 is provided with a blocking structure, and the first carrier layer is blocked by the blocking structure, so that the first carrier layers positioned among at least part of the light emitting units are not communicated, and the current transmission among at least part of the light emitting units is blocked. The light emitting units on two sides of the blocking structure emit light independently and do not affect each other, so that crosstalk between at least part of adjacent light emitting units in the display panel can be reduced, and the display effect is improved.
In the above display panel, the first carrier layer includes at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. In some possible embodiments, in a direction away from the substrate 1, the first charge carrier layer includes a hole injection layer 23, a hole transport layer 24, and an electron blocking layer disposed on the substrate 1; in the display panel, at least the hole injection layer 23 is separated by the separation structure, so that at least part of the hole injection layers 23 of the adjacent light-emitting units are not communicated with each other, the light-emitting effects of at least part of the adjacent light-emitting units are independent from each other and do not influence each other, the anti-crosstalk capability of the display panel is greatly improved, and the display effect of the display panel is better.
In the above display panel, the light emitting element layer 2 includes at least a red light emitting unit, a green light emitting unit, and a blue light emitting unit. The starting voltage of the blue light-emitting unit is greater than that of the green light-emitting unit, and the starting voltage of the green light-emitting unit is greater than that of the red light-emitting unit. When the blue light-emitting unit emits light, the blocking structure arranged between the blue light-emitting unit and the adjacent light-emitting unit of other color can block the current transmission between the blue light-emitting unit and the adjacent light-emitting unit of other color. When the blue light-emitting unit is turned on, the voltage for turning on the blue light-emitting unit is prevented from erroneously turning on the light-emitting units of other colors adjacent to the blue light-emitting unit (that is, the current for turning on the blue light-emitting unit is prevented from flowing to the first carrier layer of the green light-emitting unit and/or the red light-emitting unit adjacent to the blue light-emitting unit through the first carrier layer), so that the crosstalk prevention effect between the adjacent light-emitting units is improved.
When the green light-emitting unit emits light, the blocking structure arranged between the green light-emitting unit and the adjacent red light-emitting unit can block the current transmission between the green light-emitting unit and the adjacent red light-emitting unit. When the green light-emitting unit is lightened, the voltage for lightening the green light-emitting unit is prevented from mistakenly lightening the red light-emitting unit adjacent to the green light-emitting unit (namely, the current for lightening the green light-emitting unit is prevented from flowing into the first carrier layer of the red light-emitting unit adjacent to the green light-emitting unit through the first carrier layer), so that the crosstalk prevention effect between the adjacent light-emitting units is improved.
In one possible embodiment, at least a pixel defining layer corresponding to the blue light emitting unit among the pixel defining layers is provided with a barrier structure. Namely, at least the blue light-emitting unit and the adjacent light-emitting unit are separated, and the blue light-emitting unit with higher lighting voltage is prevented from causing crosstalk between the adjacent light-emitting units.
In the above display panel, the light-emitting layer further includes a second carrier layer located on a side of the light-emitting material layer 22 facing away from the substrate 1, and the second carrier layer includes at least one of an electron injection layer, an electron transport layer, and a hole blocking layer. In a possible embodiment, the second charge carrier layer includes an electron injection layer 26, and further includes an electron transport layer 25 disposed on a side of the electron injection layer 26 close to the substrate; in a possible embodiment, when the first charge carrier layer comprises an electron blocking layer, the second charge carrier layer further comprises a hole blocking layer, and the hole blocking layer is located between the electron transport layer 25 and the light emitting material layer 22, that is, the hole blocking layer is located on the side of the electron transport layer 25 facing the substrate 1.
In one possible embodiment, the shape of the sub-pixel opening 31 along the cross section perpendicular to the substrate 1 is a trapezoid in the viewing angle with the substrate 1 below and the light emitting element layer 2 above, which is convenient for manufacturing, and the shape of the sub-pixel opening 31 along the cross section perpendicular to the substrate 1 may be other shapes, which is not particularly limited in the present application.
In a possible embodiment, the blocking structure includes a blocking portion formed on a sidewall of the sub-pixel opening 31, and a vertical distance between a side of the blocking portion close to the substrate and a surface of the first electrode 21 facing away from the substrate 1 along a direction perpendicular to the substrate is greater than or equal to a thickness of the hole injection layer 23, so as to ensure that at least the hole injection layer 23 is blocked by the blocking portion, thereby preventing crosstalk between adjacent light emitting units.
In a possible embodiment, the vertical distance between the side of the blocking portion close to the substrate and the surface of the side of the first electrode away from the substrate along the direction perpendicular to the substrate 1 is 100nm to 200nm, so that the vertical distance between the side of the blocking portion close to the substrate and the surface of the side of the first electrode away from the substrate can be greater than or equal to the thickness of the hole injection layer 23, specifically, the vertical distance between the side of the blocking portion close to the substrate and the surface of the side of the first electrode away from the substrate can be 100nm, 101nm, 110nm, 115nm, 120nm, 130nm, 150nm, 188nm, 200nm, and the like, and the present application is not particularly limited, and only needs to be greater than or equal to the thickness of the hole injection layer 23.
In a possible embodiment, the barrier portion extends from the sidewall of the sub-pixel opening 31 to a direction away from the sub-pixel opening to form a groove structure 5, and the groove structure 5 is distributed around the circumference of the sidewall of the sub-pixel opening 31 and is disposed close to the first electrode. The vertical distance between the side of the groove structure 5 close to the substrate 1 and the surface of the first electrode 21 away from the substrate 1 in the direction perpendicular to the substrate 1 is greater than or equal to the thickness of the hole injection layer 23.
In the above embodiments, referring to fig. 2 and fig. 3, the shape of the sub-pixel opening 31 along the cross section perpendicular to the substrate 1 is a trapezoid, and the barrier is a structural schematic diagram of the groove structure 5; the groove structure 5 is formed on the side wall of the sub-pixel opening 31, the opening of the groove structure 5 faces the sub-pixel opening 31, the minimum distance between the side of the groove structure 5 close to the substrate 1 and the surface of the side of the first electrode 21 away from the substrate 1 is greater than or equal to the thickness of the hole injection layer 23 along the direction perpendicular to the substrate 1, the minimum distance between the opening of the groove structure 5 and the side wall of the groove structure 5 far away from the opening is greater than or equal to the thickness of the hole injection layer 23 along the horizontal direction parallel to the substrate, so that at least the hole injection layer 23 is disconnected at the groove structure 5 when the first carrier layer is formed, and the groove structure 5 is arranged around the circumference of the sub-pixel opening 31, so that the hole injection layer 23 can be disconnected into a part completely located in the sub-pixel opening 31 and a part located on the side of the pixel defining layer 3 away from the substrate 1, therefore, current can be effectively prevented from being transmitted between at least part of the adjacent light emitting units through the hole injection layer 23, and light emitting crosstalk between at least part of the adjacent light emitting units can be prevented.
In a possible embodiment, the distance between the side walls of the groove structures 5 is uniform in a direction perpendicular to the substrate 1, thereby facilitating the manufacture of the groove structures 5.
In a possible embodiment, along the direction perpendicular to the substrate 1, the side wall of the groove structure 5 close to the substrate 1 is parallel to the surface of the side of the substrate 1 facing the pixel definition layer 3, and the side wall of the groove structure 5 away from the substrate 1 is parallel to the surface of the side of the substrate 1 facing the pixel definition layer 3, so as to facilitate the manufacture of the groove structure 5.
In other possible embodiments, the distance between the sidewalls of the groove structure 5 along the direction perpendicular to the substrate 1 may be different, that is, the sidewall of the groove structure 5 near the substrate 1 is not parallel to the sidewall of the groove structure 5 far from the substrate 1, so that the distance between the two sidewalls of the groove structure 5 is different, and the present application is not limited thereto.
In one possible embodiment, the barrier structure includes a barrier portion extending from a sidewall of the sub-pixel opening 31 to a direction close to the sub-pixel opening 31 to form a protruding structure 4, and the protruding structures 4 are distributed around a circumference of the sidewall of the sub-pixel opening 31. And the minimum distance that the protrusion structure 4 protrudes from the side wall of the sub-pixel opening 31 along the horizontal direction parallel to the substrate is greater than the thickness of the hole injection layer 23, so that at least the hole injection layer 23 on the side wall of the sub-pixel opening 31 can be isolated to prevent crosstalk between adjacent light emitting units.
Referring to fig. 4 and 5, the cross section of the sub-pixel opening 31 along the direction perpendicular to the substrate 1 is a trapezoid, and the barrier portion is a protrusion structure 4. In the above embodiment, the projection structures 4 are annularly distributed around the circumference of the sidewall of the sub-pixel opening 31. And along the direction perpendicular to the substrate 1, the minimum distance between one side of the protruding structure 4 close to the substrate 1 and the surface of one side of the first electrode away from the substrate is greater than or equal to the thickness of the hole injection layer 23, so that when the hole injection layer 23 is formed, the hole injection layer 23 is blocked by the blocking part. In the sub-pixel opening provided with the blocking part, the hole injection layer 23 is disconnected to form an independent part which is positioned in the sub-pixel opening 31 and is in contact with the first electrode 21, so that the hole injection layers 23 which are partially positioned in the adjacent light-emitting units are not continuous, current is prevented from being transmitted between the adjacent light-emitting units through the hole injection layers 23, and light-emitting crosstalk between the adjacent light-emitting units is prevented.
In the above embodiment, when the minimum distance between the side of the protrusion structure 4 close to the substrate 1 and the surface of the first electrode on the side away from the substrate is equal to the thickness of the hole injection layer 23 along the direction perpendicular to the substrate 1, when the hole injection layer 23 is formed by evaporation through an evaporation device, the evaporation material for forming the hole injection layer 23 by evaporation is blocked by the protrusion structure 4, and is partially evaporated on the side of the pixel definition layer 3 away from the substrate and partially evaporated on the side of the first electrode 21 away from the substrate 1, and the hole injection layer on the side of the pixel definition layer 3 away from the substrate 1 is disconnected from the hole injection layer on the side of the first electrode 21 away from the substrate 1, so that the hole injection layer 23 between adjacent light-emitting units is discontinuous. The protruding structure 4 can effectively block the hole injection layer 23, so that adjacent light emitting units on two sides of the protruding structure 4 are not affected by each other.
When the minimum distance between the side of the protruding structure 4 close to the substrate 1 and the surface of the first electrode away from the substrate is greater than the thickness of the hole injection layer 23 along the direction perpendicular to the substrate 1, the hole injection layer 23 can be blocked, and the hole transport layer and the electron blocking layer on the hole injection layer 23 can be blocked at the same time, so as to further prevent crosstalk between adjacent light emitting units.
In one possible embodiment, as shown in fig. 6, 7 and 8, the barrier structure includes a barrier layer 6, and the barrier layer 6 is used to crack the first charge carrier layer in contact with the barrier layer 6, that is, the barrier layer 6 can crack the first charge carrier layer in contact with the barrier layer 6 to fail, so that current transmission in the first charge carrier layer is discontinuous to prevent crosstalk between adjacent light emitting units.
In one possible embodiment, as shown in fig. 6 and 7, the barrier layers 6 are disposed on the sidewalls of the sub-pixel openings and distributed annularly around the circumference of the sidewalls of the sub-pixel openings 31, the barrier layers 6 are at least located on one side close to the substrate, and the side of the barrier layers 6 facing away from the substrate is spaced apart from the first electrode 21 by a distance greater than or equal to the thickness of the hole injection layer, so that partial regions in other regions in the hole injection layer 24 can be isolated without affecting each other while ensuring that the portion of the hole injection layer 24 covered by the light-emitting material layer 22 is effective, specifically, when the hole injection layer 23 is formed by evaporation through an evaporation apparatus, the evaporation material is partially evaporated on the side of the pixel defining layer 3 facing away from the substrate, partially evaporated on the side of the first electrode facing away from the substrate, partially evaporated on the surface of the barrier layers 6, and the evaporation material on the surface of the barrier layers 6 is reacted with the barrier layers 6 to crack and fail (portion a in the figure), therefore, the current in the hole injection layer 23 cannot pass through the hole injection layer 23 (part a in the figure) in contact with the barrier layer, so that the current between the hole injection layer 23 on the side of the first electrode away from the substrate and the current between the hole injection layer 23 on the side of the pixel defining layer 3 away from the substrate are independent, and further, the adjacent light-emitting units are not influenced by each other.
In another possible embodiment, as shown in fig. 8, the blocking layer 6 is disposed on a side of the pixel defining layer 3 away from the substrate 1, and the blocking layer 6 is disposed close to the sub-pixel opening, so as to block at least a portion (portion a in the figure) of the hole injection layer that is located close to the sub-pixel opening, when the hole injection layer 23 is formed by evaporation through an evaporation apparatus, an evaporation material located on a surface of the blocking layer 6 is cracked and failed after acting on the blocking layer 6, so that a current in the hole injection layer 23 cannot pass through the hole injection layer (portion a in the figure) that is in contact with the blocking layer, so that a lateral transfer of the current is blocked at the blocking layer, and thus adjacent light emitting units are not affected by each other, when the blocking layer 6 is formed on a side of the pixel defining layer 3 away from the substrate 1, the blocking layer 6 is close to the sub-pixel opening, which helps to block continuity of a film layer between the adjacent light emitting units, the yield of the light-emitting unit is further ensured; and the barrier layer 6 is formed on the side of the pixel defining layer 3 departing from the substrate 1, and the barrier layer 6 is prepared without being prepared in the sub-pixel opening 31, so that the manufacturing process is simpler.
In a possible embodiment, the barrier layer 6 is a P-type organic material, and the barrier layer 6 formed by using the P-type organic material interacts with the hole injection layer 23 to form a heavy doping after being directly contacted, which may cause cracking failure of the hole injection layer (part a in the figure) in contact with the barrier layer.
In another possible embodiment, the barrier layer 6 is an organic glue containing iodine, and the material of the organic glue is polysiloxane, poly-cinnamic acid or phenolic resin.
In one possible embodiment, the barrier layer is an organic glue containing iodine, which evaporates when heated to enter the hole injection layer and interact with the hole injection layer, causing the hole injection layer (part a in the figure) in contact with the barrier layer to crack and fail.
In the display panel provided in the present application, the first electrode is an anode, the second electrode is a cathode, and the first electrode may be a cathode and the second electrode may be an anode.
The application also provides a display device, and this display device can be cell-phone, bracelet, computer display screen, on-vehicle display screen etc. and this application does not do the injecing, and this display device's display effect is good, can not appear because of the condition that the luminous crosstalk appears abnormal display between the adjacent luminescence unit.
As will be apparent to those skilled in the art, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Claims (13)
1. A display panel, comprising:
a substrate;
the pixel definition layer is arranged on one side of the substrate and comprises a plurality of sub-pixel openings penetrating through the pixel definition layer along the thickness direction;
the light-emitting element layer at least comprises light-emitting units of three colors, the light-emitting units are arranged in the sub-pixel openings in a one-to-one correspondence mode, each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode, the first electrode, the light-emitting layer and the second electrode are located on the substrate, and the light-emitting layer comprises a light-emitting material layer and a first carrier layer located on one side, away from the substrate, of the first electrode;
and the pixel definition layer is provided with a blocking structure, and at least part of the first current carrier layer is blocked by the blocking structure.
2. The display panel of claim 1, wherein the first charge carrier layer comprises at least one of a hole injection layer, a hole transport layer, and an electron blocking layer.
3. The display panel according to claim 2, wherein the barrier structure comprises a barrier portion, the barrier portion is disposed on a sidewall of the sub-pixel opening, and a vertical distance between a side of the barrier portion close to the substrate and a surface of the first electrode facing away from the substrate in a direction perpendicular to the substrate is greater than or equal to a thickness of the hole injection layer.
4. The display panel according to claim 3, wherein the barrier portion extends from a sidewall of the sub-pixel opening to a direction close to the sub-pixel opening to form a convex structure;
in the horizontal direction parallel to the substrate, the minimum distance of the protrusion structure protruding out of the side wall of the sub-pixel opening is larger than the thickness of the hole injection layer;
or the barrier part extends from the side wall of the sub-pixel opening to the direction far away from the sub-pixel opening to form a groove structure.
5. The display panel of claim 3, wherein the barriers are distributed around a circumference of the sidewalls of the sub-pixel openings.
6. The display panel according to claim 3, wherein a vertical distance between a side of the barrier portion close to the substrate and a surface of the first electrode facing away from the substrate is 100nm to 200 nm.
7. The display panel of claim 2, wherein the barrier structure comprises a barrier layer for cleaving the first charge carrier layer in contact with the barrier layer;
the barrier layer is arranged on the side wall of the sub-pixel opening; and/or the presence of a gas in the gas,
the blocking layer is arranged on one side, away from the substrate, of the pixel defining layer.
8. The display panel according to claim 7, wherein when the barrier layer is disposed on the sidewall of the sub-pixel opening, the barrier layer is circumferentially distributed around the sidewall of the sub-pixel opening, the barrier layer is at least located at a side close to the substrate, and a distance from a side of the barrier layer facing away from the substrate to the first electrode is greater than or equal to a thickness of the hole injection layer; and/or the blocking layer is arranged on one side, away from the substrate, of the pixel defining layer and is close to the sub-pixel opening.
9. The display panel according to claim 7, wherein the barrier layer is a P-type organic material.
10. The display panel of claim 7, wherein the barrier layer is an organic glue containing iodine, and the material of the organic glue is polysiloxane, a poly-cinnamic acid or a phenolic resin.
11. The display panel according to claim 1, wherein the light-emitting element layer includes at least a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit, wherein at least a pixel defining layer corresponding to the blue light-emitting unit in the pixel defining layer is provided with the barrier structure.
12. The display panel according to claim 1, wherein the light-emitting layer further comprises a second carrier layer on a side of the light-emitting material layer facing away from the substrate, the second carrier layer comprising at least one of an electron injection layer, an electron transport layer, and a hole blocking layer.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120924213.9U CN214588861U (en) | 2021-04-29 | 2021-04-29 | Display panel and display device |
Applications Claiming Priority (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093512A1 (en) * | 2021-11-29 | 2023-06-01 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
| WO2023104104A1 (en) * | 2021-12-08 | 2023-06-15 | 纳晶科技股份有限公司 | Light-emitting device and preparation method therefor, and electronic device comprising light-emitting device |
| WO2024000489A1 (en) * | 2022-06-30 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and preparation method therefor, and display apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093512A1 (en) * | 2021-11-29 | 2023-06-01 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
| GB2621788A (en) * | 2021-11-29 | 2024-02-21 | Boe Technology Group Co Ltd | Display panel and display apparatus |
| WO2023104104A1 (en) * | 2021-12-08 | 2023-06-15 | 纳晶科技股份有限公司 | Light-emitting device and preparation method therefor, and electronic device comprising light-emitting device |
| WO2024000489A1 (en) * | 2022-06-30 | 2024-01-04 | 京东方科技集团股份有限公司 | Display panel and preparation method therefor, and display apparatus |
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