CN116512789A - Method and product for adjusting film thickness of ink-jet printing target and application thereof - Google Patents

Method and product for adjusting film thickness of ink-jet printing target and application thereof Download PDF

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Publication number
CN116512789A
CN116512789A CN202310455631.1A CN202310455631A CN116512789A CN 116512789 A CN116512789 A CN 116512789A CN 202310455631 A CN202310455631 A CN 202310455631A CN 116512789 A CN116512789 A CN 116512789A
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CN
China
Prior art keywords
film thickness
printing
area
adjusting
ink
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Pending
Application number
CN202310455631.1A
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Chinese (zh)
Inventor
张鑫
杨喜业
董升
黄飞
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Guangzhou Guangda Innovation Technology Co ltd
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Guangzhou Guangda Innovation Technology Co ltd
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Priority to CN202310455631.1A priority Critical patent/CN116512789A/en
Publication of CN116512789A publication Critical patent/CN116512789A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0064—Digital printing on surfaces other than ordinary paper on plastics, horn, rubber, or other organic polymers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/50—Photovoltaic [PV] devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/60—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation in which radiation controls flow of current through the devices, e.g. photoresistors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses a method for adjusting the film thickness of an ink-jet printing target, which is characterized in that the area ratio of a printing area to a non-printing area on the total area to be printed is set in the ideal parameter range of continuous ink-jet printing equipment. Wherein the ideal parameter ranges are: in the continuous ink jet printing device, the voltage range is 100-650V; the frequency range is 4000-7500 HZ. According to the invention, the filling ratio in the printing area is regulated, the thickness of the printing film is reduced to the optimal film thickness of the device under the condition that the solution concentration is not reduced and the process parameters such as voltage, frequency and the like which are most suitable for stable ink jet of an ink jet printer are adopted, so that the high performance of the organic photoelectric device is realized, and meanwhile, the printer works under the optimal working parameters, so that the stable preparation process with small film thickness difference between the sheets can be obtained. The scheme includes, but is not limited to, application in: the fields of organic OPD and organic OSC can be used in all fields of processing using inkjet printing.

Description

Method and product for adjusting film thickness of ink-jet printing target and application thereof
Technical Field
The invention relates to the field of ink-jet printing, in particular to a method and a product for adjusting the film thickness of an ink-jet printing target and application thereof.
Background
With the advancement of material technology, solution processable organic photosensitive materials have been greatly developed in the fields of Organic Solar Cells (OSC), organic Photodetectors (OPD), and the like. Common solution processing modes of organic photosensitive materials are as follows: spin coating, spray coating, knife coating, ink jet printing, and the like. The ink-jet printing is used as a processing mode with extremely high material utilization rate and accurate and controllable printing position, and has very wide application prospect in the field of organic photoelectric device processing. For organic optoelectronic devices (OSC, OPD), there is a certain optimum film thickness range for each functional layer of the device, below or beyond which the actual film thickness will be greatly affected by the performance of the device. Thus in the specified area region (typically > 0.25mm 2 ) The proper thickness of each solution processing film (organic photosensitive material layer, interface layer, etc.) is obtained by ink-jet printing and film thickness regulation, which is the key for realizing high performance of the organic photoelectric device.
Inkjet printing devices generally have an optimal operating voltage, frequency range, optimal inkjet, and optimal ink concentration range within which the printer can stably and continuously jet ink to obtain a printed film layer with small sheet-to-sheet thickness variation. For organic photoelectric devices, the thickness of each functional layer is generally required to be thinner (such as OPD devices: the optimal thickness of the organic layer is about 2-400 nm, and the interface layer is less than 200 nm). Therefore, simply changing the printing parameters within the optimal printing parameters often makes it difficult to thin the printed film to the target thickness, resulting in poor performance of the organic device. The main reason may be affected by the optimal parameters for stable operation of the printing device and by the physicochemical properties of the solution itself (concentration, surface tension, boiling point, etc.).
Therefore, based on the above analysis, there is a need for a new method for adjusting the target film thickness of inkjet printing to overcome the above drawbacks.
Disclosure of Invention
The invention discloses a design method of a printing pattern, which realizes the regulation and control of the thickness of a printing film layer under the condition that the concentration of a solution is not reduced and the stable inkjet parameter of printing equipment is adopted by regulating the filling ratio (the ratio of printing area to non-printing area) in the whole printing area.
When the required film layer of the device is thinner (such as an OPD device, the optimal thickness of the organic layer is about 2-400 nm), ink drops can not be ejected, the ink jet is unstable and even plugs are easily caused by reducing the printing process adjustment of the ink jet voltage, the frequency and the like; by lowering the solution concentration, there is a possibility that ink droplets cannot be stably formed, and it is difficult to achieve thinning of the print film thickness. Therefore, the method realizes the regulation and control of the thickness of the printing film layer by adjusting the filling ratio in the printing area under the condition that the concentration of the solution is not reduced and the most suitable technological parameters such as voltage, frequency and the like for stabilizing the ink jet of the ink jet printer are adopted.
An object of the present invention is to provide a method of adjusting the film thickness of an inkjet printing target, which sets the area ratio of a printing area and a non-printing area over the total area to be printed within a desired parameter range of a continuous inkjet printing apparatus. A schematic diagram of the relevant printing effect is shown in fig. 1, wherein the hatched portion represents the printing location.
Wherein the ideal parameter ranges are:
in the continuous ink jet printing device, the voltage range is 100-650V; the frequency range is 4000-7500 HZ.
Further, the area ratio of the printing area to the non-printing area is 1:9-8:2.
Specifically, different filling ratios may be 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, or 8:2, and related schematic diagrams are shown in fig. 1. Wherein, the labels (a) - (h) represent schematic views with different filling ratios of 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3 or 8:2 respectively.
Further, the printing area is composed of array patterns composed of a plurality of repeated units, and finally, the array patterns are mutually fused through the fluidity of the ink and the hydrophilicity of the substrate to form the whole printing area film layer.
Further, the target film thickness is 100 to 500nm.
Further, the print zone is formed by one or more combinations of fill ratios.
Further, the print zone is formed by one or more patterns.
Further, the pattern is selected from one or more of a line shape, a circle shape, a rectangle shape, a square shape, a triangle shape, a diamond shape, a trapezoid shape, a parallelogram shape, and a pentagon shape.
Another object of the present invention is to disclose the film printed by the above method for adjusting the film thickness of an inkjet printing target.
Another object of the present invention is to disclose the application of the film printed by the method for adjusting the film thickness of the inkjet printing target in the photovoltaic field.
Further, the film printed by the method for adjusting the film thickness of the ink-jet printing target is applied to an active layer and an interface modification layer of an optoelectronic device.
The beneficial effects of the invention are as follows:
by adjusting the filling ratio in the printing area, the thickness of the printing film is reduced to the optimal film thickness of the device under the condition that the concentration of the solution is not reduced and the process parameters such as voltage, frequency and the like which are most suitable for stable ink jet of an ink jet printer are adopted, so that the high performance of the organic photoelectric device is realized, and meanwhile, the printer works under the optimal working parameters, so that a stable preparation process with small film thickness difference between sheets can be obtained.
The scheme includes, but is not limited to, application in: the fields of organic OPD and organic OSC can be used in all fields of processing using inkjet printing.
Drawings
Fig. 1 shows a schematic diagram of different filling ratios.
FIG. 2 shows schematic diagrams of different filling ratios of examples 1 to 4 and comparative examples 1 to 4.
Fig. 3 shows appearance diagrams of the samples obtained in examples 1 to 4 and comparative examples 1 to 4.
Fig. 4 shows several schematic diagrams of varying the array pattern trim fill ratio.
Detailed Description
The conception, specific structure, and technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects, and effects of the present invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
The printer used in the scheme has the printing voltage adjustable range of 50-700V, the frequency adjustable range of 100-7500 Hz, the optimal printing voltage range provided by manufacturers of 100-650V and the optimal working frequency of 4000-7000 Hz. The printing ink of this example was an organic OPD photosensitive solution at 1.5 x 1.5cm 2 The total area of the glass is 14mm by 10mm, and the target thickness is 240-300 nm.
The experimental steps of the examples and comparative examples of the present invention are:
first, the filling ratio was set to 10:0 (i.e., comparative examples 1 to 4), the inkjet printing voltage was set to 500V, the frequency was set to 7500Hz,
after printing and drying, performing film thickness test on the central area by using a step instrument, wherein the test result shows that the central thickness is 710nm and far exceeds the target film thickness; then keeping the filling ratio at 10:0 unchanged, simultaneously reducing the ink-jet voltage and frequency (reducing either one of the two can reduce the ink-jet quantity) to 350V and 6500Hz, and measuring the thickness after printing and drying, wherein the test result shows that the center thickness is 667nm and still far exceeds the target film thickness; continuously reducing the voltage and the frequency to 150V and 3500Hz respectively, and measuring the thickness of the film layer to be 500nm which is far higher than the target film thickness; the voltage is further reduced to 100V, meanwhile, the frequency is adjusted to 7500Hz, at the moment, the deformation amount of the piezoelectric ceramic of the printer nozzle is insufficient to stably extrude ink, so that the ink cannot be stably ejected, the ink is not continuously ejected in a printing area, and part of the area is not covered by the ink. The results of the comparative examples show that the simple adjustment of the printing parameters cannot realize the thinning of the film thickness to the optimal film thickness of the device, and the unstable condition of printing and ink-jet easily occurs.
Subsequently, film thickness reduction was performed by changing the filling ratio in the printing region (i.e., examples 1 to 4). When the voltage is 500V and the frequency is 7500Hz, the filling ratio is set to 7:3, the ink can be spread in the whole printing area due to the fluidity of the ink and the hydrophilicity of the substrate, and after printing is finished and drying, film thickness test is carried out, and the test result shows that the center thickness is 508nm; then the voltage is reduced to 350V, the filling ratio is adjusted to 6:4, and the thickness of the film layer is measured to be 420nm; continuously reducing the voltage to 250V/200V, setting the filling ratio to 5:5, and obtaining the film thickness of 270nm/250nm at the moment respectively, thereby realizing the obtaining of the target film thickness. As can be seen from examples 3 and 4 in fig. 3, the film coverage is complete in the whole printing area, and no defects occur.
The experimental parameters and results obtained are shown in table 1.
FIG. 2 shows schematic diagrams of different filling ratios of examples 1 to 4 and comparative examples 1 to 4.
TABLE 1 parameters and related Effect of the samples obtained in examples 1 to 4 and comparative examples 1 to 4
It is clear from table 1 that the simple adjustment of the printing parameters cannot achieve the thinning of the film thickness to the device optimum film thickness, but the achievement of the target film thickness is achieved by adjusting the filling ratio.
Fig. 3 shows appearance diagrams of the samples obtained in examples 1 to 4 and comparative examples 1 to 4. As can be seen from the appearance, the thicker the film layer, the darker the color; the voltage and the frequency are simply changed, the color of the film layer is darker, and when the voltage is reduced to a certain value, the ink cannot be stably sprayed, and an uncovered area appears on the film layer; after the filling ratio, the voltage and the frequency are changed, the color of the film layer is obviously lightened, the thickness is obviously reduced, and finally the target film thickness is obtained.
Fig. 4 shows several schematic diagrams of varying the array pattern trim fill ratio.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. A method for adjusting the film thickness of an ink-jet printing target is characterized in that the area ratio of a printing area to a non-printing area is adjusted by setting the total area to be printed in the ideal parameter range of continuous ink-jet printing equipment.
Wherein the ideal parameter ranges are:
in the continuous ink jet printing device, the voltage range is 100-650V; the frequency range is 4000-7500 HZ.
2. The method of adjusting a target film thickness for inkjet printing according to claim 1, wherein the area ratio of the printed area to the non-printed area is 1:9 to 8:2.
3. The method according to claim 1, wherein the printing area is composed of an array pattern composed of a plurality of repeating units, and the array patterns are fused with each other to form a film layer of the whole printing area by the fluidity of the ink and the hydrophilicity of the substrate.
4. The method of adjusting a target film thickness for inkjet printing according to claim 1, wherein the target film thickness is 100 to 500nm.
5. A method of adjusting a target film thickness for ink jet printing as claimed in claim 3, wherein said print zone is formed by a combination of one or more fill ratios.
6. A method of adjusting a target film thickness for ink jet printing according to claim 3, wherein said print zone is formed by one or more patterns.
7. The method of adjusting a target film thickness for inkjet printing according to claim 6 wherein the pattern is selected from one or more of a line, a circle, a rectangle, a square, a triangle, a diamond, a trapezoid, a parallelogram, and a pentagon.
8. A film printed by the method of adjusting a film thickness of an inkjet printing target according to any one of claims 1 to 7.
9. Use of a film printed by the method of adjusting a target film thickness for inkjet printing according to claim 8 in the photovoltaic field.
10. The use of a film printed by a method for adjusting a target film thickness for inkjet printing according to claim 9 in the photovoltaic field, wherein the use of a film printed by a method for adjusting a target film thickness for inkjet printing in an active layer and an interface finishing layer of a photovoltaic device.
CN202310455631.1A 2023-04-25 2023-04-25 Method and product for adjusting film thickness of ink-jet printing target and application thereof Pending CN116512789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310455631.1A CN116512789A (en) 2023-04-25 2023-04-25 Method and product for adjusting film thickness of ink-jet printing target and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310455631.1A CN116512789A (en) 2023-04-25 2023-04-25 Method and product for adjusting film thickness of ink-jet printing target and application thereof

Publications (1)

Publication Number Publication Date
CN116512789A true CN116512789A (en) 2023-08-01

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