CN114058215B - Light-converting ink composition, light-converting laminated substrate produced using same, and light-converting pixel substrate - Google Patents
Light-converting ink composition, light-converting laminated substrate produced using same, and light-converting pixel substrate Download PDFInfo
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- CN114058215B CN114058215B CN202110859711.4A CN202110859711A CN114058215B CN 114058215 B CN114058215 B CN 114058215B CN 202110859711 A CN202110859711 A CN 202110859711A CN 114058215 B CN114058215 B CN 114058215B
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- converting
- ink composition
- chemical formulas
- converting ink
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- 125000003601 C2-C6 alkynyl group Chemical group 0.000 description 1
- 125000000041 C6-C10 aryl group Chemical group 0.000 description 1
- AEFBPMPYAHVRDR-UHFFFAOYSA-N CC1=C(C(=C(C=C1)P(C(C1=CC=CC=C1)=O)=O)C)C Chemical class CC1=C(C(=C(C=C1)P(C(C1=CC=CC=C1)=O)=O)C)C AEFBPMPYAHVRDR-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- IPTNXMGXEGQYSY-UHFFFAOYSA-N acetic acid;1-methoxybutan-1-ol Chemical compound CC(O)=O.CCCC(O)OC IPTNXMGXEGQYSY-UHFFFAOYSA-N 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 1
- IYABWNGZIDDRAK-UHFFFAOYSA-N allene Chemical group C=C=C IYABWNGZIDDRAK-UHFFFAOYSA-N 0.000 description 1
- 239000003146 anticoagulant agent Substances 0.000 description 1
- 229940127219 anticoagulant drug Drugs 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 125000003917 carbamoyl group Chemical group [H]N([H])C(*)=O 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000004976 cyclobutylene group Chemical group 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 125000004956 cyclohexylene group Chemical group 0.000 description 1
- 125000004979 cyclopentylene group Chemical group 0.000 description 1
- 125000004980 cyclopropylene group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- PODOEQVNFJSWIK-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethoxyphenyl)methanone Chemical compound COC1=CC(OC)=CC(OC)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 PODOEQVNFJSWIK-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 1
- 125000000592 heterocycloalkyl group Chemical group 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000009360 ningdong Substances 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 125000005309 thioalkoxy group Chemical group 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—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
- C09D11/30—Inkjet printing inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—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
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- 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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Abstract
The present invention provides a light-converting ink composition, a light-converting laminated substrate and a light-converting pixel substrate manufactured by using the same, wherein the light-converting ink composition comprises luminescent particles (A) and a polymerizable monomer (B), and the luminescent particles comprise cores containing Ag, in, ga and S; and a shell containing at least 2 elements of In, ga, and S, so that light conversion efficiency and ejection characteristics are excellent.
Description
Technical Field
The present invention relates to a light-converting ink composition, a light-converting laminated substrate and a light-converting pixel substrate manufactured by using the same.
Background
With the development of the information society, research into display devices for displaying images has been increasing in various forms, and in recent years, various display devices such as a liquid crystal display device (LCD: liquid Crystal Display), a plasma display device (PDP: plasma Display Panel), and an organic electroluminescence display device (OLED: organic Light Emitting Diode Display Device) have been utilized.
Color reproduction rate is one of the most important elements in a display device. As an example of a recent approach for improving the color reproduction rate of a display device, a display device including a light conversion laminated substrate including quantum dots (quantum dots) which are another light conversion mechanism and which replace a normal white LED with a blue LED has been used. For example, it is desired to improve the light conversion efficiency by applying a light conversion laminated substrate or a light conversion pixel substrate including a light conversion layer in which quantum dots are dispersed to a backlight using a blue LED chip or a color filter including pixels, thereby improving the color reproducibility of a display device.
On the other hand, in order to manufacture a color filter to which the light conversion pixel is applied, a photolithography method using a composition containing light emitting particles such as quantum dots may be used. However, although such a method is excellent in the color filter's fineness and reproducibility, it requires the respective processes of coating, exposing, developing, and curing each color to form pixels, and therefore the manufacturing process, time, and cost are increased, and the number of constraints among the processes is increased, which makes it difficult to control the yield.
In order to solve such a problem, an inkjet printing (inkjet) method is proposed. The inkjet printing method is a technique of forming an image in which each ink is colored by ejecting liquid ink at predetermined positions divided by an inkjet printhead (inkjet head), and can color a plurality of colors including red, green, and blue at a time, so that manufacturing processes, time, and cost can be greatly reduced.
In contrast, korean registered patent publication No. 10-1475520 discloses a technique of a quantum dot ink composition for inkjet printing, and korean registered patent publication No. 10-1628065 discloses a technique of a composition including a light-emitting complex, but the film thickness variation with light conversion efficiency and ejection time is serious, and there is a problem of visible specks.
Therefore, development of a light conversion ink composition capable of forming a light conversion laminated substrate and a light conversion pixel substrate excellent in light conversion efficiency and having a characteristic excellent in uniformity of a pattern film thickness has been demanded.
Prior art literature
Patent literature
Patent document 1: korean registered patent publication No. 10-1475520
Patent document 2: korean registered patent publication No. 10-1628065
Disclosure of Invention
Problems to be solved
An object of the present invention is to provide a light-converting ink composition excellent in light-converting properties and continuous inkjet printing processes.
Further, an object of the present invention is to provide a light conversion laminated substrate and a light conversion pixel substrate manufactured using the above light conversion ink composition.
Means for solving the problems
In order to solve the above problems, the present invention provides a light-converting ink composition comprising a light-emitting particle and a polymerizable monomer, wherein the light-emitting particle comprises a core containing Ag, in, ga, and S; and a shell containing at least 2 elements of In, ga, and S.
The present invention also provides a light-converting laminated substrate and a light-converting pixel substrate manufactured using the light-converting ink composition.
Effects of the invention
If the light conversion ink composition of the present invention is used, not only a relatively high light conversion efficiency is exhibited to enable excellent brightness to be obtained, but also a film thickness variation occurring with the ejection time is small to enable uniform pattern to be achieved. Therefore, when the continuous process is performed, an excellent light conversion coating film free from speckles can be provided.
The present invention can be effectively applied to a backlight unit or a light-converting pixel substrate using the above-described light-converting ink composition.
Drawings
Fig. 1 is a diagram for explaining the measurement result of the light conversion efficiency according to the present invention.
Fig. 2 is a view for explaining a substrate used for evaluation of uniformity of a coating film according to the present invention.
Detailed Description
The present invention provides a light-converting ink composition which comprises a light-emitting particle and a polymerizable monomer and comprises a core and a shell containing a specific metal element as the light-emitting particle, and which is excellent in light-converting efficiency and ejection characteristics, and a light-converting laminated substrate and a light-converting pixel substrate manufactured using the same.
Specifically, the present invention is characterized by comprising a core containing Ag, in, ga and S; and luminescent particles containing a shell of at least 2 elements of In, ga, and S, and thus have a characteristic of improving absorption to a blue light source to improve light conversion efficiency. In particular, by providing a shell containing at least 2 elements of In, ga, and S, a narrow half-value width can be realized, and excellent color purity can be imparted.
In addition, an image display device including a backlight unit and/or a light-converting pixel substrate manufactured using the light-converting ink composition of the present invention has the following advantages: when the half-value width of the converted light is 40nm or less, the color purity is excellent, and color reproducibility of 100% or more with respect to the NTSC color reproduction region can be ensured.
The present invention will be described in detail below.
< light-converting ink composition >
The light-converting ink composition of the present invention contains luminescent particles and a polymerizable monomer, and may further contain one or more of scattering particles, a photopolymerization initiator, an additive, and a solvent.
Luminescent particles
The light emitting particles absorb light of a predetermined wavelength, for example, so that light of a wavelength different from the absorbed wavelength can be emitted. The luminescent nanocrystal particle may be a red luminescent particle that emits light having a luminescence peak wavelength (red light) in the range of 605 to 665nm, may be a green luminescent particle that emits light having a luminescence peak wavelength (green light) in the range of 500 to 600nm, and may be a blue luminescent particle that emits light having a luminescence peak wavelength (blue light) in the range of 420 to 480 nm. The light-converting ink composition of the present invention preferably contains at least one of the above-described luminescent particles.
In the present invention, the light-emitting particles include a semiconductor material, and examples thereof include quantum dots.
According to an embodiment of the present invention, the light emitting particle has a ligand layer on a surface, and the ligand layer may include a compound represented by chemical formula 1 below.
[ chemical formula 1]
In the above-mentioned chemical formula 1,
A is-NH 2 or-SH,
R 1 and R is 2 Each independently being directly linked or being a C1-C12 alkylene group,
R 3 is C1-C10 alkyl or C2-C10 alkenyl or C6-C10 aryl,
L 1 is that
m and n are each independently integers of 0 to 10 but are not simultaneously 0.
In one embodiment of the present invention, the compound represented by chemical formula 1 may be a compound represented by any one of chemical formulas 1-1 to 1-13 below.
[ chemical formula 1-1]
[ chemical formulas 1-2]
[ chemical formulas 1-3]
[ chemical formulas 1-4]
[ chemical formulas 1-5]
[ chemical formulas 1-6]
[ chemical formulas 1-7]
[ chemical formulas 1-8]
[ chemical formulas 1-9]
[ chemical formulas 1-10]
[ chemical formulas 1-11]
[ chemical formulas 1-12]
[ chemical formulas 1-13]
In the present invention, the compound represented by chemical formula 1 acts as an organic ligand to be coordinately bound to the surface of a light-emitting particle (quantum dot) to stabilize the quantum dot. Therefore, when the light-emitting particle of the present invention has a ligand layer containing the compound represented by chemical formula 1 on the surface, the light-emitting particle can exhibit excellent light-emitting characteristics, light-maintaining rate, and process characteristics.
The quantum dots generally produced have a ligand layer on the surface, and immediately after production, the ligand layer is composed of oleic acid (oleic acid), lauric acid (lauric acid), 2- (2-methoxyethoxy) acetic acid, 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid, mono [2- (2-methoxy-ethoxy) -ethyl ] succinate, and the like. In this case, compared with the quantum dot of the present invention including the compound represented by the above chemical formula 1 as a ligand layer, the surface protection effect may be reduced due to the weak binding force between the ligand layer and the quantum dot, which is caused by the unbound defect of the quantum dot surface. In the case of oleic acid, the oleic acid is well dispersed in a saturated hydrocarbon solvent such as n-hexane, an aromatic solvent such as chloroform or benzene, which is a highly volatile compound (VOC: volatile organic compound (volatile organic compound)), but the oleic acid is poorly dispersed in a solvent such as PGMEA or a monomer (photopolymerizable compound).
The quantum dot of the present invention contains the compound represented by chemical formula 1 in the ligand layer, and thus the surface of the quantum dot is protected, and thus the quantum dot can exhibit excellent oxidation stability as compared with conventional quantum dots, and further exhibits an effect of improving optical characteristics because of excellent dispersibility in a monomer.
The quantum dot of the present invention is an aromatic solvent such as chloroform, and exhibits excellent dispersibility in a solvent such as PGMEA, and thus can be used in the production of QLED elements.
In some embodiments, the quantum dot of the present invention includes the compound represented by the above chemical formula 1 in the ligand layer, and may further include oleic acid (oleic acid), lauric acid (lauric acid), 2- (2-methoxyethoxy) acetic acid, 2- [2- (2-methoxyethoxy) ethoxy ] acetic acid, and succinic acid mono- [2- (2-methoxy-ethoxy) -ethyl ] ester, and the like.
In one embodiment of the present invention, the quantum dot has a core-shell structure including a core and a shell covering at least a portion of the core.
In the present invention, the above-mentioned core-shell structure may be a structure composed of a core and a first shell, such as a core/shell structure, and may be a structure composed of a core and a first shell and a second shell, that is, a core/shell structure.
The core contains four element compounds of silver (Ag), indium (In), gallium (Ga) and sulfur (S). For example, the core is agiingas. Such a core has an advantage of being able to absorb a light source of a short wavelength more effectively and minimizing the light absorptivity of the light emitting region, so that excellent light conversion efficiency can be expected even with a small content.
The above-mentioned shell contains at least 2 elements of In, ga, and S, and for example, may contain GaS or the like. In this case, the shell of the present invention can suppress trap emission of the core and maintain the half-value width of the emission wavelength to be narrow, and thus has an effect of improving color purity.
According to an exemplary embodiment, the quantum dot of the core-shell structure may be, but not limited to, againgas/GaS, or the like.
In some embodiments, the present invention may further comprise quantum dots of other structures in addition to the core-shell structures described above, as desired. For example, quantum dots of core-shell structures such as InP/ZnSe/ZnS, inP/ZnS, inGaP/ZnSe/ZnS, and the like may be further included, but are not limited thereto.
The quantum dots may be synthesized by a wet chemical process (wet chemical process), an organometallic chemical vapor deposition process (MOCVD, metal organic chemical vapor deposition), or a molecular beam epitaxy process (MBE, molecular beam epitaxy), but are not limited thereto, and quantum dots having more excellent optical characteristics may be preferably obtained when synthesized by a wet chemical process (wet chemical process).
The wet chemical process is a method of growing particles by adding a precursor to an organic solvent. In the case of crystal growth, the organic solvent naturally coordinates to the surface of the quantum dot crystal to function as a dispersant, thereby adjusting the crystal growth, and therefore, compared with a vapor deposition method such as an organometallic chemical vapor deposition process or molecular beam epitaxy, the growth of nanoparticles can be controlled by a process which is easier and cheaper, and therefore, it is preferable to use the wet chemical process to produce the quantum dot.
In the present invention, the content of the luminescent particles may be 3 to 50 wt%, preferably 5 to 45 wt%, and more preferably 8 to 40 wt% based on 100 wt% of the solid content in the light-converting ink composition. In the case where the content of the luminescent particles is within the above range, the light conversion efficiency can be improved.
When the content of the luminescent particles is less than the content range, the light conversion efficiency is lowered, and it is difficult to realize a high-quality display device. In addition, when the content is more than the above-mentioned content range, the component for realizing the curing is insufficient and the curing degree of the coating film is insufficient, and thus the productivity in the subsequent process of manufacturing the display and the reliability of the product may be lowered.
Polymerizable monomer
In one embodiment of the present invention, the light-converting ink composition comprises a polymerizable monomer.
The polymerizable monomer may include a compound represented by the following chemical formula 2.
[ chemical formula 2]
In the above-mentioned chemical formula 2,
R 4 may be C 1 -C 20 Alkylene, phenylene or C 3 -C 10 Is a cyclic alkylene group of (a),
R 5 and R is 6 Each independently may be hydrogen or methyl, and l may be an integer of 1 to 15.
C as used in the present specification 1 -C 20 The alkylene group of (a) means a straight-chain or branched-chain 2-valent hydrocarbon group having 1 to 20 carbon atoms, and includes, for example, methylene, ethylene, n-propylene, isopropylene, n-butylene, isobutylene, n-pentylene, n-hexylene, n-heptylene, n-octylene, n-nonylene and the like, but is not limited thereto.
C as used in the present specification 3 -C 10 The term "cycloalkylene group" as used herein means a simple or condensed cyclic 2-valent hydrocarbon group having 3 to 10 carbon atoms, and includes, for example, a cyclopropylene group, a cyclobutylene group, a cyclopentylene group, a cyclohexylene group, etc., but is not limited thereto.
The above C 1 -C 20 Alkylene, phenylene and C 3 -C 10 One or more hydrogens of the cycloalkylene group of (C) may be replaced with C 1 -C 6 Alkyl, C of (2) 2 -C 6 Alkenyl, C 2 -C 6 Alkynyl, C 3 -C 10 Cycloalkyl, C 3 -C 10 Heterocycloalkyl, C 3 -C 10 Heterocyclic alkoxy of (C) 1 -C 6 Haloalkyl, C 1 -C 6 Alkoxy, C 1 -C 6 Substituted with thioalkoxy, aryl, acyl, hydroxy, thio (thio), halogen, amino, alkoxycarbonyl, carboxyl, carbamoyl, cyano, nitro, and the like.
In one embodiment of the invention, R 1 May be C 1 -C 20 Alkylene of (C) is preferred 2 -C 16 Alkylene groups of (a). At R 1 Is C 1 -C 20 In the case of the alkylene group, the light-converting ink composition of the present invention is excellent in dispersibility of the luminescent particles even without a solvent, and can improve the jetting property and improve the coating film hardness and thickness uniformity.
According to an embodiment of the present invention, l may be an integer of 1 to 15, and preferably an integer of 1 to 5. In the case of more than the above range, dispersibility may be lowered due to high viscosity.
Specific examples of the compound represented by the above chemical formula 2 include, but are not limited to, 1, 6-hexanediol diacrylate, polyethylene glycol diacrylate, 2-Hydroxy-3-methacryloylpropyl acrylate (2-Hydroxy 3-methacryl propyl acrylate), 1, 9-bisacryloyloxynonane, tripropylene glycol diacrylate, and the like.
The compound represented by chemical formula 2 improves the dispersibility of the luminescent particles, and thus can realize a low-viscosity light-converting ink composition of 80cP or less even without a solvent. Therefore, the light-converting ink composition of the present invention can be effectively used when manufacturing a light-converting laminated substrate by an inkjet printing method.
The light-converting ink composition of the present invention may further contain a polymerizable compound generally used in the art, in addition to the polymerizable monomer represented by the above chemical formula 2, within the limits not departing from the object of the present invention. For example, a monofunctional monomer, a difunctional monomer, another polyfunctional monomer, and the like can be cited, and among them, a difunctional monomer is preferably used.
The type of the monofunctional monomer is not particularly limited, and examples thereof include nonylphenyl carbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acrylate, and N-vinylpyrrolidone.
The type of the difunctional monomer is not particularly limited, and examples thereof include bis (acryloyloxyethyl) ether of bisphenol a.
The type of the polyfunctional monomer is not particularly limited, and examples thereof include trimethylolpropane tri (meth) acrylate, ethoxylated trimethylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa (meth) acrylate, propoxylated dipentaerythritol hexa (meth) acrylate, and the like.
In this case, when the ink composition further contains a polyfunctional curable monomer having three or more functions, the ink composition can have ink jet printing characteristics when the viscosity is controlled to be 80cP or less.
The content of the polymerizable monomer may be 30 to 95% by weight, and preferably 40 to 90% by weight, based on 100% by weight of the entire solid content of the light-converting ink composition. When the content of the polymerizable monomer is within the above range, there is an advantage in terms of strength or smoothness of the pixel portion. When the content of the polymerizable monomer is less than the above range, it is difficult to ensure fluidity for ink ejection, and when the content is more than the above range, the content of the luminescent particles is insufficient and the problem of lowering of light efficiency may occur, so that the content is preferably within the above range.
Scattering particles
The light conversion ink composition of the present invention may further comprise scattering particles.
The scattering particles may be made of a common inorganic material, and preferably may contain a metal oxide having an average particle diameter of 50 to 1000 nm.
The metal oxide may be an oxide containing one metal selected from the group consisting of Li, be, B, na, mg, al, si, K, ca, sc, V, cr, mn, fe, ni, cu, zn, ga, ge, rb, sr, Y, mo, cs, ba, la, hf, W, tl, pb, ce, pr, nd, pm, sm, eu, gd, tb, dy, ho, er, tm, yb, ti, sb, sn, zr, nb, ce, ta, in and a combination thereof, but is not limited thereto.
Specifically, it may be selected from the group consisting of Al 2 O 3 、SiO 2 、ZnO、ZrO 2 、BaTiO 3 、TiO 2 、Ta 2 O 5 、Ti 3 O 5 、ITO、IZO、ATO、ZnO-Al、Nb 2 O 3 、SnO、MgO、BaSO 4 And combinations thereof. Optionally, a material surface-treated with a compound having an unsaturated bond such as an acrylate may be used。
When the light conversion ink composition of the present invention contains scattering particles, the scattering particles are preferable because the light path of light emitted from the light-emitting particles can be increased to improve the overall light efficiency in the light conversion coating. From such a viewpoint, the light-converting ink composition of the present invention preferably contains a light-converting agent selected from TiO 2 、SiO 2 、ZnO、BaSO 4 More than one of them is used as scattering particles.
The scattering particles may have an average particle diameter of 50 to 1000nm, and scattering particles in the range of 100 to 500nm are preferably used. In this case, if the particle size is too small, a sufficient scattering effect of light emitted from the quantum dots cannot be expected, whereas if it is too large, a uniform quality self-luminous layer surface is deposited in the composition or cannot be obtained, and therefore, the use is properly regulated within the above range.
The content of the scattering particles may be 0.5 to 20 wt%, preferably 1 to 15 wt%, and more preferably 2 to 10 wt% based on 100 wt% of the entire solid content of the light-converting ink composition. When the content of the scattering particles is within the above range, the effect of increasing the luminous intensity can be maximized, which is preferable. When the content of the scattering particles is less than the above range, it is difficult to ensure the desired luminous intensity, and when the content is greater than the above range, the transmittance of the blue irradiation light is significantly reduced, and the light conversion of the light-emitting particles does not function, so that the use of the light-emitting particles is preferably appropriately adjusted within the above range.
Photopolymerization initiator
The light conversion ink composition according to an embodiment of the present invention may additionally contain a photopolymerization initiator.
In one embodiment of the present invention, the photopolymerization initiator may be used without any particular limitation as long as it can polymerize the polymerizable monomer. For example, from the viewpoints of polymerization characteristics, initiation efficiency, absorption wavelength, availability, price, and the like, the photopolymerization initiator preferably uses one or more compounds selected from the group consisting of acetophenone-based compounds, benzophenone-based compounds, triazine-based compounds, bisimidazole-based compounds, oxime-based compounds, thioxanthone-based compounds, and phosphine oxide compounds.
For example, when an oxime compound or a phosphine oxide compound is used for curing a thick film of 5 μm or more, more excellent physical properties can be ensured in terms of the curing density and surface roughness of the cured film.
Specific examples of the oxime-based compound include o-ethoxycarbonyl-. Alpha. -oxyimino-1-phenylpropane-1-one, and typical commercial products include Irgacure OXE 01 and OXE 02 from Basoff company.
As specific examples of the phosphine oxide compound, darocur TPO and Lucirin TPO of Basoff company, which are trimethylbenzoylphenyl phosphine oxides, are typical.
The content of the photopolymerization initiator may be 0.1 to 10% by weight, and preferably 0.5 to 8% by weight, based on 100% by weight of the entire solid content of the light-converting ink composition. When the content of the photopolymerization initiator is within the above range, the light-converting ink composition is preferably highly sensitive, the exposure time is shortened, and productivity can be improved. When the content of the photopolymerization initiator is less than the above range, sufficient hardness cannot be obtained due to insufficient curing by light, and when the content is greater than the above range, there is a problem that the light conversion efficiency of the light-emitting particles is drastically increased due to the photopolymerization initiator, and the desired light-emitting intensity cannot be obtained, so that there is an advantage that the intensity of the pixel portion and the smoothness of the surface of the pixel portion are improved when the light-emitting device is used in the above range.
The above photopolymerization initiator may further contain a photopolymerization initiator aid to improve the sensitivity of the light-converting ink composition of the present invention. When the photopolymerization initiator is contained, there is an advantage that the sensitivity is further improved to improve productivity.
The photopolymerization initiator may preferably be one or more compounds selected from the group consisting of amine compounds, carboxylic acid compounds, and organosulfur compounds having a thiol group, but is not limited thereto.
The photopolymerization initiator may be used in addition as appropriate within a range that does not impair the effects of the present invention.
Additive agent
In addition to the above components, the light-converting ink composition according to an embodiment of the present invention may further contain additives such as a surfactant and an adhesion promoter in order to improve the flatness and adhesion of the coating film.
When the light-converting ink composition of the present invention contains the above surfactant, there is an advantage that the flatness of the coating film can be improved. For example, fluorine-based surfactants such as BM-1000, BM-1100 (BM Chemie Co., ltd.), FLUORAD FC-135/FC-170C/FC-430 (Sumitomo 3M Co., ltd.), SH-28PA/-190/-8400/SZ-6032 (Toli silicone Co., ltd.) may be used as the surfactant.
The adhesion promoter may be added to improve adhesion to the substrate, and may include a silane coupling agent having a reactive substituent selected from the group consisting of a carboxyl group, a methacryloyl group, an isocyanate group, an epoxy group, and a combination thereof, but is not limited thereto.
In addition, the light-converting ink composition of the present invention may further contain additives such as antioxidants, ultraviolet absorbers and anticoagulants in a range not impairing the effects of the present invention, and the above additives may be added and used by those skilled in the art as appropriate in a range not impairing the effects of the present invention.
The additive may be used in an amount of 0.01 to 10 wt%, specifically 0.02 to 8 wt%, and more specifically 0.03 to 5 wt%, based on 100 wt% of the total solid content of the light-converting ink composition, but is not limited thereto.
When the content of the additive is within the above range, flatness, adhesion, and the like of the light-converting ink composition can be improved, and thus, it is preferable. If the content of the additive is less than the above range, the desired effect such as flatness and adhesion may be insufficient, and if the content is greater than the above range, there is a problem that the content of the luminescent particles or polymerizable monomer is reduced to decrease the luminescent intensity or the curing degree of the cured film is decreased, so that there is an advantage that the strength of the pixel portion and the flatness or adhesion of the surface of the pixel portion are improved when the composition is used in the above range.
Solvent(s)
The light conversion ink composition according to an embodiment of the present invention may further contain a solvent, and may be a solvent-free type that does not contain a solvent. When the light-converting ink composition of the present invention contains a solvent, for example, the solvent may be further contained in an amount of 20 wt% or less relative to 100 wt% of the entire light-converting ink composition.
Preferably, the light-converting ink composition according to an embodiment of the present invention may be solvent-free from the viewpoint of continuous process.
The light-converting composition of the present invention is excellent in light characteristics and dispersibility of the luminescent particles due to the inclusion of the polymerizable monomer even if it is a solvent-free type containing no solvent, and can realize low viscosity and excellent in nozzle ejection characteristics of the ink.
Examples of the solvent include ether and ester solvents, aliphatic saturated hydrocarbon solvents, halogenated hydrocarbon solvents, and aromatic hydrocarbon solvents, and examples include Propylene Glycol Methyl Ether Acetate (PGMEA), ethylene glycol monoethyl ether acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monoalkyl ethers such as ethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether, diethylene glycol dialkyl ethers such as diethylene glycol dibutyl ether, ethylene glycol alkyl ether acetate such as methyl cellosolve acetate and ethyl cellosolve acetate, alkylene glycol alkyl ether acetate such as propylene glycol monopropyl ether acetate, methoxybutyl acetate, and methoxyamyl acetate, ketones such as benzene, toluene, xylene, and mesitylene, alcohols such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, and cyclohexanone, alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, glycerin, and the like, cyclic esters such as 3-ethoxypropionate, and the like, and the gamma-butyrolactone and the like.
< light conversion laminated substrate, backlight Unit, and image display device >
An embodiment of the present invention is a light-converting laminate substrate that absorbs light emitted from a light-emitting element and converts the light into blue, green, or red light for emission, the light-converting laminate substrate being formed using the light-converting ink composition.
Further, the present invention can provide a light-converting pixel substrate that exhibits color filter functions of RED (RED), GREEN (GREEN), and BLUE (BLUE) manufactured using the above light-converting ink composition.
The light conversion laminated substrate and/or the light conversion pixel substrate may be formed by applying the light conversion ink composition to a predetermined region by an inkjet printing method and curing the applied light conversion ink composition.
Examples of the base material include, but are not limited to, flat surface substrates such as glass substrates, silicon substrates, polycarbonate substrates, polyester substrates, aromatic polyamide substrates, polyamideimide substrates, polyimide substrates, al substrates, gaAs substrates, and the like. These substrates may be subjected to pretreatment such as reagent treatment with a reagent such as a silane coupling agent, plasma treatment, ion plating treatment, sputtering treatment, gas phase reaction treatment, and vacuum vapor deposition treatment. In the case of using a silicon substrate or the like as a substrate, a Charge Coupled Device (CCD), a Thin Film Transistor (TFT), or the like may be formed on the surface of the silicon substrate or the like. In addition, a matrix of barrier ribs may be formed. The above-mentioned curing may be performed in accordance with heat curing conditions.
For example, the curing may be carried out at 100 to 250℃and preferably 150 to 230℃for 5 to 30 minutes, preferably 10 minutes.
In order to form an appropriate phase (phase) on a substrate by ejecting from a piezoelectric inkjet printhead, which is an example of an inkjet printer, characteristics such as viscosity, fluidity, quantum dot particles, and the like need to be well matched to the inkjet printhead. The piezoelectric ink jet print head used in the present invention is not limited, and ejects ink having a droplet size of about 3 to 100pL, preferably about 5 to 40 pL.
The viscosity of the light-converting ink composition of the present invention is suitably from about 3 to 50cP, more preferably in the range of 7 to 40 cP.
The light conversion laminated substrate of the present invention can exhibit excellent light output when applied to a blue light source.
An embodiment of the present invention is a green light emitting element that emits green light, and particularly, but not limited to, may emit green light having a wavelength of 500 to 600 nm.
The green light emitting element may be a green Light Emitting Diode (LED).
An embodiment of the present invention relates to a backlight unit including a light conversion laminated substrate applied to the blue light source.
The backlight unit may further include a light guide plate, a reflection plate, and the like, which are commonly included.
An embodiment of the present invention relates to an image display device including the above-described backlight unit.
The image display device of the present invention includes not only a usual liquid crystal display device but also various image display devices such as an electroluminescent display device, a plasma display device, and a field emission display device.
Further, an embodiment of the present invention relates to a light conversion pixel including a cured product of the light conversion ink composition.
For example, the light conversion pixels may be manufactured by forming a pattern of the light conversion ink composition by including a step of applying the light conversion ink composition to a predetermined area by an inkjet printing method and a step of curing the applied light conversion ink composition.
In the following, in order to facilitate understanding of the present invention, experimental examples including specific examples and comparative examples are provided, but this is merely illustrative of the present invention and does not limit the scope of the appended claims, and it is obvious to those skilled in the art that various changes and modifications may be made to the embodiments within the scope and technical idea of the present invention, and that these also belong to the scope of the appended claims. In addition, "%" and "parts" representing the content are weight basis unless otherwise mentioned.
Synthesis example
Synthesis example 1: synthesis of AgInGaS/GaS core-Shell luminescent particle (A-2)
0.0625mmol of silver iodide (AgI, 99.999%), 1.25mmol of gallium acetylacetonate (Ga (acac) 3, 99.99%) and 1mmol of sulfur (99.998%) were put into a flask (three-necked flask) together with 1.5mL of 1-dodecanethiol (DDT. Gtoreq.98%) and 5mL of oleylamine (OLA, 70%) to prepare a mixed solution, and the mixed solution was heated to 120℃to degas, then N2-purged and heated to a growth temperature of 240 ℃. The AGS core QDs were grown while maintaining the temperature for 30 minutes. To this AGS core solution was added 0.01mmol of indium acetate (In (Ac) 3, 99.99%). After the mixed solution was degassed by heating to 120 ℃, N2 purging was performed and the temperature was raised to a growth temperature of 240 ℃. The AIGS core QD was grown at this temperature for 10 minutes.
30nmol of AIGS core QD was mixed with 7ml of oleylamine, 0.1mmol of gallium acetylacetonate (Ga (acac) 3, 99.99%), 0.1mmol of 1, 3-dimethylthiourea (1, 3-dimethyl-thiourea), and rapidly warmed to 230 ℃. Then, the temperature was raised to 280℃in such a manner that 2℃was increased every 1 minute under inert (insert) conditions. The solution was cooled again to room temperature, and sulfur compounds not involved in the reaction during 30 minutes were removed by degassing (degas). The quantum dots were precipitated in ethanol, centrifuged and purified, and then dried under reduced pressure to obtain AgInGaS/GaS quantum dot powder.
The obtained quantum dot powder was diluted with 0.1w% in chloroform, and then the emission wavelength and half-width were measured using QE-2100 (tsukamurelus electron). The results of measurement of the emission wavelength and half-value width were 523nm and 33nm, respectively.
Synthesis example 2: agInGaS/ZnS core-shell luminescent particle Synthesis (A-3)
A mixed solution was prepared by placing 0.0625mmol of silver iodide (AgI, 99.999%), 1.25mmol of gallium acetylacetonate (Ga (acac) 3, 99.99%) and 1mmol of sulfur (99.998%) together with 1.5mL of 1-dodecanethiol (DDT. Gtoreq.98%) and 5mL of oleylamine (OLA, 70%) in a flask (three-necked flask). After the mixed solution was degassed by heating to 120 ℃, N2 purging was performed and the temperature was raised to a growth temperature of 240 ℃. The AGS core QDs were grown while maintaining the temperature for 30 minutes. To this AGS core solution was added 0.01mmol of indium acetate (In (Ac) 3, 99.99%). After the mixed solution was degassed by heating to 120 ℃, N2 purging was performed and the temperature was raised to a growth temperature of 240 ℃. The AIGS nuclear QDs were grown at this temperature for 30 minutes.
In a three-necked flask, 8mmol of zinc acetate, 8mL of oleic acid and 4mL of 1-octadecene were placed, and the solution was subjected to a degassing (degassing) process for 30 minutes at 110℃and 100mTorr while stirring, then heated at 270℃under an inert gas until the solution became transparent, and then cooled to 60℃to obtain a transparent zinc precursor solution in the form of zinc oleate.
Into a three-necked flask, 8mmol of sulfur (S) and 10mL of tri-n-octylphosphine (TOP) were placed, and the mixture was heated at 80℃with stirring under an inert gas atmosphere until the solution became transparent, and then cooled to room temperature to obtain a TOP/S-form sulfur precursor solution.
An additional three-necked flask was charged with an AIGS nanoparticle solution, the temperature of the flask was adjusted to 240℃and 0.6mL of a zinc precursor solution prepared in advance was rapidly injected by a syringe. Then, 0.3mL of the sulfur precursor solution prepared in advance was injected into the flask at a rate of 2mL/hr using a syringe pump. After the completion of the injection, the reaction was further carried out for 1 hour, and then rapidly cooled to terminate the reaction. The quantum dots were precipitated in ethanol, centrifuged and purified, and then dried under reduced pressure to obtain AgInGaS/ZnS quantum dot powder. Regarding the emission wavelength and half-value width of the obtained quantum dot powder, it was confirmed that the results of measurement by the same method as in synthesis example 1 were 523nm and 42nm, respectively.
Synthesis example 3: agInGaS/ZnSe/ZnS core-shell luminescent particle Synthesis (A-4)
0.0625mmol of AgI (99.999%), 1.25mmol of gallium acetylacetonate (Ga (acac) 3, 99.99%) and 1mmol of sulfur (99.998%) were put into a flask (three-necked flask) together with 1.5mL of 1-dodecanethiol (DDT. Gtoreq.98%) and 5mL of oleylamine (OLA, 70%) to prepare a mixed solution, the mixed solution was heated to 120℃to degas, then N2 purging was performed, and the temperature was raised to 240 ℃. The AGS core QDs were grown while maintaining the temperature for 30 minutes. To this AGS core solution was added 0.01mmol of indium acetate (In (Ac) 3, 99.99%). After the mixed solution was degassed by heating to 120 ℃, N2 purging was performed and the temperature was raised to a growth temperature of 240 ℃. The AIGS nuclear QDs were grown at this temperature for 30 minutes.
Next, 8mmol of zinc acetate, 16mmol of oleic acid and 20mL of trioctylamine were placed in a reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. After placing 2mL of the previously synthesized nuclear solution followed by 16mmol of selenium (Se/TOP) in trioctylphosphine, the final mixture was allowed to react for 2 hours. Ethanol is put into the reaction solution which is rapidly cooled to normal temperature, and the precipitate obtained by centrifugal separation is decompressed, filtered and decompressed and dried, thus forming the AgInGaS/ZnSe core-shell.
Next, 8mmol of zinc acetate, 16mmol of oleic acid and 20mL of trioctylamine were placed in a reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. After placing 2mL of the previously synthesized nuclear solution followed by 16mmol of sulfur (S/TOP) in trioctylphosphine, the final mixture was allowed to react for 2 hours. The quantum dots are precipitated in ethanol, and are subjected to centrifugal separation and refining to obtain AgInGaS/ZnSe/ZnS quantum dot powder. The result of measurement of the luminescence wavelength and half-value width of the obtained quantum dots was 525nm and 45nm, respectively.
Synthesis example 4: inP/ZnS core-shell luminescent particle synthesis (A-5)
In a three-necked flask (3-neg flash) were placed 0.05839g of indium acetate, 0.12019g of oleic acid, and 10mL of 1-Octadecene (ODE). The flask was subjected to a degassing (degaussing) process at 110℃and 100mTorr for 30 minutes with stirring, and then heated at 270℃under an inert gas until the solution became transparent.
As phosphorus (P) precursor, 0.025054g of tris (trimethylsilyl) phosphine was prepared, put into 0.5mL of 1-octadecene and 0.5mL of tri-n-octylphosphine, and rapidly injected while stirring into the above flask heated at 270 ℃ under an inert gas. After 1 hour of reaction, the reaction was quenched to completion. After that, when the temperature of the flask reached 100 ℃, 10mL of toluene was injected, and then transferred to a 50mL centrifuge tube. After adding 10mL of ethanol, the mixture was purified twice by precipitation and redispersion. The refined InP core nano particles are dispersed in 1-octadecene and then stored.
In a three-necked flask, 3.669g of zinc acetate, 20mL of oleic acid and 20mL of 1-octadecene were placed, and the solution was subjected to a degassing (degassing) process for 30 minutes at 110℃and 100mTorr while stirring, then heated at 270℃under an inert gas until the solution became transparent, and then cooled to 60℃to obtain a transparent zinc precursor solution in the form of zinc oleate.
In a three-necked flask, 0.6412g of sulfur (S) and 10mL of tri-n-octylphosphine (TOP) were placed, and the mixture was heated at 80℃with stirring under an inert gas atmosphere until the solution became transparent, and then cooled to room temperature to obtain a TOP/S-form sulfur precursor solution.
Into another three-necked flask, a nanoparticle solution of InP cores prepared in advance was placed, the temperature of the flask was adjusted to 300 ℃, and then 0.6mL of a zinc precursor solution prepared in advance was rapidly injected by a syringe. Then, 0.3mL of the sulfur precursor solution prepared in advance was injected into the flask at a rate of 2mL/hr using a syringe pump. After the completion of the injection, the reaction was further carried out for 1 hour, and then rapidly cooled to terminate the reaction. When the temperature of the flask reached 100 ℃, 10mL of toluene was injected and then transferred to a 50mL centrifuge tube. After adding 10mL of ethanol, the solution was purified twice by precipitation and redispersion, and dried under reduced pressure to obtain InP/ZnS quantum dot powder. The luminescence wavelength and half-value width of the obtained quantum dot are respectively 524nm and 43nm.
Synthesis example 5: inP/ZnSe/ZnS core-shell luminescent particle Synthesis (A-6)
Indium acetate 0.4mmol (0.058 g), palmitic acid 0.6mmol (0.15 g) and 1-octadecene 20mL were placed in a reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was converted to nitrogen. After heating to 280 ℃, a mixed solution of 0.2mmol (58 μl) of tris (trimethylsilyl) phosphine (TMS 3P) and 1.0mL of trioctylphosphine was rapidly injected and reacted for 0.5 minutes.
Next, zinc acetate 2.4mmoL (0.448 g), oleic acid 4.8mmoL and trioctylamine 20mL were placed in a reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. After placing 2mL of the previously synthesized InP core solution followed by 4.8mmol of selenium (Se/TOP) in trioctylphosphine, the final mixture was allowed to react for 2 hours. And (3) adding ethanol into the reaction solution which is rapidly cooled to normal temperature, filtering the precipitate obtained by centrifugal separation under reduced pressure, and drying under reduced pressure to form InP/ZnSe core-shell.
Next, zinc acetate 2.4mmoL (0.448 g), oleic acid 4.8mmoL and trioctylamine 20mL were placed in a reactor and heated to 120℃under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen and the reactor was warmed to 280 ℃. After placing 2mL of the previously synthesized InP/ZnSe core-shell solution followed by 4.8mmol of sulfur (S/TOP) in trioctylphosphine, the final mixture was allowed to react for 2 hours. And (3) adding ethanol into the reaction solution which is rapidly cooled to normal temperature, decompressing and filtering the precipitate obtained by centrifugal separation, decompressing and drying the precipitate, thereby obtaining the quantum dot with InP/ZnSe/ZnS core-shell structure. The luminescence wavelength and half-value width of the obtained quantum dots are 523nm and 43nm respectively.
Synthesis example 6: synthesis of Compound L1
129.2g of 4-t-butoxycarbonylamino-piperidin-1-yl) -acetic acid (Apexmol technology Co.) was placed in a 1000mL 4-necked flask equipped with a Dean stark apparatus (Dean stark), a reflux condenser and a thermometer, and reacted with 73.8 mol (mole) of diethylene glycol monoethyl ether, 1.6g of p-toluenesulfonic acid and 200g of toluene under heating and stirring at 110℃for 8 hours. After confirming the dehydration amount, the reaction was terminated. The reaction was worked up with 10% aqueous sodium bicarbonate, then separated and the organic liquid layer was dried over magnesium sulfate and concentrated under reduced pressure.
Next, 100g of methylene chloride and 3.0g of trifluoroacetic acid were added to the concentrate, and the mixture was reacted at room temperature for 2 hours.
After the completion of the reaction, the reaction mixture was post-treated with a 10% aqueous solution of sodium hydrogencarbonate, then separated into liquid and the organic liquid layer was dried over magnesium sulfate, then concentrated under reduced pressure, and then purified by column purification to give the following compound L1. The obtained amount is as follows: 80g, GC-MS:275.
1 HNMR(400MHz，CDCl3)：δ4.27(t,2H),3.43～3.67(m,8H),3.35(d,2H),2.65(s,1H),1.75～2.25(m,10H),1.13(t,3H)
L1：
synthesis example 7: synthesis of Compound L2
In a 1000mL 4-necked flask equipped with a dean-Stark apparatus, a reflux condenser and a thermometer, 87.6g of 2- (4-thiopiperidin-1-yl) acetic acid, 73.8g of diethylene glycol monoethyl ether, 1.2g of p-toluenesulfonic acid and 200g of toluene were placed, and the mixture was heated and stirred at 110℃for 6 hours. After confirming the dehydration amount, the reaction was terminated. The reaction was put into a 10% aqueous solution of sodium hydrogencarbonate, stirred and then separated, the organic liquid layer was dried over magnesium sulfate, and concentrated under reduced pressure after filtration.
Then, column purification was performed to obtain the following compound L2. The obtained amount is as follows: 75g, GC-MS:292
1 HNMR(400MHz，CDCl3)：δ4.25(t,2H),3.40～3.66(m,8H),3.33(d,2H),2.58(s,1H),1.65～2.26(m,8H),1.11(t,3H)
L2：
Synthesis example 8: synthesis of Compound L3
In a 1000mL 4-necked flask equipped with a dean-Stark apparatus, a reflux condenser and a thermometer, 136.2g of [4- (t-butoxycarbonylamino-methyl) -piperidin-1-yl ] -acetic acid, 82.1g of diethylene glycol monoallyl ether (Aldrich Co.), 3.0g of p-toluenesulfonic acid and 200g of toluene were placed, and the mixture was heated and stirred at 110℃for 6 hours. After confirming the dehydration amount, the reaction was terminated. The reaction was put into a 10% aqueous solution of sodium hydrogencarbonate, stirred and then separated, the organic liquid layer was dried over magnesium sulfate, and concentrated under reduced pressure after filtration.
Next, 100g of methylene chloride and 3.0g of trifluoroacetic acid were added to the concentrate, and the mixture was reacted at room temperature for 2 hours.
After the completion of the reaction, the reaction mixture was post-treated with a 10% aqueous solution of sodium hydrogencarbonate, then separated into liquid and the organic liquid layer was dried over magnesium sulfate, then concentrated under reduced pressure, and then purified by a column to give the following compound L3. The obtained amount is as follows: 96g, GC-MS:301.
1 HNMR(400MHz，CDCl3)：δ5.92(m,1H),4.29(t,2H),4.03(t,2H),3.55～3.66(m,6H),3.31(d,2H),2.60(d,2H),1.40～2.60(m,11H)
L3：
synthesis example 9: synthesis of Compound L4
129.2g of 4-t-butoxycarbonylamino-piperidin-1-yl) -acetic acid (Apexmol technology Co.) was placed in a 1000mL 4-necked flask equipped with a dean-Stark apparatus, reflux condenser and thermometer, and reacted with 153.1g of 2- (2- (2- (2-allyloxyethoxy) ethoxy) ethyl-1-ol, 3.6g of p-toluenesulfonic acid and 200g of toluene under heating and stirring at 110℃for 8 hours. After confirming the dehydration amount, the reaction was terminated. The reaction was post-treated with 10% aqueous sodium bicarbonate, then the solution was separated and the organic liquid layer was dried over magnesium sulfate and concentrated under reduced pressure.
Next, 100g of methylene chloride and 3.0g of trifluoroacetic acid were added to the concentrate, and the mixture was reacted at room temperature for 2 hours.
After the completion of the reaction, the reaction mixture was post-treated with a 10% aqueous solution of sodium hydrogencarbonate, then separated into liquid and the organic liquid layer was dried over magnesium sulfate, then concentrated under reduced pressure, and then purified by a column to give the following compound L4. The obtained amount is as follows: 110g, GC-MS:419.
1 HNMR(400MHz，CDCl3)：δ5.87(m,1H),5.13～5.27(d,2H),4.23(t,2H),4.00(t,2H),3.55～3.69(m,18H),3.32(d,2H),2.61(d,1H),1.70～2.26(m,10H)
L4：
synthesis example 10: quantum dot based on ligand substitution reaction (A-7)
To 3.00g of AIGS quantum dot of A-2 synthesis example, compound L1 was added, and the mixture was heated to 60℃under a nitrogen atmosphere and reacted for one hour.
Next, after adding 25mL of n-hexane to the reaction product to precipitate the quantum dots, the reaction product was centrifuged to separate the precipitate, and then HDDA was added thereto, and the mixture was heated to 80 ℃ and dispersed. The solid content was adjusted to 50% by HDDA. The maximum luminescence wavelength was 522nm.
Synthesis example 11: quantum dot based on ligand substitution reaction (A-8)
Synthesis example 10 was repeated except that "Compound L2" was used in 3.00g of the AIGS quantum dot of Synthesis example A-2.
The solid content was adjusted to 50% by HDDA. The maximum luminescence wavelength was 523nm.
Synthesis example 12: quantum dot based on ligand substitution reaction (A-9)
Synthesis example 10 was repeated except that "Compound L3" was used in 3.00g of the AIGS quantum dot of Synthesis example A-2.
The solid content was adjusted to 50% by HDDA. The maximum luminescence wavelength was 524nm.
Synthesis example 13: quantum dot based on ligand substitution reaction (A-10)
Synthesis example 10 was repeated except that "Compound L4" was used in 3.00g of the AIGS quantum dot of Synthesis example A-2.
The solid content was adjusted to 50% by HDDA. The maximum luminescence wavelength was 526nm.
Synthesis example 14: comparative Synthesis example (A-11)
To 3.00g of the quantum dot of the synthesis example A-5, compound L1 was added, and the mixture was heated to 60℃under a nitrogen atmosphere and reacted for one hour.
Next, after adding 25mL of n-hexane to the reaction product to precipitate the quantum dots, the reaction product was centrifuged to separate the precipitate, and then HDDA was added thereto, and the mixture was heated to 80 ℃ and dispersed. The solid content was adjusted to 50% by HDDA. The maximum luminescence wavelength was 525nm.
Examples and comparative examples: production of light-converting ink composition
The light-converting ink compositions (unit: wt%) were prepared by mixing the respective components according to the compositions shown in tables 1 to 2 below.
TABLE 1
TABLE 2
-A-2：AgInGaS/GaS
-A-3：AgInGaS/ZnS
-A-4：AgInGaS/ZnSe/ZnS
-A-5：InP/ZnS
-A-6：InP/ZnSe/ZnS
-a-7: quantum dot comprising L1 of Synthesis example 10
-a-8: quantum dot comprising L2 of Synthesis example 11
-a-9: synthesis example 12 Quantum dot comprising L3
-a-10: quantum dot comprising L4 of Synthesis example 13
-a-11: quantum dot of Synthesis example 14 (L1 Compound-treated A5 Quantum dot (comparative example))
-B-1:1, 6-hexanediol diacrylate (Xinzhongcun chemical Co., ltd.)
-B-2: polyethylene glycol diacrylate (Xinzhongcun chemical company)
-B-3: 2-hydroxy-3-methacryloylpropyl acrylate (Xinzhongcun chemical Co., ltd.)
-B-4: dipentaerythritol hexaacrylate (Xinzhongcun chemical Co., ltd.)
-B-5: pentaerythritol tetraacrylate (Xinzhongcun chemical company)
-C：TiO 2 (Henschel Co., ltd., TR-88, particle size 220 nm)
-D: irgacure OXE-01 (Basf Co.)
-E: SH8400 (Tao Kang Ningdong Li Silicone Co., ltd.)
-F: propylene Glycol Methyl Ether Acetate (PGMEA)
Experimental example
1. Manufacturing of light conversion coating and measurement of light conversion efficiency
Each of the light-converting ink compositions produced in examples and comparative examples was applied onto a 5cm×5cm glass substrate by ink-jet printing, and then used as an ultraviolet light source at 1000mJ/cm using a 1kW high-pressure mercury lamp containing each of g, h, and i lines 2 After the irradiation, the resultant was heated in a heating oven at 180℃for 30 minutes, thereby producing a light conversion coating.
After the manufactured light conversion coating was placed on top of a blue (blue) light source (XLamp XR-E LED, royal blue 450, cree company), the light conversion efficiency was measured using a brightness measuring instrument (CAS 140CT Spectrometer, instrument systems company) and using the following formula. The results of the measurement are shown in Table 3.
Further, as a result of the measurement of the (a) light conversion efficiency, the improved (B) light conversion efficiency (%) was shown in table 3 with the light conversion efficiency (%) of the InP/ZnS core-shell light-emitting particles of comparative example 3 as 100%.
2. Half width at half maximum (FWHM) of luminescence Spectrum (Spectrum)
The light conversion coating was placed on top of a blue (blue) light source (XLamp XR-E LED, royal blue 450, korey corporation) and the half-value width value of the luminescence spectrum measured by a brightness measuring instrument (CAS 140CT Spectrometer, instrument systems corporation) was taken.
The measured half-value width values are shown in table 3 below, and as the half-value width values become smaller, the color purity becomes better, and particularly when the half-value width is 40nm or less, more excellent color purity can be expected.
3. Uniformity of coating film
As shown in fig. 2, 20pL droplets were dropped on a substrate having a well pattern of 30um in the lateral direction, 90um in the longitudinal direction, and 10um in the depth by a unit ink jet printing apparatus, and then, after 1 hour, ejection was performed on adjacent pixels by the same method. The substrate after the ejection was irradiated with ultraviolet light in the same manner as the method disclosed in the above-mentioned production of the light conversion coating and measurement of the light conversion efficiency, and after heating in a heating oven for 30 minutes, the film thicknesses of the two patterns were measured by a film thickness measuring instrument (Dektak, manufactured by bruke corporation), and then the film thickness change rates between the two patterns were obtained and are shown in table 3.
The film thickness change rate is 0% -5% or below: o (circle)
Film thickness variation rate is greater than 5% and 10% or less: and (V)
Film thickness change rate is greater than 10%: x-shaped glass tube
TABLE 3
From the above experimental results, it was confirmed that the core and the shell of the present invention exhibit relatively high light conversion efficiency, and also have excellent effects in terms of ejection property, flatness and light resistance. Specifically, as described with reference to fig. 1, it was confirmed that (a) the light conversion efficiency (%) was higher in the example of the present invention because the light conversion spectral area was larger than in the comparative example. In particular, it is known that all embodiments of the present invention exhibit a light conversion efficiency of 20% or more, based on the light conversion efficiency (a), and are suitable for pixel formation.
Further, it was confirmed that even more improved uniformity of the coating film could be exhibited when the compound represented by chemical formula 2 was used as the polymerizable monomer as in examples 1 to 6.
In contrast, it was confirmed that the light conversion efficiency of a part of the comparative example was significantly less than 20%, and it was found that the light emission intensity was weak and the light emission was not used as a pixel.
Further, examples of the present invention exhibited half-value widths of 40nm or less, not only excellent color purity, but also excellent film uniformity, however, comparative examples exhibited lower results than examples. In particular, in the case of containing the compound represented by chemical formula 2 as a polymerizable monomer as in examples 1 to 6, it was confirmed that relatively more excellent uniformity of the coating film was exhibited.
Claims (12)
1. A light-converting ink composition comprising luminescent particles and a polymerizable monomer,
the luminescent particle comprises:
a core containing Ag, in, ga and S; and
a shell containing at least 2 elements of In, ga and S,
the luminescent particles have a ligand layer on the surface,
the ligand layer comprises a compound represented by any one of the following chemical formulas 1-1 to 1-13,
chemical formula 1-1
Chemical formula 1-2
Chemical formulas 1-3
Chemical formulas 1-4
Chemical formulas 1-5
Chemical formulas 1-6
Chemical formulas 1-7
Chemical formulas 1-8
Chemical formulas 1-9
Chemical formulas 1-10
Chemical formulas 1-11
Chemical formulas 1-12
Chemical formulas 1-13
2. The light converting ink composition of claim 1, the shell comprising GaS.
3. The light-converting ink composition according to claim 1, wherein the polymerizable monomer comprises a compound represented by the following chemical formula 2,
chemical formula 2
In the chemical formula 2 described above, a compound having a structure of,
R 4 is C 1 -C 20 Alkylene, phenylene or C 3 -C 10 Is a cyclic alkylene group of (a),
R 5 and R is 6 Each independently of the other is hydrogen or methyl,
l is an integer of 1 to 15.
4. The light-converting ink composition according to claim 3, wherein the polymerizable monomer further comprises a monofunctional monomer or a polyfunctional monomer having 3 or more unsaturated double bonds.
5. The light-converting ink composition according to claim 3, wherein the compound represented by chemical formula 2 comprises at least one selected from the group consisting of 1, 6-hexanediol diacrylate, polyethylene glycol diacrylate, 2-hydroxy-3-methacryloylpropyl acrylate, 1, 9-bisacryloyloxynonane, and tripropylene glycol diacrylate.
6. The light-converting ink composition according to claim 1, further comprising one or more selected from the group consisting of scattering particles, photopolymerization initiators, additives, and solvents.
7. The light-converting ink composition of claim 6, the scattering particles comprising a material selected from the group consisting of Al 2 O 3 、SiO 2 、ZnO、ZrO 2 、BaTiO 3 、TiO 2 、Ta 2 O 5 、Ti 3 O 5 、ITO、IZO、ATO、ZnO-Al、Nb 2 O 3 More than one of the group consisting of SnO, mgO and combinations thereof.
8. The light-converting ink composition according to claim 1, which is a solvent-free type containing no solvent.
9. A light-converting laminate substrate produced using the light-converting ink composition according to any one of claims 1 to 8.
10. A backlight unit comprising the light conversion laminated substrate according to claim 9.
11. A light-converting pixel substrate produced using the light-converting ink composition according to any one of claims 1 to 8.
12. An image display device comprising the backlight unit of claim 10 or the light conversion pixel substrate of claim 11.
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