CN113248976A - Ink for ink-jet printing luminescent material and preparation method thereof - Google Patents
Ink for ink-jet printing luminescent material and preparation method thereof Download PDFInfo
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- CN113248976A CN113248976A CN202110446109.8A CN202110446109A CN113248976A CN 113248976 A CN113248976 A CN 113248976A CN 202110446109 A CN202110446109 A CN 202110446109A CN 113248976 A CN113248976 A CN 113248976A
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- 238000007641 inkjet printing Methods 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000002904 solvent Substances 0.000 claims abstract description 34
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229920000642 polymer Polymers 0.000 claims abstract description 27
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims abstract description 14
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Substances ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 claims abstract description 12
- 229920002098 polyfluorene Polymers 0.000 claims abstract description 12
- 235000019445 benzyl alcohol Nutrition 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000003960 organic solvent Substances 0.000 claims abstract description 11
- MVPPADPHJFYWMZ-IDEBNGHGSA-N chlorobenzene Chemical group Cl[13C]1=[13CH][13CH]=[13CH][13CH]=[13CH]1 MVPPADPHJFYWMZ-IDEBNGHGSA-N 0.000 claims abstract description 3
- 239000011259 mixed solution Substances 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 238000009736 wetting Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 39
- 238000005303 weighing Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 12
- 238000003756 stirring Methods 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000879 optical micrograph Methods 0.000 description 6
- -1 polytetrafluoroethylene Polymers 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002508 contact lithography Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- XKBGEWXEAPTVCK-UHFFFAOYSA-M methyltrioctylammonium chloride Chemical compound [Cl-].CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC XKBGEWXEAPTVCK-UHFFFAOYSA-M 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001542 size-exclusion chromatography Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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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
- C09D11/50—Sympathetic, colour changing or similar inks
-
- 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
-
- 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
- C09D11/36—Inkjet printing inks based on non-aqueous solvents
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention belongs to the field of printed electronics, and discloses an ink-jet printing luminescent material ink and a preparation method thereof, wherein the ink-jet printing luminescent material ink comprises a low molecular weight polyfluorene polymer luminescent material, an organic solvent and a viscosity adjusting solvent; the number average molecular weight of the polymer luminescent material is less than 3 ten thousand, and the polymer luminescent material has a structural formula shown in a formula I, wherein the value of n is 0.3-0.6; the organic solvent is chlorobenzene or cyclohexanone, and the viscosity adjusting solvent is a blending solvent of cyclohexylbenzene and benzyl alcohol. In the blending viscosity adjusting solvent, the benzyl alcohol which is a high-viscosity poor solvent is selected, so that the stability of a liquid film printed on the surface of a substrate by the ink is effectively improved, the solubility of the solvent is reduced, the ink loses fluidity earlier, and the de-wetting is inhibited. The prepared ink has stable ink discharge state and good film forming uniformity.
Description
Technical Field
The invention belongs to the field of printed electronics, and particularly relates to low-molecular-weight polyfluorene polymer luminescent material ink-jet printing ink, a preparation method thereof and application thereof in manufacturing of an organic light-emitting diode.
Background
The solution processing type organic electroluminescent diode has the advantages of simple preparation process, low cost, easy large-area processing, preparation on a flexible substrate and the like, and shows great application prospect in the field of organic light-emitting display. The ink-jet printing is a non-contact printing technology, has the advantages of high material utilization rate, suitability for flexible processing, capability of realizing patterned processing without a mask plate and the like, and becomes a film-forming technology which has the most potential for processing and preparing large-area flexible display screens.
The development of an organic luminescent material solution which has stable ink-jet printing performance and can improve the uniformity of an organic luminescent film in ink-jet printing deposition is one of the keys for realizing the ink-jet printing processing of a color organic luminescent display device. For ink-jet printing of low molecular weight polymeric phosphors, the main problem is to overcome the tendency of ink-jet printed films to dewet and edge deposit and achieve uniform pinhole-free film deposition. The low molecular weight polymers generally have poor film forming properties due to their low solution viscosity. Meanwhile, the thin film obtained by depositing the low-molecular-weight polymer luminescent material by ink-jet printing has a coffee ring effect, so that the thickness of the thin film is not uniform, and the performance of a luminescent device processed by the thin film is seriously influenced.
Disclosure of Invention
In order to solve the problems of poor film forming property and poor film uniformity of the low molecular weight polymer luminescent layer film, the invention provides ink for improving the uniformity of the low molecular weight polymer luminescent layer film for ink-jet printing by using a blending viscosity adjusting solvent and a film preparation method.
An ink-jet printing luminescent material ink comprises a low molecular weight polyfluorene polymer luminescent material, an organic solvent and a viscosity adjusting solvent;
the number average molecular weight of the polymer luminescent material is less than 3 ten thousand, and the structural formula is as follows:
wherein the value of n is 0.3-0.6;
the organic solvent is chlorobenzene or cyclohexanone, and the viscosity adjusting solvent is a blending solvent of cyclohexylbenzene and benzyl alcohol.
Preferably, n is 0.4 ± 0.1.
Preferably, the volume ratio of the cyclohexylbenzene to the benzyl alcohol is 7: 1-3: 1.
Preferably, in the ink, the concentration of the polymer luminescent material is 5-10 mg/ml, and the volume ratio of the organic solvent to the viscosity adjusting solvent is (60-80): (40-20).
A preparation method of ink for an ink-jet printing luminescent material comprises the steps of uniformly mixing a polymer luminescent layer material, an organic solvent and a viscosity adjusting solvent to form a mixed solution, heating and stirring at 55-65 ℃ for 0.5-1 h, and filtering to obtain the ink for the polymer luminescent layer.
Preferably, the filtration process employs a filter head diameter of 0.2 μm.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the low molecular weight polyfluorene polymer luminescent material is selected, the ink for ink-jet printing of the low molecular weight polyfluorene polymer luminescent layer is obtained by limiting the organic solvent and the viscosity adjusting solvent, the viscosity of the ink is effectively improved by blending the viscosity adjusting solvent, the dewetting speed of a liquid film in the printing process of the low molecular weight polyfluorene polymer luminescent layer film is reduced, and the film forming property of the low molecular weight polyfluorene polymer luminescent layer film is improved; in the blending viscosity adjusting solvent, the benzyl alcohol which is a high-viscosity poor solvent is selected, so that the stability of a liquid film printed on the surface of a substrate by the ink is effectively improved, the solubility of the solvent is reduced, the ink loses fluidity earlier, and the de-wetting is inhibited. The luminescent layer in the organic light-emitting diode is printed by adopting the ink in an ink-jet mode, the ink discharging state is stable, and the film forming uniformity is good.
Drawings
Figure 1 is an optical microscope image of PF60TPA40 ink jet printed PF60TPA40 film deposited into a restrictive channel in example 1.
Figure 2 is a cross-sectional height view of PF60TPA40 ink jet printed PF60TPA40 film deposited into a restrictive channel in example 1.
Figure 3 is an optical microscope image of PF60TPA40 ink jet printed PF60TPA40 film deposited into the restrictive channel of comparative example 1.
Figure 4 is a cross-sectional height view of PF60TPA40 ink jet printed PF60TPA40 film deposited into a restrictive channel in comparative example 1.
Figure 5 is an optical microscope image of PF60TPA40 ink jet printed PF60TPA40 film deposited into the restrictive channel of comparative example 2.
Figure 6 is a cross-sectional height view of PF60TPA40 ink jet printed PF60TPA40 film deposited into a restrictive channel in comparative example 2.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto, and may be carried out with reference to conventional techniques for process parameters not particularly noted.
The material PF60TPA40 can be prepared by the method disclosed in U.S. Pat. No. 5,577,070A, and the reaction raw materials, the catalyst and the solvent are purchased from the conventional reagent vendors and are directly used without further treatment. The specific synthesis steps are as follows:
a reaction material M1(0.29g,0.5mmol), a reaction material M2(0.05g,0.1mmol), a reaction material M3(0.16g,0.4mmol), tetrakis (triphenylphosphine) palladium (0.01g, 0.01mmol), Aliquat 336(0.1mL), an aqueous solution (2mL) of potassium carbonate (0.55g, 4mmol), and toluene (10mL) with water and oxygen removed were added to a reaction vessel under an argon atmosphere, and heated and stirred at 96 ℃ for 24 hours. After the reaction is finished, pouring the mixture into dichloromethane, washing the dichloromethane with sodium chloride aqueous solution and distilled water in sequence, drying and concentrating an organic phase by using anhydrous sodium sulfate, then dripping the organic phase into methanol, and drying the obtained precipitate in vacuum to obtain the compound. The product is identified as PF60TPA40 by nuclear magnetic identification. The calculated yield was 55.2%. The number average molecular weight (Mn) was 2.39 x 10 by size exclusion chromatography4Da, polydispersity index (PDI) 1.92.
Example 1
Firstly, weighing 5.0 mg of PF60TPA40, placing the weighed mixture in a container, weighing 0.6 ml of chlorobenzene, adding the chlorobenzene in the container to form a mixed solution, weighing 0.7 ml of cyclohexylbenzene, blending the cyclohexylbenzene and 0.1ml of benzyl alcohol to form a viscosity adjusting solvent, weighing 0.4 ml of the blended viscosity adjusting solvent, placing the blended viscosity adjusting solvent in the mixed solution, and stirring the mixed solution at the temperature of 60 ℃ for 0.5 h; then filtering by adopting a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink for ink-jet printing of the low molecular weight polyfluorene polymer luminescent material.
The above ink is printed into an organic luminescent film by ink-jet printing, fig. 1 is an optical microscope image of a PF60TPA40 film deposited into a restrictive channel by solution ink-jet printing of PF60TPA40 in example 1, and fig. 2 is a cross-sectional height view of a PF60TPA40 film deposited into a restrictive channel by ink-jet printing of PF60TPA40 in example 1. As can be seen from fig. 1 and 2, the PF60TPA40 thin film located between the two raised restriction patterns in the figures is continuous, and the cross-sectional height of the thin film is uniform, which proves that the three-solvent system effectively suppresses the dewetting and coffee ring effects, and finally obtains an organic light-emitting layer with a thickness of 35 to 45nm and a film formation uniformity of 95%.
Example 2
Firstly, weighing 7.0 mg of PF60TPA40, placing the weighed PF60TPA40 in a container, then weighing 0.7 ml of cyclohexanone, adding the weighed cyclohexanone into the container to form a mixed solution, then weighing 0.6 ml of cyclohexylbenzene, blending the cyclohexylbenzene and 0.2 ml of benzyl alcohol to form a viscosity adjusting solvent, then placing 0.3 ml of the blended viscosity adjusting solvent into the mixed solution, and stirring for 0.5h at the temperature of 60 ℃; then filtering by adopting a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink for ink-jet printing of the low molecular weight polyfluorene polymer luminescent material. And printing the ink into an organic light-emitting film in an ink-jet printing mode to finally obtain an organic light-emitting layer with the thickness of 35-45 nm and the film-forming uniformity of 95%.
Example 3
Firstly, weighing 5.0 mg of PF60TPA40 in a container, weighing 0.6 ml of chlorobenzene in the container to form a mixed solution, weighing 0.6 ml of cyclohexylbenzene and 0.2 ml of benzyl alcohol to blend to form a viscosity adjusting solvent, then putting 0.4 ml of the blended viscosity adjusting solvent in the mixed solution, and stirring for 0.5h at 60 ℃; then filtering by adopting a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink for ink-jet printing of the low molecular weight polyfluorene polymer luminescent material. And printing the ink into an organic light-emitting film in an ink-jet printing mode to finally obtain an organic light-emitting layer with the thickness of 35-45 nm and the film-forming uniformity of 95%.
Example 4
Firstly, weighing 10.0 mg of PF60TPA40, placing the weighed 10.0 mg of PF60TPA40 in a container, then weighing 0.8 ml of cyclohexanone, adding the weighed cyclohexanone into the container to form a mixed solution, then weighing 0.6 ml of cyclohexylbenzene, blending 0.2 ml of benzyl alcohol to form a viscosity adjusting solvent, then placing 0.2 ml of the blended viscosity adjusting solvent into the mixed solution, and stirring for 0.5h at the temperature of 60 ℃; then filtering by adopting a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink for ink-jet printing of the low molecular weight polyfluorene polymer luminescent material. And printing the ink into an organic light-emitting film in an ink-jet printing mode to finally obtain an organic light-emitting layer with the thickness of 35-45 nm and the film-forming uniformity of 95%.
Comparative example 1
Firstly, weighing 5.0 mg of PF60TPA40 in a container, then weighing 1.0 ml of chlorobenzene in the container to form a mixed solution, and stirring for 0.5h at 60 ℃; then filtering by a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink. And printing the ink into the organic light-emitting film in an ink-jet printing mode. Fig. 3 is an optical microscope image of PF60TPA40 film inkjet-deposited into the restrictive channel by PF60TPA40 solution in comparative example 1, and fig. 4 is a cross-sectional height view of PF60TPA40 film inkjet-deposited into the restrictive channel by PF60TPA40 ink in comparative example 1, and as can be seen from fig. 3 and 4, the film uniformity of PF60TPA40 film located in the middle of two raised restrictive patterns in the figures is poor, and there is dewetting and severe edge deposition.
Comparative example 2
Firstly, weighing 5.0 mg of PF60TPA40 in a container, weighing 0.6 ml of chlorobenzene in the container to form a mixed solution, weighing 0.4 ml of cyclohexylbenzene in the mixed solution, and stirring for 0.5h at 60 ℃; then filtering by a polytetrafluoroethylene microporous filter head with the diameter of 0.2 mu m to obtain the ink. The above ink was printed into an organic light emitting film by ink jet printing, fig. 5 is an optical microscope image of a PF60TPA40 film deposited into a restrictive channel by solution ink jet printing of PF60TPA40 in comparative example 1, fig. 6 is a cross-sectional height view of a PF60TPA40 film deposited into a restrictive channel by ink jet printing of PF60TPA40 in comparative example 1, and as can be seen from fig. 5 and 6, the film uniformity of the PF60TPA40 film located in the middle of two tall restrictive patterns in the figure was poor, and an organic light emitting layer having a film formation uniformity of 70% was obtained.
The performance of the inkjet printing devices obtained in example 1 and comparative example 2 was measured using a current-voltage-luminance (IVL) measurement system, and the measurement results are shown in table 1.
TABLE 1
As can be seen from the data of table 1, the device obtained in example 1 has higher efficiency than comparative example 2, thereby showing that the efficiency of the inkjet printing device can be improved by the definition of the viscosity-adjusting solvent.
Claims (7)
1. An ink for ink-jet printing luminescent material, which is characterized in that: the ink-jet printing luminescent material ink comprises a low-molecular-weight polyfluorene polymer luminescent material, an organic solvent and a viscosity adjusting solvent;
the number average molecular weight of the polymer luminescent material is less than 3 ten thousand, and the structural formula is as follows:
wherein the value of n is 0.3-0.6;
the organic solvent is chlorobenzene or cyclohexanone, and the viscosity adjusting solvent is a blending solvent of cyclohexylbenzene and benzyl alcohol.
2. The inkjet-printed luminescent material ink according to claim 1, wherein n is 0.4 ± 0.1.
3. The inkjet printing luminescent material ink according to claim 1 or 2, wherein the volume ratio of the cyclohexylbenzene to the benzyl alcohol is 7:1 to 3: 1.
4. The ink for the luminescent material of inkjet printing according to claim 3, wherein the concentration of the polymer luminescent material in the ink is 5-10 mg/ml, and the volume ratio of the organic solvent to the viscosity adjusting solvent is (60-80): (40-20).
5. The method for preparing the ink according to any one of claims 1 to 4, wherein the polymer light-emitting layer material, the organic solvent and the viscosity adjusting solvent are uniformly mixed to form a mixed solution, and then the mixed solution is heated and stirred at 55 to 65 ℃ for 0.5 to 1 hour, and then the mixed solution is filtered to obtain the ink of the polymer light-emitting layer.
6. The method of producing ink according to claim 5, wherein the filter head diameter used in the filtering process is 0.2 μm.
7. Use of the ink of any one of claims 1 to 4 for the preparation of a polymer light-emitting layer film.
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| CN202110446109.8A CN113248976A (en) | 2021-04-25 | 2021-04-25 | Ink for ink-jet printing luminescent material and preparation method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922744A (en) * | 2004-02-18 | 2007-02-28 | 默克专利有限公司 | Solutions of organic semiconductors |
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- 2021-04-25 CN CN202110446109.8A patent/CN113248976A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922744A (en) * | 2004-02-18 | 2007-02-28 | 默克专利有限公司 | Solutions of organic semiconductors |
Non-Patent Citations (2)
| Title |
|---|
| ZHONGHUI DU ET AL: "Controlling the polarity and viscosity of small molecule ink to suppress thecontact line receding and coffee ring effect during inkjet printing", 《COLLOIDS AND SURFACES A》, vol. 602, 1 June 2020 (2020-06-01), pages 1 - 7 * |
| ZHONGHUI DU ET AL: "Controlling the polymer ink"s rheological properties and viscoelasticity to suppress satellite droplets", 《POLYMER》, vol. 138, 19 January 2018 (2018-01-19), pages 75 - 82 * |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 388, Lianyun Road, Huangpu District, Guangzhou, Guangdong 510530 Applicant after: Huangpu Material Research Institute Dawan District Guangdong Hong Kong and Macao Address before: No. 388, Lianyun Road, Huangpu District, Guangzhou, Guangdong 510530 Applicant before: Huangpu Institute of advanced materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |