WO2018105177A1 - インク組成物およびこれを用いた有機電界発光素子 - Google Patents
インク組成物およびこれを用いた有機電界発光素子 Download PDFInfo
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- WO2018105177A1 WO2018105177A1 PCT/JP2017/030522 JP2017030522W WO2018105177A1 WO 2018105177 A1 WO2018105177 A1 WO 2018105177A1 JP 2017030522 W JP2017030522 W JP 2017030522W WO 2018105177 A1 WO2018105177 A1 WO 2018105177A1
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- 239000000203 mixture Substances 0.000 title claims abstract description 141
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 172
- -1 ethyleneoxy group Chemical group 0.000 claims abstract description 115
- 150000001875 compounds Chemical class 0.000 claims abstract description 59
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 54
- 239000000178 monomer Substances 0.000 claims abstract description 49
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- 125000000217 alkyl group Chemical group 0.000 claims abstract description 26
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003505 polymerization initiator Substances 0.000 claims abstract description 17
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 14
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- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 23
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 13
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 13
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 10
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 10
- 150000001336 alkenes Chemical class 0.000 claims description 10
- 150000001345 alkine derivatives Chemical class 0.000 claims description 10
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 10
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 9
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- 229910052582 BN Inorganic materials 0.000 claims description 7
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 7
- 229910000449 hafnium oxide Inorganic materials 0.000 claims description 7
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims description 7
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- 239000005977 Ethylene Substances 0.000 claims description 6
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 6
- 229910002113 barium titanate Inorganic materials 0.000 claims description 6
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
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- IZSHZLKNFQAAKX-UHFFFAOYSA-N 5-cyclopenta-2,4-dien-1-ylcyclopenta-1,3-diene Chemical group C1=CC=CC1C1C=CC=C1 IZSHZLKNFQAAKX-UHFFFAOYSA-N 0.000 claims description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
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- 238000004062 sedimentation Methods 0.000 description 1
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- 229940100515 sorbitan Drugs 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
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- 238000003892 spreading Methods 0.000 description 1
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- 239000010935 stainless steel Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229940071138 stearyl fumarate Drugs 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
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- 239000011593 sulfur Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052713 technetium Inorganic materials 0.000 description 1
- MVQLEZWPIWKLBY-UHFFFAOYSA-N tert-butyl 2-benzoylbenzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1C(=O)C1=CC=CC=C1 MVQLEZWPIWKLBY-UHFFFAOYSA-N 0.000 description 1
- DPPBKURCPGWRJU-UHFFFAOYSA-N tert-butyl 4-(4-tert-butylperoxycarbonylbenzoyl)benzenecarboperoxoate Chemical compound C1=CC(C(=O)OOC(C)(C)C)=CC=C1C(=O)C1=CC=C(C(=O)OOC(C)(C)C)C=C1 DPPBKURCPGWRJU-UHFFFAOYSA-N 0.000 description 1
- MDDUHVRJJAFRAU-YZNNVMRBSA-N tert-butyl-[(1r,3s,5z)-3-[tert-butyl(dimethyl)silyl]oxy-5-(2-diphenylphosphorylethylidene)-4-methylidenecyclohexyl]oxy-dimethylsilane Chemical compound C1[C@@H](O[Si](C)(C)C(C)(C)C)C[C@H](O[Si](C)(C)C(C)(C)C)C(=C)\C1=C/CP(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 MDDUHVRJJAFRAU-YZNNVMRBSA-N 0.000 description 1
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- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
- AWIJRPNMLHPLNC-UHFFFAOYSA-N thiocarboxylic acid group Chemical group C(=S)O AWIJRPNMLHPLNC-UHFFFAOYSA-N 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229950003937 tolonium Drugs 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- OCANZHUXNZTABW-UHFFFAOYSA-N triethoxy(pent-4-enyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCC=C OCANZHUXNZTABW-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- RMZAYIKUYWXQPB-UHFFFAOYSA-N trioctylphosphane Chemical compound CCCCCCCCP(CCCCCCCC)CCCCCCCC RMZAYIKUYWXQPB-UHFFFAOYSA-N 0.000 description 1
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- JNELGWHKGNBSMD-UHFFFAOYSA-N xanthone powder Natural products C1=CC=C2C(=O)C3=CC=CC=C3OC2=C1 JNELGWHKGNBSMD-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- 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
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
-
- 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
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
-
- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
Definitions
- the present invention relates to an ink composition useful as a sealant for an organic thin film device such as an organic electroluminescent element, preferably an ultraviolet curable resin composition, and an organic thin film device using the cured product. More specifically, an ink composition having a good film forming property, a good storage stability, and a good ink jet ejection stability, a high refractive index, a high transmittance and / or a low outgassing property obtained from the composition.
- the present invention relates to a cured product having an organic electroluminescent element having the cured product.
- the organic electroluminescent element is a self-luminous light emitting element, and is expected as a light emitting element for display or illumination.
- Organic electroluminescent elements made of organic materials have been actively studied because they are easy to save power, be thin, light, large, and flexible.
- the organic electroluminescent element has a structure composed of a pair of electrodes composed of an anode and a cathode, and one or a plurality of layers including an organic compound disposed between the pair of electrodes.
- Organic electroluminescent devices are extremely susceptible to moisture and oxygen, peeling the interface between the metal electrode and the organic layer due to the reaction between the metal electrode and moisture, increasing the resistance due to oxidation of the metal electrode, or Alteration of the contained organic compounds due to oxygen and moisture occurs. Due to these deteriorations, the luminance of the organic electroluminescent element is lowered. In the worst case, the organic electroluminescent element does not emit light and becomes a dark spot.
- a method of covering (surface sealing) the organic electroluminescent device with a sealing material is used.
- a sealing layer can be formed by stacking several layers of organic materials and inorganic materials alternately and thinly on an organic electroluminescent element directly or with a passivation layer (Non-Patent Document 2 or Non-Patent Document 3). ).
- a volatile component contained in the organic material or a decomposition product generated in the process can be generated as outgas.
- the organic material is left between the two layers of inorganic material, so that the outgas generated from the organic material is peeled off from the interface between the layers and the dark spots of the organic electroluminescent device. Cause. Therefore, it is necessary to keep outgas from organic materials as low as possible.
- the laminated film of the inorganic material and the organic material has a different refractive index, and thus the light transmittance may be lowered. This becomes a factor of deteriorating the display performance of the organic EL display panel.
- a cured film having a high refractive index is provided using a thermosetting resin composition containing an inorganic filler, it is expected that the solvent contained degrades the organic electroluminescent element (Patent Document 1).
- Patent Document 2 and Patent Document 3 the use of a composition containing no solvent in the organic electroluminescence device has been proposed (Patent Document 2 and Patent Document 3), but it is not intended to improve the light transmittance.
- the present invention has been made in view of the above situation, for example, an ink composition that can be used as a sealant for an organic thin film device such as an organic electroluminescent element, preferably a solvent-free ultraviolet curable resin composition, and It is an object of the present invention to provide a cured product having a high refractive index, a transmittance and / or a low outgassing property produced using the composition.
- a cured product prepared from the ink composition of the present invention for a sealing film having a laminated structure a sealing film having a high refractive index, a high transmittance and / or a low outgassing property can be prepared.
- an inorganic filler having an average particle diameter of 1 to 20 nm, a compound represented by the following formula (A-1), a (meth) acrylic group or an allyl in the molecule
- A-1 a compound represented by the following formula (A-1)
- a (meth) acrylic group or an allyl in the molecule The inventors have found that the above object can be achieved by an ink composition containing a group-containing compound and a polymerization initiator, and preferably having no solvent, and has completed the present invention.
- Item 1 As the first component, at least one inorganic filler selected from the group consisting of zirconium oxide, titanium oxide, hafnium oxide, barium titanate, boron nitride and cerium oxide having an average particle diameter of 1 to 20 nm;
- As the second component at least one compound represented by the formula (A-1); (However, in the formula (A-1), R is hydrogen or a methyl group; X is —O— or —NH—.
- L is ethyleneoxy (—C 2 H 4 O—), di (ethyleneoxy) (— (C 2 H 4 O) 2 —), tri (ethyleneoxy) (— (C 2 H 4 O) 3 —), Propyleneoxy (—C 3 H 6 O—), di (propyleneoxy) (— (C 3 H 6 O) 2 —) or tri (propyleneoxy) (— (C 3 H 6 O) 3 —),
- E represents an alkyl group having 1 to 4 carbon atoms, a dicyclopentadienyl group, a phenyl group, a phenyl group having an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, or an epoxide having 3 to 7 carbon atoms.
- the third component at least one compound having 2 to 6 (meth) acrylic groups or allyl groups in the molecule;
- the fourth component at least one polymerization initiator having a molecular weight of 250 to 1000,
- a monofunctional (meth) acrylate monomer different from the second component As an optional fifth component, a monofunctional (meth) acrylate monomer different from the second component, And an ink composition having a total weight concentration of the first to fifth components of 98 to 100% by weight based on the total weight of the ink composition.
- Item 2. The ink composition according to Item 1, wherein the first component is zirconium oxide.
- R is hydrogen or a methyl group
- X is —O—
- L is ethyleneoxy (—C 2 H 4 O—), di (ethyleneoxy) (— (C 2 H 4 O) 2 —), propyleneoxy (—C 3 H 6 O—) or di (propyleneoxy) ( -(C 3 H 6 O) 2- )
- E is a methyl group, an ethyl group, a vinyl group or an allyl group, Item 3.
- Item 4. The ink composition according to any one of Items 1 to 3, wherein the second component is 2- (2-vinyloxyethoxy) ethyl (meth) acrylate.
- the third component is (mono, di, tri, tetra or poly) ethylene glycol di (meth) acrylate, (mono, di, tri, tetra or poly) propylene glycol di (meth) acrylate, (mono, di, tri, (Tetra or poly) tetramethylene glycol di (meth) acrylate, di (meth) acrylate of 4 to 24 carbon atoms (alkane, alkene or alkyne), ethylene oxide modified 4 to 24 carbon atoms (alkane, alkene or (Alkyne) diol di (meth) acrylate, propylene oxide modified (alkane, alkene or alkyne) diol di (meth) acrylate, dimethylol tricyclodecane di (meth) acrylate, trimethylolpropane Tori (meta) acryl , Ethylene oxide modified trimethylolpropane tri (meth) acrylate, propylene
- the third component is (mono, di, tri, or tetra) ethylene glycol di (meth) acrylate, (mono, di, or tri) propylene glycol di (meth) acrylate, di (meth) of an alkanediol having 6 to 12 carbon atoms Acrylate, ethylene oxide-modified alkanediol di (meth) acrylate having 6-12 carbon atoms, propylene oxide-modified alkanediol di (meth) acrylate having 6-12 carbon atoms, dimethylol tricyclodecanedi (meth) ) Acrylate, trimethylolpropane tri (meth) acrylate, ethylene oxide modified trimethylolpropane tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate, glycerin tri (meth) acrylate Over bets, and at least one selected from ethylene oxide-modified group consisting dig,
- Item 7 The content of each component is based on the total weight of the first to fifth components.
- the first component is 20.0 to 40.0% by weight
- the second component is 10.0-75.0 wt%
- the third component is 1.0 to 30.0% by weight
- the fourth component is 0.1 to 10.0% by weight
- the optional fifth component is 0 to 50.0% by weight (provided that the total of the first to fifth components is 98 to 100% by weight) Item 7.
- the ink composition according to any one of Items 1 to 6.
- Item 8 The ink composition according to any one of Items 1 to 7, wherein the ink composition has a viscosity of 5 to 45 mPa ⁇ s and a surface tension of 18 to 38 mN / m.
- Item 9 A cured product formed using the ink composition according to any one of items 1 to 8, wherein the refractive index after curing is 1.6 to 1.8.
- Item 10 An organic thin film device having a barrier layer, wherein the barrier layer is a laminate of a layer formed from the following compound group (P-1) and a layer formed from the compound group (P-2) Thin film device.
- Compound group (P-1) At least one compound selected from the group consisting of silicon nitride, silicon nitride oxide, silicon nitride carbide, silicon nitride oxide carbide, and aluminum oxide
- Compound group (P-2) Items 1 to 8 Item 10. A cured product produced using the ink composition according to any one of items 1 to 9, or a cured product according to item 9.
- Item 11 The organic thin film device according to Item 10, which is an organic electroluminescence device.
- Item 12. A method for producing an organic thin film device according to Item 10.
- an ink composition having a good film forming property and a good ejection stability of inkjet, and when the composition is cured, for example, an organic electroluminescent element or the like High refractive index, high transmittance, and / or low outgas cured product that can be used for sealing agents, transparent insulating films or overcoats of organic thin film devices, such as top emission, which has become mainstream in recent years
- the light extraction efficiency which is a problem of the organic electroluminescence device of the type, can be improved.
- Ink composition of the present invention is selected from the group consisting of zirconium oxide, titanium oxide, hafnium oxide, barium titanate, boron nitride and cerium oxide having an average particle diameter of 1 to 20 nm as the first component.
- At least one inorganic filler at least one compound represented by the formula (A-1) as the second component, and at least one compound as the third component, 2 to 6
- an acrylate monomer and the total weight concentration of the first to fifth components is 98 to 100% by weight based on the total weight of the ink composition.
- the total weight concentration of the first to fifth components is preferably 98.5 to 100% by weight, more preferably 99 to 100% by weight, and even more preferably 99.5 to 100% by weight.
- inorganic filler is not particularly limited, but Si, Al, Mg, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As , Se, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Ag, In, Sn, Sb, Te, Cs, Ba, Hf, Ta, W, Re, La, Ce, Pr, Nd, Pm , Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and other oxides, sulfates, carbonates, fluorides and other single salts or double salts (ZrSiO 4 , MgAl 2 O 4, etc.) ).
- the inorganic filler is preferably oxide particles of Group 4 element of the periodic table, and by adding fine particles having a high refractive index, the refractive index of the obtained cured film can be further increased.
- Specific examples thereof include zirconium oxide, titanium oxide, hafnium oxide, barium titanate, boron nitride and cerium oxide, and titanium oxide and zirconium oxide are preferred from the viewpoint of increasing the refractive index of the resulting cured film. Zirconium oxide is more preferable.
- titanium oxide Since titanium oxide has photocatalytic activity, it is preferable to coat the particle surface with silicon oxide or the like for use in optical applications. Titanium oxide has an anatase type and a rutile type depending on the crystal type, but a rutile type is preferred because of its high refractive index and excellent light resistance.
- zirconium oxide contains impurities as hafnium, which has chemically similar characteristics, replaced with zirconium.
- purified hafnium oxide or zirconium oxide may be used, or zirconium oxide containing hafnium as an impurity or hafnium oxide containing zirconium as an impurity may be used.
- the main component of the inorganic filler is zirconium oxide, titanium oxide, hafnium oxide, barium titanate, boron nitride, and cerium oxide, impurities may be included.
- the inorganic filler may be a partially different compound.
- the core portion may be partially exposed from a defect or hole in the shell.
- the primary particle diameter is preferably 20 nm or less from the viewpoint of transparency.
- the primary particle diameter is larger than 20 nm, the haze of the cured film increases (whitens) due to light scattering of the inorganic filler in the cured film.
- the particle size has a distribution, even particles having an average particle size of 20 nm include particles having a large particle size. In view of the haze reduction, the primary particle size is more preferably 18 nm or less in consideration of the particle size distribution.
- an inorganic filler having a primary particle size of less than 1 nm has poor dispersion stability and is difficult to produce.
- the primary particle diameter of the inorganic filler of the cured product is 1 to 20 nm, preferably 1 to 18 nm, more preferably 1 to 15 nm, and further preferably 1 to 13 nm.
- the inorganic filler in the composition is in a state of primary particles in which aggregation is completely loosened, or in a state in which a plurality of primary particles are aggregated.
- the primary particle size of the inorganic filler is the particle size of particles that are not aggregated, and the particle size of the aggregate in which primary particles are aggregated is the aggregated particle size.
- a method of measuring the primary particle diameter of the inorganic filler in the composition a method of directly observing particles with a scanning electron microscope (SEM) or a transmission electron microscope (TEM), or a dynamic light scattering method (DLS) The method of measuring is mentioned.
- the “average particle size” in the present specification means a particle size at an integrated value of 50% in the particle size distribution obtained by the SEM, TEM, or DLS method, and is also expressed as D 50 and median diameter.
- the inorganic filler of the present invention may be subjected to a surface treatment.
- An attractive force due to van der Waals force acts between nano-sized particles present in the liquid phase.
- the primary particle diameter of the inorganic filler is preferably small from the viewpoint of transparency, but the cured film may be whitened due to secondary aggregation. Therefore, it is necessary to give a repulsive force that overcomes the attractive force due to the van der Waals force between the particles to prevent aggregation.
- an inorganic filler having a molecular layer exhibiting an excluded volume effect is, for example, physical / chemical adsorption of molecules having a long chain alkyl, a polyethylene glycol chain, a poly (meth) acrylate chain, a polydimethylsiloxane chain, a long chain perfluoroalkyl, etc. It is produced by coating the surface of inorganic nanoparticles using chemical bonds and / or the like.
- the surface of the inorganic nanoparticle is a carboxylic acid group, a thiocarboxylic acid group, a phosphoric acid group, a phosphoric ester group, a hydroxyl group, a thiol group, a disulfide group, Physical / chemical adsorption and / or chemical bonding is achieved by using functional groups such as a thioether group, an ether group, an amine group, an imine group, an ammonium group, an alkoxysilyl group, and an alkoxytitanium group.
- Some of these adsorb by electrostatic interaction with bond defects (duggling bonds) and surface atom orbits on the surface of inorganic nanoparticles, while others form chemical bonds.
- the functional group can cover the surface more firmly. Some of them adsorb / bond to the surface at one point, while others adsorb / bond to the surface at multiple points.
- the surface can be coated more firmly by adsorbing / bonding to the surface at multiple points.
- a low molecular or high molecular dispersion having a hydroxyl group, a thiol group, a carboxylic acid group, a phosphoric acid group, a phosphoric acid ester group, a phosphine oxide, an amine group, and an imine group is used to stabilize the inorganic filler against aggregation. It is preferable to use an agent and an alkoxysilane-based dispersant. More specifically, examples of the low molecular weight dispersant include heptanol, hexanol, octanol, benzyl alcohol, phenol, ethanol, propanol, butanol, oleyl alcohol, and dodecyl alcohol.
- Octadecanol triethylene glycol, octanethiol, dodecanethiol, octadodecanethiol, monomethyl ether octanoic acid, acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, Phosphoric acid, myristic acid, palmitic acid, stearic acid, 2- [2- (2-methoxyethoxy) ethoxy] acetic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, benzoic acid, octyl succinate, decyl succinate, Dodecyl succinate, tetradecane succinate, hexadecane succinate, stearyl succinate, oleyl succinate, octyl maleate, dec
- Polymeric dispersants include polysaccharide derivatives, acrylic copolymers, butyral resins, vinyl acetate copolymers, and hydroxyl groups Examples thereof include carboxylic acid esters, salts of high molecular weight polycarboxylic acids, alkyl polyamines and polyhydric alcohol esters.
- alkoxysilane dispersants include n-propyltrimethoxysilane, n-propyl.
- the inorganic filler 2- [2- (2-methoxyethoxy) ethoxy] acetic acid, 2- [methoxy (polyethyleneoxy), adsorbed at one point and having a (poly) ethylene glycol chain Propyl] -trimethoxysilane and methoxytri (ethyleneoxy) propyltrimethoxysilane, monoalkyl monocarboxylate and polymer, and acrylic copolymer which is a polymer dispersant having a hydroxyl group and / or a carboxylic acid group And hydroxyl group-containing carboxylic acid esters are preferred.
- the dispersant used for coating the inorganic filler is compatible with other components, the compound represented by the formula (A-1) as the second component and 2 to 6 in the molecule as the third component Care should be taken in selecting additives that are compounds having other (meth) acrylic or allyl groups or other components.
- the dispersant when an alkoxysilane-based dispersant having a (poly) ethylene glycol chain or a polymer dispersant having a hydroxyl group or / and a carboxylic acid group is used, the dispersant is polar and has a strong hydrophobic property.
- a (meth) acrylate monomer or an additive having a reverse charge is used, the characteristics may be deteriorated.
- the dispersant that is used may be specified and appropriate second component, third component, and other components may be selected.
- the refractive index of the inorganic filler (refractive index nD as a bulk material rather than nanoparticles) is 1.6 to 3.5, preferably 1.8 to 3.0, more preferably 2.0 to 2. .8.
- the inorganic filler may be in the form of powder or dispersed in a reactive monomer.
- the dispersion medium include (meth) acrylate monomers, (meth) acrylate oligomers, epoxy monomers, oxetane monomers, acid anhydrides, and amine compounds.
- Examples of powdered commercial products that can be used as the inorganic filler include TECNAPOW-CEO2, TECNAPOW-TIO2, and TECNAPOW-ZRO2 manufactured by TECNAN.
- Examples of commercially available monomer dispersions that can be used as inorganic fillers include, for example, zirconia / acrylate monomer dispersion # 1976, MHI filler # FM-089M, MHI filler # FM-135M, B943M, etc. Pixellient's The Clear Solution PCPN-80-BMT.
- the refractive index is 1.65.
- the above cured product is obtained, and when it is 35% by weight or more, a cured product having a refractive index of 1.7 or more is obtained.
- an upper limit of 30 mPa ⁇ s which is a preferable viscosity for ink jet printing, is obtained, and when the content is 20% by weight or more, the ink jet is obtained.
- the content of the inorganic filler is preferably 20.0 to 40.0% by weight with respect to the solid component in the ink composition. More precisely, the content of the inorganic filler is determined by the refractive index of the inorganic material layer of the sealing film having an organic material-inorganic material laminated structure. When the refractive index of the inorganic material layer is 1.65, it is more preferably 20.0 to 40.0% by weight with respect to the solid component in the ink composition. When the refractive index of the inorganic material layer is 1.70, it is more preferably 35.0 to 40.0% by weight with respect to the solid component in the ink composition.
- Second Component Compound Represented by Formula (A-1)
- the compound represented by formula (A-1) used as the second component in the present invention is a compound having the following structure, and an ink composition It has the role of increasing the dispersibility of the inorganic filler in the product and diluting the composition.
- R is hydrogen or a methyl group
- X is —O— or —NH—, preferably —O—.
- L is ethyleneoxy (—C 2 H 4 O—), di (ethyleneoxy) (— (C 2 H 4 O) 2 —), tri (ethyleneoxy) (— (C 2 H 4 O) 3 —), Propyleneoxy (—C 3 H 6 O—), di (propyleneoxy) (— (C 3 H 6 O) 2 —) or tri (propyleneoxy) (— (C 3 H 6 O) 3 —),
- E represents an alkyl group having 1 to 4 carbon atoms, a dicyclopentadienyl group, a phenyl group, a phenyl group having an alkyl group having 1 to 4 carbon atoms, a dicyclopentadienyl group, a phenyl group, a phenyl group having an alkyl group having 1 to 4 carbon atoms, a dicyclopentadienyl group,
- an alkyl group having 4 to 8 carbon atoms having oxetane an alkyl group having 1 to 4 carbon atoms having maleimide, or an alkyl group having 1 to 4 carbon atoms having a lactone ring having 2 to 4 carbon atoms.
- E represents an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group and a t-butyl group, and a methyl group or an ethyl group is preferable.
- This description is based on a phenyl group having an alkyl group having 1 to 4 carbon atoms, an alkyl group having 4 to 8 carbon atoms having oxetane, an alkyl group having 1 to 4 carbon atoms having maleimide, or a lactone ring having 2 to 4 carbon atoms.
- lactone ring (cyclic ester) having 2 to 4 carbon atoms
- lactone ring having 2 to 4 carbon atoms
- examples of the lactone ring (cyclic ester) having 2 to 4 carbon atoms include ⁇ -acetolactone, ⁇ -propiolactone, and ⁇ -butyrolactone.
- alkenyl group having 2 to 4 carbon atoms an alkenyl group having 2 to 3 carbon atoms is particularly preferable, and a vinyl group and an allyl group are particularly preferable.
- the epoxide group having 3 to 7 carbon atoms is preferably an epoxide group having 3 to 6 carbon atoms, more preferably an epoxide group having 3 to 5 carbon atoms, and particularly preferably an epoxide group having 3 or 4 carbon atoms.
- ethoxy-diethylene glycol acrylate manufactured by Kyoeisha Chemical Co., Ltd., light acrylate EC-A
- 2- (2-vinyloxyethoxy) ethyl acrylate manufactured by Nippon Shokubai Co., Ltd., VEEA
- methacrylic acid 2- (2-vinyloxyethoxy) ethyl Nippon Shokubai, VEEM
- the compound represented by the formula (A-1) has a role of enhancing the dispersibility of the inorganic filler in the ink composition and diluting the composition.
- L and E are preferably longer chains.
- L and E are preferably shorter chains because of low viscosity, and X is preferably —O— because of low viscosity.
- L and E are preferably short chains, and L preferably has an ethyleneoxy skeleton.
- L is preferably a longer chain, and E is preferably reactive.
- E is preferably a vinyl group or an allyl group.
- R is preferably hydrogen from the viewpoint of the reaction rate during photocuring, but R is preferably a methyl group from the viewpoint of low irritation during handling.
- L preferably has a propyleneoxy skeleton.
- the molecule has a functional group that can be cured by ultraviolet rays in addition to the (meth) acrylic group.
- a functional group that can be cured by ultraviolet rays in addition to the (meth) acrylic group.
- 2- (2-vinyloxyethoxy) ethyl acrylate, 2- (2 -Vinyloxyethoxy) ethyl is more preferred.
- the content of the compound represented by the formula (A-1) is 10.0 to 75.0% by weight with respect to the first to fifth components (hereinafter also referred to as solid components) in the ink composition. It is preferable. From the viewpoint of dispersibility and dilutability of the filler, the content of the compound represented by the formula (A-1) is more preferably 20.0 to 75.0% by weight, and more preferably 25.0 to 60.0% by weight. Further preferred. When it is in this concentration range, preferable low viscosity and dispersion stability can be obtained. Further, from the viewpoint of low viscosity and low outgassing properties, it is preferable to reduce the fifth component described later and increase the second component. In this case, the second component is more preferably 30.0 to 75.0% by weight, and further preferably 40.0 to 75.0% by weight.
- Third component Compound having 2 to 6 (meth) acrylic groups or allyl groups
- the molecule used as the third component has 2 to 6 (meth) acrylic groups or allyl groups.
- the compound means an acrylate monomer, a methacrylate monomer or an allyl monomer (such as an allyl ether monomer or an allyl ester monomer), and the number of acrylic groups, methacrylic groups or allyl groups is 2 to 6 per molecule.
- the compound further has at least one alkyl group, alkenyl group, ether group and aryl group.
- (Meth) acrylate monomer or allyl monomer (allyl ether monomer and allyl ester monomer, etc.) having 2 to 6 (meth) acrylic groups or allyl groups in the molecule, used as the third component in the present invention ) Is a highly curable crosslinking agent. Since the monofunctional monomer produces only a linear polymer, the cured film tends to be soft and brittle even if it is used. Therefore, it is preferable to add a crosslinking agent in order to increase the mechanical strength of the cured film. In general, a larger amount of (meth) acrylic group or allyl group shows faster curability and a hard film tends to be obtained, but curing shrinkage may be large.
- the number of (meth) acrylic groups and allyl groups is preferably 2 to 5, more preferably 2 to 4.
- the third component is preferably a smaller molecule.
- the number of (meth) acrylic groups in the molecule is small, it is preferable to have a methacrylic group rather than an acrylic group, and an allyl group and a vinyl group than the (meth) acrylic group. It is preferable to have a group.
- (meth) acrylate monomers or allyl monomers (allyl ether monomers and allyl esters having 2 to 6 (meth) acryl groups or allyl groups in the molecule, used as the third component of the present invention)
- the molecular weight of the monomer and the like is preferably 200 to 1000. Further, a molecular weight of 200 to 600 is more preferable from the viewpoint of refractive index.
- Examples of the third component include (mono, di, tri, tetra, or poly) ethylene glycol di (meth) acrylate, (mono, di, tri, tetra, or poly) propylene glycol di (meth) acrylate, (mono, di) , Tri, tetra or poly) tetramethylene glycol di (meth) acrylate, di (meth) acrylate of 4-24 carbon (alkane, alkene or alkyne) diol, ethylene oxide modified 4-24 carbon (alkane) , Alkene or alkyne) diol di (meth) acrylate, propylene oxide modified (alkane, alkene or alkyne) diol di (meth) acrylate, dimethylol tricyclodecane di (meth) acrylate, Trimethylolpropane tri ( ) Acrylate, ethylene oxide modified trimethylolpropane tri (meth) acrylate, propylene oxide modified
- the carbon number of the above (alkane, alkene or alkyne) diol is 4 to 24, preferably 4 to 20, more preferably 4 to 16, and further preferably 6 to 12.
- bifunctional (meth) acrylate monomers include 1,4-butanediol dimethacrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1 Diesters of alkyl dialcohols having 1 to 12 carbon atoms such as 1,4-cyclohexanedimethanol di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate and 1,12-dodecanediol di (meth) acrylate, bisphenol F Ethylene oxide modified di (meth) acrylate, bisphenol A ethylene oxide modified di (meth) acrylate, isocyanuric acid ethylene oxide modified di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di ( Acrylate), pentaerythritol di (meth) acrylate, pentaerythri
- trifunctional or higher polyfunctional (meth) acrylate monomers and allyl monomers trimethylolpropane tri (meth) acrylate, ethylene oxide modified trimethylolpropane tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) Acrylate, epichlorohydrin modified trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, glycerol tri (meth) acrylate, epichlorohydrin modified glycerol tri (meth) acrylate, diglycerin tetra (meth) acrylate, ethylene oxide modified di Glycerin tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (me ) Acrylate, dipentaerythritol penta (meth) acryl
- the content of the third component is preferably 1.0 to 30.0% by weight with respect to the first to fifth components (hereinafter also referred to as solid components) in the ink composition.
- the refractive index and flatness of the cured film formed from the ink composition of the present invention are good.
- it is more preferably 3.0 to 28.0% by weight, still more preferably 5.0 to 25.0% by weight. It is particularly preferably 5.0 to 20.0% by weight.
- the polymerization initiator is for curing the above-mentioned (meth) acrylate monomer or allyl monomer, and for example, a photo radical generator is preferably used.
- the photo radical generator is not particularly limited as long as it is a compound that generates a radical or an acid upon irradiation with ultraviolet rays or visible light.
- the acyl phosphine oxide initiator, the oxyphenyl acetate ester initiator, the benzoylformate initiator, and Hydroxyphenyl ketone-based initiators are preferable, and among these, hydroxyphenyl ketone-based initiators are particularly preferable from the viewpoints of photocurability of the ink composition and light transmittance of a cured film to be obtained.
- the photo radical generator include Michler's ketone, 4,4′-bis (diethylamino) benzophenone, isopropyl xanthone, 2,4-diethylthioxanthone, isopropyl benzoin ether, isobutyl benzoin ether, 2,2-dimethoxy-2-phenyl Acetophenone, 4,4′-di (t-butylperoxycarbonyl) benzophenone, 3,4,4′-tri (t-butylperoxycarbonyl) benzophenone, 3,3 ′, 4,4′-tetra (t-butylperoxy) Carbonyl) benzophenone, 3,3 ′, 4,4′-tetra (t-hexylperoxycarbonyl) benzophenone, 3,3′-di (methoxycarbonyl) -4,4′-di (t-butylperoxycarbonyl) benzophenone, 3,4'-di (me Xycarbonyl)
- Irgacure 651, Irgacure 127, Irgacure 907, Irgacure OXE01, Irgacure OXE02 (manufactured by BASF), NCI-831, NCI-930 (manufactured by ADEKA) and the like are preferable.
- the polymerization initiator used in the composition of the present invention may be a single compound or a mixture of two or more compounds.
- the content of the polymerization initiator is low, a polymer having a high molecular weight is obtained, so that the curability is high inside the cured product.
- the surface of the cured product is deactivated due to oxygen, moisture, etc. The curability of is low.
- the content of the polymerization initiator is large, the polymer does not have a high molecular weight and the curability inside the cured product is low, but the surface curability is high because more active species are generated on the surface.
- the content of the polymerization initiator is small because the outgas derived from the polymerization initiator itself can be reduced.
- the content of the polymerization initiator is preferably 0.1 to 10.0% by weight with respect to the first to fifth components (hereinafter also referred to as solid components) in the ink composition. From the viewpoint of curability, yellowing of the cured product and scattering of the initiator decomposition product, it is more preferably 0.2 to 5.0% by weight, still more preferably 0.5 to 3.0% by weight.
- a polymer type photoradical polymer having a high molecular weight is suitable. After radical polymerization is initiated by irradiating light to a normal photoradical generator, the residue may become outgas and deteriorate the device. However, it has been found that outgassing can be suppressed by using a polymer-type photoradical polymer. Examples of commercially available polymer type photoradical polymers include KIP-150, KIP EM (Lamberti), and the like.
- the molecular weight of the polymerization initiator is 250 to 1000, preferably 250 to 800, more preferably 250 to 700, still more preferably 250 to 600, particularly preferably 280 to 550, and most preferably 300 to 500.
- the initiator, particularly the photoradical generator is preferably a compound that does not volatilize before and after the photoreaction, and specifically, a compound having a molecular weight of 250 or more is preferred from the viewpoint of low outgassing properties.
- the photo radical generator having a large molecular weight is often yellow or red, and a compound having a molecular weight of 1000 or less is preferable from the viewpoint of transparency.
- Monofunctional (meth) acrylate monomer is a monofunctional (meth) acrylate monomer with high dilutability.
- the inorganic filler which is the first component is coated with a dispersant, and the concentration of the inorganic filler is high, the dispersant of the adjacent inorganic filler becomes entangled, resulting in a high viscosity. Therefore, it is necessary to adjust to a low viscosity suitable for the printing method. Conventionally, the viscosity could be greatly reduced by adding a solvent.
- the amount of solvent is suppressed to a very low level, or preferably no solvent, so that the volatile component is greatly reduced by a compound that is difficult to volatilize or by curing. It is preferable to select a compound that can be reduced to a low level.
- the monofunctional (meth) acrylate monomer as the fifth component a monomer different from the compound represented by the formula (A-1) of the second component is selected.
- the monofunctional (meth) acrylate monomer has low viscosity, low entanglement and interaction with the dispersant, high dilutability, low volatility at normal temperature and pressure, and high curability. Is desirable.
- the molecular weight of the monofunctional (meth) acrylate monomer is preferably 100 to 300, more preferably 150 to 250.
- the viscosity is preferably 1 to 25 mPa ⁇ s, more preferably 1 to 20 mPa ⁇ s.
- the composition contains a large amount of (meth) acrylate monomers having a plurality of reactive groups in the molecule, and the inclusion of a monofunctional (meth) acrylate monomer as the fifth component A smaller amount is preferred. Furthermore, since the higher reactivity of the reactive group is less likely to remain unreacted after photocuring and low outgassing properties are obtained, a (meth) acrylate monomer having a plurality of (meth) acryl groups in the molecule Is preferably contained in the composition, and the content of the monofunctional (meth) acrylate monomer as the fifth component is preferably small.
- the content of the monofunctional (meth) acrylate monomer is preferably 0 to 50.0% by weight, preferably 0 to 46, based on the first to fifth components (hereinafter also referred to as solid components) in the ink composition.
- 0.0 wt% is more preferable, 0 to 40.0 wt% is further preferable, and 0 to 36.0 wt% is particularly preferable.
- monofunctional (meth) acrylate monomers include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, and t-butyl (meth).
- tetrahydrofurfuryl (meth) acrylate methyl 2- (allyloxymethyl) (meth) acrylate, isobornyl (meth) Acrylate, lauryl (meth) acrylate, cyclohexyl (meth) acrylate and 3,3,5-trimethylcyclohexanol (meth) acrylate are preferred, tetrahydrofurfuryl (meth) acrylate and 2- (allyloxymethyl) (meth) acrylic acid Methyl is more preferred.
- a photosensitizer can be added to the ink composition of the present invention in order to promote decomposition of the polymerization initiator by irradiation with active energy rays.
- the photosensitizer is preferably used in an amount of 0.1 to 10% by weight based on the total weight of the polymerization initiator.
- a compound corresponding to the wavelength of the active energy ray that generates an initiation species in the polymerization initiator used in the ink composition may be used, but it is used for a curing reaction of a general ink composition.
- examples of preferable photosensitizers include those having an absorption wavelength in the 350 nm to 450 nm region.
- polycyclic aromatic compounds such as anthracene, pyrene, perylene and triphenylene
- thioxanthones such as isopropylthioxanthone, fluorescein, eosin, erythrosin, rhodamine B and rosebengalxanthenes
- thiacarbocyanine and oxacarbocyanine Cyanines such as merocyanines such as merocyanine and carbomerocyanine, thionine, methylene blue and toluidine blue thiazines, acridines such as acridine orange, chloroflavin and acriflavine, anthraquinones such as anthraquinone, squaliums such as squalium, 7 -Coumarins such as diethylamino-4-methylcoumarin and the like, and polycyclic aromatic compounds and thioxanthones are preferred. Arbitrariness.
- a surfactant can be added to the ink composition of the present invention.
- the composition contains a surfactant, it is possible to obtain a composition with improved wettability, leveling property, and coating property to the base substrate.
- the surfactant is preferably used in an amount of 0.01 to 1% by weight based on the total weight of the composition. Only one surfactant may be used, or two or more surfactants may be mixed and used.
- the surfactant for example, from the viewpoint of improving the applicability of the composition, for example, Polyflow No. 45, Polyflow KL-245, Polyflow No. 75, Polyflow No. 90, polyflow no. 95 (all are trade names, manufactured by Kyoeisha Chemical Industry Co., Ltd.), Disperbak 161, Disperse Bake 162, Disperse Bake 163, Disperse Bake 164, Disperse Bake 166, Disperse Bake 170, Disperse Bake 180, Disperse Bake 181, Disper Bake 182, BYK300, BYK306, BYK310, BYK320, BYK330, BYK335, BYK341, BYK344, BYK346, BYK354, BYK358, BYK361 (all of these are trade names, manufactured by Big Chemie Japan Co., Ltd., K 41, P) -358, KP-368, KF-96-50CS, KF-50-100CS (all are trade names, manufactured by Shin-Etsu Chemical Co.,
- the surfactant has one photoreactive functional group from the viewpoint of low volatility.
- the photoreactive functional group is preferably (meth) acryloyl, epoxy, or oxetanyl because it has higher photocurability.
- Specific examples of the surfactant having (meth) acryl as a photocurable functional group include RS-72K (trade name; manufactured by DIC Corporation), BYK UV 3500, BYK UV 3510, BYK UV 3570 (all of these are above) Trade name, manufactured by Big Chemie Japan Co., Ltd.), TEGO RAD 2220N, TEGO RAD 2250, TEGO RAD 3500, TEGO RAD 3570 (all of which are trade names, manufactured by DEGUSSA).
- Examples of the surfactant having an epoxy as a photocurable functional group include RS-211K (trade name) manufactured by DIC Corporation.
- the surfactant used in the ink composition of the present invention may be a single compound or a mixture of two or more compounds.
- the ink composition of the present invention may contain an additive depending on the intended characteristics.
- the additive include monomers / polymers other than the second component and the third component, an antistatic agent, a coupling agent, an antioxidant, a pH adjusting agent, an anti-reducing agent, and the like.
- ⁇ Monomer / polymer other than second component, third component and fifth component> For example, styrene, methylstyrene, chloromethylstyrene, N-cyclohexylmaleimide, N-phenylmaleimide, vinyltoluene, crotonic acid, ⁇ -chloroacrylic acid, cinnamic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, mesacone An acid, a polystyrene macromonomer, a polymethylmethacrylate macromonomer, etc. are mentioned.
- the antistatic agent can be used to prevent the composition from being charged, and is preferably used in an amount of 0 to 20% by weight in the composition.
- a known antistatic agent can be used as the antistatic agent. Specific examples include tin oxide, metal oxides such as tin oxide / antimony oxide composite oxide, tin oxide / indium oxide composite oxide, and quaternary ammonium salts. Only one type of antistatic agent may be used, or a mixture of two or more types may be used.
- the coupling agent is not particularly limited, and a known coupling agent such as a silane coupling agent can be used for the purpose of improving adhesion to glass or ITO.
- the silane coupling agent mainly serves as an adhesion aid for favorably bonding the organic electroluminescent element sealing agent of the present invention to the organic EL panel and the protective substrate.
- the coupling agent is preferably added and used so that the solid content of the composition (residue obtained by removing the solvent from the composition) is 100 parts by weight.
- a coupling agent may use only 1 type and may mix and use 2 or more types.
- silane coupling agent examples include trialkoxysilane compounds and dialkoxysilane compounds.
- ⁇ -vinylpropyltrimethoxysilane, ⁇ -acryloylpropyltrimethoxysilane, ⁇ -methacryloylpropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -isocyanatopropyltriethoxysilane and the like are particularly preferable.
- a polycondensation product of these compounds may be used. Specifically, Coatosil MP200 (made by MOMENTIVE) etc. are mentioned.
- the amount of the silane coupling agent is not particularly limited, but a preferable lower limit is 0.1 parts by weight and a preferable upper limit is 10 parts by weight with respect to 100 parts by weight of the (meth) acrylate monomer. If the amount of the silane coupling agent is less than 0.1 parts by weight, the effect of adding the silane coupling agent may be hardly obtained. If the amount exceeds 10 parts by weight, the excess of the silane coupling agent Since the alkoxy group is decomposed to generate alcohol, the organic electroluminescent device may be deteriorated.
- a more preferred lower limit of the amount of the silane coupling agent is 0.5 parts by weight, and a more preferred upper limit is 5 parts by weight.
- the composition contains an antioxidant, it is possible to suppress or prevent deterioration when the cured film obtained from the composition is exposed to high temperature or light.
- the antioxidant is preferably used in an amount of 0 to 3 parts by weight based on 100 parts by weight of the solid content of the composition excluding the antioxidant (residue obtained by removing the solvent from the composition). Only 1 type may be used for antioxidant and 2 or more types may be mixed and used for it.
- antioxidant examples include hindered amine compounds and hindered phenol compounds.
- IRGAFOS XP40, IRGAFOS XP60, IRGANOX 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1135, IRGANOX 1520L (above trade names, manufactured by BASF) and the like can be mentioned.
- the water content of the ink composition is preferably 0.1% by weight or less and more preferably 0.06% by weight or less when the composition is 100% by weight. . Since an electric circuit in which an optical semiconductor such as an organic electroluminescent element is disposed is easily deteriorated by moisture, it is preferable to reduce the water content in the composition as much as possible.
- the water content in the composition can be obtained by weighing about 0.1 g of a sample sample, heating to 150 ° C. using a Karl Fischer moisture meter, and measuring the amount of water generated at that time (solid vaporization). Law).
- the ink composition of the present invention is used as an ink-jet ink
- various parameters such as viscosity, surface tension, and boiling point of the solvent can be optimized for ink-jet printing, and good ink-jet printability (for example, Drawability).
- the viscosity at the temperature (ejection temperature) when the ink composition is ejected from the inkjet head is usually 1 to 50 mPa ⁇ s, preferably 5 to 25 mPa ⁇ s, more preferably 8 to 15 mPa ⁇ s.
- the viscosity is in the above range, jetting accuracy by the ink jet coating method is improved.
- the viscosity is less than 15 mPa ⁇ s, it is preferable from the viewpoint of ink jet discharge property.
- the viscosity of the ink composition of the present invention at 25 ° C. is usually 1 to 50 mPa ⁇ s, preferably 5 to 45 mPa ⁇ s, more preferably 5 to 40 mPa ⁇ s. s, more preferably 5 to 35 mPa ⁇ s, particularly preferably 5 to 30 mPa ⁇ s.
- the viscosity at 25 ° C. is smaller than 30 mPa ⁇ s, it is preferable from the viewpoint of ink jet discharge property.
- the surface tension of the ink composition of the present invention at 25 ° C. is 15 to 40 mN / m, preferably 18 to 38 mN / m, more preferably 18 to 36 mN / m, and further preferably 18 to 35 mN / m.
- good droplets can be formed by jetting and a meniscus can be formed.
- the coating method of the ink composition of the present invention includes a step of coating the above-described inkjet ink by an inkjet coating method to form a coating film, and a step of curing the coating film.
- the ink composition of the present invention can be ejected by various methods by appropriately selecting the contained components. According to the ink jet coating method, the ink composition of the present invention is applied in a predetermined pattern. can do.
- the ink composition of the present invention When the ink composition of the present invention is applied by an inkjet application method, there are various types of methods depending on the ink ejection method.
- the discharge method include a piezoelectric element type, a bubble jet (registered trademark) type, a continuous injection type, and an electrostatic induction type.
- a preferred ejection method when applying using the ink composition of the present invention is a piezoelectric element type.
- the piezoelectric element-type head includes a nozzle forming substrate having a plurality of nozzles, a pressure generating element made of a piezoelectric material and a conductive material disposed opposite to the nozzles, and ink filling the periphery of the pressure generating element.
- An on-demand ink jet coating head displaces a pressure generating element by an applied voltage and ejects a small droplet of ink from a nozzle.
- the inkjet coating apparatus is not limited to a configuration in which the coating head and the ink storage unit are separated, and may be configured such that they are integrated so as not to be separated.
- the ink container is integrated with the coating head in a separable or non-separable manner and mounted on the carriage, and is provided at a fixed portion of the apparatus via an ink supply member such as a tube. It may be in the form of supplying ink to the coating head.
- the ink tank is provided with a configuration for applying a preferable negative pressure to the coating head, a configuration in which an absorber is disposed in the ink storage portion of the ink tank, or a flexible ink storage bag and this
- the coating apparatus may take the form of a line printer in which coating elements are aligned over a range corresponding to the entire width of the coating medium.
- the cured product formed using ink composition uses the ink composition of the present invention as, for example, an inkjet ink and is applied by an inkjet coating method. And a step of curing the coating film.
- the amount of light irradiated when the ink composition of the present invention is irradiated with ultraviolet rays or visible light depends on the composition ratio in the ink composition of the present invention, but is received by Ushio Electric Co., Ltd. as measured with integrating actinometer UIT-201 fitted with a vessel UVD-365PD, preferably 100 ⁇ 5,000mJ / cm 2, more preferably 300 ⁇ 4,000mJ / cm 2, the 500 ⁇ 3,000mJ / cm 2 Further preferred.
- the wavelength of ultraviolet rays or visible rays to be irradiated is preferably 200 to 500 nm, and more preferably 250 to 450 nm.
- the exposure amount described below is a value measured by an integrating light meter UIT-201 equipped with a photoreceiver UVD-365PD manufactured by USHIO INC.
- an electrodeless lamp, a low-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, a halogen lamp, an LED light source, etc. are mounted, and ultraviolet rays, visible light, etc. are in the range of 200 to 500 nm. If it is an apparatus to irradiate, it will not specifically limit.
- a patterned cured film (patterned cured film) is formed.
- the cured film includes a patterned cured film.
- the total light transmittance of the cured product of the ink composition is preferably 80% or more, more preferably 85% or more, and further preferably 90% or more. If the total light transmittance of the cured product is too low, when used as a sealing agent for an organic electroluminescent device or the like, the light extraction efficiency from the device is likely to be lowered, and the design is also deteriorated. Generally, the upper limit of the total light transmittance of the cured product of the sealant can be about 99%.
- the refractive index of the cured product of the ink composition is preferably 1.6 to 1.8, more preferably 1.6 to 1.75.
- the substrate with a cured film of the present invention has a film substrate or a silicon wafer substrate, and a cured film or a patterned cured film formed on the substrate by the above-described method for forming a cured film.
- the ink composition of the present invention is applied on a substrate such as a polyimide film, a glass substrate, a metal foil, or a silicon wafer substrate on which a thin film having an optical function or an organic thin film device is formed, by an inkjet coating method, and then As described above, it is obtained by performing UV treatment to form a cured film.
- the cured film of the present invention is preferably formed on a substrate such as a polyimide film, a glass substrate, a metal foil or a silicon wafer substrate on which a thin film having an optical function or an organic thin film device described above is formed.
- a substrate such as a polyimide film, a glass substrate, a metal foil or a silicon wafer substrate on which a thin film having an optical function or an organic thin film device described above is formed.
- a substrate such as a polyimide film, a glass substrate, a metal foil or a silicon wafer substrate on which a thin film having an optical function or an organic thin film device described above is formed.
- a substrate such as a polyimide film, a glass substrate, a metal foil or a silicon wafer substrate on which a thin film having an optical function or an organic thin film device described above is formed.
- it is not limited to these and can be formed on a known substrate.
- a substrate made of a metal such as copper, brass, phosphor bronze, beryllium copper, aluminum, gold, silver, nickel, tin, chromium, or stainless steel May be a substrate; aluminum oxide (alumina), aluminum nitride, zirconium oxide (zirconia), zirconium silicate (zircon), magnesium oxide (magnesia), aluminum titanate, barium titanate, lead titanate ( PT), lead zirconate titanate (PZT), lead lanthanum zirconate titanate (PLZT), lithium niobate, lithium tantalate, cadmium sulfide, molybdenum sulfide, beryllium oxide (beryllia), silicon oxide (silica), silicon carbide (Silicon carbide), silicon nitride (silicon A substrate made of ceramics such as zinc oxide, boron nitride (boron
- Organic thin film device is an organic thin film device which has the above-mentioned cured film or a board
- a flexible organic thin film device can be obtained by using the cured film or the substrate with the cured film of the present invention. Further, the cured film of the present invention can be applied to a silicon wafer substrate.
- FIG. 1 is a schematic cross-sectional view showing an organic electroluminescent element according to this embodiment.
- 2 and 3 are schematic cross-sectional views showing an organic electroluminescent element having a sealing structure according to this embodiment.
- An organic electroluminescent device 100 shown in FIG. 1 includes a substrate 101, a bank 110 provided on the substrate 101, an anode 102 provided on the substrate 101, and a hole injection provided on the anode 102.
- the organic electroluminescent element 100 is provided on the substrate 101, the bank 110 provided on the substrate 101, the cathode 108 provided on the substrate 101, and the cathode 108, for example, by reversing the manufacturing order.
- the electron injection layer 107, the electron transport layer 106 provided on the electron injection layer 107, the light emitting layer 105 provided on the electron transport layer 106, and the holes provided on the light emitting layer 105 A transport layer 104; a hole injection layer 103 provided on the hole transport layer 104; an anode 102 provided on the hole injection layer 103; and a capping layer 109 provided on the anode 102. It is good also as a structure to have.
- the organic electroluminescent device 200 having the sealing structure shown in FIG. 3 includes a barrier layer 111 having a structure in which a passivation layer 121 and a buffer layer 122 are repeatedly stacked on the organic electroluminescent device 100, and a barrier layer 111. And a barrier film 113 having an adhesive layer 112 provided so as to cover it. 2 and 3, the passivation layer 121 and the buffer layer 122 constituting the barrier layer 111 may be at least one pair, usually 1 to 20 pairs, and the outermost side of the barrier layer 111 may not be a pair. .
- the order of forming the passivation layer 121 and the buffer layer 122 constituting the barrier layer 111 on the organic electroluminescent element 100 may be any first.
- 2 may include a member made of a color filter, a circularly polarizing plate, a touch panel, or the like on the barrier layer 111 and in FIG. 3 on the barrier film 113. Note that these members may include an adhesive layer and a barrier layer.
- An inorganic material is used for the passivation layer 121, and high gas barrier performance is exhibited if a dense film is formed. However, it is difficult to form a film without a pinhole, and the gas barrier property is lowered due to the pinhole. Therefore, by pinching the buffer layer 122 between the passivation layers 121, the pinholes are prevented from penetrating the passivation layer 121 and the pinholes are filled. Further, flexibility can be imparted to the laminated barrier layer 111 by sandwiching the flexible buffer layer 122 between the hard passivation layers 121.
- the cured product formed from the ink composition of the present invention is used for the buffer layer 122 in FIGS.
- the organic electroluminescent device 400 having the sealing structure shown in FIG. 4 has a barrier layer 130 having a single configuration on the organic electroluminescent device 100.
- the organic electroluminescent element 400 having the sealing structure of FIG. 4 is the most ideal configuration, and the barrier layer 130 has a single high gas barrier function, high optical characteristics, and film properties.
- a member made of a color filter, a circularly polarizing plate, a touch panel, or the like may be further included on the barrier layer 130. Note that these members may include an adhesive layer.
- the cured product formed from the ink composition of the present invention can be used for the barrier layer 130 in FIG.
- an edge seal may be applied to block gas such as water vapor entering from the lateral direction of the devices stacked as described above.
- the edge seal is formed of an existing material, for example, a glass frit, a photocurable resin, an adhesive seal, or the like.
- the minimum constitutional unit is a configuration of an organic electroluminescent element 100 composed of an anode 102, a light emitting layer 105, and a cathode 108 and a cured film as a barrier layer 130 covering the organic electroluminescent element 100.
- the hole injection layer 103, the hole transport layer 104, the electron transport layer 106, the electron injection layer 107, the capping layer 109, the passivation layer 121, the buffer layer 122, the bank 110, and the edge seal are arbitrarily provided.
- each said layer may consist of a single layer, respectively, and may consist of multiple layers.
- the substrate 101 serves as a support for the organic electroluminescent device 100, and usually quartz, glass, metal, plastic, or the like is used.
- the substrate 101 is formed into a plate shape, a film shape, or a sheet shape according to the purpose.
- a glass plate, a metal plate, a metal foil, a plastic film, a plastic sheet, or the like is used.
- glass plates and transparent synthetic resin plates such as polyester, polymethacrylate, polycarbonate, polyimide, polysulfone, and the like are preferable.
- soda lime glass, non-alkali glass, or the like is used, and the thickness only needs to be sufficient to maintain the mechanical strength.
- the upper limit value of the thickness is, for example, 2 mm or less, preferably 1 mm or less.
- the glass material is preferably alkali-free glass because it is better to have less ions eluted from the glass.
- soda lime glass with a barrier coat such as SiO 2 is also commercially available, so it can be used. it can.
- the substrate 101 may be provided with a gas barrier film such as a dense silicon oxide film on at least one surface in order to improve the gas barrier property, and a synthetic resin plate, film or sheet having a low gas barrier property is used as the substrate 101. When used, it is preferable to provide a gas barrier film.
- the anode 102 serves to inject holes into the light emitting layer 105.
- the hole injection layer 103 and / or the hole transport layer 104 are provided between the anode 102 and the light emitting layer 105, holes are injected into the light emitting layer 105 through these layers. .
- Examples of the material for forming the anode 102 include inorganic compounds and organic compounds.
- Examples of inorganic compounds include metals (aluminum, gold, silver, nickel, palladium, chromium, etc.), metal oxides (indium oxide, tin oxide, indium-tin oxide (ITO), indium-zinc oxide) Products (IZO), metal halides (copper iodide, etc.), copper sulfide, carbon black, ITO glass, Nesa glass, and the like.
- Examples of the organic compound include polythiophene such as poly (3-methylthiophene), conductive polymer such as polypyrrole and polyaniline, and the like. In addition, it can select suitably from the substances currently used as an anode of an organic electroluminescent element, and can use it.
- the resistance of the transparent electrode is not limited as long as it can supply a sufficient current for light emission of the light emitting element, but is preferably low resistance from the viewpoint of power consumption of the light emitting element.
- an ITO substrate of 300 ⁇ / ⁇ or less functions as an element electrode, but at present, since it is possible to supply a substrate of about 10 ⁇ / ⁇ , for example, 100 to 5 ⁇ / ⁇ , preferably 50 to 5 ⁇ . It is particularly desirable to use a low resistance product of / ⁇ .
- the thickness of ITO can be arbitrarily selected according to the resistance value, but is usually used in a range of 50 to 300 nm.
- the hole injection layer 103 plays a role of efficiently injecting holes moving from the anode 102 into the light emitting layer 105 or the hole transport layer 104.
- the hole transport layer 104 plays a role of efficiently transporting holes injected from the anode 102 or holes injected from the anode 102 through the hole injection layer 103 to the light emitting layer 105.
- the hole injection layer 103 and the hole transport layer 104 are each formed by laminating and mixing one kind or two or more kinds of hole injection / transport materials or a mixture of the hole injection / transport material and the polymer binder. Is done.
- an inorganic salt such as iron (III) chloride may be added to the hole injection / transport material to form a layer.
- a hole injection / transport material As a hole injection / transport material, it is necessary to efficiently inject and transport holes from the positive electrode between electrodes to which an electric field is applied. The hole injection efficiency is high, and the injected holes are transported efficiently. It is desirable to do. For this purpose, it is preferable to use a substance that has a low ionization potential, a high hole mobility, excellent stability, and is less likely to generate trapping impurities during production and use.
- an arbitrary material can be selected from known materials. Specific examples thereof include carbazole derivatives, triarylamine derivatives, stilbene derivatives, phthalocyanine derivatives, pyrazoline derivatives, hydrazone compounds, benzofuran derivatives, thiophene derivatives, and the like.
- the light emitting layer 105 emits light by recombining holes injected from the anode 102 and electrons injected from the cathode 108 between electrodes to which an electric field is applied.
- the material for forming the light-emitting layer 105 may be a compound that emits light by being excited by recombination of holes and electrons (a light-emitting compound), can form a stable thin film shape, and is in a solid state It is preferable that the compound exhibits a strong light emission (fluorescence) efficiency.
- the light emitting layer may be either a single layer or a plurality of layers, each formed of a light emitting layer material (host material, dopant material).
- a light emitting layer material host material, dopant material
- Each of the host material and the dopant material may be one kind or a plurality of combinations.
- the dopant material may be included in the host material as a whole, or may be included partially.
- As a doping method it can be formed by a co-evaporation method with a host material, but it may be pre-mixed with the host material and then simultaneously deposited.
- the amount of host material used depends on the type of host material and can be determined according to the characteristics of the host material.
- the standard of the amount of the host material used is preferably 50 to 99.999% by weight of the entire light emitting layer material, more preferably 80 to 99.95% by weight, and still more preferably 90 to 99.9% by weight. It is.
- the amount of dopant material used depends on the type of dopant material, and can be determined according to the characteristics of the dopant material.
- the standard of the amount of dopant used is preferably 0.001 to 50% by weight, more preferably 0.05 to 20% by weight, and further preferably 0.1 to 10% by weight of the entire material for the light emitting layer. is there.
- the above range is preferable in that, for example, the concentration quenching phenomenon can be prevented.
- Fluorescent materials and phosphorescent materials exist as materials used for the light emitting layer, and can be arbitrarily selected from known materials.
- Specific examples of the fluorescent material include a fused ring derivative such as anthracene and pyrene, a fluorene derivative, and the like as a host material, and a dopant material can be selected from various materials according to a desired emission color.
- Specific examples of the phosphorescent material include a carbazole derivative as the host material, and an iridium-based metal complex corresponding to the emission color as the dopant material.
- the electron injection layer 107 plays a role of efficiently injecting electrons moving from the cathode 108 into the light emitting layer 105 or the electron transport layer 106.
- the electron transport layer 106 plays a role of efficiently transporting electrons injected from the cathode 108 or electrons injected from the cathode 108 through the electron injection layer 107 to the light emitting layer 105.
- the electron transport layer 106 and the electron injection layer 107 are each formed by laminating and mixing one or more electron transport / injection materials or a mixture of the electron transport / injection material and the polymer binder.
- the electron injection / transport layer is a layer that is responsible for injecting electrons from the cathode and further transporting the electrons. It is desirable that the electron injection efficiency is high and the injected electrons are transported efficiently. For this purpose, it is preferable to use a substance that has a high electron affinity, a high electron mobility, excellent stability, and is unlikely to generate trapping impurities during production and use. However, considering the transport balance between holes and electrons, if the role of effectively preventing the holes from the anode from flowing to the cathode side without recombination is mainly played, the electron transport capability is much higher. Even if it is not high, the effect of improving the luminous efficiency is equivalent to that of a material having a high electron transport capability. Therefore, the electron injection / transport layer in this embodiment may include a function of a layer that can efficiently block the movement of holes.
- an electron transport material for forming the electron transport layer 106 or the electron injection layer 107
- a compound conventionally used as an electron transport compound in a photoconductive material an electron injection layer and an electron transport layer of an organic electroluminescent element can be used. It can be arbitrarily selected from known compounds used.
- Materials used for the electron transport layer or the electron injection layer include compounds composed of aromatic rings or heteroaromatic rings composed of one or more atoms selected from carbon, hydrogen, oxygen, sulfur, silicon and phosphorus, and pyrrole derivatives. And at least one selected from the condensed ring derivatives thereof and metal complexes having electron-accepting nitrogen.
- condensed ring aromatic ring derivatives such as naphthalene and anthracene, styryl aromatic ring derivatives represented by 4,4′-bis (diphenylethenyl) biphenyl, perinone derivatives, coumarin derivatives, naphthalimide derivatives, anthraquinones And quinone derivatives such as diphenoquinone, phosphorus oxide derivatives, carbazole derivatives, and indole derivatives.
- metal complexes having electron-accepting nitrogen include hydroxyazole complexes such as hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. These materials can be used alone or in combination with different materials.
- the electron transport layer or the electron injection layer may further contain a substance capable of reducing the material forming the electron transport layer or the electron injection layer.
- a substance capable of reducing the material forming the electron transport layer or the electron injection layer various substances can be used as long as they have a certain reducing ability.
- Preferred reducing substances include alkali metals such as Na (work function 2.36 eV), K (2.28 eV), Rb (2.16 eV) or Cs (1.95 eV), and Ca (2. 9eV), Sr (2.0 to 2.5 eV) or Ba (2.52 eV), and alkaline earth metals such as those having a work function of 2.9 eV or less are particularly preferable.
- a more preferable reducing substance is an alkali metal of K, Rb or Cs, more preferably Rb or Cs, and most preferably Cs.
- alkali metals have particularly high reducing ability, and by adding a relatively small amount to the material for forming the electron transport layer or the electron injection layer, the luminance of the organic electroluminescence device can be improved and the lifetime can be increased.
- a reducing substance having a work function of 2.9 eV or less a combination of two or more alkali metals is also preferable.
- a combination containing Cs, such as Cs and Na, Cs and K, Cs and Rb, or A combination of Cs, Na and K is preferred.
- Cs such as Cs and Na, Cs and K, Cs and Rb, or A combination of Cs, Na and K is preferred.
- the cathode 108 serves to inject electrons into the light emitting layer 105 through the electron injection layer 107 and the electron transport layer 106.
- the material for forming the cathode 108 is not particularly limited as long as it is a substance that can efficiently inject electrons into the organic layer, but the same material as that for forming the anode 102 can be used.
- metals such as tin, indium, calcium, aluminum, silver, copper, nickel, chromium, gold, platinum, iron, zinc, lithium, sodium, potassium, cesium and magnesium or alloys thereof (magnesium-silver alloy, magnesium -Indium alloys, aluminum-lithium alloys such as lithium fluoride / aluminum, etc.) are preferred.
- Lithium, sodium, potassium, cesium, calcium, magnesium, or alloys containing these low work function metals are effective for increasing the electron injection efficiency and improving device characteristics.
- a passivation composed of metals such as platinum, gold, silver, copper, iron, tin, aluminum and indium, or alloys using these metals, and inorganic materials such as silica, titania and silicon nitride for electrode protection. Laminate the layers. Furthermore, in a top emission structure element, a capping layer having a high refractive index is laminated on the cathode or the passivation layer in order to improve light extraction efficiency, and a cured film formed from the ink composition of the present invention is further laminated. To do.
- the method for producing these electrodes is not particularly limited as long as it is a method for producing electrodes capable of conducting conduction such as resistance heating, electron beam, sputtering, ion plating, and coating. Moreover, it is preferable that a capping layer is comprised using a well-known material.
- the materials used for the hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer can form each layer alone, but as a polymer binder, polyvinyl chloride, polycarbonate, Polystyrene, poly (N-vinylcarbazole), polymethyl methacrylate, polybutyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethyl cellulose, vinyl acetate resin, ABS resin, polyurethane resin It can also be used by dispersing it in solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins, unsaturated polyester resins, alkyd resins, epoxy resins, silicone resins, etc. is there.
- solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins,
- Each layer constituting the organic electroluminescent element is formed by a method such as vapor deposition, resistance heating vapor deposition, electron beam vapor deposition, sputtering, molecular lamination method, printing method, spin coating method or cast method, coating method, etc. It can be formed by using a thin film.
- the film thickness of each layer thus formed is not particularly limited and can be appropriately set according to the properties of the material, but is usually in the range of 2 nm to 5000 nm. The film thickness can usually be measured with a crystal oscillation type film thickness measuring device or the like.
- the vapor deposition conditions vary depending on the type of material, the target crystal structure and association structure of the film, and the like.
- Deposition conditions generally include boat heating temperature +50 to + 400 ° C., vacuum degree 10 ⁇ 6 to 10 ⁇ 3 Pa, deposition rate 0.01 to 50 nm / second, substrate temperature ⁇ 150 to + 300 ° C., film thickness 2 nm to 5 ⁇ m. It is preferable to set appropriately within the range.
- an organic electric field composed of an anode / hole injection layer / hole transport layer / a light emitting layer composed of a host material and a dopant material / electron transport layer / electron injection layer / cathode.
- a method for manufacturing a light-emitting element will be described.
- a thin film of an anode material is formed on a suitable substrate by vapor deposition or the like to produce an anode, and then a thin film of a hole injection layer and a hole transport layer is formed on the anode.
- a host material and a dopant material are co-evaporated to form a thin film to form a light emitting layer.
- An electron transport layer and an electron injection layer are formed on the light emitting layer, and a thin film made of a cathode material is formed by vapor deposition. By forming it as a cathode, a desired organic electroluminescent element can be obtained.
- the order of preparation may be reversed, and the cathode, electron injection layer, electron transport layer, light emitting layer, hole transport layer, hole injection layer, and anode may be fabricated in this order. Is possible.
- a capping layer is formed by a method such as vapor deposition
- a passivation layer is formed by sputtering or chemical vapor deposition
- the ink composition of the present invention is applied by printing.
- a passivation layer is formed by sputtering or chemical vapor deposition.
- the ink composition can be directly applied onto an electrode or the like without forming a passivation film.
- an organic material having an appropriate refractive index is selected according to the refractive index of the underlying cathode, and a material constituting the organic electroluminescent element can also be used.
- a material used for the passivation layer SiO 2 , SiCN, SiCNO, SiNx, Al 2 O 3, or the like can be used. Since the ink composition of the present invention has good resistance to the sputtering process or chemical vapor deposition process, which is a passivation layer forming process, it maintains good optical characteristics even after the passivation layer is formed. Can do.
- the anode When a DC voltage is applied to the organic electroluminescent device thus obtained, the anode may be applied with a positive polarity and the cathode with a negative polarity. When a voltage of about 2 to 40 V is applied, the organic electroluminescent device is transparent or translucent. Luminescence can be observed from the electrode side (anode or cathode, and both). The organic electroluminescence device emits light when a pulse current or an alternating current is applied. The alternating current waveform to be applied may be arbitrary.
- the organic electroluminescent element sealed with the cured film formed from the ink composition of the present invention can be applied to a display device or a lighting device.
- a display device or an illuminating device including an organic electroluminescent element can be manufactured by a known method such as connecting the organic electroluminescent element according to the present embodiment and a known driving device, such as direct current driving, pulse driving, or alternating current. It can be driven by appropriately using a known driving method such as driving.
- Examples of the display device include a panel display such as a color flat panel display, and a flexible display such as a flexible color organic electroluminescence (EL) display (for example, JP-A-10-335066 and JP-A-2003-321546). Gazette, JP-A-2004-281086, etc.).
- Examples of the display method of the display include a matrix and / or segment method. Note that the matrix display and the segment display may coexist in the same panel.
- a matrix is a pixel in which pixels for display are arranged two-dimensionally, such as a grid or mosaic, and displays characters and images as a set of pixels.
- the shape and size of the pixel are determined by the application. For example, a square pixel with a side of 300 ⁇ m or less is usually used for displaying images and characters on a personal computer, monitor, TV, and a pixel with a side of mm order for a large display such as a display panel. become.
- monochrome display pixels of the same color may be arranged. However, in color display, red, green, and blue pixels are displayed side by side. In this case, there are typically a delta type and a stripe type.
- the matrix driving method may be either a line sequential driving method or an active matrix.
- the line-sequential driving has an advantage that the structure is simple. However, the active matrix may be superior in consideration of the operation characteristics, so that it is necessary to properly use it depending on the application.
- a pattern is formed so as to display predetermined information, and a predetermined region is caused to emit light.
- a predetermined region is caused to emit light.
- the time and temperature display in a digital clock or a thermometer the operation state display of an audio device or an electromagnetic cooker, the panel display of an automobile, etc.
- the illuminating device examples include an illuminating device such as a room illuminator, a backlight of a liquid crystal display device, and the like (for example, Japanese Patent Laid-Open Nos. 2003-257621, 2003-277741, and 2004-119211). Etc.)
- the backlight is used mainly for the purpose of improving the visibility of a display device that does not emit light, and is used for a liquid crystal display device, a clock, an audio device, an automobile panel, a display panel, a sign, and the like.
- a backlight for liquid crystal display devices especially personal computers for which thinning is an issue, considering that conventional methods are made of fluorescent lamps and light guide plates, it is difficult to reduce the thickness.
- the backlight using the light emitting element according to the embodiment is thin and lightweight.
- An ink composition was prepared by stirring each component at a composition ratio shown in Table 1 until a uniform solution was obtained.
- Table 2 shows the correspondence between the abbreviations of each component and the names of compounds and products.
- Comparative Example 1 is a composition containing no inorganic nanofiller.
- Comparative Example 2 the inorganic nanofiller was not uniformly dispersed but precipitated.
- cured films were prepared by the following procedure. 0.5 to 1.0 mL of the prepared ink composition was placed on Eagle XG glass of 40 ⁇ 40 ⁇ 0.75 mm, and a coating film was prepared by a spin coating method. Next, UV was irradiated using a belt conveyer type exposure machine (JATEC J-CURE1500), and exposure was performed by adjusting the irradiation time so that the integrated energy was 2000 mJ / cm 2 to prepare a cured film. .
- a belt conveyer type exposure machine JATEC J-CURE1500
- cured films were prepared by the following procedure. 0.5 to 1.0 mL of the prepared ink composition was placed on Eagle XG glass of 40 ⁇ 40 ⁇ 0.75 mm, and a coating film was prepared by a spin coating method. Next, after moving into a glove box filled with nitrogen and expelling the mixed air by flowing nitrogen sufficiently, an exposure machine (HOYA LIGHT SOURCE UL750, light guide is drawn into the glove box) is used. The film was irradiated with UV, and the exposure time was adjusted so that the accumulated energy was 150, 1000, or 1800 mJ / cm 2, and exposure was performed to prepare a cured film.
- HOYA LIGHT SOURCE UL750 light guide is drawn into the glove box
- thermogravimetric analysis of the produced cured film was performed using TG / DTA6200 made from SII.
- thermogravimetric analysis it is possible to estimate the generation temperature and amount of volatile components in the cured product and volatile components generated by decomposition of the cured product.
- the higher the weight reduction temperature the higher the heat resistance of the cured product. It is considered to be low outgassing.
- the amount of weight loss at an arbitrary temperature is evaluated, the amount of outgas generated at that temperature can be estimated.
- the sample used for thermogravimetric analysis was prepared by scraping the cured film from the produced substrate with a cutter knife. This sample was heated from 40 ° C. to 350 ° C. at a temperature increase rate of 10 ° C./min under air, and the temperature at which 1% by weight reduction with respect to the initial weight occurred was defined as 1% weight reduction temperature. Cured films prepared from any of the ink compositions of the examples exhibited high 1% weight loss temperatures in excess of 130 ° C. On the other hand, since the 1% weight loss temperature of Comparative Example 3 was 100 ° C. or less, the amount of outgas of Comparative Example 3 is expected to be larger than that of Examples. In addition, the 1% weight loss temperature of Comparative Examples 1 and 2 was higher than that of Comparative Example 3, but was lower than that of any of the Examples.
- GC-MS gas generated while heating the sample tube is analyzed by GC-MS.
- a thermal desorption GC-MS system (Shimadzu Corporation QP-2010 Ultra) is used.
- TG-DTA thermobalance-photoionization mass spectrometry simultaneous measurement device
- a differential thermobalance-gas chromatography mass simultaneous analysis device (Rigaku TG-DTA / CG-MS) is used.
- the produced film is heated in a furnace, the generated gas is once collected in the secondary trap, and then the secondary trap is heated again, and the desorbed gas is removed by GC-MS.
- a thermal desorption GC-MS system Shiadzu TU-20 and QP-2010 Ultra
- a temperature-programmed desorption gas analyzer for example, a temperature-programmed desorption gas analyzer TPDtype V manufactured by Rigaku
- TPDtype V manufactured by Rigaku
- ⁇ Evaluation of inkjet dischargeability and printability> The evaluation procedure of the inkjet discharge property and printability of an ink composition is shown.
- the ejection performance is evaluated by observing the flight shape of the ink composition droplets from the inkjet ejection holes and the state of adhesion to the periphery of the ejection holes using a camera installed in the apparatus.
- the printability is evaluated by observing the spread of the drawn ink composition droplets and the connection between the droplets.
- the printability of the cured film obtained by photocuring after drawing can also be evaluated by observing the shape of the edges of the drawing part with an optical microscope or the like.
- the shape, smoothness and flatness of the drawing part end of the cured product obtained are determined by optical interference type film thickness meter (Veeco NT-1100 etc.), stylus type film thickness meter (KLATencor P-16 +) and probe type. Observation can be performed using a microscope (for example, an atomic force microscope (AFM)).
- a microscope for example, an atomic force microscope (AFM)
- the ink compositions of Examples 4 and 5 and Comparative Example 1 were subjected to ejection and printability tests using an inkjet device.
- the ink composition was injected into an ink jet cartridge (model number: DMC-11610, discharge amount: 10 pL, manufactured by FUJIFILM, manufactured by Dimatix), and set in an ink jet apparatus DMP-2811 (trade name, manufactured by Dimatix).
- the ejection holes were observed with the camera of the apparatus, and the flight shape of the ejected ink composition droplets was observed.
- drawing was performed on a glass substrate having a SiNx film at an interval of 100 ⁇ m between dots. After drawing, the spread of the droplets was observed using an optical microscope or a CCD camera.
- Examples 15 and 16 had the same good printability as Comparative Example 4 despite the inclusion of nanofillers (Table 4).
- Table 4 the wet spreading property, it was found that the drawn liquid spreads more uniformly than Comparative Example 4 and is preferable for the production of a thin film.
- the ink composition of the present invention eliminates the solvent that is expected to deteriorate the organic thin film device, has good ejection stability of ink jet, and has excellent refractive index, transmittance and outgassing property. It is possible to form a film. For this reason, it can be used for sealants, transparent insulating films or overcoats of organic thin film devices such as organic electroluminescent elements, and for example, improves the light extraction efficiency, which is a problem of the top emission type organic electroluminescent elements that have been mainstream in recent years. Can be made.
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Abstract
Description
第2成分として、少なくとも1種の、式(A-1)で表される化合物と、
Rは水素またはメチル基であり、
Xは-O-または-NH-であり、
Lはエチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、トリ(エチレンオキシ)(-(C2H4O)3-)、プロピレンオキシ(-C3H6O-)、ジ(プロピレンオキシ)(-(C3H6O)2-)またはトリ(プロピレンオキシ)(-(C3H6O)3-)であり、
Eは炭素数1~4のアルキル基、ジシクロペンタジエニル基、フェニル基、炭素数1~4のアルキル基を有するフェニル基、炭素数2~4のアルケニル基、炭素数3~7のエポキシド基、オキセタンを有する炭素数4~8のアルキル基、マレイミドを有する炭素数1~4のアルキル基、または炭素数2~4のラクトン環を有する炭素数1~4のアルキル基である)
第3成分として、少なくとも1種の、分子中に2~6個の(メタ)アクリル基またはアリル基を有する化合物と、
第4成分として、少なくとも1種の、分子量250~1000の重合開始剤と、
任意の第5成分として、前記第2成分とは異なる単官能(メタ)アクリレート系モノマーと、
を含有し、第1~第5成分の合計の重量濃度がインク組成物全重量に対して98~100重量%である、インク組成物。
Rは水素またはメチル基であり、
Xが-O-であり、
Lはエチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、プロピレンオキシ(-C3H6O-)またはジ(プロピレンオキシ)(-(C3H6O)2-)であり、
Eはメチル基、エチル基、ビニル基またはアリル基である、
項1または2に記載のインク組成物。
第1成分が20.0~40.0重量%、
第2成分が10.0~75.0重量%、
第3成分が1.0~30.0重量%、
第4成分が0.1~10.0重量%、
任意の第5成分が0~50.0重量%である(ただし第1~第5成分の合計は98~100重量%とする)、
項1~6のいずれか1項に記載のインク組成物。
化合物群(P-1):窒化ケイ素、窒化酸化ケイ素、窒化炭化ケイ素、窒化酸化炭化ケイ素、および酸化アルミニウムからなる群から選ばれる少なくとも1種の化合物
化合物群(P-2):項1~8のいずれか1項に記載のインク組成物を用いて作製される硬化物、または項9に記載の硬化物
本発明のインク組成物は、第1成分として、平均粒径1~20nmの酸化ジルコニウム、酸化チタン、酸化ハフニウム、チタン酸バリウム、窒化ホウ素および酸化セリウムからなる群から選ばれる少なくとも1種の無機フィラーと、第2成分として、少なくとも1種の、式(A-1)で表される化合物と、第3成分として、少なくとも1種の、分子中に2~6個の(メタ)アクリル基またはアリル基を有する化合物と、第4成分として、少なくとも1種の、分子量250~1000の重合開始剤と、任意の第5成分として、前記第2成分とは異なる単官能(メタ)アクリレート系モノマーとを含有し、第1~第5成分の合計の重量濃度がインク組成物全重量に対して98~100重量%である、インク組成物である。第1~第5成分の合計の重量濃度は98.5~100重量%が好ましく、99~100重量%がより好ましく、99.5~100重量%がさらに好ましい。
無機フィラーは特に限定されないが、Si、Al、Mg、Ca、Sc、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、Ge、As、Se、Rb、Sr、Y、Zr、Nb、Mo、Tc、Ru、Ag、In、Sn、Sb、Te、Cs、Ba、Hf、Ta、W、Re、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Luなどの酸化物、硫酸塩、炭酸塩、フッ化物などの単独塩もしくは、複塩(ZrSiO4、MgAl2O4など)が挙げられる。
本発明において第2成分として用いられる式(A-1)で表される化合物は以下の構造を有する化合物であり、インク組成物中で無機フィラーの分散性を高め、また組成物を希釈する役割を有する。
Rは水素またはメチル基であり、
Xは-O-または-NH-であり、好ましくは-O-であり、
Lはエチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、トリ(エチレンオキシ)(-(C2H4O)3-)、プロピレンオキシ(-C3H6O-)、ジ(プロピレンオキシ)(-(C3H6O)2-)またはトリ(プロピレンオキシ)(-(C3H6O)3-)であり、好ましくは、エチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、プロピレンオキシ(-C3H6O-)またはジ(プロピレンオキシ)(-(C3H6O)2-)であり、
Eは炭素数1~4のアルキル基、ジシクロペンタジエニル基、フェニル基、炭素数1~4のアルキル基を有するフェニル基、炭素数2~4のアルケニル基、炭素数3~7のエポキシド基、オキセタンを有する炭素数4~8のアルキル基、マレイミドを有する炭素数1~4のアルキル基、または炭素数2~4のラクトン環を有する炭素数1~4のアルキル基である。
本発明において第3成分として用いられる分子中に2~6個の(メタ)アクリル基またはアリル基を有する化合物は、アクリレート系モノマー、メタクリレート系モノマーまたはアリル系モノマー(アリルエーテル系モノマーやアリルエステル系モノマーなど)を意味し、アクリル基、メタクリル基またはアリル基の数が1分子中に2~6個であって、さらにアルキル基、アルケニル基、エーテル基およびアリール基を少なくとも1つ有する化合物である。
重合開始剤は、上述した(メタ)アクリレート系モノマーやアリル系モノマーを硬化させるためのものであり、例えば光ラジカル発生剤が好ましく用いられる。
単官能(メタ)アクリレート系モノマーは、希釈性の高い単官能(メタ)アクリレート系モノマーである。第1成分である無機フィラーが分散剤で被覆されており、無機フィラーの濃度が高い場合、隣接する無機フィラーの分散剤が絡み合うことで高い粘度になる。そのために印刷方法に適する低粘度まで調整しなければならない。従来であれば溶媒を加えることで大きく粘度を低減させることができたが、本発明では溶媒量を極めて少なく抑えるか、好ましくは無溶媒であるため、揮発しにくい化合物または硬化により揮発成分が大幅に低減できる化合物を選ぶことが好ましい。なお、第5成分としての単官能(メタ)アクリレート系モノマーは、第2成分の式(A-1)で表される化合物とは異なるモノマーが選択される。
<光増感剤>
本発明のインク組成物には、重合開始剤の活性エネルギー線照射による分解を促進させるために光増感剤を添加することができる。光増感剤は重合開始剤の全重量に対し、0.1~10重量%となる量で用いられることが好ましい。
本発明のインク組成物には界面活性剤を添加することができる。組成物が界面活性剤を含有することで、下地基板への濡れ性、レベリング性や塗布性が向上した組成物を得ることができる。界面活性剤は組成物の全重量に対し、0.01~1重量%となる量で用いられることが好ましい。界面活性剤は1種のみを用いてもよく、2種以上を混合して用いてもよい。
本発明のインク組成物は、目的とする特性に応じて、添加剤を含有してもよい。添加剤としては、例えば、第2成分および第3成分以外のモノマー・ポリマー、帯電防止剤、カップリング剤、酸化防止剤、pH調整剤、還元防止剤などが挙げられる。
例えば、スチレン、メチルスチレン、クロルメチルスチレン、N-シクロヘキシルマレイミド、N-フェニルマレイミド、ビニルトルエン、クロトン酸、α-クロルアクリル酸、ケイ皮酸、マレイン酸、フマル酸、イタコン酸、シトラコン酸、メサコン酸、ポリスチレンマクロモノマー、ポリメチルメタクリレートマクロモノマーなどが挙げられる。
帯電防止剤は、組成物の帯電を防止するために使用することができ、組成物中0~20重量%の量で用いられることが好ましい。帯電防止剤としては、公知の帯電防止剤を用いることができる。具体的には、酸化錫、酸化錫・酸化アンチモン複合酸化物、酸化錫・酸化インジウム複合酸化物などの金属酸化物、四級アンモニウム塩などが挙げられる。帯電防止剤は1種のみを用いてもよく、2種以上を混合して用いてもよい。
カップリング剤としては、特に限定されるものではなく、ガラスやITOとの密着性を向上させるなどの目的でシランカップリング剤などの公知のカップリング剤を用いることができる。シランカップリング剤は、主に本発明の有機電界発光素子用封止剤と有機ELパネルおよび保護用基板とを良好に接着するための接着助剤としての役割を有する。カップリング剤は組成物の固形分(該組成物から溶剤を除いた残分)を100重量部としたときに、10重量部以下になるように添加して用いられることが好ましい。カップリング剤は1種のみを用いてもよく、2種以上を混合して用いてもよい。
組成物が酸化防止剤を含有することで、該組成物から得られる硬化膜が高温または光に曝された場合の劣化を抑制、防止することができる。酸化防止剤は、該酸化防止剤を除く組成物の固形分(該組成物から溶剤を除いた残分)100重量部に対し、0~3重量部添加して用いることが好ましい。酸化防止剤は1種のみを用いてもよく、2種以上を混合して用いてもよい。
インク組成物の含水率は、組成物を100重量%とした場合、0.1重量%以下であることが好ましく、0.06重量%以下であることがより好ましい。有機電界発光素子などの光半導体が配置された電気回路は水分により劣化しやすいので、組成物中の含水率をできるだけ少なくすることが好ましい。組成物中の含水率は、試料サンプルを約0.1g計量し、カールフィッシャー水分計を用いて150℃に加熱し、その際に発生する水分量を測定することにより求めることができる(固体気化法)。
本発明の硬化物(パターン状硬化物を含む)は、本発明のインク組成物を例えばインクジェット用インクとして使用し、インクジェット塗布方法によって塗布して塗膜を形成する工程、および該塗膜を硬化処理する工程を経て得られる。
本発明の硬化膜付き基板は、フィルム基板またはシリコンウエハー基板と、該基板上に上述の硬化膜の形成方法により形成された硬化膜またはパターン状硬化膜とを有する。例えば、光学機能を有する薄膜や有機薄膜デバイスが形成されたポリイミドフィルム、ガラス基板、金属箔またはシリコンウエハー基板などの基板上に、本発明のインク組成物をインクジェット塗布方法によって塗布し、その後、上記で説明したようにUV処理を行い硬化膜を形成させて得られる。
本発明の有機薄膜デバイスは、上述の硬化膜または硬化膜付き基板を有する有機薄膜デバイスである。本発明の硬化膜や硬化膜付き基板を利用することで、フレキシブルな有機薄膜デバイスが得られる。また、本発明の硬化膜をシリコンウエハー基板に適用することもできる。
以下に、本実施形態に係る有機電界発光素子の一例であるトップエミッション構造について図面に基づいて詳細に説明する。図1は、本実施形態に係る有機電界発光素子を示す概略断面図である。また、図2および図3は本実施形態に係る封止構造を有する有機電界発光素子を示す、概略断面図である。
図1に示された有機電界発光素子100は、基板101と、基板101上に設けられたバンク110と、基板101上に設けられた陽極102と、陽極102の上に設けられた正孔注入層103と、正孔注入層103の上に設けられた正孔輸送層104と、正孔輸送層104の上に設けられた発光層105と、発光層105の上に設けられた電子輸送層106と、電子輸送層106の上に設けられた電子注入層107と、電子注入層107の上に設けられた陰極108と、陰極108の上に設けられたキャッピング層109とを有する。
基板101は、有機電界発光素子100の支持体となるものであり、通常、石英、ガラス、金属、プラスチックなどが用いられる。基板101は、目的に応じて板状、フィルム状、またはシート状に形成され、例えば、ガラス板、金属板、金属箔、プラスチックフィルム、プラスチックシートなどが用いられる。なかでも、ガラス板、および、ポリエステル、ポリメタクリレート、ポリカーボネート、ポリイミド、ポリスルホンなどの透明な合成樹脂製の板が好ましい。ガラス基板であれば、ソーダライムガラスや無アルカリガラスなどが用いられ、また、厚みも機械的強度を保つのに十分な厚みがあればよいので、例えば、0.2mm以上あればよい。厚さの上限値としては、例えば、2mm以下、好ましくは1mm以下である。ガラスの材質については、ガラスからの溶出イオンが少ない方がよいので無アルカリガラスの方が好ましいが、SiO2などのバリアコートを施したソーダライムガラスも市販されているのでこれを使用することができる。また、基板101には、ガスバリア性を高めるために、少なくとも片面に緻密なシリコン酸化膜などのガスバリア膜を設けてもよく、特にガスバリア性が低い合成樹脂製の板、フィルムまたはシートを基板101として用いる場合にはガスバリア膜を設けるのが好ましい。
陽極102は、発光層105へ正孔を注入する役割を果たすものである。なお、陽極102と発光層105との間に正孔注入層103および/または正孔輸送層104が設けられている場合には、これらを介して発光層105へ正孔を注入することになる。
正孔注入層103は、陽極102から移動してくる正孔を、効率よく発光層105内または正孔輸送層104内に注入する役割を果たすものである。正孔輸送層104は、陽極102から注入された正孔または陽極102から正孔注入層103を介して注入された正孔を、効率よく発光層105に輸送する役割を果たすものである。正孔注入層103および正孔輸送層104は、それぞれ、正孔注入・輸送材料の一種または二種以上を積層、混合するか、正孔注入・輸送材料と高分子結着剤の混合物により形成される。また、正孔注入・輸送材料に塩化鉄(III)のような無機塩を添加して層を形成してもよい。
発光層105は、電界を与えられた電極間において、陽極102から注入された正孔と、陰極108から注入された電子とを再結合させることにより発光するものである。発光層105を形成する材料としては、正孔と電子との再結合によって励起されて発光する化合物(発光性化合物)であればよく、安定な薄膜形状を形成することができ、かつ、固体状態で強い発光(蛍光)効率を示す化合物であるのが好ましい。
電子注入層107は、陰極108から移動してくる電子を、効率よく発光層105内または電子輸送層106内に注入する役割を果たすものである。電子輸送層106は、陰極108から注入された電子または陰極108から電子注入層107を介して注入された電子を、効率よく発光層105に輸送する役割を果たすものである。電子輸送層106および電子注入層107は、それぞれ、電子輸送・注入材料の一種または二種以上を積層、混合するか、電子輸送・注入材料と高分子結着剤の混合物により形成される。
陰極108は、電子注入層107および電子輸送層106を介して、発光層105に電子を注入する役割を果たすものである。
以上の正孔注入層、正孔輸送層、発光層、電子輸送層および電子注入層に用いられる材料は単独で各層を形成することができるが、高分子結着剤としてポリ塩化ビニル、ポリカーボネート、ポリスチレン、ポリ(N-ビニルカルバゾール)、ポリメチルメタクリレート、ポリブチルメタクリレート、ポリエステル、ポリスルホン、ポリフェニレンオキサイド、ポリブタジエン、炭化水素樹脂、ケトン樹脂、フェノキシ樹脂、ポリアミド、エチルセルロース、酢酸ビニル樹脂、ABS樹脂、ポリウレタン樹脂などの溶剤可溶性樹脂や、フェノール樹脂、キシレン樹脂、石油樹脂、ユリア樹脂、メラミン樹脂、不飽和ポリエステル樹脂、アルキド樹脂、エポキシ樹脂、シリコーン樹脂などの硬化性樹脂などに分散させて用いることも可能である。
有機電界発光素子を構成する各層は、各層を構成すべき材料を蒸着法、抵抗加熱蒸着、電子ビーム蒸着、スパッタリング、分子積層法、印刷法、スピンコート法またはキャスト法、コーティング法などの方法で薄膜とすることにより、形成することができる。このようにして形成された各層の膜厚については特に限定はなく、材料の性質に応じて適宜設定することができるが、通常2nm~5000nmの範囲である。膜厚は通常、水晶発振式膜厚測定装置などで測定できる。蒸着法を用いて薄膜化する場合、その蒸着条件は、材料の種類、膜の目的とする結晶構造および会合構造などにより異なる。蒸着条件は一般的に、ボート加熱温度+50~+400℃、真空度10-6~10-3Pa、蒸着速度0.01~50nm/秒、基板温度-150~+300℃、膜厚2nm~5μmの範囲で適宜設定することが好ましい。
また、本発明のインク組成物から形成される硬化膜で封止した有機電界発光素子は、表示装置または照明装置などにも応用することができる。有機電界発光素子を備えた表示装置または照明装置は、本実施形態にかかる有機電界発光素子と公知の駆動装置とを接続するなど公知の方法によって製造することができ、直流駆動、パルス駆動、交流駆動など公知の駆動方法を適宜用いて駆動することができる。
無機ナノフィラーの沈降・凝集の有無により評価した。比較例1は無機ナノフィラーを含まない組成物である。比較例2のみ無機ナノフィラーが均一に分散せず沈殿した。
実施例1~14、比較例1および3で調製したインク組成物について、粘度および表面張力を測定した(表3)。粘度は、東機産業(株)の粘度計TV-22あるいは(株)アントンパール製のレオメーターMCR302を用いてインク組成物の25℃における粘度を測定した。表面張力は懸滴法により測定した。実施例のいずれのインク組成物もインクジェット印刷が可能な好ましい粘度範囲内であり、良好な吐出安定性が予想された。
実施例1~3、7~10および14、比較例1~3で調製したインク組成物について以下の手順で硬化膜を作製した。調製したインク組成物0.5~1.0mLを40x40x0.75mmのEagleXGガラスに乗せ、スピンコート法で塗布膜を作製した。次いで、ベルトコンベア搬送型露光機(JATEC社製 J-CURE1500)を用いてUVを照射し、積算のエネルギーが2000mJ/cm2となるように照射時間を調整して露光し、硬化膜を作製した。
実施例4~6および11~13で調製したインク組成物について以下の手順で硬化膜を作製した。調製したインク組成物0.5~1.0mLを40x40x0.75mmのEagleXGガラスに乗せ、スピンコート法で塗布膜を作製した。次いで、窒素で満たされたグローブボックス内に移し、窒素を十分に流すことで混入した空気を追い出した後、露光機(HOYA製 LIGHT SOURCE UL750、ライトガイドをグローブボックス内に引き込んである)を用いてUVを照射し、積算のエネルギーが150、1000または1800mJ/cm2となるように照射時間を調整して露光し、硬化膜を作製した。
このようにして作製した硬化膜の屈折率を、大塚電子(株)製FE-3000を用いて測定した(表3)。表3には589.3nmの波長を記載した。実施例のいずれのインク組成物も有機薄膜デバイスの封止剤に求められる高い屈折率を示した。一方、比較例1ではナノフィラーを含まないために低い屈折率であった。
さらにガラス基板を含む状態で硬化膜の全光線透過率およびヘイズを測定した(表3)。全光線透過率およびヘイズの測定には、ヘイズメーター(BYK(株)製のhaze-gard plus)を用いた。リファレンスは空気とした。実施例のいずれのインク組成物も有機薄膜デバイスの封止剤に求められる高い透過率および低いヘイズ値を示した。一方、比較例2ではナノフィラーの凝集のためにヘイズ値が高く、透過率が低かった。
次いで、SII製TG/DTA6200を用いて、作製した硬化膜の熱重量分析を行った。熱重量分析を行うことにより、硬化物中の揮発成分および硬化物の分解により生じた揮発成分の発生温度および量を推定することができ、重量減少温度が高い方が硬化物の耐熱性が高く、低いアウトガス性であると考えられる。また、任意の温度における重量減少量を評価すれば、その温度におけるアウトガスの発生量を見積もることができる。
インク組成物のインクジェット吐出性および印刷性の評価手順を示す。吐出性はインクジェットの吐出孔からのインク組成物の液滴の飛行形状や吐出孔周辺へ付着の様子を装置に設置されているカメラを用いて観察することで評価を行う。印刷性は描画したインク組成物の液滴の広がりや液滴同士のつながりを観察することで評価を行う。また、描画後に光硬化させることで得られる硬化膜を、光学顕微鏡等で描画部端部等の形状を観察することでも印刷性を評価することもできる。
得られた硬化物の描画部端部の形状、平滑性および平面性を、光干渉型膜厚計(Veeco NT-1100など)や触針式膜厚計(KLATencor P-16+)や探針式顕微鏡(例えば、原子間力顕微鏡(AFM)など)を用いて観察することができる。
101 基板
102 陽極
103 正孔注入層
104 正孔輸送層
105 発光層
106 電子輸送層
107 電子注入層
108 陰極
109 キャッピング層
110 バンク
111 バリア層
112 接着層
113 バリアフィルム
121 パッシベーション層
122 バッファー層
130 単一のバリア層
200 積層されたバリア層を有する有機電界発光素子
300 積層されたバリア層を有する有機電界発光素子
400 単一のバリア層を有する有機電界発光素子
Claims (12)
- 第1成分として、平均粒径1~20nmの、酸化ジルコニウム、酸化チタン、酸化ハフニウム、チタン酸バリウム、窒化ホウ素および酸化セリウムからなる群から選ばれる少なくとも1種の無機フィラーと、
第2成分として、少なくとも1種の、式(A-1)で表される化合物と、
Rは水素またはメチル基であり、
Xは-O-または-NH-であり、
Lはエチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、トリ(エチレンオキシ)(-(C2H4O)3-)、プロピレンオキシ(-C3H6O-)、ジ(プロピレンオキシ)(-(C3H6O)2-)またはトリ(プロピレンオキシ)(-(C3H6O)3-)であり、
Eは炭素数1~4のアルキル基、ジシクロペンタジエニル基、フェニル基、炭素数1~4のアルキル基を有するフェニル基、炭素数2~4のアルケニル基、炭素数3~7のエポキシド基、オキセタンを有する炭素数4~8のアルキル基、マレイミドを有する炭素数1~4のアルキル基、または炭素数2~4のラクトン環を有する炭素数1~4のアルキル基である)
第3成分として、少なくとも1種の、分子中に2~6個の(メタ)アクリル基またはアリル基を有する化合物と、
第4成分として、少なくとも1種の、分子量250~1000の重合開始剤と、
任意の第5成分として、前記第2成分とは異なる単官能(メタ)アクリレート系モノマーと、
を含有し、第1~第5成分の合計の重量濃度がインク組成物全重量に対して98~100重量%である、インク組成物。 - 第1成分が、酸化ジルコニウムである、請求項1に記載のインク組成物。
- 第2成分の式(A-1)で表される化合物において、
Rは水素またはメチル基であり、
Xが-O-であり、
Lはエチレンオキシ(-C2H4O-)、ジ(エチレンオキシ)(-(C2H4O)2-)、プロピレンオキシ(-C3H6O-)またはジ(プロピレンオキシ)(-(C3H6O)2-)であり、
Eはメチル基、エチル基、ビニル基またはアリル基である、
請求項1または2に記載のインク組成物。 - 第2成分が、(メタ)アクリル酸2-(2-ビニロキシエトキシ)エチルである、請求項1~3のいずれか1項に記載のインク組成物。
- 第3成分が、(モノ、ジ、トリ、テトラまたはポリ)エチレングリコールジ(メタ)アクリレート、(モノ、ジ、トリ、テトラまたはポリ)プロピレングリコールジ(メタ)アクリレート、(モノ、ジ、トリ、テトラまたはポリ)テトラメチレングリコールジ(メタ)アクリレート、炭素数4~24の(アルカン、アルケンまたはアルキン)ジオールのジ(メタ)アクリレート、エチレンオキサイド変性された炭素数4~24の(アルカン、アルケンまたはアルキン)ジオールのジ(メタ)アクリレート、プロピレンオキサイド変性された炭素数4~24の(アルカン、アルケンまたはアルキン)ジオールのジ(メタ)アクリレート、ジメチロールトリシクロデカンジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、エチレンオキサイド変性されたトリメチロールプロパントリ(メタ)アクリレート、プロピレンオキサイド変性されたトリメチロールプロパントリ(メタ)アクリレート、グリセリントリ(メタ)アクリレート、およびエチレンオキサイド変性されたジグリセリンテトラ(メタ)アクリレートからなる群から選択される少なくとも1種である、請求項1~4のいずれか1項に記載のインク組成物。
- 第3成分が、(モノ、ジ、トリまたはテトラ)エチレングリコールジ(メタ)アクリレート、(モノ、ジまたはトリ)プロピレングリコールジ(メタ)アクリレート、炭素数6~12のアルカンジオールのジ(メタ)アクリレート、エチレンオキサイド変性された炭素数6~12のアルカンジオールのジ(メタ)アクリレート、プロピレンオキサイド変性された炭素数6~12のアルカンジオールのジ(メタ)アクリレート、ジメチロールトリシクロデカンジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、エチレンオキサイド変性されたトリメチロールプロパントリ(メタ)アクリレート、プロピレンオキサイド変性されたトリメチロールプロパントリ(メタ)アクリレート、グリセリントリ(メタ)アクリレート、およびエチレンオキサイド変性されたジグリセリンテトラ(メタ)アクリレートからなる群から選択される少なくとも1種である、請求項1~5のいずれか1項に記載のインク組成物。
- 各成分の含有量が、第1~第5成分合計の重量に対して、
第1成分が20.0~40.0重量%、
第2成分が10.0~75.0重量%、
第3成分が1.0~30.0重量%、
第4成分が0.1~10.0重量%、
任意の第5成分が0~50.0重量%である、
請求項1~6のいずれか1項に記載のインク組成物。 - インク組成物が、粘度5~45mPa・sであり、表面張力18~38mN/mである、請求項1~7のいずれか1項に記載のインク組成物。
- 硬化後の屈折率が1.6~1.8である、請求項1~8のいずれか1項に記載のインク組成物を用いて形成される硬化物。
- バリア層を有する有機薄膜デバイスにおいて、前記バリア層が下記化合物群(P-1)から形成される層および化合物群(P-2)から形成される層の積層体であることを特徴とする有機薄膜デバイス。
化合物群(P-1):窒化ケイ素、窒化酸化ケイ素、窒化炭化ケイ素、窒化酸化炭化ケイ素、および酸化アルミニウムからなる群から選ばれる少なくとも1種の化合物
化合物群(P-2):請求項1~8のいずれか1項に記載のインク組成物を用いて作製される硬化物、または請求項9に記載の硬化物 - 有機電界発光素子である、請求項10に記載の有機薄膜デバイス。
- 請求項10に記載の有機薄膜デバイスの作製方法。
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Cited By (4)
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JP2020506251A (ja) * | 2016-12-29 | 2020-02-27 | スリーエム イノベイティブ プロパティズ カンパニー | 硬化性高屈折率インク組成物及びインク組成物から調製された物品 |
JPWO2021006070A1 (ja) * | 2019-07-05 | 2021-01-14 | ||
WO2022107692A1 (ja) * | 2020-11-18 | 2022-05-27 | 三井化学株式会社 | 有機el表示素子用封止材、その硬化物および有機el表示装置 |
WO2022230637A1 (ja) * | 2021-04-30 | 2022-11-03 | コニカミノルタ株式会社 | 電子デバイス封止用組成物、電子デバイス封止膜形成方法及び電子デバイス封止膜 |
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KR20230088390A (ko) * | 2020-10-14 | 2023-06-19 | 스미또모 가가꾸 가부시키가이샤 | 경화성 조성물 |
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KR102700553B1 (ko) * | 2021-07-02 | 2024-08-29 | (주)휴넷플러스 | 고굴절 특성을 갖는 광경화성 조성물 및 이를 이용하여 제조된 유기발광소자 표시장치 |
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- 2017-08-25 CN CN201780074476.1A patent/CN110024483A/zh active Pending
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WO2022107692A1 (ja) * | 2020-11-18 | 2022-05-27 | 三井化学株式会社 | 有機el表示素子用封止材、その硬化物および有機el表示装置 |
JP7493058B2 (ja) | 2020-11-18 | 2024-05-30 | 三井化学株式会社 | 有機el表示素子用封止材、その硬化物および有機el表示装置 |
WO2022230637A1 (ja) * | 2021-04-30 | 2022-11-03 | コニカミノルタ株式会社 | 電子デバイス封止用組成物、電子デバイス封止膜形成方法及び電子デバイス封止膜 |
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KR20190090791A (ko) | 2019-08-02 |
JPWO2018105177A1 (ja) | 2019-10-24 |
CN110024483A (zh) | 2019-07-16 |
TW201831615A (zh) | 2018-09-01 |
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