CN111554833A - Preparation method of flexible transparent electroluminescent film, display and preparation method of display - Google Patents
Preparation method of flexible transparent electroluminescent film, display and preparation method of display Download PDFInfo
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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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
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- H—ELECTRICITY
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- 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
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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 provides a preparation method of a flexible transparent electroluminescent film, which comprises the following steps: s1, preparing electroluminescent material ink; s2, preparing a viscoelastic substrate; s3, ink-jet printing a flexible transparent electroluminescent film; s4, embedding the high-precision electroluminescent structure into a flexible transparent film; s5, optimizing the electroluminescent performance of the flexible electroluminescent film; and S6, preparing the flexible transparent electroluminescent film display. The flexible transparent electroluminescent film is printed by ink-jet printing based on the viscoelastic substrate, and the method has important research significance and application value for preparing flexible transparent electroluminescent film displays.
Description
Technical Field
The invention relates to the field of printing materials, in particular to a preparation method of a flexible transparent electroluminescent film based on viscoelastic substrate ink-jet printing.
Background
In recent years, inkjet printing has received much attention in the field of functional material patterning applications. Compared with other functional material patterning technologies, the ink-jet printing technology is used for directly depositing the functional material on the substrate, and processes such as masking, exposure etching and the like are not needed, so that the cost is saved, and the pollution is reduced. Meanwhile, the method also has the advantages of flexibility, rapidness, large-area preparation, strong environmental adaptability, adaptability to different base materials and the like. With the continuous and deep research and application of ink-jet printing functional materials in device manufacturing, the materials are applied to green plate making, single crystal thin films, transistors, tissues and organs, solar cells, anti-counterfeiting packages, RFID labels, sensors and the like.
In the process of realizing the patterning application of the functional material, the functional material (nano particles, macromolecules, liquid and the like) is dispersed or dissolved in a solvent to prepare ink, and ink drops are released to a substrate by utilizing instrument equipment to perform infiltration deposition, so that a patterned micro-nano structure is formed. The ink drop wetting behavior directly affects the accuracy and performance of ink jet printed structures. In the field of ink-jet printing of flexible transparent functional films, ink drops spread to generate a wider deposition structure, so that the transmittance of the films is poor, and meanwhile, the weaker bonding force between the deposition structure and the films can cause poorer flexibility, so that the application of ink-jet printing in the field of flexible transparent functional films is severely limited.
With the development of the ink-jet printing technology, many researches are devoted to improving the precision and the bonding force of an ink-jet printing structure on a film by utilizing the infiltration behavior of ink-jet ink drops so as to prepare a flexible transparent functional film. First, one method is to form a high-precision structure by preparing a physical or chemical threshold structure on a substrate in advance and spreading ink-jet ink droplets in a specific area. Such methods require complicated means such as photolithography for pre-patterning, and it is difficult to ensure the flexibility and transparency of the thin film. In addition, one method is to deposit functional material on the wetted edge of ink-jet ink drop to form high-precision structure by means of coffee ring effect so as to prepare flexible transparent functional film. The method needs good connection force of the functional material to realize flexibility, and the connection force on the film is difficult to promote. Also, one method is to suppress ink drop spreading by using a high contact angle of an ink-jet ink drop to achieve high-precision structure deposition. Such methods require substrates with low surface energy and are difficult to achieve in the preparation of ink jet drop fusion structures. Further, the group of Lewis subjects at Harvard university extrudes ink by inserting a needle into a viscoelastic substrate, and completely inhibits spreading of ink droplets by utilizing the wrapping effect of the substrate on the ink droplets. The Songling subject group of the chemical research institute of the Chinese academy of sciences prints the low-viscosity conductive material ink by ink-jet printing, and fuses in the viscoelastic base material to form a high-precision circuit, and the structure of the embedded film prevents the cracking and peeling under the bending. Therefore, the ink-jet printing realizes that the flexible transparent film is embedded in a high-precision structure, and a patterned flexible transparent functional film can be formed.
As human-machine interface interaction and fusion play more and more important roles in improving human cognition and behavior ability, the application requirements of the flexible transparent film display in the fields of wearable electronics, life medical treatment, smart cities and the like are continuously increased, and researchers at home and abroad develop a great deal of research work around the preparation of the flexible transparent film display. High resolution OLED devices with a resolution of 640ppi or even 1250ppi were prepared by continuous deposition lithography by Fujifilm corporation of japan, but the process flow of OLED multilayer structures has limited the development of flexible transparent thin film displays. Gu and the like selectively crosslink the polymer film for patterning to realize full-color display of the organic polymer, but the polymer film has a complex structure and is difficult to ensure the flexibility and the transparency. In recent years, a common thin film electroluminescent system is formed by doping ZnS: X in PDMS, PVDF or Ecoflex according to an 'alternating current thin film electroluminescent principle'. And (3) directly writing and printing the patterned silver nanowires by Cai and the like and combining the PDMS/fluorescent powder film to prepare the stretchable electroluminescent display device. Ferri et al screen printed 200um thick flexible electroluminescent displays on textiles using dielectrics and ZnS: Cu, Cl phosphor. Shin et al spin-coat a luminescent layer on a flexible electrode to prepare an ac electroluminescent thin film display. Chen et al ink-jet printed metallic supramolecular polymers on transparent conductive films to form patterned electrochromic films. Ho et al control the concentration of electrochromic materials in the gel electrolyte enables multicolor display inks and enables thin film displays to be prepared by direct writing. However, the complexity, precision, patterning and the like of the electroluminescent material deposition structure in these studies have difficulty in meeting the requirements for preparing flexible transparent electroluminescent thin film displays.
Disclosure of Invention
The invention aims to provide a preparation method of a flexible transparent electroluminescent film based on viscoelastic substrate ink-jet printing, which is characterized in that the soaking process and mechanism of ink-jet ink drops in a viscoelastic substrate are utilized, and the electroluminescent material in the ink-jet ink drops is deposited into a high-precision structure in the viscoelastic substrate by utilizing a controllable soaking behavior. Further, the viscoelastic substrate is cured to realize the flexible transparent film embedded with the high-precision electroluminescent structure. The patterning of the high-precision electroluminescent structure in the flexible transparent film is formed by ink-jet printing, and comprises the construction of RGB three primary colors, the combination of point and line surfaces of a luminous unit, the regulation and control of color gradation levels and the like. When the patterned film is combined with a flexible transparent electrode, an electroluminescent thin film display with good flexibility and transparency can be prepared.
The invention provides a preparation method of a flexible transparent electroluminescent film, which comprises the following steps:
s1, preparing electroluminescent material ink: aiming at different electroluminescent effects, selecting a proper electroluminescent material according to the requirements of an alternating current thin film electroluminescent principle, forming an electroluminescent material solution with uniform stability and ink-jet printing fluency by adopting a grinding or dispersant introducing method, and preparing and forming electroluminescent material ink;
s2, preparing a viscoelastic substrate: selecting prepolymers of different types, uniformly adding an initiator to form a mixture, spin-coating or extruding the mixture to prepare a liquid prepolymer viscoelastic substrate, and curing to obtain a flexible transparent film;
s3, ink-jet printing of the flexible transparent electroluminescent film: injecting the electroluminescent material ink prepared in the step S1 into an ink box of an ink-jet printer, optimizing ink-jet printing parameters by adopting a fine spray head and adjusting the diameter of an ink-jet printing head, the size of ink-jet voltage, the frequency of the ink-jet voltage and the pulse width of the ink-jet voltage, and performing ink-jet printing on the patterns set by a computer on the viscoelastic substrate obtained in the step S2 to complete the process of ink-jet printing of the flexible transparent electroluminescent film;
s4, embedding the high-precision electroluminescent structure into the flexible transparent film to obtain the flexible electroluminescent film: utilizing the ink-jet printing of the step S3 to enable dynamic infiltration between the electroluminescent material ink drops and the viscoelastic substrate, controlling interface infiltration behavior by controlling deposition motion tracks of the functional materials in the ink drops on the substrate interface, depositing the functional materials in the ink drops to form a high-precision structure, and embedding the high-precision electroluminescent structure into the flexible transparent film after the viscoelastic substrate is cured to obtain the flexible electroluminescent film;
s5, detecting the performance of the flexible electroluminescent film prepared in the step S4, and if the performance of the flexible electroluminescent film does not meet the requirements, optimizing the electroluminescent performance of the flexible electroluminescent film: researching the electroluminescent performance of the flexible transparent electroluminescent film for ink-jet printing, optimizing the ink-jet printing parameters by regulating and controlling the components and the proportion of luminescent functional materials and substrates in the ink according to the material performance requirements in the electroluminescent process, and repeating the steps S1-S4 to realize that the flexible electroluminescent film has the electroluminescent performance meeting the requirements under the condition of ensuring the flexibility and the transparency of the film.
Preferably, the mass fraction ratio of the electroluminescent material, the dispersant and the solvent of the ink-jet printing ink in the step S1 is: 5-25% of electroluminescent material of ink-jet printing ink, 1-5% of dispersant and 70-90% of solvent.
Preferably, the dispersion of the dispersant has a solids content of 6-18%.
Preferably, the diameter of the inkjet print head is adjusted in a range of 10 to 20 μm, the magnitude of the inkjet voltage is adjusted in a range of 20 to 40V, the frequency of the inkjet voltage is adjusted in a range of 1 to 10KHZ, and the pulse width of the inkjet voltage is adjusted in a range of 5 to 10 μ S in step S3.
Preferably, in step S4, the deposition motion trajectory of the functional material in the ink droplet at the substrate interface is controlled by the capillary flow and the force of the marangoni flow in the fluid.
Preferably, the prepolymer in step S2 is a photopolymerizable prepolymer or a thermally polymerizable prepolymer, and the viscoelastic substrate is a prepolymer to which 5 to 10% of an initiator is added.
Preferably, the present invention also provides a flexible transparent electroluminescent film display comprising the above flexible electroluminescent film.
Preferably, the method for preparing the flexible transparent electroluminescent thin film display comprises the following steps: based on the relation between the patterning of the high-precision electroluminescent structure in the flexible transparent film by ink-jet printing and the luminous display effect, the flexible transparent electroluminescent film display with good flexibility and transparency is prepared by designing according to different application scene requirements and combining the patterned film with the flexible transparent electrode.
Preferably, the relationship between the patterning of the ink-jet printing high-precision electroluminescent structure in the flexible transparent film and the luminous display effect comprises the construction of RGB three primary colors, the combination of the dot and line surfaces of the luminous unit and the regulation and control of the color gradation level.
Compared with the prior art, the invention has the following technical effects:
the invention can prepare the electroluminescent material ink with uniform stability and ink-jet printing fluency; preparing prepolymer with proper rheological property, spin-coating or extruding viscoelastic substrate, and then initiating curing to obtain the flexible transparent film. The size of the high-precision electroluminescent structure for ink-jet printing reaches 1 micron or below; the high-precision electroluminescent structure is embedded in the flexible transparent film. The electroluminescent performance of the ink-jet printing electroluminescent structure film meets the application requirement of luminescent display; stable electroluminescent performance can be kept after multiple times of bending and stretching.
The flexible transparent electroluminescent film is printed by ink-jet printing based on the viscoelastic substrate, and the method has important research significance and application value for preparing flexible transparent electroluminescent film displays.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic workflow diagram of an embodiment of the present invention; and
FIG. 3 is a schematic illustration of the aggregate structure of an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The invention provides a preparation method of a flexible transparent electroluminescent film, which comprises the following steps:
s1, preparing electroluminescent material ink: aiming at different electroluminescent effects, selecting a proper electroluminescent material according to the requirements of an alternating current thin film electroluminescent principle, forming an electroluminescent material solution with uniform stability and ink-jet printing fluency by adopting a grinding or dispersant introducing method, and preparing and forming electroluminescent material ink; in specific application, ZnS can be used for doping a dispersion material to prepare the luminescent material ink.
S2, preparing a viscoelastic substrate: selecting different types of prepolymers, uniformly adding an initiator to form a mixture, spin-coating or extruding the mixture to prepare a liquid prepolymer viscoelastic substrate, and curing to obtain the flexible transparent film.
S3, ink-jet printing of the flexible transparent electroluminescent film: injecting the electroluminescent material ink prepared in the step S1 into an ink box of an ink-jet printer, optimizing ink-jet printing parameters by adjusting the diameter of an ink-jet printing head, the size of ink-jet voltage and the frequency of the ink-jet voltage by adopting a fine nozzle, and performing ink-jet printing on a pattern set by a computer on the viscoelastic substrate obtained in the step S2 to complete the process of ink-jet printing of the flexible transparent electroluminescent film, wherein the diameter of the ink-jet printing head in the step S3 is adjusted within the range of 10-20 micrometers, the size of the ink-jet voltage is adjusted within the range of 20-40V, and the frequency of the ink-jet voltage is adjusted within the.
S4, embedding the high-precision electroluminescent structure into the flexible transparent film to obtain the flexible electroluminescent film: the ink-jet printing of the step S3 is utilized to enable the dynamic infiltration action to be generated between the electroluminescent material ink drop and the viscoelastic substrate, the interface infiltration behavior is controlled by controlling the deposition motion track of the functional material in the ink drop on the substrate interface, the functional material in the ink drop is deposited to form a high-precision structure, and the high-precision electroluminescent structure is embedded into the flexible transparent film after the viscoelastic substrate is cured; in practical application, the deposition motion trail of the functional material in the ink drop on the substrate interface is controlled by utilizing the acting forces of capillary flow, Marangoni flow and the like in the fluid, specifically, the functional material aggregate is realized under the action of solvent volatilization through the wetting and extrusion action of a viscoelastic substrate, the electroluminescent material is effectively embedded on the film by the aggregate with high precision, and the electroluminescent performance of the film is directly influenced by the controllable aggregate structure. A schematic of the aggregate structure is shown in fig. 3.
The preparation process of the specific example is shown in fig. 2, where 1 is a viscoelastic substrate, 2 is an electroluminescent material ink dropped on the viscoelastic substrate, 3 is a high-precision electroluminescent material prepared after step S3, and 4 is a flexible electroluminescent film obtained by embedding a high-precision electroluminescent structure in a flexible transparent film in step S4.
Fig. 3 is a schematic diagram of the deposition movement track of the functional material in the ink drop on the substrate interface and the formed aggregate structure, wherein the process that the functional material in the ink drop permeates into the luminescent film from the surface on the substrate interface is shown, and the preparation of the electroluminescent material film is completed.
S5, detecting the performance of the flexible electroluminescent film prepared in the step S4, and if the performance of the flexible electroluminescent film does not meet the requirements, optimizing the electroluminescent performance of the flexible electroluminescent film: the electroluminescent performance of the flexible transparent electroluminescent film for ink-jet printing is researched, the ink-jet printing parameters are optimized by regulating and controlling the luminescent functional material in the ink and the components and the proportion of the substrate according to the material performance requirement in the electroluminescent process, and in practical application, elements with influences on the luminescent effect can be doped in the substrate, so that the electrolyte effect is properly increased. Under the condition of ensuring the flexibility and the transparency of the film, the flexible electroluminescent film has good electroluminescent performance.
When the flexible transparent electroluminescent thin film display needs to be prepared, the following steps can be adopted for preparation: based on the relation between the patterning of the high-precision electroluminescent structure in the flexible transparent film by ink-jet printing and the luminous display effect, the flexible transparent electroluminescent film display with good flexibility and transparency is prepared by designing according to different application scene requirements and combining the patterned film with the flexible transparent electrode. The specific scenes and the specific design method are applied to the application scenes of subways or high-speed railway windows and the like in the field of public transport, and some advertisements, tourism and safety information display are designed. In the building field, colleges and universities or office buildings are designed with propaganda, notification and cultural knowledge information display.
Preferably, the mass fraction ratio of the electroluminescent material, the dispersant and the solvent of the ink-jet printing ink in the step S1 is: 5-25% of electroluminescent material of ink-jet printing ink, 1-5% of dispersant and 70-90% of solvent.
Preferably, the dispersion of the dispersant has a solids content of 6-18%.
Preferably, the relationship between the patterning of the inkjet-printed high-precision electroluminescent structure in the flexible transparent film and the luminous display effect in step S6 includes the construction of RGB three primary colors, the combination of dot and line surfaces of the luminous unit, and the adjustment and control of color gradation levels.
Preferably, the prepolymer in step S2 is a photopolymerizable prepolymer or a thermally polymerizable prepolymer. The viscoelastic substrate is formed by adding 5-10% of initiator into prepolymer.
Detailed description of the preferred embodiment 1
In this embodiment, some advertisements, traveling and safety information display need to be designed in the application scenes such as subway or high-speed rail windows in the field of public transportation.
In this embodiment, it is first necessary to prepare a flexible electroluminescent film comprising the steps of:
s1, preparing electroluminescent material ink: aiming at different electroluminescent effects, a proper electroluminescent material is selected according to the requirements of the alternating current thin film electroluminescent principle, and an electroluminescent material solution with uniform stability and ink-jet printing fluency is formed by adopting a grinding or dispersant introducing method to prepare and form the electroluminescent material ink.
The mass fraction ratio of the electroluminescent material, the dispersant and the solvent of the ink-jet printing ink in the step S1 is as follows: 15% of electroluminescent material of the ink for ink-jet printing, 5% of dispersant and 80% of solvent. The dispersion of the dispersant had a solids content of 10%.
S2, preparing a viscoelastic substrate: selecting different types of prepolymers, uniformly adding an initiator to form a mixture, spin-coating or extruding the mixture to prepare a liquid prepolymer viscoelastic substrate, and curing to obtain the flexible transparent film.
S3, ink-jet printing of the flexible transparent electroluminescent film: injecting the electroluminescent material ink prepared in the step S1 into an ink box of an ink-jet printer, optimizing ink-jet printing parameters by adjusting the diameter of an ink-jet printing head, the size of ink-jet voltage and the frequency of the ink-jet voltage by adopting a fine nozzle, and performing ink-jet printing on a pattern set by a computer on the viscoelastic substrate obtained in the step S2 to finish the process of ink-jet printing of the flexible transparent electroluminescent film, wherein in the embodiment, the diameter of the ink-jet printing head is 10 micrometers, the size of the ink-jet voltage is 20V, the frequency of the ink-jet voltage is 5KHZ, and the pulse width of the ink-jet voltage.
S4, embedding the high-precision electroluminescent structure into the flexible transparent film to obtain the flexible electroluminescent film: the ink-jet printing is utilized to enable dynamic infiltration between electroluminescent material ink drops and a viscoelastic substrate, the interface infiltration behavior is controlled by controlling the deposition motion track of functional materials in the ink drops on the substrate interface, a high-precision structure is formed by deposition, and the flexible electroluminescent film is obtained by embedding the high-precision electroluminescent structure into the flexible transparent film after the viscoelastic substrate is cured.
After the preparation is finished, an optical microscope can be used for inspecting the ink-jet printing flexible transparent electroluminescent film system. And (3) characterizing the structure of the high-precision electroluminescent material by using a scanning electron microscope. The material composition and the crystal structure of the prepared structure are researched by an energy spectrometer and an X-ray polycrystalline diffractometer. The electroluminescent performance of the prepared film is tested by using a photometric tester and a high-precision numerical control tensile device.
If the performance of the prepared flexible electroluminescent thin film does not meet the requirements, the ink-jet printing parameters can be optimized by regulating and controlling the components and the proportion of the luminescent functional material and the substrate in the ink, so that the electroluminescent performance of the flexible electroluminescent thin film is optimized.
Finally, based on the relation between the patterning of the high-precision electroluminescent structure in the flexible transparent film by ink-jet printing and the luminous display effect, after the patterned film is combined with the flexible transparent electrode, the graphic information is scanned and converted into color electric signals, the ink-jet printing equipment is controlled according to the electric signals through color separation of colors, the formed ink-jet printing red, green and blue luminous unit is combined with the comprehensive flexible transparent film, the flexible transparent electroluminescent display is realized, and the specific information display can be realized quickly and efficiently.
Specific example 2
In this embodiment, it is necessary to design some propaganda, notification and cultural knowledge information display in the building field, colleges and universities or office buildings.
In this embodiment, the flexible electroluminescent thin film is prepared as in embodiment 1, after the flexible electroluminescent thin film is prepared, the graphic information is scanned and converted into color electrical signals, the flexible transparent thin film of the field effect transistor with the array is controlled according to the electrical signals through color separation of colors, and the flexible transparent electroluminescent display is realized by combining the uniform inkjet printing red, green and blue light emitting units, so that the specific information display can be realized quickly and efficiently, and meanwhile, the information display content can be changed by directly changing the electrical signal control transistor according to the requirements.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (9)
1. A preparation method of a flexible transparent electroluminescent film is characterized by comprising the following steps: which comprises the following steps:
s1, preparing electroluminescent material ink: aiming at different electroluminescent effects, selecting a proper electroluminescent material according to the requirements of an alternating current thin film electroluminescent principle, forming an electroluminescent material solution with uniform stability and ink-jet printing fluency by adopting a grinding or dispersant introducing method, and preparing and forming electroluminescent material ink;
s2, preparing a viscoelastic substrate: selecting prepolymers of different types, uniformly adding an initiator to form a mixture, spin-coating or extruding the mixture to prepare a liquid prepolymer viscoelastic substrate, and curing to obtain a flexible transparent film;
s3, ink-jet printing of the flexible transparent electroluminescent film: injecting the electroluminescent material ink prepared in the step S1 into an ink box of an ink-jet printer, optimizing ink-jet printing parameters by adopting a fine spray head and adjusting the diameter of an ink-jet printing head, the size of ink-jet voltage, the frequency of the ink-jet voltage and the pulse width of the ink-jet voltage, and performing ink-jet printing on the patterns set by a computer on the viscoelastic substrate obtained in the step S2 to complete the process of ink-jet printing of the flexible transparent electroluminescent film;
s4, embedding the high-precision electroluminescent structure into the flexible transparent film to obtain the flexible electroluminescent film: utilizing the ink-jet printing of the step S3 to enable dynamic infiltration between the electroluminescent material ink drops and the viscoelastic substrate, controlling interface infiltration behavior by controlling deposition motion tracks of the functional materials in the ink drops on the substrate interface, depositing the functional materials in the ink drops to form a high-precision structure, and embedding the high-precision electroluminescent structure into the flexible transparent film after the viscoelastic substrate is cured to obtain the flexible electroluminescent film;
s5, detecting the performance of the flexible electroluminescent film prepared in the step S4, and if the performance of the flexible electroluminescent film does not meet the requirements, optimizing the electroluminescent performance of the flexible electroluminescent film: researching the electroluminescent performance of the flexible transparent electroluminescent film for ink-jet printing, optimizing the ink-jet printing parameters by regulating and controlling the components and the proportion of luminescent functional materials and substrates in the ink according to the material performance requirements in the electroluminescent process, and repeating the steps S1-S4 to realize that the flexible electroluminescent film has the electroluminescent performance meeting the requirements under the condition of ensuring the flexibility and the transparency of the film.
2. The method of claim 1, wherein the flexible transparent electroluminescent film comprises: the mass fraction ratio of the electroluminescent material, the dispersant and the solvent of the ink-jet printing ink in the step S1 is as follows: 5-25% of electroluminescent material of ink-jet printing ink, 1-5% of dispersant and 70-90% of solvent.
3. The method of claim 2, wherein the flexible transparent electroluminescent film is prepared by: the solid content of the dispersing system of the dispersing agent is 6-18%.
4. The method of claim 1, wherein the flexible transparent electroluminescent film comprises: in step S3, the diameter of the ink jet print head is adjusted within a range of 10-20 microns, the ink jet voltage is adjusted within a range of 20-40V, the ink jet voltage frequency is adjusted within a range of 1-10KHZ, and the ink jet voltage pulse width is adjusted within a range of 5-10 mus.
5. The method of claim 1, wherein the flexible transparent electroluminescent film comprises: in step S4, the deposition motion trajectory of the functional material in the ink droplet on the substrate interface is controlled by the capillary flow and the force of the marangoni flow in the fluid.
6. The method of claim 1, wherein the flexible transparent electroluminescent film comprises: the prepolymer in step S2 is a photopolymerizable prepolymer or a thermally polymerizable prepolymer, and the viscoelastic substrate is a prepolymer to which 5 to 10% of an initiator is added.
7. A flexible transparent electroluminescent thin film display characterized by: comprising the flexible electroluminescent film prepared according to claim 1.
8. The flexible transparent electroluminescent thin film display of claim 7, wherein: the preparation method comprises the following steps: based on the relation between the patterning of the high-precision electroluminescent structure in the flexible transparent film by ink-jet printing and the luminous display effect, the flexible transparent electroluminescent film display with good flexibility and transparency is prepared by designing according to different application scene requirements and combining the patterned film with the flexible transparent electrode.
9. The method of claim 8, wherein the method comprises the steps of: the relation between the patterning of the ink-jet printing high-precision electroluminescent structure in the flexible transparent film and the luminous display effect comprises the construction of RGB three primary colors, the combination of the point and the line of a luminous unit and the regulation and control of color gradation levels.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112002803A (en) * | 2020-08-27 | 2020-11-27 | 齐鲁工业大学 | Method for preparing functional material pattern by ink-jet printing construction template method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115577A (en) * | 2008-11-12 | 2010-05-27 | Canon Inc | Method for producing film pattern |
| KR101685069B1 (en) * | 2016-04-01 | 2016-12-09 | 금오공과대학교 산학협력단 | Manufacturing method of patterned flexible transparent electrode |
| US20180010039A1 (en) * | 2016-07-07 | 2018-01-11 | University Of Central Florida Research Foundation, Inc. | Methods of making highly stable perovskite- polymer composites and structures using same |
| CN108300455A (en) * | 2018-01-29 | 2018-07-20 | 福州大学 | A kind of colorful polymer composite film and preparation method thereof based on perovskite quantum dot |
| CN109080281A (en) * | 2018-08-10 | 2018-12-25 | 齐鲁工业大学 | The method for preparing flexible transparent conducting film based on the fine inkjet printing of wellability substrate |
| CN110105953A (en) * | 2019-05-24 | 2019-08-09 | 深圳扑浪创新科技有限公司 | A kind of inorganic perovskite quantum dot film of high stability and its preparation method and application |
-
2020
- 2020-06-02 CN CN202010491579.1A patent/CN111554833B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010115577A (en) * | 2008-11-12 | 2010-05-27 | Canon Inc | Method for producing film pattern |
| KR101685069B1 (en) * | 2016-04-01 | 2016-12-09 | 금오공과대학교 산학협력단 | Manufacturing method of patterned flexible transparent electrode |
| US20180010039A1 (en) * | 2016-07-07 | 2018-01-11 | University Of Central Florida Research Foundation, Inc. | Methods of making highly stable perovskite- polymer composites and structures using same |
| CN108300455A (en) * | 2018-01-29 | 2018-07-20 | 福州大学 | A kind of colorful polymer composite film and preparation method thereof based on perovskite quantum dot |
| CN109080281A (en) * | 2018-08-10 | 2018-12-25 | 齐鲁工业大学 | The method for preparing flexible transparent conducting film based on the fine inkjet printing of wellability substrate |
| CN110105953A (en) * | 2019-05-24 | 2019-08-09 | 深圳扑浪创新科技有限公司 | A kind of inorganic perovskite quantum dot film of high stability and its preparation method and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112002803A (en) * | 2020-08-27 | 2020-11-27 | 齐鲁工业大学 | Method for preparing functional material pattern by ink-jet printing construction template method |
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