CN110137383A - A kind of production method of display panel and display panel - Google Patents
A kind of production method of display panel and display panel Download PDFInfo
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- CN110137383A CN110137383A CN201910551228.2A CN201910551228A CN110137383A CN 110137383 A CN110137383 A CN 110137383A CN 201910551228 A CN201910551228 A CN 201910551228A CN 110137383 A CN110137383 A CN 110137383A
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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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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Abstract
The invention discloses the production methods of a kind of display panel and display panel.The display panel includes substrate, and is stacked the first electrode in substrate surface, light emitting functional layer, second electrode and light removing layer；At least one layer in light emitting functional layer and light removing layer includes polymer and the scattering crystallite being distributed in polymer, and scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of small molecule material is less than the crystallization temperature of polymer, and the molal weight of small molecule material is less than or equal to 1000g/mol.At least one layer in light emitting functional layer and light removing layer includes polymer and the scattering crystallite being distributed in polymer, so that the emergent light of display panel when scattering crystallite by scattering, the light of the injection of display panel more disperses, to increase light quantity when big visual angle, reduce the light attenuation under big visual angle, luminance difference of the light of different colours at big visual angle is reduced, the color offset phenomenon of display panel under big visual angle is improved.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of production sides of display panel and display panel
Method.
Background technique
With the development of display technology, people for display panel display performance require it is higher and higher, however as with
The visual angle that display panel is watched at family increases, and the display picture of display panel can generate colour cast.
Summary of the invention
The present invention provides the production method of a kind of display panel and display panel, to improve the colour cast at the big visual angle of display panel
Phenomenon.
In a first aspect, the embodiment of the invention provides a kind of display panels, comprising:
Substrate, and be stacked the first electrode in the substrate surface, light emitting functional layer, second electrode and light and take out
Layer；
At least one layer in the light emitting functional layer and the smooth removing layer includes polymer and is distributed in the polymerization
Scattering crystallite in object, the scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of the small molecule material
Less than the crystallization temperature of the polymer, and the molal weight of the small molecule material is less than or equal to 1000g/mol.
Optionally, the light emitting functional layer includes the hole transmission layer, luminescent layer and electron transfer layer being stacked, described
Hole transmission layer is set to the luminescent layer adjacent to the side of the first electrode；The hole transmission layer, luminescent layer and electronics
At least one layer in transport layer includes polymer and the scattering crystallite being distributed in the polymer.
Optionally, the mass percent of the small molecule material is 0.1%-10%.
Optionally, it is described scattering crystallite size be 30nm-300nm, it is preferable that it is described scattering crystallite size be
100nm。
Optionally, the small molecule material in the smooth removing layer is bis- [N, N- bis- (p-methylphenyl) benzene of 4 '-cyclohexylidenes
Amine], the polymer in the smooth removing layer is bromo polymethylacrylic acid or polyimides.
Optionally, the roughness on the surface of the smooth removing layer is greater than or equal to 10nm.
Optionally, display panel further include:
Scattering layer；The scattering layer is set to the side of the smooth removing layer far from the second electrode.
Optionally, display panel further include:
Encapsulated layer, the encapsulated layer are set between the smooth removing layer and the scattering layer.
Second aspect, the embodiment of the invention also provides a kind of production methods of display panel, comprising:
One substrate is provided；
First electrode, light emitting functional layer, second electrode and light removing layer are sequentially formed in the substrate surface；
At least one layer in the light emitting functional layer and the smooth removing layer includes polymer and is distributed in the polymerization
Scattering crystallite in object, the scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of the small molecule material
Less than the crystallization temperature of the polymer, and the molal weight of the small molecule material is less than or equal to 1000g/mol.
Optionally, first electrode, light emitting functional layer, second electrode and light removing layer are sequentially formed in the substrate surface,
Include:
Cured layer is formed using inkjet printing mode；Wherein, the ink of inkjet printing includes small molecule material and polymer；
Thermal anneal process is carried out to the cured layer, small molecule material is made to form scattering crystallite.
The technical solution of the embodiment of the present invention, display panel include substrate, and are stacked first in substrate surface
Electrode, light emitting functional layer, second electrode and light removing layer.At least one layer in light emitting functional layer and light removing layer includes polymer
And it is distributed in the scattering crystallite in polymer, so that the emergent light of display panel is shown by scattering when scattering crystallite
The light of the injection of panel more disperses, so that light quantity when increasing big visual angle, reduces the light quantity by second electrode vertical exit,
The light attenuation under big visual angle is reduced, luminance difference of the light of different colours at big visual angle is reduced, improves and is shown under big visual angle
Show the color offset phenomenon of panel.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of display panel provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another display panel provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another display panel provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another display panel provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Fig. 6 is a kind of flow chart of the production method of display panel provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
In the prior art, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display panel
Top light emitting structure is mostly used greatly, and this light emitting structure has the advantages that excitation purity is high, high-efficient.Pushing up light emitting structure includes microcavity,
Light can generate microcavity effect in microcavity, enhance the light of specific wavelength on the direction perpendicular to display panel,
To enhance the luminous intensity of OLED in display panel.But when observation visual angle increases, light is sent out under the action of microcavity
Raw decaying, and the light luminance rate of decay that the luminescence unit of different colours issues under the effect of corresponding microcavity is different, thus
Colour cast is generated under big visual angle.
Based on the above issues, the embodiment of the invention provides a kind of display panels.Fig. 1 is provided in an embodiment of the present invention one
The structural schematic diagram of kind display panel.As shown in Figure 1, display panel includes substrate 110, and it is stacked in 110 table of substrate
First electrode 120, light emitting functional layer 130, second electrode 140 and the light removing layer 150 in face.Light emitting functional layer 130 and light take out
At least one layer in layer 150 includes that (Fig. 1 schematically illustrates light for polymer and the scattering crystallite 10 being distributed in polymer
Removing layer 150 includes polymer and the scattering crystallite 10 being distributed in polymer), scattering crystallite 10 is crystallized by small molecule material
It is formed.Wherein, the crystallization temperature of small molecule material is less than the crystallization temperature of polymer, and the molal weight of small molecule material is less than
Or it is equal to 1000g/mol.
Specifically, light emitting functional layer 130 may include multilayered structure, for example including hole transmission layer, luminescent layer and electronics
Transport layer.Every layer of structure can be formed by doping, and any one layer, two or more layers in light emitting functional layer 130 can use
The form of distribution scattering crystallite 10 in polymer.First electrode 120, light emitting functional layer 130 and second electrode 140 form microcavity.
When display panel is emission structure at top, first electrode 120 can be anode, and second electrode 140 can be cathode.Second electrode
Light emission side of 140 sides far from first electrode 120 as display panel.
By choosing small molecule material and polymer, and the crystallization temperature of small molecule material is less than the crystallization temperature of polymer
Degree, can by control temperature realize small molecule material prior to polymer crystallization, thus guarantee small molecule material crystallize to be formed it is scattered
Crystallite 10 is penetrated, and polymer is not in crystallization, forms the structure of distribution scattering crystallite 10 in film layer.130 He of light emitting functional layer
At least one layer in light removing layer 150 is the structure of distribution scattering crystallite 10 in polymer, when the light of display panel be incident upon it is scattered
When penetrating crystallite 10, light scatters on scattering crystallite 10, so that the light of display panel outgoing more disperses, to increase
Light quantity when big visual angle reduces the light quantity that vertical second electrode 140 is emitted, therefore the light reduced under big visual angle declines
Subtract, reduces luminance difference of the light of different colours at big visual angle, improve the color offset phenomenon of display panel under big visual angle.
Illustratively, when light removing layer 150 includes polymer and the scattering crystallite 10 being distributed in polymer, light
After being emitted by second electrode 140, by being scattered when the scattering crystallite 10 of light removing layer 150, so that the injection of light removing layer 150
Light more disperse, thus light quantity when increasing big visual angle, reduce the light quantity that vertical second electrode 140 is emitted, reduce
Light attenuation under big visual angle, reduces luminance difference of the light of different colours at big visual angle, improves and show under big visual angle
The color offset phenomenon of panel.
Fig. 2 is the structural schematic diagram of another display panel provided in an embodiment of the present invention.As shown in Fig. 2, light emitting functional layer
130 include polymer and the scattering crystallite 10 being distributed in polymer, and in microcavity, light passes through light emitting functional layer 130
It is scattered when scattering crystallite 10, so that the direction of the light of microcavity outgoing is more dispersed, can equally improve and be shown under big visual angle
Show the color offset phenomenon of panel.
It should be noted that in other embodiments, light emitting functional layer 130 and light removing layer 150 can include polymerization
Object and small molecule material crystallize the scattering crystallite 10 to be formed, and light emitting functional layer 130 and light removing layer 150 are to display panel at this time
Emergent light have scattering process, so as to further improve the color offset phenomenon of display panel under big visual angle.
The technical solution of the present embodiment, display panel include substrate, and be stacked the first electrode in substrate surface,
Light emitting functional layer, second electrode and light removing layer.At least one layer in light emitting functional layer and light removing layer include polymer and
The scattering crystallite being distributed in polymer scatters, display panel when so that the emergent light of display panel is by scattering crystallite
The light of injection more disperse, so that light quantity when increasing big visual angle, reduces the light quantity of vertical second electrode outgoing, reduces
Light attenuation under big visual angle, reduces luminance difference of the light of different colours at big visual angle, improves display surface under big visual angle
The color offset phenomenon of plate.
Based on the above technical solution, Fig. 3 is that the structure of another display panel provided in an embodiment of the present invention is shown
It is intended to.As shown in figure 3, light emitting functional layer 130 includes hole transmission layer 131, luminescent layer 132 and the electron transfer layer being stacked
133, hole transmission layer 131 is set to luminescent layer 132 adjacent to the side of first electrode 120, hole transmission layer 131, luminescent layer 132
It include that (Fig. 3 shows for polymer and the scattering crystallite 10 being distributed in the polymer at least one layer in electron transfer layer 133
Show the scattering crystallite 10 that hole transmission layer 131 includes polymer and is distributed in polymer to example property).
Specifically, hole transmission layer 131, luminescent layer 132 and electron transfer layer 133 all can be adulterate the film layer of formation,
Therefore the film layer structure of distribution scattering crystallite 10 in polymer can be formed.When hole transmission layer 131, luminescent layer 132 and electronics
When at least one layer in transport layer 133 includes polymer and the scattering crystallite 10 being distributed in polymer, the light of display panel
When line is incident upon scattering crystallite 10, light scatters on scattering crystallite 10, so that the light of display panel outgoing more disperses.
Therefore as the increase at visual angle, the decaying of light reduce, the color offset phenomenon of display panel under big visual angle is improved.
It should be noted that in other embodiments, any one layer in luminescent layer 132 and electron transfer layer 133 can also
To include polymer and the scattering crystallite 10 being distributed in polymer, it can equally improve the colour cast of display panel under big visual angle
Phenomenon.In addition, when two layers or three layers in hole transmission layer 131, luminescent layer 132 and electron transfer layer 133 includes polymer
And when being distributed in the scattering crystallite 10 in polymer, the light that can further make display panel be emitted more disperses, from
And it can further improve the color offset phenomenon of display panel under big visual angle.
On the basis of above-mentioned each technical solution, the mass percent of small molecule material is 0.1%-10%.
Specifically, the mass percent of small molecule material is all material of the quality of small molecule material and film layer where it
Quality and ratio.For example, scattering crystallite when light removing layer includes polymer and the scattering crystallite being distributed in polymer
It is crystallized and is formed by small molecule material, the mass percent of small molecule material is that the quality of small molecule material accounts for light removing layer gross mass
Percentage.
When the mass percent of small molecule material is too small, the scattering crystallite that small molecule material is formed is very few, scatters crystallite
Weaker to the scattering process of light, the light dispersion of display panel outgoing at this time is poor.When the quality hundred of small molecule material
Point than it is too big when, small molecule material formed scattering crystallite it is excessive, scattering crystallite formed crystalline region, crystalline region make scatter crystallite progress
The surface of scattering is greatly reduced, to reduce the scattering process of scattering crystallite.By the quality hundred that small molecule material is arranged
Divide than being 0.1%-10%, can both guarantee that small molecule material crystallized the scattering crystallite to be formed and excessively will not form crystalline region, and keep away
Exempting from crystalline region reduces the scattering process of light, it can also be ensured that small molecule material crystallizes the scattering crystallite to be formed will not be very few, guarantees
The scattering strength of scattering crystallite, so as to preferably improving the color offset phenomenon of display panel under big visual angle.
On the basis of above-mentioned each technical solution, the size for scattering crystallite is 30nm-300nm, it is preferable that the scattering is micro-
Brilliant size is 100nm.
Specifically, the size for scattering crystallite is used to indicate the size of scattering crystallite, and illustratively, the size for scattering crystallite can
Think the linear distance between the most portionafrom theasurface two o'clock of scattering crystallite.When the mass percent of small molecule material determines, i.e. shape
It is determined at the quality of the small molecule material of scattering crystallite.If undersized, each scattering of formation of the scattering crystallite formed
The scattering process of crystallite is poor, and the whole scattering process for scattering crystallite is also poor.If the size of the scattering crystallite formed
Excessive, the quantity for the scattering crystallite that the small molecule material of fixed mass is formed is very little, so that scattering crystallite entirety scattering process
It is poor.Size by setting scattering crystallite is 30nm-300nm, can both guarantee that each scattering crystallite had and dissipate well
The effect of penetrating, while, so that the quantity of scattering crystallite is very little, can ensure that scattering crystallite is whole to avoid the oversized of scattering crystallite
The scattering strength of body improves display surface under big visual angle so that the film layer where scattering crystallite has good scattering process
The color offset phenomenon of plate.
It should be noted that small molecule material can be made to crystallize to form scattering crystallite by thermal anneal process.Thermal annealing work
The annealing temperature of skill and annealing temperature retention time can change the size of the scattering crystallite formed when small molecule material crystallization.It moves back
Fiery temperature is more lower than the crystallization temperature of small molecule material, and the annealing temperature retention time is longer, and small molecule material, which crystallizes, to be formed
It is bigger to scatter crystallite.In the case where the mass percent of small molecule material is certain, it is micro- that small molecule material crystallizes the scattering to be formed
Brilliant bigger, the quantity for scattering crystallite is fewer.Under normal circumstances, can by setting annealing temperature and annealing temperature retention time,
So that the size of scattering crystallite is 30nm-300nm.
Preferably, the size for scattering crystallite can be 100nm, and individually scattering crystallite has good scattering process at this time,
The quantity for the scattering crystallite being formed simultaneously will not be very little, thus ensure that scattering crystallite integrally has good scattering strength,
So that the film layer where scattering crystallite has good scattering process, the color offset phenomenon of display panel under big visual angle is improved.Show
Example property, small molecule material crystallization temperature is 80 DEG C, in thermal anneal process, annealing temperature can be set lower than 80 DEG C, anneal
Temperature hold-time can be set to 1-60min.In order to make the size for scattering crystallite in 30nm-300nm, annealing can be set
Temperature is 60 DEG C -70 DEG C, and the annealing temperature retention time is 1-10min, to realize the size and number of scattering crystallite suitable
In the range of, it ensure that the scattering strength of scattering crystallite entirety.
It should be noted that polymer and small molecule material can pass through inkjet printing before carrying out thermal anneal process
Mode forms film layer.The quality of small molecule material and polymer can be determined according to the mass percent of small molecule material, and lead to
It crosses the form preparation being blended and ink is blended, ink printed film forming layer then will be blended by way of inkjet printing.
On the basis of above-mentioned each technical solution, the small molecule material in light removing layer is bis- [N, the N- bis- of 4 '-cyclohexylidenes
(p-methylphenyl) aniline], the polymer in light removing layer is bromo polymethylacrylic acid or polyimides.
Specifically, can be set the refractive index of light removing layer range be 1.8-2.2, thus guarantee light removing layer have compared with
Good light takes out effect.The refractive index of bromo polymethylacrylic acid is greater than 1.62, and the refractive index of polyimides is greater than 1.83, because can be with
Guarantee light removing layer refractive index with higher, so that there is light removing layer preferable light to take out effect.Form scattering crystallite
Small molecule material can be bis- [N, N- bis- (p-methylphenyl) aniline] for 4 '-cyclohexylidenes, the process control height of crystallization, can be with
The size and number for the scattering crystallite that preferable control is formed, to guarantee that light removing layer has preferable scattering process.
It should be noted that the small molecule material of above-mentioned formation scattering crystallite is only a kind of example, rather than limit.Scattering
Crystallite can crystallize to be formed for a kind of small molecule material, or a variety of small molecule material mixed crystallizations are formed, at this time can be with
According to crystallization it needs to be determined that the mass percent of various small molecule materials.
On the basis of above-mentioned each technical solution, with continued reference to Fig. 3, the roughness on the surface of light removing layer 150 be greater than or
Equal to 10nm.
Specifically, the surface of light removing layer 150 and substrate 110 includes opposite first surface 151 and second surface 152.
Roughness is bigger, and first surface 151 and second surface 152 are more unsmooth, and first surface 151 and second surface 152 are to light
Scattering process is stronger, so that the light that light removing layer 150 projects more disperses, shows under big visual angle to preferably improve
The color offset phenomenon of panel.Roughness can be obtained by surface roughness measuring instrument, such as can pass through step instrument or atom
Force microscope etc..When the roughness of first surface 151 and second surface 152 is greater than or equal to 10nm, light removing layer 150 dissipates
The effect of penetrating is stronger.Under normal circumstances, the roughness of first surface 151 and second surface 152 can be by adjusting light removing layer
150 formation process parameter regulation.
It should be noted that the roughness that a surface in first surface 151 and second surface 152 can be set is greater than
Or it is equal to 10nm, to improve the dispersion degree of the light of the injection of light removing layer 150.Furthermore it is also possible to which the coarse of two surfaces is arranged
Degree is all larger than or is equal to 10nm, and the dispersion degree of the light of the injection of light removing layer 150 can be further improved.
Fig. 4 is the structural schematic diagram of another display panel provided in an embodiment of the present invention.As shown in figure 4, display panel
It further include scattering layer 160.Scattering layer 160 is set to side of the light removing layer 150 far from second electrode 140.
Specifically, scattering layer 160 has scattering process, so that the emergent light of display panel occurs when passing through scattering layer 160
Scattering disperses light more to increase the exit direction of the light of display panel injection, thus when increasing big visual angle
Light quantity reduces the light attenuation under big visual angle, reduces luminance difference of the light of different colours at big visual angle, improves big visual angle
The color offset phenomenon of lower display panel.
Optionally, the refractive index of scattering layer 160 is greater than 1.5, to guarantee the scattering process of scattering layer 160.Illustratively, it dissipates
Penetrating layer 160 can be includes the polymer of high-refractive index particulate ball, such as scattering layer 160 is to contain ZrO in silicon resin copolymer2
The film layer of particle, ZrO2Particle has good scattering process, guarantees that scattering layer 160 has preferable scattering process to light.
With continued reference to Fig. 4, display panel further includes encapsulated layer 170.Encapsulated layer 170 is set to light removing layer 150 and scattering
Between layer 160.
It specifically, can be by the refractive index of adjusting scattering layer 160 and encapsulated layer 170, so that the refractive index of scattering layer 160
Less than the refractive index of encapsulated layer 170, thus when the emergent light for reducing display panel is incident upon air refractive index difference, so as to
The total reflection that light occurs when projecting display panel is reduced, to increase the light extraction efficiency of display panel.
The present embodiment also provides a kind of display device.Fig. 5 is a kind of structure of display device provided in an embodiment of the present invention
Schematic diagram.As shown in figure 5, the display device 50 includes the display panel 51 that any embodiment of that present invention provides.
The present embodiment also provides a kind of production method of display panel.Fig. 6 is a kind of display provided in an embodiment of the present invention
The flow chart of the production method of panel.As shown in fig. 6, this method comprises:
S410, a substrate is provided；
S420, first electrode, light emitting functional layer, second electrode and light removing layer are sequentially formed in substrate surface；
At least one layer in light emitting functional layer and light removing layer includes that polymer and the scattering being distributed in polymer are micro-
Crystalline substance, scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of small molecule material is less than the crystallization temperature of polymer
Degree, and the molal weight of small molecule material is less than or equal to 1000g/mol.
Specifically, light emitting functional layer may include the hole transmission layer, luminescent layer and electron transfer layer being stacked, hole
Transport layer is set to side of the luminescent layer adjacent to first electrode.
The technical solution of the present embodiment, at least one layer in light emitting functional layer and light removing layer includes polymer and distribution
Scattering crystallite in polymer, so that the emergent light of display panel when scattering crystallite by scattering, display panel is penetrated
Light out more disperses, so that light quantity when increasing big visual angle, reduces the light quantity by second electrode vertical exit, reduces big view
Light attenuation under angle reduces luminance difference of the light of different colours at big visual angle, improves display panel under big visual angle
Color offset phenomenon.
Optionally, first electrode, light emitting functional layer, second electrode and light removing layer are sequentially formed in substrate surface, specifically
Include:
Cured layer is formed using inkjet printing mode；Wherein, the ink of inkjet printing includes small molecule material and polymer.
Thermal anneal process is carried out to cured layer, small molecule material is made to form scattering crystallite.
Specifically, when at least one layer of light emitting functional layer and light removing layer includes polymer and is distributed in polymer
When scattering crystallite, then the film layer including polymer and the scattering crystallite being distributed in polymer can use inkjet printing mode
Form cured layer.The mass percent of the ink small molecular material of inkjet printing can be 0.1%-10%, can both guarantee
Small molecule material, which crystallizes the scattering crystallite to be formed, will not excessively form crystalline region, avoid crystalline region from reducing the scattering process of light, may be used also
Will not be very few to guarantee that small molecule material crystallizes the scattering crystallite to be formed, it ensure that the scattering strength of scattering crystallite.Pass through setting
Parameter in inkjet printing, the roughness of the film layer of adjustable formation.For example, it is opposite with substrate that light removing layer can be set
The roughness on surface is greater than or equal to 10nm, so that light is bigger in the surface scattering effect of light removing layer, so that light
The light that removing layer projects more disperses, and further improves the color offset phenomenon of display panel under big visual angle.
In addition, by annealing temperature and the adjusting of annealing temperature retention time to thermal annealing, so that the ruler of scattering crystallite
Very little is 30nm-300nm, it is preferable that the size for scattering crystallite is 100nm.In the certain feelings of the mass percent of small molecule material
Under condition, can both guarantee scatter crystallite have good scattering process, while can to avoid scattering crystallite it is oversized so that
The quantity for scattering crystallite is very little, ensure that the scattering strength of scattering crystallite entirety, so that the film layer tool where scattering crystallite
There is good scattering process, improves the color offset phenomenon of display panel under big visual angle.Illustratively, the small molecule in light removing layer
Material is that 4 '-cyclohexylidenes are bis- [N, N- bis- (p-methylphenyl) aniline], and the polymer in light removing layer is bromo polymethyl
Acid or polyimides.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of display panel characterized by comprising
Substrate, and it is stacked the first electrode in the substrate surface, light emitting functional layer, second electrode and light removing layer；
At least one layer in the light emitting functional layer and the smooth removing layer includes polymer and is distributed in the polymer
Scattering crystallite, the scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of the small molecule material is less than
The crystallization temperature of the polymer, and the molal weight of the small molecule material is less than or equal to 1000g/mol.
2. display panel according to claim 1, which is characterized in that
The light emitting functional layer includes the hole transmission layer, luminescent layer and electron transfer layer being stacked, the hole transmission layer
The luminescent layer is set to adjacent to the side of the first electrode；In the hole transmission layer, luminescent layer and electron transfer layer
At least one layer includes polymer and the scattering crystallite being distributed in the polymer.
3. display panel according to claim 1, which is characterized in that the mass percent of the small molecule material is
0.1%-10%.
4. display panel according to claim 3, which is characterized in that the size of the scattering crystallite is 30nm-300nm,
Preferably, the size of the scattering crystallite is 100nm.
5. display panel according to claim 4, which is characterized in that the small molecule material in the smooth removing layer is 4 '-
Cyclohexylidene is bis- [N, N- bis- (p-methylphenyl) aniline], and the polymer in the smooth removing layer is bromo polymethylacrylic acid or gathers
Imines.
6. display panel according to claim 1, which is characterized in that the roughness on the surface of the smooth removing layer be greater than or
Equal to 10nm.
7. display panel according to claim 1, which is characterized in that further include:
Scattering layer；The scattering layer is set to the side of the smooth removing layer far from the second electrode.
8. display panel according to claim 7, which is characterized in that further include:
Encapsulated layer, the encapsulated layer are set between the smooth removing layer and the scattering layer.
9. a kind of production method of display panel characterized by comprising
One substrate is provided；
First electrode, light emitting functional layer, second electrode and light removing layer are sequentially formed in the substrate surface；
At least one layer in the light emitting functional layer and the smooth removing layer includes polymer and is distributed in the polymer
Scattering crystallite, the scattering crystallite is crystallized by small molecule material to be formed；Wherein, the crystallization temperature of the small molecule material is less than
The crystallization temperature of the polymer, and the molal weight of the small molecule material is less than or equal to 1000g/mol.
10. the production method of display panel according to claim 9, which is characterized in that in the substrate surface successively shape
At first electrode, light emitting functional layer, second electrode and light removing layer, comprising:
Cured layer is formed using inkjet printing mode；Wherein, the ink of inkjet printing includes small molecule material and polymer；
Thermal anneal process is carried out to the cured layer, small molecule material is made to form scattering crystallite.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110729407A (en) * | 2019-10-23 | 2020-01-24 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
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