CN108110146A - Flexible el device and preparation method thereof, flexible display apparatus - Google Patents
Flexible el device and preparation method thereof, flexible display apparatus Download PDFInfo
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- CN108110146A CN108110146A CN201711365906.3A CN201711365906A CN108110146A CN 108110146 A CN108110146 A CN 108110146A CN 201711365906 A CN201711365906 A CN 201711365906A CN 108110146 A CN108110146 A CN 108110146A
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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
- H10K50/805—Electrodes
- H10K50/82—Cathodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
Abstract
This application provides a kind of flexible el device and preparation method thereof, flexible display apparatus, the flexible el device, including flexographic cathode layer, the flexographic cathode layer is equipped with fexible film, the fexible film includes graphical slot, and carbon material is provided in the graphical slot.Flexible el device that the application provides and preparation method thereof, flexible display apparatus, not only meet the flexible characteristic requirement of flexible el device, also there is good resistance to deflection, fatigue durability and toughness, and conductivity is smaller with the increase variation of its elongation, can ensure that flexible el device can effectively stablize its electrical conductivity during dough deformation, avoid because the variation of flexographic cathode layer electrical conductivity and that flexible display apparatus is caused to show is uneven.
Description
Technical field
This application involves flexible display technologies field more particularly to a kind of flexible el device, its preparation method and
Flexible display apparatus.
Background technology
LED display is widely used in various places, becomes by advantages such as its efficient, reliable and stable, long lifespans
The main tool that mass information is propagated.LED light tube is increasingly miniaturized, and the resolution of LED display is made to improve rapidly, with reference to
The trend of HD video now makes LED display application field more and more wider.Development and demand with display screen, due to
Flexible display screen has the advantages that portability is strong, application scenarios are abundant, starts LED flexible display apparatus occur in the market.
Flexible el device is the existing main luminescent device of LED flexible display apparatus, such as QLED (Quantum
Dot Light Emitting Diodes, quanta point electroluminescent display device) or OLED (Organic Light-
Emitting Diode, organic elctroluminescent device).At present, common flexible el device includes stacking gradually
Flexible anode layer, hole transmission layer, electroluminescence layer, electron transfer layer and patterned cathode layer.Fig. 1 is to scheme in the prior art
The structure diagram of shape cathode layer.As shown in Figure 1, patterned cathode layer includes nano-silver thread 10 and fexible film 20.According to
The flexibility requirements of different flexible el devices, nano-silver thread 10 is embedded in fexible film 20 and forms required pattern,
Nano-silver thread 10 is used for the conduction of patterned cathode layer.
However, in above-mentioned flexible el device, since the resistance to deflection and fatigue durability of nano-silver thread 10 are poor,
And toughness is also poor, in the deformation such as the stretch bending of flexible el device repeatedly nano-silver thread 10 easily occur attenuating or
Fracture.Nano-silver thread 10, which attenuates or is broken, makes the impedance of patterned cathode layer raise significantly, so as to cause flexible el device
The electrical conductivity of part changes, and then causes the appearance display of LED flexible display apparatus uneven, influences LED flexible display apparatus
Quality and the service life.
The content of the invention
This application provides a kind of flexible el device, its preparation method and flexible display apparatus, in dough deformation
The electrical conductivity of flexible el device can effectively be stablized in the process, can effectively ensure that LED flexible display apparatus is shown uniformly.
In a first aspect, this application provides a kind of flexible el device, including flexographic cathode layer, feature
It is, the flexographic cathode layer includes fexible film, and the fexible film is equipped with graphical slot, in the graphical slot
It is provided with carbon material.
Second aspect, present invention also provides the preparation method of flexible el device, the preparation method include with
Lower step：
Hole transmission layer, electroluminescence layer and electron transfer layer are sequentially prepared on flexible anode layer；
The fexible film containing graphical slot is prepared on the electron transport layer；
The fexible film is immersed into carbon material solution, dry, the carbon material in the carbon material solution is filled in institute
It states in the graphical slot of fexible film, the carbon material forms flexographic cathode layer with the fexible film.
The third aspect, present invention also provides a kind of flexible display apparatus, the flexible display apparatus includes above-mentioned arbitrary
Flexible el device described in one；Or, prepared by the preparation method that the flexible display apparatus is included described in any one
Flexible el device.
Flexible el device that the application provides and preparation method thereof, flexible display apparatus, flexible el device
The flexographic cathode layer of part includes fexible film, is provided with graphical slot on fexible film, carbon is provided in graphical slot
Material, carbon material can form the carbon line being made of carbon material in graphical slot.The flexibility containing carbon material that the application provides
Patterned cathode layer makes full use of the satisfactory electrical conductivity and its characteristic that self is migrated in macromolecule of carbon material, makes flexibility
Patterned cathode layer meets the conductive requirement of flexible el device.Meanwhile by the carbon line that carbon material forms with good
Resistance to deflection, fatigue durability and toughness, and its conductivity is smaller with the increase variation of its elongation.In this way, carbon material and flexibility
The flexographic cathode layer that film combines to form not only meets the flexible characteristic requirement of flexible el device, also has
Good resistance to deflection, fatigue durability and toughness, and conductivity is smaller with the increase variation of its elongation, can ensure flexible electrical
Electroluminescence device can effectively stablize its electrical conductivity during dough deformation, avoid because of flexographic cathode layer electrical conductivity
Change and that flexible display apparatus is caused to show is uneven.
Description of the drawings
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure of patterned cathode layer in flexible el device in the prior art；
Fig. 2 is the cross section structure schematic diagram of flexible el device provided by the embodiments of the present application；
Fig. 3 is the structural representation of flexographic cathode layer in flexible el device provided by the embodiments of the present application
Figure；
Fig. 4 is the microcosmic knot of carbon nanotubes in flexographic cathode layer under undeformed state provided by the embodiments of the present application
Composition；
Fig. 5 is the microstructure of carbon nanotubes in flexographic cathode layer under deformed state provided by the embodiments of the present application
Figure；
Fig. 6 is the preparation method flow chart of flexible el device provided by the embodiments of the present application.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the object, technical solution and advantage for making the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and
It is not used in restriction the application.
Fig. 2 is the cross section structure schematic diagram of flexible el device provided by the embodiments of the present application, and Fig. 3 is real for the application
The structure diagram of graphing carbon nanotube flexible layer in the flexible el device of example offer is provided.
By attached drawing 2 and 3, it is known that, the flexible el device that the application provides, including the flexible anode layer stacked gradually
1st, hole transmission layer 2, electroluminescence layer 3, electron transfer layer 4 and flexographic cathode layer 5, flexible anode layer 1, hole transport
Layer 2, electroluminescence layer 3, the thickness of electron transfer layer 4 and flexographic cathode layer 5 are nano level, and usual thickness exists
Between 20-100nm.Flexographic cathode layer 5 includes fexible film 52, sets graphical slot on fexible film 52, graphically
Carbon material is set in slot, carbon material forms carbon line 51 in graphical slot, as shown in Figures 2 and 3, the carbon that such carbon material is formed
Line 51 forms flexographic cathode layer 5 as shown in Figures 2 and 3 with fexible film 52.
The graphic structure for the flexographic cathode layer 5 that Fig. 2 and 3 is shown is simply illustrative, not limited to this shape
Shape can form required pattern in fexible film 52, i.e., according to the flexibility and display requirement of different flexible el devices
Carbon material is formed to required 51 pattern of carbon line in fexible film.
The powder carbon materials such as carbon nanotubes, graphene, graphite can be selected in carbon material in the application, wherein it is preferred that carbon nanometer
Pipe.The carbon nanotubes is mainly made of several layers to tens of layers of coaxial pipe the carbon atom of hexagonal arrangement, light-weight, and six
Side shape structure connection is perfect, has many abnormal mechanics, electricity and chemical property, such as single-walled carbon nanotube and multi-wall carbon nano-tube
Pipe.
Electron-transport has ballistic transport performance to carbon nanotubes at room temperature, i.e. electron-transport will not along axial resistivity
It scatters.And the internal diameter of carbon nanotubes can be as small as several rans, and electronic band structure is more special, and wave vector is defined
In axial direction, quantum effect is particularly evident, can be used as quantum pipe, and electronics can run through without being blocked.
Carbon nanotubes is arbitrarily interted in graphical slot, crisscross, forms basic framework, while carbon nanotubes passes through model
De Huali is mutually adsorbed, and composition net structure is mutually linked between carbon nanotubes, entire conductive paper is made to form three dimensions conductive
System supports the conductive structure of entire flexographic cathode layer.Fig. 4 is carbon under the undeformed state of flexographic cathode layer
The microstructure schematic diagram of Nanotube alignment, Fig. 5 are the microcosmic of carbon nanotube arrangement under flexographic cathode layer deformed state
Structure diagram, black portions are carbon nanotubes in figure.In figures 4 and 5, carbon nanotubes in flexographic cathode layer always
Microscopic three-dimensional skeleton structure is kept, even if can also be tightly combined between carbon nanotubes under deformed state by Van der Waals force,
Under a degree of pulled out condition, therefore the skeleton only deformation that is formed of carbon nanotubes but not be mutually disengaged, it is mutual it
Between combination will not be broken, electronics can still transmit in carbon nanotubes, remain to the conductive need for meeting flexographic cathode layer
It asks.
In the application specific embodiment, carbon nanotubes mainly selects single-walled carbon nanotube, single defective tube
Less and with performances such as excellent electronics, machinery, mechanics, especially to electronics and hole all mobilities with superelevation.It is excellent
Choosing, purity is selected to be more than 85%, single wall carbon nano pipe purity is higher, and electric conductivity is better.
Fexible film 52 is that can carry out elastically-deformable film with elasticity, and the materials such as PDMS, PET, PI can be used and be made
Transparent flexible film.In the application specific embodiment, tetraethylene glycol transparent flexible film can be used.Specifically, tetraethylene glycol
As the raw material for making elastic film, added in tetraethylene glycol solution molecular weight for 70000-10000 polycaprolactones (PCL) and
The addition polymers of polypropylene glycol and ethylene oxide (Pluronic F-127), PCL, Pluronic F-127, the weight ratio of tetraethylene glycol
For 10-15:5-10:180-210 mixes in proportion above-mentioned material, and the bullet containing graphical slot is made using the material
Property film 52.
To fully ensure that the electric conductivity of flexographic cathode layer 5, flexographic cathode layer 5 further includes polyelectrolyte,
The polyelectrolyte overlays on the surface of the fexible film 52.And the process that fexible film 52 is usually formed in fexible film 52
In, surface will generate hole, and to make full use of the hole formed on fexible film 52, polyelectrolyte, which can be filled out, overlays on the hole
In hole.And the three dimensions conduction system of carbon nanotubes is combined with polyelectrolyte, has more fully ensured that flexographicization the moon
The electric conductivity of pole layer.Polyacrylic acid, two allyl of polymethylacrylic acid, polystyrolsulfon acid or poly dimethyl can be selected in polyelectrolyte
Ammonium chloride (PDDA) etc..
In the application specific embodiment, preferred polydimethyl diallyl ammonium chloride (PDDA), when elastic film 52
For tetraethylene glycol film when, there are some holes on elastic film 52, the polydimethyl diallyl ammonium chloride, which is filled out, to be overlayed on
In the surface hole defect of the fexible film 52.It is filled out in the surface hole defect of fexible film and covers polydimethyl diallyl ammonium chloride,
The electric conductivity of fexible film 52 will be greatly increased, and then help to improve the electron transfer rate of patterned cathode layer.
And when fexible film 52 is the addition polymers of tetraethylene glycol, polycaprolactone and polypropylene glycol and ethylene oxide composition
During fexible film, due to the facilitation of polycaprolactone and the addition polymers of polypropylene glycol and ethylene oxide, the flexible thin of formation
Film surface will have more uniform hole, and polydimethyl diallyl ammonium chloride and the hole on fexible film surface mutually promote
Into more helping to improve the electron transfer rate of flexographic cathode layer 5.And polydimethyl diallyl ammonium chloride layer
Polydimethyl diallyl ammonium chloride cooperates with the carbon material in carbon line 51 and carries out conduction, effectively avoids flexographicization cloudy
Carbon line 51 in pole layer 5 is more conducive to because deformation is stretched and is broken and ensures flexible el device deformation telescopic process
The conduction of middle flexographic cathode layer 5.
Can be flexibility QLED or OLED in flexible el device provided by the embodiments of the present application.When for flexibility
During QLED, flexible anode layer 1 is ito substrate, OTFT or PTFTs, and hole transmission layer 2 is immersion PEDOT：The flexible membrane of PSS, electricity
Electroluminescent layer 3 is in the quantum dot light emitting layers such as CdS, CdSe, CdS/ZnS, CdSe/ZnS or CdSe/CdS/ZnS, electron transfer layer
4 be LiF/Alq3.When for flexible OLED when, flexible anode layer 1 be ito substrate, OTFT or PTFTs, hole transmission layer 2 for immerse
PEDOT：The flexible membrane of PSS, electroluminescence layer 3 are 2- to the organic luminous layer of biphenyl -8-hydroxyquinoline zinc or other materials, electricity
Sub- transport layer 4 is Bebq2/Li3N.In the application specific embodiment, the flexible film material of hole transmission layer 2 may be selected with
The material identical of fexible film 52 in flexographic cathode layer.
To verify the performance of the patterned cathode layer 5 in the embodiment of the present application, by the process of patterned cathode layer 5 stretching repeatedly
Long and bending measures the resistance of the flexographic cathode layer 5 in the application, e.g., nature flexographic cathode layer 5
Resistance for 3 × 104 Ω, when elongation is 1.2, resistance rise is original 1.5 times；When elongation is 1.5, resistance rise is
Originally 2.5 times, and stretching and 30000 conductivities of bending are substantially unchanged repeatedly.It is it is thus shown that provided herein
Flexographic cathode layer 5 resistance change within the specific limits with the increase of elongation it is smaller.
Flexible el device provided by the embodiments of the present application, flexographic cathode layer 5 includes fexible film, flexible
Film sets graphical slot, is provided with carbon material in graphical slot, carbon material can be formed in graphical slot and is made of carbon material
Carbon line 51.The flexographic cathode layer 5 containing carbon material that the application provides makes full use of the satisfactory electrical conductivity of carbon material
And its characteristic that self is migrated in macromolecule, flexographic cathode layer 5 is made to meet the conduction of flexible el device
It is required that.Meanwhile the carbon line being made of carbon material has good resistance to deflection, fatigue durability and toughness, and its conductivity is with it
The increase variation of elongation is smaller.In this way, the flexographic cathode layer 5 that carbon material is combined to form with fexible film, not only full
The flexible characteristic requirement of foot flexible el device, also with good resistance to deflection, fatigue durability and toughness, and it is conductive
Rate is smaller with the increase variation of its elongation, can ensure that flexible el device can effectively be stablized during dough deformation
Its electrical conductivity, avoid because the variation of 5 electrical conductivity of flexographic cathode layer and that flexible display apparatus is caused to show is uneven.
Fig. 6 is the flow chart of the preparation method of flexible el device provided by the embodiments of the present application, referring to attached drawing 6,
The preparation method of flexible el device provided by the embodiments of the present application, specifically includes following steps：
S101：Hole transmission layer, electroluminescence layer and electron transfer layer are sequentially prepared on flexible anode layer.
Specifically, flexible anode layer choosing prepares flexible anode layer with flexible anode layer finished product or by the method for spin coating,
Hole transmission layer, electroluminescence layer and electron transfer layer are sequentially formed on flexible anode layer.Flexible anode layer, hole transmission layer,
The selection of material of electroluminescence layer and electron transfer layer is no longer gone to live in the household of one's in-laws on getting married herein referring to the embodiment of above-mentioned flexible el device
It states.Formation hole transmission layer, electroluminescence layer and electron transfer layer can be selected all suitable for solution or intermetallic composite coating prepares coating
Mode, concretely spin coating, inkjet printing, silk-screen printing etc. one or more of combinations.
S102：The fexible film containing graphical slot is prepared on the electron transport layer.
Specifically, preparing the fexible film containing graphical slot on the electron transport layer, inkjet printing or photoetching can be selected
Form be processed making, that is, select and the flexible thin-film material that is made by inkjet printing or optical graving containing graphical
The fexible film of slot.
Transparent flexible film made of the materials such as PDMS, PET, PI may be selected in the material of fexible film.Specific manufacturing process
It is illustrated by taking tetraethylene glycol fexible film as an example, mixes the tetraethylene glycol solution containing PCL and the tetraethylene glycol containing Pluronic is molten
Liquid obtains tetraethylene glycol mixed solution；Then the tetraethylene glycol is printed using the method for inkjet printing on the electron transport layer
Mixed solution, it is dry, form the fexible film containing graphical slot.The mass concentration of usual PCL tetraethylene glycol solution is 8-10%,
The mass concentration of Pluronic tetraethylene glycol solution is 3-7%, and PCL tetraethylene glycols solution is with Pluronic tetraethylene glycols by weight 1:1
Mixing.
Specifically, it is 5% to take PCL tetraethylene glycols solution that mass concentration fraction is 10% and mass concentration fraction
Pluronic tetraethylene glycol solution, by 1:1 weight fraction obtains tetraethylene glycol mixed solution than mixing；Using the method for inkjet printing
The tetraethylene glycol mixed solution is printed on the electron transport layer, it is dry, form the fexible film containing graphical slot.So
The surface of the fexible film of formation has abundant hole, that is, fixation carbon nano tube line is contributed to help to improve again graphically
The electric conductivity of carbon nano tube flexible layer, ensures the safety in utilization of graphing carbon nanotube flexible layer, and then flexibility is effectively ensured
The safety in utilization of electroluminescent device.
S103：The fexible film is immersed into carbon material solution, dry, the carbon material in the carbon material solution is filled in
In the graphical slot of the fexible film, the carbon material forms flexographic cathode layer with the fexible film.
Specifically：The carbon material that the application proposes refers to the powder carbon materials such as carbon nanotubes, graphene, graphite.By carbon
Material is scattered in deionized water, more than ultrasonic disperse 12h, forms carbon material solution, the fexible film that step S102 is formed
Mask immerses carbon material solution, and the graphical slot of fexible film is filled by carbon nano-tube solution, after drying, carbon material solution
Carbon line is formed in the graphical slot of fexible film, such carbon line forms flexographic cathode layer with fexible film.
More specifically, in the application specific embodiment, the preferred carbon nano-tube solution of carbon material solution.Specifically, carbon
Nanotube is scattered in deionized water and forms carbon nano-tube solution, immerses carbon nanometer after the fexible film mask that step S102 is formed
In pipe solution, the graphical slot of fexible film is filled by carbon nano-tube solution.Wherein, the preferred single of carbon nano-tube solution
Pipe solution.
For further optimisation technique scheme, in the preparation method for the flexible el device that the application provides, the step
It further includes before rapid S103, immerses the fexible film of mask in polyelectrolyte solution before carbon material solution is immersed, immerse and complete
Afterwards, rinse, is dry.Specifically, choosing polyelectrolyte, polyelectrolyte is dissolved in deionized water, forms polyelectrolyte solution, it will
The fexible film of mask is immersed in the polyelectrolyte solution, and after the completion of immersion, polyelectrolyte solution was covered in rinsing, dry leaching
Fexible film.Polyacrylic acid, polymethylacrylic acid, polystyrolsulfon acid or poly dimethyl allyl chlorine can be selected in polyelectrolyte
Change ammonium.
More specifically, in the preparation method for the flexible el device that the application provides, choosing mass fraction is
The polydimethyl diallyl ammonium chloride of 200000-300000 or so is distributed in deionized water, forms two allyl of poly dimethyl
The polydimethyl diallyl ammonium chloride solution of ammonium chloride solution, preferably 0.5% mass concentration soaks the fexible film of mask
Enter polydimethyl diallyl ammonium chloride solution, after the completion of immersion, the poly dimethyl allyl chlorine was covered in rinsing, dry leaching
Change the fexible film of ammonium salt solution.Polydimethyl diallyl ammonium chloride is filled out in the surface hole defect for overlaying on fexible film, will be increased greatly
Add the electric conductivity of fexible film 52, and then help to improve the electron transfer rate of patterned cathode layer.
Single-walled carbon nanotube is scattered in deionized water and forms the single-walled carbon nanotube solution that concentration is 0.1-0.2mg/L,
NaOH solution is added in the single-walled carbon nanotube solution, ultrasonic disperse for 24 hours, makes to be uniformly mixed, the NaOH solution and institute
The weight ratio for stating single-walled carbon nanotube solution is 10:1；Surface leaching is covered to the flexible thin of polydimethyl diallyl ammonium chloride solution
The single-walled carbon nanotube solution of the mixing NaOH solution is immersed after film mask.Leaching is dry after the completion of covering, and single-walled carbon nanotube is molten
Liquid forms carbon nano tube line, polydimethyl diallyl ammonium chloride and single in the graphical slot of the fexible film
Pipe collectively promotes the electron transfer rate for improving patterned cathode layer.Wherein, NaOH solution helps to improve single-walled carbon nanotube
Dispersiveness.
Further, the formation hole transmission layer in step S101, specifically, mixing the tetraethylene glycol solution containing PCL and containing
There is the tetraethylene glycol solution of Pluronic, obtain tetraethylene glycol mixed solution；By PEDOT：PSS is scattered in deionized water, is formed
PEDOT：PSS solution；The tetraethylene glycol mixed solution is coated on flexible anode layer, after dry, is dipped in described
PEDOT：It is dry in PSS solution, form hole transmission layer on the flexible anode layer.More specifically, by 1：1 weight ratio is mixed
The tetraethylene glycol solution of 10%PCL and the tetraethylene glycol solution of 5%Pluronic are closed, obtains tetraethylene glycol mixed solution；By PEDOT：PSS
It is dissolved in 5% weight fraction in deionized water, forms PEDOT：PSS solution；The tetraethylene glycol is immersed on flexible anode layer
Mixed solution after dry, soaked and is overlying on the PEDOT：It is dry in PSS solution, form hole on the flexible anode layer
Transport layer, i.e. PEDOT：PSS hole transmission layers.Hole transmission layer PEDOT prepared by the method：PSS can overlay on tetraethylene glycol solution
In the hole formed after drying, the hole and PEDOT formed after the drying of tetraethylene glycol solution is taken full advantage of：PSS is combined excellent
Performance improves the cavity transmission ability of hole transmission layer.
Further, the tetraethylene glycol mixed solution is immersed on flexible anode layer, after dry, is dipped in PEDOT：
It is first dipped in before PSS solution in polyelectrolyte solution.Specifically, the tetraethylene glycol film formed after drying is first immersed into poly- diformazan
Base diallyl ammonium chloride solution equally after the completion of polydimethyl diallyl ammonium chloride solution is immersed, is rinsed and done
It is dry.Preferably, choose mass fraction and be distributed to deionization for the polydimethyl diallyl ammonium chloride of 200000-300000 or so
In water, the polydimethyl diallyl ammonium chloride solution of 0.5% mass concentration is formed.Poly dimethyl allyl chlorination was covered in leaching
The PEDOT of ammonium salt solution：PSS hole transmission layers increase the transmittability to hole, and poly dimethyl allyl chlorine was covered in leaching
Change the PEDOT of ammonium salt solution：For PSS hole transmission layers after flexible el device is stretched and bent repeatedly, electrical conductivity is basic
It is unchanged.
Based on flexible el device provided by the embodiments of the present application, the embodiment of the present application additionally provides a kind of flexible aobvious
Showing device, the flexible display apparatus include flexible el device or the above-mentioned flexible el that above-described embodiment provides
Flexible el device prepared by the preparation method of device.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples, related part is referring to side
The part explanation of method embodiment.Those skilled in the art will easily think after the application of specification and practice here is considered
To other embodiments of the application.This application is intended to cover any variations, uses, or adaptations of the application, these
Variations, uses, or adaptations follow the general principle of the application and do not apply in the art including the application
Common knowledge or conventional techniques.Description and embodiments are considered only as illustratively, the true scope and essence of the application
God is pointed out by following claim.
It should be appreciated that the precision architecture that the application is not limited to be described above and be shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by appended claim.
Claims (10)
- A kind of 1. flexible el device, including flexographic cathode layer, which is characterized in that the flexographic cathode Layer includes fexible film, and the fexible film is equipped with graphical slot, carbon material is provided in the graphical slot.
- 2. flexible el device according to claim 1, which is characterized in that the carbon material is carbon nanotubes.
- 3. flexible el device according to claim 1, which is characterized in that the flexographic cathode layer also wraps Include polyelectrolyte.
- 4. flexible el device according to claim 1, which is characterized in that the flexible el device is soft Property QLED or flexibility OLED.
- 5. a kind of preparation method of flexible el device, which is characterized in that the preparation method comprises the following steps：Hole transmission layer, electroluminescence layer and electron transfer layer are sequentially prepared on flexible anode layer；The fexible film containing graphical slot is prepared on the electron transport layer；The fexible film is immersed into carbon material solution, dry, the carbon material in the carbon material solution is filled in the flexibility In the graphical slot of film, the carbon material forms flexographic cathode layer with the fexible film.
- 6. the preparation method of flexible el device according to claim 5, which is characterized in that described in the electronics The fexible film containing graphical slot is prepared in transport layer, including：The tetraethylene glycol solution containing PCL and the tetraethylene glycol solution containing Pluronic are mixed, obtains tetraethylene glycol mixed solution；The tetraethylene glycol mixed solution is printed using the method for inkjet printing on the electron transport layer, dry, formation contains The fexible film of graphical slot.
- 7. the preparation method of flexible el device according to claim 5, which is characterized in that by the fexible film It immerses before carbon nano-tube solution the method, the method further includes：The fexible film is immersed into polyelectrolyte solution, the fexible film of the polyelectrolyte solution was covered in rinsing, dry leaching.
- 8. the preparation method of flexible el device according to claim 5, which is characterized in that by the fexible film Carbon material solution is immersed, is specially：Carbon nanotubes is scattered in deionized water and forms carbon nano-tube solution；The fexible film is immersed into the carbon nano-tube solution.
- 9. the preparation method of flexible el device according to claim 5, which is characterized in that described in flexible anode Layer is sequentially prepared in hole transmission layer, electroluminescence layer and electron transfer layer, described to prepare hole transmission layer in flexible anode layer Including：The tetraethylene glycol solution containing PCL and the tetraethylene glycol solution containing Pluronic are mixed, obtains tetraethylene glycol mixed solution；By PEDOT：PSS is scattered in deionized water, forms PEDOT：PSS solution；The tetraethylene glycol mixed solution is coated on the flexible anode layer, after dry, is dipped in the PEDOT：PSS is molten It is dry in liquid.
- 10. a kind of flexible display apparatus, which is characterized in that the flexible display apparatus includes claim 1-4 any one institute The flexible el device stated；Or,The flexible display apparatus includes flexible el prepared by the preparation method in claim 5-9 described in any one Device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113299840A (en) * | 2020-02-24 | 2021-08-24 | 延世大学校产学协力团 | Organic electroluminescent device using scalable light emitting material and method of fabricating the same |
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