CN111785857A - Thin film packaging material, manufacturing method thereof, thin film packaging structure and electronic device - Google Patents
Thin film packaging material, manufacturing method thereof, thin film packaging structure and electronic device Download PDFInfo
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- CN111785857A CN111785857A CN201910271190.3A CN201910271190A CN111785857A CN 111785857 A CN111785857 A CN 111785857A CN 201910271190 A CN201910271190 A CN 201910271190A CN 111785857 A CN111785857 A CN 111785857A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000010409 thin film Substances 0.000 title claims description 36
- 239000005022 packaging material Substances 0.000 title abstract description 18
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical group [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000012044 organic layer Substances 0.000 claims abstract description 23
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 19
- -1 germanium group compound Chemical class 0.000 claims abstract description 11
- 239000000178 monomer Substances 0.000 claims abstract description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 54
- 150000001875 compounds Chemical class 0.000 claims description 41
- 238000006243 chemical reaction Methods 0.000 claims description 34
- 229910052732 germanium Inorganic materials 0.000 claims description 33
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 29
- 239000011259 mixed solution Substances 0.000 claims description 28
- 239000010408 film Substances 0.000 claims description 27
- 238000005538 encapsulation Methods 0.000 claims description 26
- 239000000758 substrate Substances 0.000 claims description 22
- 239000012043 crude product Substances 0.000 claims description 20
- VHRYZQNGTZXDNX-UHFFFAOYSA-N methacryloyl chloride Chemical compound CC(=C)C(Cl)=O VHRYZQNGTZXDNX-UHFFFAOYSA-N 0.000 claims description 19
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- 125000002947 alkylene group Chemical group 0.000 claims description 12
- 125000003118 aryl group Chemical group 0.000 claims description 12
- 125000001072 heteroaryl group Chemical group 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 238000005886 esterification reaction Methods 0.000 claims description 11
- 239000012074 organic phase Substances 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 10
- 229910002027 silica gel Inorganic materials 0.000 claims description 10
- 238000000967 suction filtration Methods 0.000 claims description 10
- 239000007795 chemical reaction product Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 8
- 229910052763 palladium Inorganic materials 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 230000002194 synthesizing effect Effects 0.000 claims description 8
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 7
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 claims description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- 150000001263 acyl chlorides Chemical class 0.000 claims description 6
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 125000001033 ether group Chemical group 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims description 5
- 230000032050 esterification Effects 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- KCAOIDNJWQKARC-UHFFFAOYSA-N bromo(phenyl)germanium Chemical compound Br[Ge]C1=CC=CC=C1 KCAOIDNJWQKARC-UHFFFAOYSA-N 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 244000028419 Styrax benzoin Species 0.000 claims description 3
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 3
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 3
- 229960002130 benzoin Drugs 0.000 claims description 3
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 3
- 239000012965 benzophenone Substances 0.000 claims description 3
- 235000019382 gum benzoic Nutrition 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- 239000003566 sealing material Substances 0.000 claims 1
- 238000002834 transmittance Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000543 intermediate Substances 0.000 description 29
- 125000004432 carbon atom Chemical group C* 0.000 description 17
- 239000010410 layer Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 229910000078 germane Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- CXUWHAIYMDIHBD-UHFFFAOYSA-N phenoxygermanium Chemical compound [Ge]OC1=CC=CC=C1 CXUWHAIYMDIHBD-UHFFFAOYSA-N 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
-
- 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
Abstract
In the film packaging material, the manufacturing method thereof, the film packaging structure and the electronic device, the germanium group is introduced into the main chain or the side group of the acrylate monomer, the structural characteristics of the germanium group compound are utilized to improve the thermal stability and the light transmittance of the organic layer, and meanwhile, the tolerance of the organic layer to plasma is increased, so that the film packaging effect is improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a thin film encapsulation material, a method for manufacturing the thin film encapsulation material, a thin film encapsulation structure, and an electronic device.
Background
The organic electroluminescent device (OLED) is called a display device with the greatest application prospect because it has the characteristics of self-luminescence, high brightness, high contrast, low operating voltage, flexible display and the like. In recent years, with the development of curved panels and foldable display devices, various flexible OLED display devices having bendability have been developed.
A flexible OLED display device generally includes a substrate, an electroluminescent element on the substrate, and a thin film encapsulation structure on the electroluminescent element. For a flexible OLED device, the encapsulation effect of the thin film encapsulation structure directly affects the reliability and the service life of the flexible OLED device, and therefore, how to efficiently encapsulate the flexible OLED device to prolong the service life of the device is an important issue facing those skilled in the art.
The existing film packaging structure is generally formed by overlapping an inorganic packaging layer and an organic packaging layer, wherein the inorganic packaging layer can block external water vapor and oxygen, and the organic packaging layer can ensure the planarization of the surface of a packaging film and release stress. Meanwhile, the organic packaging layer has the function of coating particles, and defects in the inorganic layer are prevented from diffusing.
Currently, the organic layer is generally formed of an acrylic material or an epoxy material. However, these polymeric materials generally exhibit the characteristic of poor thermal stability. Meanwhile, since the inorganic layer is deposited by plasma, the plasma etches the organic layer during the deposition process, which destroys the encapsulation performance of the organic layer, and further causes the degradation of the OLED device.
Therefore, how to solve the problems of poor thermal stability and easy damage of the existing film packaging material becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present application provides a film packaging material to solve the problems of poor thermal stability and easy damage of the existing film packaging material.
In order to solve the above technical problem, the present invention provides a film packaging material, including: photoinitiators and compounds synthesized from germanium groups and acrylate functional groups;
the structure of the compound is shown as a formula I or a formula II:
wherein n is an integer of 0 to 30, and R1-R7 are hydrogen, alkyl, cycloalkyl, aryl or heteroaryl; A3-A8 are aryl or heteroaryl; l1 to L4 are alkylene groups or alkylene ether groups.
Optionally, in the film encapsulating material, the structural formula of the acrylate functional group is:
wherein x represents a position bonded to L1, L2 or L4, and Y is hydrogen or an alkyl group.
Optionally, in the film encapsulating material, the photoinitiator includes any one of acetophenone, benzophenone, benzoin, and phosphorus initiators, or any combination thereof.
The invention also provides a manufacturing method of the film packaging material, which comprises the following steps:
providing methacryloyl chloride and a germanium-based intermediate having a hydroxyl group;
synthesizing the methacryloyl chloride and the germanium-based intermediate into a compound through esterification reaction of acyl chloride and hydroxyl, wherein the compound is synthesized from germanium and acrylate functional groups; and
a photoinitiator is provided and the compound is mixed with the photoinitiator.
Optionally, in the method for manufacturing a thin film encapsulation material, the step of synthesizing the methacryloyl chloride and the germanium-based intermediate into a compound through an esterification reaction of an acid chloride and a hydroxyl group includes:
placing triethylamine and the germanium-based intermediate with the hydroxyl group in the same reaction vessel;
adding dichloromethane to the reaction vessel to form a first mixed solution;
dissolving the methacryloyl chloride in methylene chloride to form a second mixed solution;
dropwise adding the second mixed solution into the first mixed solution to perform reaction;
carrying out suction filtration and concentration to obtain a crude product of the target compound; and
and purifying the crude product by a 200-300-mesh silica gel column.
Optionally, in the method for manufacturing a thin film encapsulation material, a process for manufacturing the germanium-based intermediate having a hydroxyl group includes:
under the protection of nitrogen, putting phenyl germanium bromide and tetratriphenylphosphine palladium into the same reaction vessel;
adding a nitrogen-bubbled hydroxyl phenyl germanium ethanol borate solution and a sodium carbonate aqueous solution into the reaction vessel to form a mixed solution;
adding degassed toluene into the mixed solution for refluxing;
pouring the reaction product into distilled water, and extracting by adopting dichloromethane;
washing with saturated salt water to neutrality;
the organic phases are combined and dried by anhydrous magnesium sulfate;
carrying out suction filtration and concentration to obtain a crude product of a target intermediate; and
and purifying the crude product by a 200-300-mesh silica gel column.
Optionally, in the method for manufacturing a thin film encapsulation material, a process for manufacturing the germanium-based intermediate having a hydroxyl group includes:
under the protection of nitrogen, putting phenoxy bromine germanium and tetratriphenylphosphine palladium in the same reaction vessel;
adding a nitrogen-bubbled hydroxyl phenyl germanium ethanol borate solution and a sodium carbonate aqueous solution into the reaction vessel to form a mixed solution;
adding degassed toluene into the mixed solution for refluxing;
pouring the reaction product into distilled water, and extracting by adopting dichloromethane;
washing with saturated salt water to neutrality;
the organic phases are combined and dried by anhydrous magnesium sulfate;
carrying out suction filtration and concentration to obtain a crude product of a target intermediate; and
and purifying the crude product by a 200-300-mesh silica gel column.
The present invention also provides a thin film encapsulation structure, including: laminating alternating inorganic and organic layers;
wherein, the organic layer adopts the thin film packaging material.
The present invention also provides an electronic device comprising: a substrate, a functional device and a thin film encapsulation structure as described above;
the functional device and the film packaging structure are sequentially formed on the substrate, and the film packaging structure is used for packaging the functional device.
According to the film packaging material, the manufacturing method thereof, the film packaging structure and the electronic device, the germanium group is introduced into the main chain or the side group of the acrylate monomer, the thermal stability and the light transmittance of the organic layer are improved by utilizing the structural characteristics of the germanium group compound, the tolerance of the organic layer to plasma is improved, and the film packaging effect is further improved.
Drawings
The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so that the features and advantages of the present invention will be more apparent.
FIG. 1 is a schematic structural diagram of a thin film package structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
The present invention provides a novel thin film encapsulation material, comprising: a compound synthesized from germanium groups and acrylate functional groups and a photoinitiator;
the structure of the compound is shown as a formula I or a formula II:
wherein n is an integer of 0 to 30, and R1-R7 are hydrogen, alkyl, cycloalkyl, aryl or heteroaryl; A3-A8 are aryl or heteroaryl; l1 to L4 are alkylene groups or alkylene ether groups.
Specifically, in the compound shown in the formula I, the main chain is a germane oxygen alkane structure, and the side chain is a germane alkane structure. In the compound shown in the formula II, the main chain is of a germane structure, and the side chain is of a germane oxygen structure.
In the compound shown in the formula I, R1-R7 are hydrogen, alkyl, cycloalkyl, aryl or heteroaryl, wherein the alkyl has 1-10 carbon atoms, the cycloalkyl has 3-30 carbon atoms, the aryl has 6-30 carbon atoms, and the heteroaryl has 3-30 carbon atoms. L1 to L2 are alkylene groups having 1 to 30 carbon atoms or alkylene ether groups having 1 to 50 carbon atoms. L1 to L2 are alkylene groups having 1 to 30 carbon atoms or alkylene ether groups having 1 to 50 carbon atoms. Wherein, L1 and L2 may be the same or different.
In the compound shown in the formula II, A3-A8 are aryl or heteroaryl, the aryl has 6-30 carbon atoms, and the heteroaryl has 3-30 carbon atoms. R1 and R6 are hydrogen, alkyl, cycloalkyl, aryl or heteroaryl, wherein the alkyl has 1-10 carbon atoms, the cycloalkyl has 3-30 carbon atoms, the aryl has 6-30 carbon atoms, and the heteroaryl has 3-30 carbon atoms. L1 to L4 are alkylene groups having 1 to 30 carbon atoms or alkylene ether groups having 1 to 50 carbon atoms. Wherein, A3-A8 may be the same or different. L1 to L4 may be the same or different.
The acrylate is a generic term for esters of acrylic acid and its homologues, including methyl acrylate, ethyl acrylate, 2-methyl methacrylate, 2-ethyl methacrylate, and the like. The acrylate functionality includes methyl acrylate functionality, ethyl acrylate functionality, methyl 2-methacrylate functionality, ethyl 2-methacrylate functionality, and the like. The structural formula of the acrylate functional group is as follows:
wherein x represents a position bonded to L1, L2 or L4, and Y is hydrogen or an alkyl group. In this embodiment, the alkyl group has 1 to 10 carbon atoms.
The compound is mixed with a photoinitiator, wherein the photoinitiator comprises any one or any combination of acetophenone, benzophenone, benzoin and phosphorus initiators and is used for causing photocuring reaction.
In the film packaging material, the germanium group and the acrylate functional group act synergistically, so that the film packaging material is not only beneficial to light transmission, but also has higher bond energy, and therefore, the compound has good light transmittance and thermal stability, and can resist the bombardment of plasma. Therefore, the film packaging material is used as the organic layer for film packaging, so that the thermal stability and light transmittance of the organic layer can be improved, and the tolerance of the organic layer to plasma can be increased.
Correspondingly, the invention also provides a manufacturing method of the film packaging material, which comprises the following steps:
the method comprises the following steps: providing methacryloyl chloride and a germanium-based intermediate having a hydroxyl group (-OH);
step two: synthesizing the methacryloyl chloride and the germanium-based intermediate into a compound through esterification of acyl chloride and hydroxyl, wherein the compound is synthesized from germanium and acrylate functional groups;
step three: a photoinitiator is provided and the compound is mixed with the photoinitiator.
In particular, methacryloyl chloride is an intermediate product, and can be directly purchased from the market. The structural formula of methacryloyl chloride is:
in this example, the germanium-based intermediate having a hydroxyl group was prepared using tetratriphenylphosphine palladium and phenyl germanium bromide as raw materials. The specific reaction equation is as follows:
the preparation process of the germanium-based intermediate with the hydroxyl group comprises the following steps: firstly, phenyl germanium bromide (23.61g, 61.2mmol) and tetratriphenylphosphine palladium (6.93g, 6.0mmol) are placed in the same reaction vessel (for example, a 500mL three-neck flask) under the protection of nitrogen; next, a nitrogen-sparged phenylgermanium hydroxy borate ethanol solution (36.96g, 122.4mmol) and an aqueous sodium carbonate solution (100mL, 2M) in units of M, i.e., mol/L, were added to the reaction vessel to form a mixed solution; then, degassed toluene (200mL) was added to the mixed solution, and the reaction was performed under reflux for 12 hours; then, the reaction product was poured into 100mL of distilled water and extracted three times with dichloromethane, 100mL of dichloromethane being used each time; then, washing the mixture by using saturated salt water until the mixture is neutral; then, combining organic phases, wherein the organic phases refer to a mixture of the reaction product and dichloromethane; the organic phase is then dried over anhydrous magnesium sulfate; then, a crude product of the target intermediate is obtained through suction filtration and concentration; and finally, purifying the crude product through a 200-300-mesh silica gel column to obtain a target intermediate.
In another embodiment of the invention, the germanium-based intermediate with hydroxyl is prepared by taking palladium tetratriphenylphosphine and phenoxy germanium bromide as raw materials. The specific reaction equation is as follows:
the preparation process of the germanium-based intermediate with the hydroxyl group comprises the following steps: firstly, under the protection of nitrogen, phenoxy germanium bromide (25.56g, 61.2mmol) and tetratriphenylphosphine palladium (6.93g, 6.0mmol) are placed in the same reaction vessel (for example, a 500mL three-neck flask); next, a nitrogen-bubbled alcoholic solution of phenoxygermanium hydroxyborate (40.97g, 122.4mmol) and aqueous sodium carbonate (100mL, 2M) were added to the reaction vessel to form a mixed solution; then, degassed toluene (200mL) was added to the mixed solution, and the reaction was performed under reflux for 12 hours; then, the reaction product was poured into 100mL of distilled water and extracted three times with dichloromethane, 100mL of dichloromethane being used each time; then, washing the mixture by using saturated salt water until the mixture is neutral; then, combining organic phases, wherein the organic phases refer to a mixture of the reaction product and dichloromethane; the organic phase is then dried over anhydrous magnesium sulfate; then, a crude product of the target intermediate is obtained through suction filtration and concentration; and finally, purifying the crude product through a 200-300-mesh silica gel column to obtain a target intermediate.
The above-described germanium-based intermediate having a hydroxyl group and the preparation method thereof are merely examples and are not limited, and in other embodiments of the present invention, the germanium-based intermediate having a hydroxyl group may be prepared by using other raw materials and other methods.
After obtaining the germanium-based intermediate having a hydroxyl group, methacryloyl chloride and the germanium-based intermediate are synthesized into a compound by an esterification reaction of an acid chloride and a hydroxyl group. In this example, the reaction equation for synthesizing methacryloyl chloride and the germanium-based intermediate into a compound by esterification of acyl chloride and hydroxyl group is:
specifically, the process for synthesizing the methacrylic chloride and the germanium-based intermediate into the compound through the esterification reaction of the acyl chloride and the hydroxyl comprises the following steps:
first, triethylamine (0.15g, 1.5mmol) and the germanium-based intermediate having a hydroxyl group (0.78g, 1mmol) were placed in the same reaction vessel;
next, dichloromethane (10mL) was added to the reaction vessel to form a first mixed solution;
thereafter, methacryloyl chloride (0.15g, 1.5mmol) was dissolved in dichloromethane to form a second mixed solution;
then, the second mixed solution was added dropwise to the first mixed solution to carry out a reaction, ice bath control was carried out for 30 minutes at the beginning of the reaction, and then a room-temperature reaction was carried out for 24 hours;
then, obtaining a crude product of the target compound through suction filtration and concentration;
and finally, purifying the crude product through a 200-300-mesh silica gel column to obtain a target compound, wherein the target compound introduces a germanium group into a main chain or a side group of the acrylate monomer.
In another embodiment of the present invention, the formula for the esterification of the acid chloride and the hydroxyl group to synthesize the methacryloyl chloride and the germanium-based intermediate into a compound is:
specifically, the process for synthesizing the methacrylic chloride and the germanium-based intermediate into the compound through the esterification reaction of the acyl chloride and the hydroxyl comprises the following steps:
first, triethylamine (0.30g, 3mmol) and the germanium-based intermediate having a hydroxyl group (0.87g, 1mmol) were placed in the same reaction vessel;
next, dichloromethane (10mL) was added to the reaction vessel to form a first mixed solution;
thereafter, methacryloyl chloride (0.30g, 3mmol) was dissolved in dichloromethane to form a second mixed solution;
then, the second mixed solution was added dropwise to the first mixed solution to carry out a reaction, ice bath control was carried out for 30 minutes at the beginning of the reaction, and then a room-temperature reaction was carried out for 24 hours;
then, obtaining a crude product of the target compound through suction filtration and concentration;
and finally, purifying the crude product through a 200-300-mesh silica gel column to obtain a target compound, wherein the target compound introduces a germanium group into a main chain or a side group of the acrylate monomer.
It should be noted that the above compounds and the preparation method thereof are only examples and not limitations, and in other embodiments of the present invention, different germanium-based intermediates and processes may be used as long as the compounds synthesized from germanium and acrylate functional groups can be synthesized by esterification of acid chloride and hydroxyl group.
After the target compound is formed, the target compound is mixed with a photoinitiator, whereby the thin film encapsulation material is obtained. The film packaging material not only has better thermal stability and light transmittance, but also can resist the bombardment of plasma, and avoids the performance deterioration of an OLED device caused by the damage of the packaging performance due to the etching of the plasma.
Correspondingly, the invention also provides a film packaging structure. Fig. 1 is a schematic structural diagram of a thin film package structure according to an embodiment of the invention. As shown in fig. 1, the thin film encapsulation structure 30 includes: alternating inorganic layers 31 and organic layers 32 are stacked, and the organic layers 32 employ a thin film encapsulation material as described above.
Correspondingly, the invention also provides an electronic device. Fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the invention. As shown in fig. 2, the electronic device 1 includes a substrate 10, a functional device 20, and a thin film encapsulation structure 30 as described above; the functional device 20 and the thin film encapsulation structure 30 are sequentially formed on the substrate 10, and the thin film encapsulation structure 30 is used for encapsulating the functional device 20.
Specifically, the substrate 10 may be a rigid substrate, or may be a flexible substrate, preferably a flexible substrate, so as to implement a flexible display function. The rigid substrate may be, for example, a glass substrate or a quartz substrate. The flexible substrate may be an organic polymer substrate such as a polyimide substrate (PI substrate), a polyamide substrate, a polycarbonate substrate, or a polyether sulfone substrate.
The functional device 20 includes, but is not limited to, an electroluminescent element (e.g., OLED), a liquid crystal display device, a solar cell, a thin film battery, an organic sensor, and other electronic devices.
The thin film encapsulation structure 30 includes organic layers and inorganic layers alternately stacked, and the thin film positioned at the lowermost layer and/or the uppermost layer may be either an organic layer or an inorganic layer. The organic layer is made of the thin film packaging material, and the thin film packaging material contains a compound synthesized by a germanium group and an acrylate functional group, so that the organic layer has good thermal stability and light transmittance, and has stronger tolerance to plasma. Therefore, in the process of forming the inorganic layer by the plasma deposition process, the organic layer can also be prevented or reduced from being damaged, so that the packaging effect of the thin film packaging structure 30 is ensured, and the problem of performance degradation of an electronic device is avoided.
In summary, according to the film packaging material, the manufacturing method thereof, the film packaging structure and the electronic device provided by the invention, the germanium group is introduced into the main chain or the side group of the acrylate monomer, the structural characteristics of the germanium group compound are utilized to improve the thermal stability and the light transmittance of the organic layer, and meanwhile, the tolerance of the organic layer to plasma is increased, so that the film packaging effect is improved.
The foregoing is a more detailed description of the present application in connection with specific preferred embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (9)
1. A thin film encapsulation material, comprising: photoinitiators and compounds synthesized from germanium groups and acrylate functional groups;
the structure of the compound is shown as a formula I or a formula II:
wherein n is an integer of 0 to 30, and R1-R7 are hydrogen, alkyl, cycloalkyl, aryl or heteroaryl; A3-A8 are aryl or heteroaryl; l1 to L4 are alkylene groups or alkylene ether groups.
2. The film encapsulating material of claim 1, wherein the acrylate functional group has the formula:
wherein x represents a position bonded to L1, L2 or L4, and Y is hydrogen or an alkyl group.
3. The film encapsulation material according to claim 1, wherein the photoinitiator comprises any one or any combination of acetophenone, benzophenone, benzoin, and phosphorus initiators.
4. A method of manufacturing a thin film encapsulation material, comprising:
providing methacryloyl chloride and a germanium-based intermediate having a hydroxyl group;
synthesizing the methacryloyl chloride and the germanium-based intermediate into a compound through esterification of acyl chloride and hydroxyl, wherein the compound is synthesized from germanium and acrylate functional groups; and
a photoinitiator is provided and the compound is mixed with the photoinitiator.
5. The method of manufacturing a thin film sealing material according to claim 4, wherein the process of synthesizing the methacryloyl chloride and the germanium-based intermediate into a compound through an esterification reaction of an acid chloride and a hydroxyl group comprises:
placing triethylamine and the germanium-based intermediate with the hydroxyl group in the same reaction vessel;
adding dichloromethane to the reaction vessel to form a first mixed solution;
dissolving the methacryloyl chloride in methylene chloride to form a second mixed solution;
dropwise adding the second mixed solution into the first mixed solution to perform reaction;
carrying out suction filtration and concentration to obtain a crude product of the target compound; and
and purifying the crude product by a 200-300-mesh silica gel column.
6. The method of claim 5, wherein the germanium-based intermediate having a hydroxyl group is produced by a process comprising:
under the protection of nitrogen, putting phenyl germanium bromide and tetratriphenylphosphine palladium into the same reaction vessel;
adding a nitrogen-bubbled hydroxyl phenyl germanium ethanol borate solution and a sodium carbonate aqueous solution into the reaction vessel to form a mixed solution;
adding degassed toluene into the mixed solution for refluxing;
pouring the reaction product into distilled water, and extracting by adopting dichloromethane;
washing with saturated salt water to neutrality;
the organic phases are combined and dried by anhydrous magnesium sulfate;
carrying out suction filtration and concentration to obtain a crude product of a target intermediate; and
and purifying the crude product by a 200-300-mesh silica gel column.
7. The method of claim 5, wherein the germanium-based intermediate having a hydroxyl group is produced by a process comprising:
under the protection of nitrogen, putting phenoxy bromine germanium and tetratriphenylphosphine palladium in the same reaction vessel;
adding a nitrogen-bubbled B monomer ethanol solution and a sodium carbonate aqueous solution into the reaction vessel to form a mixed solution;
adding degassed toluene into the mixed solution for refluxing;
pouring the reaction product into distilled water, and extracting by adopting dichloromethane;
washing with saturated salt water to neutrality;
the organic phases are combined and dried by anhydrous magnesium sulfate;
carrying out suction filtration and concentration to obtain a crude product of a target intermediate; and
and purifying the crude product by a 200-300-mesh silica gel column.
8. A thin film encapsulation structure, comprising: laminating alternating inorganic and organic layers; wherein the organic layer adopts the thin film encapsulation material as claimed in any one of claims 1 to 3.
9. An electronic device, comprising: a substrate, a functional device and the thin film encapsulation structure of claim 8;
the functional device and the film packaging structure are sequentially formed on the substrate, and the film packaging structure is used for packaging the functional device.
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