WO2021192795A1 - 色変換組成物、色変換フィルム、それを含む光源ユニット、ディスプレイおよび照明ならびに化合物 - Google Patents
色変換組成物、色変換フィルム、それを含む光源ユニット、ディスプレイおよび照明ならびに化合物 Download PDFInfo
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- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- 235000021286 stilbenes Nutrition 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000000547 substituted alkyl group Chemical group 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid group Chemical class S(N)(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 1
- 150000003455 sulfinic acids Chemical class 0.000 description 1
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- 230000002194 synthesizing effect Effects 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- 229940116411 terpineol Drugs 0.000 description 1
- 125000001981 tert-butyldimethylsilyl group Chemical group [H]C([H])([H])[Si]([H])(C([H])([H])[H])[*]C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000000037 tert-butyldiphenylsilyl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1[Si]([H])([*]C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003560 thiocarbamic acids Chemical class 0.000 description 1
- 150000003566 thiocarboxylic acids Chemical class 0.000 description 1
- 229930192474 thiophene Chemical group 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- NZFNXWQNBYZDAQ-UHFFFAOYSA-N thioridazine hydrochloride Chemical class Cl.C12=CC(SC)=CC=C2SC2=CC=CC=C2N1CCC1CCCCN1C NZFNXWQNBYZDAQ-UHFFFAOYSA-N 0.000 description 1
- 150000005075 thioxanthenes Chemical class 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
- FICPQAZLPKLOLH-UHFFFAOYSA-N tricyclohexyl phosphite Chemical compound C1CCCCC1OP(OC1CCCCC1)OC1CCCCC1 FICPQAZLPKLOLH-UHFFFAOYSA-N 0.000 description 1
- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000005428 wave function Effects 0.000 description 1
- 125000001834 xanthenyl group Chemical class C1=CC=CC=2OC3=CC=CC=C3C(C12)* 0.000 description 1
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- 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
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- 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
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Definitions
- the present invention relates to a color conversion composition, a color conversion film, a light source unit containing the same, a display and illumination, and a compound.
- the color conversion means converting the light emitted from the light emitter into light having a longer wavelength, and examples thereof include converting blue light emission into green or red light emission.
- a full-color display can be manufactured by using a white light source, which is a combination of such a blue light source and a film having a color conversion function, as a backlight unit, and combining the liquid crystal driving portion and a color filter. Further, a white light source in which a blue light source and a film having a color conversion function are combined can be used as it is as a white light source such as LED lighting.
- One of the issues with liquid crystal displays that use the color conversion method is the improvement of color reproducibility and durability.
- it is effective to narrow the half-value width of the blue, green, and red emission spectra of the backlight unit and increase the color purity of each of the blue, green, and red colors.
- a color conversion material containing a pyrromethene compound has been proposed (see, for example, Patent Documents 1 and 2).
- a technique for improving durability a technique for adding a light stabilizer (see, for example, Patent Document 3) has been proposed, but the durability is still insufficient and the stabilizer absorbs visible light. Therefore, there is also a problem in brightness.
- a color conversion composition for converting incident light into light having a wavelength longer than that of the incident light wherein (A) at least one kind of light emitting material, (B). )
- a color conversion composition containing at least one of a binder resin, (C) tertiary amine, a catechol derivative and a nickel compound has been proposed (see, for example, Patent Document 4).
- JP-A-2010-61824 Japanese Unexamined Patent Publication No. 2014-136771 Japanese Unexamined Patent Publication No. 2019-50381 International Publication No. 2017/014068
- Patent Document 4 By the technique described in Patent Document 4, it is possible to obtain a color conversion composition having excellent color reproducibility, little decrease in brightness even after continuous use for a long time, and excellent durability. However, it has been found that there is a new problem that the chromaticity changes slightly with long-term use in response to the recent demand for further miniaturization and high definition.
- an object of the present invention is to provide a color conversion composition having excellent chromaticity durability.
- the present invention is a color conversion composition containing the following components (A), (B) and (C).
- the color conversion composition of the present invention and the color conversion film using the same can improve the durability of chromaticity.
- the schematic cross-sectional view which shows an example of the color conversion film of this invention The schematic cross-sectional view which shows an example of the color conversion film of this invention.
- the color conversion composition of the present invention contains at least one luminescent material.
- the light emitting material in the present invention refers to a material that emits light having a wavelength different from that of the light when irradiated with some kind of light.
- the light emitting material examples include inorganic phosphors, fluorescent pigments, fluorescent dyes, quantum dots, and the like. Two or more of these may be contained. In order to achieve highly efficient color conversion, a material exhibiting light emission characteristics with a high quantum yield is preferable, a quantum dot and an organic light emitting material are preferable, and an organic light emitting material is more preferable.
- organic light emitting material for example Compounds and derivatives having fused aryl rings such as naphthalene, anthracene, phenanthrene, pyrene, chrysene, naphthacene, triphenylene, perylene, fluoranthene, fluorene, and indene; Furan, pyrrol, thiophene, silol, 9-silafluorene, 9,9'-spirobicilafluorene, benzothiophene, benzofuran, indole, dibenzothiophene, dibenzofuran, imidazopyridine, phenanthroline, pyridine, pyrazine, diazanaphthalene, quinoxaline, pyrolopyridine
- Compounds having a heteroaryl ring such as and derivatives thereof; Borane derivative; 1,4-Distyrylbenzene, 4,4'-bis (2- (4-diphenylaminophenyl)
- the organic light emitting material may be a fluorescent light emitting material or a phosphorescent light emitting material, but in order to achieve high color purity, the fluorescent light emitting material is preferable.
- the pyrromethene derivative can be preferably used in that it gives a high fluorescence quantum yield and has better durability of chromaticity. More preferably, it is a compound represented by the general formula (1).
- R 1 to R 9 may be the same or different, respectively, and hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group, alkoxy group, alkylthio group and aryl.
- Ether group arylthioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, boryl group, It is selected from a fused ring and an aliphatic ring formed between a phosphine oxide group and an adjacent substituent.
- hydrogen may be deuterium.
- the substituted or unsubstituted aryl group having 6 to 40 carbon atoms is 6 to 40 including the carbon number contained in the substituent substituted with the aryl group, and defines the carbon number. The same applies to other substituents.
- the substituents in the case of substitution include an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group and an alkylthio group.
- Aryl ether group, aryl thioether group, aryl group, heteroaryl group, halogen, cyano group, aldehyde group, carbonyl group, carboxyl group, oxycarbonyl group, carbamoyl group, amino group, nitro group, silyl group, siroxanyl group, boryl A group and a phosphine oxide group are preferable, and a specific substituent which is preferable in the description of each substituent is preferable. Further, these substituents may be further substituted with the above-mentioned substituents.
- the alkyl group refers to a saturated aliphatic hydrocarbon group such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group and a tert-butyl group, which are substituents. May or may not have.
- the additional substituent when substituted is not particularly limited, and examples thereof include an alkyl group, a halogen, an aryl group, and a heteroaryl group, and this point is also common to the following description.
- the number of carbon atoms of the alkyl group is not particularly limited, but is preferably 1 or more and 20 or less, and more preferably 1 or more and 8 or less from the viewpoint of availability and cost.
- the cycloalkyl group indicates, for example, a saturated alicyclic hydrocarbon group such as a cyclopropyl group, a cyclohexyl group, a norbornyl group, and an adamantyl group, which may or may not have a substituent.
- the number of carbon atoms in the alkyl group moiety is not particularly limited, but is preferably in the range of 3 or more and 20 or less.
- the heterocyclic group refers to an aliphatic ring having an atom other than carbon such as a pyran ring, a piperidine ring, and a cyclic amide in the ring, which may or may not have a substituent. ..
- the number of carbon atoms of the heterocyclic group is not particularly limited, but is preferably in the range of 2 or more and 20 or less.
- the alkenyl group refers to an unsaturated aliphatic hydrocarbon group containing a double bond such as a vinyl group, an allyl group, or a butadienyl group, which may or may not have a substituent.
- the carbon number of the alkenyl group is not particularly limited, but is preferably in the range of 2 or more and 20 or less.
- the cycloalkenyl group refers to an unsaturated alicyclic hydrocarbon group containing a double bond such as a cyclopentenyl group, a cyclopentadienyl group, a cyclohexenyl group, etc., which may have a substituent. You don't have to.
- the number of carbon atoms of the cycloalkenyl group is not particularly limited, but is preferably in the range of 3 or more and 20 or less.
- the alkynyl group refers to an unsaturated aliphatic hydrocarbon group containing a triple bond such as an ethynyl group, which may or may not have a substituent.
- the number of carbon atoms of the alkynyl group is not particularly limited, but is preferably in the range of 2 or more and 20 or less.
- the alkoxy group refers to a functional group to which an aliphatic hydrocarbon group is bonded via an ether bond such as a methoxy group, an ethoxy group, or a propoxy group, and even if the aliphatic hydrocarbon group has a substituent. You do not have to have it.
- the number of carbon atoms of the alkoxy group is not particularly limited, but is preferably in the range of 1 or more and 20 or less.
- the alkylthio group is one in which the oxygen atom of the ether bond of the alkoxy group is replaced with a sulfur atom.
- the hydrocarbon group of the alkylthio group may or may not have a substituent.
- the number of carbon atoms of the alkylthio group is not particularly limited, but is preferably in the range of 1 or more and 20 or less.
- the aryl ether group refers to a functional group to which an aromatic hydrocarbon group is bonded via an ether bond, for example, a phenoxy group, and the aromatic hydrocarbon group may or may not have a substituent. good.
- the number of carbon atoms of the aryl ether group is not particularly limited, but is preferably in the range of 6 or more and 40 or less.
- the arylthio ether group is one in which the oxygen atom of the ether bond of the aryl ether group is replaced with a sulfur atom.
- the aromatic hydrocarbon group in the aryl ether group may or may not have a substituent.
- the number of carbon atoms of the aryl ether group is not particularly limited, but is preferably in the range of 6 or more and 40 or less.
- the aryl group is, for example, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthrasenyl group, a benzophenanthryl group, a benzoanthrase.
- aromatic hydrocarbon group such as an Nyl group, a chrysenyl group, a pyrenyl group, a fluoranthenyl group, a triphenylenyl group, a benzofluoranthenyl group, a dibenzoanthrasenyl group, a perylenel group and a helisenyl group.
- a phenyl group a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, an anthracenyl group, a pyrenyl group, a fluoranthenyl group and a triphenylenyl group are preferable.
- the aryl group may or may not have a substituent.
- the number of carbon atoms of the aryl group is not particularly limited, but is preferably in the range of 6 or more and 40 or less, and more preferably 6 or more and 30 or less.
- the aryl group is preferably a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group, an anthrasenyl group, preferably a phenyl group, a biphenyl group, A terphenyl group and a naphthyl group are more preferable. More preferably, it is a phenyl group, a biphenyl group, a terphenyl group, and a phenyl group is particularly preferable.
- the aryl group is preferably a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a phenanthryl group or an anthrasenyl group, preferably a phenyl group, a biphenyl group or a ter.
- a phenyl group and a naphthyl group are more preferable. Particularly preferably, it is a phenyl group.
- the heteroaryl group is, for example, a pyridyl group, a furanyl group, a thiophenyl group, a quinolinyl group, an isoquinolinyl group, a pyrazinyl group, a pyrimidyl group, a pyridadinyl group, a triazinyl group, a naphthyldinyl group, a synnolinyl group, a phthalazinyl group, a quinoxalinyl group, a quinazolinyl group, and the like.
- the naphthyldinyl group is any of 1,5-naphthylidineyl group, 1,6-naphthylidineyl group, 1,7-naphthylidineyl group, 1,8-naphthylidineyl group, 2,6-naphthylidineyl group and 2,7-naphthylidineyl group. Indicates.
- the heteroaryl group may or may not have a substituent.
- the number of carbon atoms of the heteroaryl group is not particularly limited, but is preferably in the range of 2 or more and 40 or less, and more preferably 2 or more and 30 or less.
- the heteroaryl groups include pyridyl group, furanyl group, thiophenyl group, quinolinyl group, pyrimidyl group, triazinyl group, benzofuranyl group, benzothiophenyl group and indolyl group.
- Dibenzofuranyl group, dibenzothiophenyl group, carbazolyl group, benzoimidazolyl group, imidazoly pyridyl group, benzoxazolyl group, benzothiazolyl group, phenanthrolinyl group are preferable, and pyridyl group, furanyl group, thiophenyl group and quinolinyl group are preferable. More preferred. Particularly preferred is a pyridyl group.
- the heteroaryl group includes a pyridyl group, a furanyl group, a thiophenyl group, a quinolinyl group, a pyrimidyl group, a triazinyl group, a benzofuranyl group, a benzothiophenyl group, an indolyl group, and the like.
- a dibenzofuranyl group, a dibenzothiophenyl group, a carbazolyl group, a benzoimidazolyl group, an imidazole pyridyl group, a benzoxazolyl group, a benzothiazolyl group and a phenanthrolinyl group are preferable, and a pyridyl group, a furanyl group, a thiophenyl group and a quinolinyl group are more preferable. preferable. Particularly preferred is a pyridyl group.
- Halogen refers to an atom selected from fluorine, chlorine, bromine and iodine.
- the carbonyl group, carboxyl group, oxycarbonyl group, and carbamoyl group may or may not have a substituent.
- substituents include an alkyl group, a cycloalkyl group, an aryl group, a heteroaryl group and the like, and these substituents may be further substituted.
- the amino group is a substituted or unsubstituted amino group.
- substituents in the case of substitution include an aryl group, a heteroaryl group, a linear alkyl group and a branched alkyl group.
- aryl group and heteroaryl group a phenyl group, a naphthyl group, a pyridyl group and a quinolinyl group are preferable. These substituents may be further substituted.
- the number of carbon atoms is not particularly limited, but is preferably 2 or more and 50 or less, more preferably 6 or more and 40 or less, and particularly preferably 6 or more and 30 or less.
- the silyl group is, for example, an alkylsilyl group such as a trimethylsilyl group, a triethylsilyl group, a tert-butyldimethylsilyl group, a propyldimethylsilyl group, a vinyldimethylsilyl group, a phenyldimethylsilyl group, a tert-butyldiphenylsilyl group, or a tri. It shows an arylsilyl group such as a phenylsilyl group and a trinaphthylsilyl group. Substituents on silicon may be further substituted.
- the number of carbon atoms of the silyl group is not particularly limited, but is preferably in the range of 1 or more and 30 or less.
- the siloxanyl group refers to a silicon compound group via an ether bond such as a trimethylsiloxanyl group. Substituents on silicon may be further substituted.
- the boryl group is a substituted or unsubstituted boryl group.
- substituent in the case of substitution include an aryl group, a heteroaryl group, a linear alkyl group, a branched alkyl group, an aryl ether group, an alkoxy group and a hydroxyl group, and among them, an aryl group and an aryl ether group are preferable.
- R 10 R 11 is selected from the same group as R 1 to R 9.
- any adjacent disubstituted groups may be bonded to each other to form a conjugated or non-conjugated fused ring.
- the constituent elements of the fused ring may contain elements selected from nitrogen, oxygen, sulfur, phosphorus and silicon in addition to carbon.
- the condensed ring may be condensed with yet another ring.
- the compound represented by the general formula (1) exhibits a high fluorescence quantum yield and has a small peak half-value width of the emission spectrum, so that efficient color conversion and high color purity can be achieved, and chromaticity can be achieved. Durability can be further improved.
- the compound represented by the general formula (1) has various properties such as luminous efficiency, color purity, thermal stability, photostability, and dispersibility by introducing an appropriate substituent at an appropriate position.
- Physical properties can be adjusted.
- at least one of R 1 , R 3 , R 4 and R 6 is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl as compared with the case where R 1 , R 3 , R 4 and R 6 are all hydrogen.
- Group, substituted or unsubstituted heteroaryl groups show better thermal and photostability.
- R 1 , R 3 , R 4 and R 6 are methyl group, ethyl group, isopropyl group, tert-butyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, pyridyl group, quinolinyl group. .. Further, R 1 , R 3 , R 4 and R 6 may be the same or different from each other.
- R 2 and R 5 are preferably hydrogen, an alkyl group, a carbonyl group, an oxycarbonyl group, or an aryl group, but from the viewpoint of thermal stability, an alkyl group or hydrogen is preferable, and a narrow half-price range can be easily obtained in the emission spectrum. Hydrogen is more preferred.
- R 8 and R 9 are preferably an alkyl group, an aryl group, a heteroaryl group, a fluorine, a fluorine-containing alkyl group, a fluorine-containing heteroaryl group or a fluorine-containing aryl group, and are stable to excitation light and have a higher fluorescence quantum yield. More preferably, it is a fluorine or a fluorine-containing aryl group. Since R 8 and R 9 are fluorine or fluorine-containing aryl groups, the electron donor property of the compound represented by the general formula (1) is weakened, so that the electronic interaction with the component (C) is suppressed. And a high fluorescence quantum yield can be obtained.
- At least one of R 1 to R 7 is an appropriately bulky substituent in terms of suppressing a decrease in the quantum yield of the component (A) due to the component (C). Since the color conversion composition of the present invention contains the component (A) and the component (C) in the same layer, collision of the component (A) and the component (C) may occur due to thermal diffusion. When the component (C) and the luminescent material in the excited state collide, the excitation energy of the luminescent material is transferred to the molecule of the component (C), the luminescent material in the excited state is deactivated, and the quantum yield of the component (A) is increased. It may decrease.
- R 1 to R 7 are appropriately bulky substituents, such a decrease in the quantum yield of the component (A) can be suppressed.
- R 2 at least one of R 5, R 7 is a moderately bulky substituent, R 2, R 5, and particularly preferably R 7 all are moderately bulky substituent.
- Examples of the moderately bulky substituents of R 2 and R 5 include an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkoxy group, an alkylthio group, an aryl ether group and an arylthio ether.
- Examples thereof include a group, an aryl group, a heteroaryl group, a carbonyl group, a carboxyl group, an oxycarbonyl group, an ester group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, a boryl group and a phosphine oxide group.
- an alkyl group, a cycloalkyl group, an aryl group and an ester group are more preferable.
- r is hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, hydroxyl group, thiol group, alkoxy group, alkylthio group, aryl ether group, arylthioether group, aryl group, heteroaryl.
- k is an integer of 1 to 3. When k is 2 or more, r may be the same or different.
- R is preferably a substituted or unsubstituted aryl group.
- aryl groups a phenyl group and a naphthyl group are particularly preferable examples.
- k in the general formula (2) is preferably 1 or 2, and k is 2 from the viewpoint of further suppressing the decrease in the fluorescence quantum yield of the component (A) due to the component (C). Is more preferable.
- the alkyl group in this case, a methyl group, an ethyl group and a tert-butyl group are particularly preferable examples.
- aryl group When r is an aryl group, a phenyl group and a naphthyl group are preferable, and these aryl groups are further an alkyl group, a heterocyclic group, an alkenyl group, a hydroxyl group, an alkoxy group, an aryl ether group, an aryl group, a heteroaryl group, a halogen, and the like. It may be substituted with a cyano group, a carboxyl group, an ester group, an oxycarbonyl group, or an alkoxy group.
- r is preferably a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group or a halogen, and is preferably methyl.
- a group, an ethyl group, a tert-butyl group and a methoxy group are more preferable. From the viewpoint of dispersibility, a tert-butyl group and a methoxy group are particularly preferable, and quenching due to aggregation of molecules can be prevented.
- At least one of R 1 to R 7 is an electron attracting group.
- at least one of R 1 to R 6 is an electron attracting group
- R 7 is an electron attracting group
- R 7 is an electron attracting group.
- the reaction rate inactivated by the component (C) is faster than the reaction rate in which singlet oxygen oxidizes the component (A), and the effect of the component (C) on improving the durability of chromaticity is more remarkable. It becomes a thing.
- An electron-withdrawing group is also called an electron-accepting group, and is an atomic group that attracts electrons from an atomic group substituted by an inductive effect or a resonance effect in organic electron theory.
- Examples of the electron attracting group include those having a positive value as the substituent constant ( ⁇ p (para)) of Hammett's law.
- the substituent constant ( ⁇ p (para)) of Hammett's law can be quoted from the 5th edition of the Basics of Chemistry Handbook (page II-380).
- the electron attracting group of the present application does not include the phenyl group.
- Examples of electron attracting groups include -F ( ⁇ p: +0.20), -Cl ( ⁇ p: +0.28), -Br ( ⁇ p: +0.30), -I ( ⁇ p: +0.30), -CO 2 R 12 ( ⁇ p: +0.45 when R 12 is an ethyl group), -CONH 2 ( ⁇ p: +0.38), -COR 12 ( ⁇ p: +0.49 when R 12 is a methyl group),- CF 3 ( ⁇ p: +0.51), -SO 2 R 12 (+0.69 when ⁇ p: R 12 is a methyl group), -NO 2 ( ⁇ p: +0.81) and the like can be mentioned.
- R 12 is independently a hydrogen atom, an aromatic hydrocarbon group having 6 to 30 substituted or unsubstituted ring-forming atoms, a heterocyclic group having 5 to 30 substituted or unsubstituted ring-forming atoms, and substituted or absent. It represents a substituted alkyl group having 1 to 30 carbon atoms and a substituted or unsubstituted cycloalkyl group having 1 to 30 carbon atoms. Specific examples of each of these groups include the same examples as described above.
- Preferred electron-withdrawing groups include fluorine, a fluorine-containing aryl group, a fluorine-containing heteroaryl group, a fluorine-containing alkyl group, a substituted or unsubstituted acyl group, a substituted or unsubstituted ester group, a substituted or unsubstituted amide group, and the like.
- Substituted or unsubstituted sulfonyl or cyano groups can be mentioned. This is because they are difficult to decompose chemically.
- More preferable electron-withdrawing groups include a fluorine-containing alkyl group, a substituted or unsubstituted acyl group, a substituted or unsubstituted ester group or a cyano group. This is because it leads to the effect of preventing concentration quenching and improving the emission quantum yield. Particularly preferred are substituted or unsubstituted ester groups.
- the compound represented by the general formula (1) can be produced, for example, by the method described in JP-A-8-509471 and JP-A-2000-208262. That is, the desired pyrromethene-based metal complex can be obtained by reacting the pyrromethene compound and the metal salt in the presence of a base.
- a method of forming a carbon-carbon bond by using a coupling reaction between a halogenated derivative and a boronic acid or a boronic acid esterified derivative can be mentioned, but the present invention is limited to this. It is not something that is done.
- a method of forming a carbon-nitrogen bond by using a coupling reaction between a halogenated derivative and an amine or carbazole derivative under a metal catalyst such as palladium is used. However, it is not limited to this.
- the color conversion composition of the present invention may appropriately contain other compounds in addition to the compound represented by the general formula (1), if necessary.
- an assist dopant such as rubrene may be contained in order to increase the energy transfer efficiency from the excitation light to the compound represented by the general formula (1).
- the above-mentioned organic light emitting material or a known light emitting material such as an inorganic phosphor, a fluorescent pigment, a fluorescent dye, or a quantum dot is used. May be contained.
- organic light emitting material other than the compound represented by the general formula (1) is shown below, but the present invention is not particularly limited thereto.
- the color conversion composition of the present invention is a luminescent material exhibiting light emission observed in a region having a peak wavelength of 500 nm or more and 580 nm or less by using excitation light having a wavelength in the range of 430 nm or more and 500 nm or less (hereinafter, “light emitting material (a)). It is preferable to include).
- the emission observed in the region where the peak wavelength is 500 nm or more and 580 nm or less is referred to as “green emission”.
- the larger the energy of the excitation light the more likely it is to cause decomposition of the material.
- the excitation light having a wavelength in the range of 430 nm or more and 500 nm or less has a relatively small excitation energy, it causes decomposition of the light emitting material in the color conversion composition. It is possible to obtain green light emission with good color purity.
- the color conversion composition of the present invention comprises (a) a light emitting material exhibiting light emission having a peak wavelength of 500 nm or more and 580 nm or less by using excitation light having a wavelength in the range of 430 nm or more and 500 nm or less, and (b) a light emitting material having a wavelength of 430 nm or more and 500 nm or less.
- the emission observed in the region where the peak wavelength is 580 nm or more and 750 nm or less is referred to as “red emission”.
- the white LED which is a combination of a blue LED and a yellow phosphor, which is currently the mainstream
- the light emitting characteristics in the green region and the red region are particularly improved, so that the color rendering property is improved and the white color is preferable. It becomes a light source.
- Examples of the luminescent material (a) include coumarin derivatives such as coumarin 6, coumarin 7, and coumarin 153, cyanine derivatives such as indocyanine green, fluorescein, fluorescein isothiocyanate, fluorescein derivatives such as carboxyfluorescein diacetate, and phthalocyanine green.
- Phthalocyanin derivatives perylene derivatives such as diisobutyl-4,10-dicyanoperylene-3,9-dicarboxylate, pyromethene derivatives, stilben derivatives, oxazine derivatives, naphthalimide derivatives, pyrazine derivatives, benzoimidazole derivatives, benzoxazole derivatives, benzothiazole Examples thereof include derivatives, imidazole pyridine derivatives, azole derivatives, compounds having a fused aryl ring such as anthracene, derivatives thereof, aromatic amine derivatives, organic metal complex compounds and the like. Two or more of these may be contained.
- the pyrromethene derivative is particularly suitable because it gives a high fluorescence quantum yield and has good durability of color purity.
- the compound represented by the general formula (1) emits light having high color purity. It is preferable because it shows.
- Examples of the luminescent material (b) include cyanine derivatives such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostillyl) -4H-pyran, and rhodamine B, rhodamine 6G, rhodamine 101, and sulfordamine 101.
- cyanine derivatives such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostillyl) -4H-pyran, and rhodamine B, rhodamine 6G, rhodamine 101, and sulfordamine 101.
- Rhodamine derivatives such as 1-ethyl-2- (4- (p-dimethylaminophenyl) -1,3-butadienyl) -pyridinium-parklorate and other pyridine derivatives, N, N'-bis (2,6-diisopropyl) Perylene derivatives such as phenyl) -1,6,7,12-tetraphenoxyperylene-3,4: 9,10-bisdicarbimide, as well as porphyrin derivatives, pyromethene derivatives, oxazine derivatives, pyrazine derivatives, naphthacene and dibenzodi Examples thereof include compounds having a fused aryl ring such as indenoperylene, derivatives thereof, and organic metal complex compounds. Two or more of these may be contained.
- the pyrromethene derivative is particularly suitable because it gives a high fluorescence quantum yield and has good durability of color purity.
- the compound represented by the general formula (1) emits light having high color purity. It is preferable because it shows.
- a compound that emits delayed fluorescence can also be preferably used as an organic light emitting material.
- Compounds that emit delayed fluorescence are explained on pages 87-103 of "State-of-the-art Organic EL" (edited by Chihaya Adachi and Hiroshi Fujimoto, published by CMC Publishing).
- TADF thermalally activated delayed fluorescence
- FIG. 5 in the document describes the mechanism of delayed fluorescence generation. The emission of delayed fluorescence can be confirmed by transient PL (Photoluminescence) measurement.
- fluorescence emission is emitted from the singlet excited state generated after the light emitting material is photoexcited, and the triplet excited state of the light emitting material generated by intersystem crossing is heat deactivated and fluorescence is extinguished in a room temperature environment. Not released.
- a compound that emits delayed fluorescence is photoexcited and excited to a singlet excited state, and even if a triplet excited state is generated by intersystem intersection, it is quickly converted to a singlet excited state and then fluorescent. Therefore, the triplet excited state, which could not contribute to light emission in a normal fluorescent light emitting material, can also contribute to fluorescent light emission. That is, it is preferable because highly efficient light emission can be obtained.
- the triplet excited state of the compound emitting delayed fluorescence is rapidly converted to the singlet excited state, it is expected that singlet oxygen is less likely to be generated and the durability is improved as a result.
- the triplet excited state of the luminescent material, the generation of singlet oxygen, and the relationship between them and durability will be described in detail in the section ⁇ (C) component: salt of transition metal and organic acid>.
- a compound that emits delayed fluorescence needs to bring the energy level of the singlet excited state and the energy level of the triplet excited state close to each other.
- an electron donor skeleton and an electron acceptor skeleton are combined in the same molecule, and a HOMO (Highest expanded molecular orbital) orbital and a LUMO (Lowest unoccupied molecular orbital) orbital are separated in the molecule. It is effective to let them.
- the electron donor skeleton and the electron acceptor skeleton may be directly bonded or may be bonded via a linking group.
- the linking group is preferably a skeleton containing an aromatic hydrocarbon.
- the electron donor skeleton includes, for example, a skeleton having an amine nitrogen atom.
- a skeleton containing diarylamine or triarylamine a skeleton containing carbazole, a skeleton containing benzocarbazole, a skeleton containing indolocarbazole, a skeleton containing phenoxazine, or a skeleton containing phenothiazine are preferable.
- a skeleton containing carbazole, a skeleton containing benzocarbazole, a skeleton containing indolocarbazole, or a skeleton containing phenoxazine is more preferable, and a skeleton containing carbazole or a skeleton containing phenoxazine is further preferable.
- the electron acceptor skeleton usually includes a skeleton containing a substituent having an electron attractor property.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond a skeleton containing a fluorinated substituent, a skeleton containing a cyano group, a skeleton containing a carbonyl group, a sulfoxide or a di
- a skeleton containing sulfoxide, a skeleton containing a phosphine oxide group, or the like is preferable.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond, a skeleton containing a fluorinated substituent, or a skeleton containing a cyano group is the viewpoint of compound stability. Is even more preferable.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond specifically, a skeleton containing pyridine, pyrimidine, pyrazine, triazine, quinoline, quinoxaline, quinazoline, or phenanthrolin.
- a skeleton containing pyrimidine, triazine, quinoxaline, or quinazoline is more preferable, and a skeleton containing triazine is even more preferable.
- a skeleton containing an arylfluoride group or a fluoroalkyl group is more preferable.
- a fluorinated benzene ring is preferable, and specifically, a skeleton containing fluorobenzene, difluorobenzene, trifluorobenzene, tetrafluorobenzene or pentafluorobenzene is more preferable.
- a skeleton containing a fluoroalkyl group a skeleton containing a benzene ring substituted with a trifluoromethyl group is preferable, and among these, a skeleton containing mono (trifluoromethyl) benzene or bis (trifluoromethyl) benzene is preferable. More preferred.
- a skeleton containing cyanobenzene, dicyanobenzene and tricyanobenzene is more preferable.
- a compound represented by the general formula (11) can be more preferably used in addition to the compound in which the electron donor skeleton and the electron acceptor skeleton are bonded.
- Rings Za, ring Zb, and ring Zc are independently substituted or unsubstituted aryl rings having 6 to 30 ring-forming carbon atoms or substituted or unsubstituted ring-forming carbon atoms having 6 to 30 heteroaryl rings, respectively.
- Z 1 and Z 2 are independently oxygen atoms, NRas (nitrogen atoms having a substituent Ra) or sulfur atoms, respectively.
- Ra When Z 1 is NRa, Ra may or may not be combined with ring Za or ring Zb to form a ring, and when Z 2 is NRa, Ra may or may not be combined with ring Za or ring Zc. They may or may not be combined to form a ring.
- Ra is independently a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or a substituted or unsubstituted alkyl group.
- Rb is independently a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or a substituted or unsubstituted alkyl group, respectively.
- the substituents to be substituted include alkyl groups, cycloalkyl groups, heterocyclic groups, alkenyl groups, cycloalkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, hydroxyl groups and thiol groups.
- Aromatic hydrocarbon rings such as a benzene ring, a naphthalene ring, a phenanthrene ring, a chrysene ring, anthracene, and a pyrene ring are examples of the substituted or unsubstituted aryl ring having 6 to 30 carbon atoms in the rings Za, ring Zb, and ring Zc.
- a benzene ring is preferable from the viewpoint of ensuring solubility.
- Examples of the heteroaryl ring having 5 to 30 carbon atoms include an aromatic heteroaryl ring structure such as a pyridine ring, a quinoline ring, and a phenanthroline ring. From the viewpoint of easy availability of raw materials and difficulty in synthesis, the pyridine ring is used. preferable.
- Ra is preferably a group having 6 to 40 carbon atoms including a substituent. Ra is more preferably a substituted or unsubstituted aryl group.
- the substituted or unsubstituted aryl group include a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted naphthyl group, a substituted or phenanthrenyl group and the like. However, a substituted or unsubstituted phenyl group is more preferable.
- Rb preferably has 6 to 40 carbon atoms including a substituent. More preferably, Rb is a substituted or unsubstituted aryl group or a substituted or unsubstituted alkyl group.
- the compound represented by the general formula (11) is described in, for example, Document Adv. Mater. , 2016, 28, 2777-2781.
- the HOMO orbital and the LUMO orbital are separated by the multiple resonance effect. It is a possible molecule.
- E is a boron atom having a strong electron acceptor property and Z 1
- Both and Z 2 are preferably NRa, which is a group having a strong electron donor property.
- the emission spectrum of the compound represented by the general formula (11) becomes sharper than that of the compound in which the electron donor skeleton and the electron acceptor skeleton are bonded due to the multiple resonance effect, and high color purity emission can be obtained. .. That is, the compound represented by the general formula (11) is preferable because it is advantageous for improving the color gamut of the display. Further, since the compound represented by the general formula (11) has rings Za, ring Zb, and ring Zc around the E atom in the general formula (11) in which the LUMO orbital is mainly localized, the E atom is present. That is, most of the LUMO orbit can be protected. Therefore, it is possible to suppress the electronic interaction due to the collision between the compound represented by the general formula (11) and the component (C). As a result, the effect of improving the durability of the component (C) can be exhibited while maintaining the high fluorescence quantum yield originally possessed by the compound represented by the general formula (4), which is preferable.
- Ra of the general formula (11) is bonded to at least one ring of ring Za, ring Zb, and ring Zc is more preferable. This is because Ra is bonded to at least one ring of ring Za, ring Zb, and ring Zc, so that the steric protection effect of E in the general formula (11) is further enhanced, and the effect of suppressing a decrease in fluorescence quantum yield is suppressed. This is because it can be expected to improve further.
- the compound represented by the general formula (11) is more preferably a compound represented by the general formula (12).
- R 201 to R 217 are independently hydrogen, dear hydrogen, alkyl group, cycloalkyl group, heterocyclic group, alkenyl group, cycloalkenyl group, alkynyl group, aryl group, heteroaryl group, hydroxyl group, thiol group, respectively.
- R 201 to R 217 at least one of R 201 and R 203 is preferably a group containing an electron donor substituent.
- an alkyl group, a cycloalkyl group, a diarylamino group, a triarylamino-containing group, or a carbazole-containing group is preferable, and from the viewpoint of the stability of the compound and the difficulty of synthesis, it is preferable. More preferably, it is a group containing an alkyl group, a cycloalkyl group and a carbazole.
- At least one of R 206 , R 209 , R 212 and R 216 is electron donor. It is also preferable that the group contains a substituent. Preferred substituents in that case are the same as those of R 201 and R 203.
- R 202 is a group containing an electron acceptor substituent.
- the group containing an electron acceptor substituent usually includes a skeleton having an electron attractor property.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond a skeleton containing a fluorinated substituent, a skeleton having a cyano group, a skeleton having a carbonyl group, a sulfoxide or a di
- a skeleton having a sulfoxide, a skeleton having a phosphine oxide group, or the like is preferable.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond, a skeleton containing a fluorinated substituent, or a skeleton having a cyano group is the stable compound. More preferable from the viewpoint.
- a skeleton containing a heteroaryl group having a partial structure in which a carbon atom and a nitrogen atom are bonded by a double bond specifically, a skeleton containing pyridine, pyrimidine, pyrazine, triazine, quinoline, quinoxaline, quinazoline, or phenanthrolin.
- a skeleton containing pyrimidine, triazine, quinoxaline, or quinazoline is more preferable, and a skeleton containing triazine is even more preferable.
- a skeleton containing an arylfluoride group or a fluoroalkyl group is more preferable.
- a fluorinated benzene ring is preferable, and specifically, a skeleton containing fluorobenzene, difluorobenzene, trifluorobenzene, tetrafluorobenzene or pentafluorobenzene is more preferable.
- a skeleton containing a fluoroalkyl group a skeleton containing a benzene ring substituted with a trifluoromethyl group is preferable, and among these, a skeleton containing mono (trifluoromethyl) benzene or bis (trifluoromethyl) benzene is preferable. More preferred.
- a skeleton containing cyanobenzene, dicyanobenzene and tricyanobenzene is more preferable.
- the content of component (A) in the color conversion composition of the present invention can be selected according to the molar extinction coefficient of the compound, the fluorescence quantum yield and the absorption intensity at the excitation wavelength, and the thickness and transmittance of the film to be produced. can.
- the content of the component (A) means the total content of the component (A) when two or more kinds are contained.
- the content of the component (A) is preferably 1.0 ⁇ 10-2 parts by weight to 5 parts by weight with respect to 100 parts by weight of the component (B).
- the color conversion composition contains both the light emitting material (a) exhibiting green light emission and the light emitting material (b) exhibiting red light emission, a part of the green light emission is converted into red light emission.
- the content w a of the light-emitting material (a) is, w a ⁇ w is preferably a relationship of b, the content ratio w a of each material : w b is 200: 1 to 3: 1 is preferred.
- w a and w b are weight percent of the weight of the component (B).
- binder resin a material that forms a continuous phase and is excellent in molding processability, transparency, heat resistance, and the like is preferable.
- a photocurable resist material having a reactive vinyl group such as acrylic, methacrylic, vinyl polysilicate, polyimide, and ring rubber, epoxy resin, and silicone resin (organopolysiloxane such as silicone rubber and silicone gel).
- urea resin fluororesin, polycarbonate resin, acrylic resin, methacrylic resin, polyimide resin, cyclic olefin, polyethylene terephthalate resin, polypropylene resin, polystyrene resin, urethane resin, melamine resin, polyvinyl resin, Polyimide resin, phenol resin, polyvinyl alcohol resin, cellulose resin, aliphatic ester resin, aromatic ester resin, aliphatic polyolefin resin, aromatic polyolefin resin, hydrogenated styrene resin, resin having fluorene skeleton in repeating unit, Examples thereof include these copolymers. Two or more of these may be contained.
- epoxy resin, silicone resin, acrylic resin, and ester resin are preferable from the viewpoint of transparency, and acrylic resin and ester resin are more preferably used from the viewpoint of heat resistance.
- These resins can be obtained, for example, by copolymerizing each raw material monomer in the presence of a polymerization initiator. Moreover, a commercially available product can also be used.
- the silicone resin may be either a thermosetting silicone resin or a thermoplastic silicone resin.
- the thermosetting silicone resin cures at room temperature or a temperature of 50 to 200 ° C., and is excellent in transparency, heat resistance, and adhesiveness.
- a commercially available silicone resin for example, a silicone encapsulant for general LED applications. Specific examples thereof include OE-6630A / B and OE-6336A / B manufactured by Dow Corning Toray Specialty Materials Co., Ltd., and SCR-1012A / B and SCR-1016A / B manufactured by Shin-Etsu Chemical Co., Ltd. And so on.
- the thermoplastic silicone resin include commercially available RSN series such as RSN-0805 and RSN-0217 manufactured by Dow Corning Toray Specialty Materials Co., Ltd.
- the binder resin examples include thermosetting resins, photocurable resins, and thermoplastic resins.
- the thermoplastic resin has few reactive functional groups, so that it is difficult to inhibit the action of the component (C), that is, the effect of the component (C) in the binder resin can be more effectively exhibited. Therefore, it is preferable.
- the glass transition temperature (Tg) of the thermoplastic resin is preferably 50 to 200 ° C., more preferably 100 to 160 ° C. from the viewpoint of further improving the durability of chromaticity.
- the glass transition temperature of the thermoplastic resin is measured by a commercially available measuring instrument (for example, a differential scanning calorimeter manufactured by Seiko Electronics Inc. (trade name: DSC6220, heating rate: 0.5 ° C./min)). Can be done.
- the singlet oxygen quencher is a compound that traps and inactivates singlet oxygen formed by activating oxygen molecules in the ground state with excitation energy.
- the coexistence of the singlet oxygen quencher in the composition can prevent the luminescent material from being oxidatively deteriorated by the singlet oxygen.
- singlet oxygen is generated by the exchange of electrons and energy between the triplet excited state of the light emitting material and the triplet oxygen molecule in the ground state.
- the mechanism of its occurrence is considered as follows. First, the singlet light emitting material in the ground state becomes the singlet light emitting material in the excited state by photoexcitation, and further, the singlet light emitting material in the excited state becomes the triplet light emitting material in the excited state by intersystem crossing.
- the transition from the generated excited state triplet oxygen material to the ground state singlet oxygen material is a spin-forbidden transition, so the transition probability is usually low, but when the ground state singlet oxygen coexists, the ground state
- the spin ban is lifted by the excitation of the excited state singlet oxygen from the state triplet oxygen, and the triplet luminescent material can be rapidly deactivated into the ground state singlet luminescent material.
- This mechanism is called a Dexter mechanism (electron exchange mechanism). In order for the Dexter mechanism to proceed, it is necessary to exchange electrons through the overlap of wave functions between molecules, so an energy donor molecule (in this case, an excited triplet dye) and an energy acceptor molecule (in this case). It is considered that the triplet oxygen in the ground state needs to collide directly.
- the deactivation mechanism of singlet oxygen by the singlet oxygen quencher Since the transition from the excited state singlet oxygen to the ground state triplet oxygen is a spin-forbidden transition, the transition probability is usually low.
- the spin forbidden transition is solved by the ground state singlet oxygen quencher being excited to the excited triplet quencher, similar to the mechanism of singlet oxygen generation.
- Singlet oxygen can be rapidly deactivated to the triplet oxygen in the ground state. What is important here is that the deactivation of singlet oxygen also proceeds by the Dexter mechanism.
- the singlet oxygen quencher molecule is preferably a molecule having a small steric disorder. Further, in order to act as a singlet oxygen quencher, it is preferable to be excited with an energy smaller than the energy of singlet oxygen. That is, the present invention has found that the organic acid salt of a specific transition metal acts as a singlet oxygen quencher and improves the durability of the chromaticity of the light emitting material.
- the transition metal is one or more selected from Sc, V, Mn, Fe, Co, Cu, Y, Zr, Mo, Ag and lanthanoid, and salt is used as a cation with the anion of the organic acid.
- the organic acid salts of these transition metals are considered to act effectively as a singlet oxygen quencher because they can efficiently absorb the excitation energy of singlet oxygen.
- the durability of chromaticity is insufficient.
- Mn, Fe, Co, Cu, Ag, Ce, Pr, Nd, Sm, Eu, Gd, Ho, Er, Tm are preferable, and Mn, Cu, Ag, Nd, Sm, Eu, Ho Is more preferable, and Cu, Nd, and Sm are even more preferable.
- the acid value of Cu is preferably +2, and the oxidation numbers of Nd and Sm are preferably +3.
- the color conversion composition of the present invention may contain two or more kinds of the component (C), and the combination thereof is not particularly limited.
- singlet oxygen inactivated by an organic acid salt containing Sc, V, Mn, Fe, Co, Cu, Y, Zr, Mo or Ag and singlet oxygen inactivated by an organic acid salt containing a lanthanoid.
- an organic acid salt containing a lanthanoid Is considered to have different energy states.
- energy states of singlet oxygen There are two types of energy states of singlet oxygen.
- One is two existing [pi * 2p orbital of a ⁇ state where electrons are occupied by one each, and one, the only one of the two existing [pi * 2p orbital two electrons Occupies the other ⁇ * 2p orbital, which is an empty orbital.
- the energy is lower in the ⁇ state than in the ⁇ state.
- Organic acid salts containing Sc, V, Mn, Fe, Co, Cu, Y, Zr, Mo or Ag inactivate singlet oxygen in the ⁇ state, and organic acid salts containing lanthanoids deactivate singlet oxygen in the ⁇ state. It is thought to deactivate.
- the color conversion composition of the present invention contains two or more kinds of (C) components, it contains at least the first (C) component and the second (C) component, and constitutes the first (C) component.
- the transition metal to be formed is selected from the group consisting of Sc, V, Mn, Fe, Co, Cu, Y, Zr, Mo and Ag, and the transition metal constituting the second component (C) is a lanthanoid.
- the transition metal constituting the first component (C) is Cu and the transition metal constituting the second component (C) is Nd or Sm.
- the content of the first component (C) is w1 and the content of the second component (C) is w2, it is preferable that w1 ⁇ w2 is satisfied. As a result, both the singlet oxygen in the ⁇ state and the singlet oxygen in the ⁇ state can be efficiently deactivated.
- the above-mentioned transition metal is contained as an organic acid salt. Since the organic acid salt has excellent compatibility with the binder resin, the singlet oxygen citrate is dispersed in the binder resin as a single molecule, and it becomes easy to come into contact with the singlet oxygen. At this time, the transition metal and the organic acid may exist as salts in the binder resin, or may be dissociated into metal ions and organic acid ions. Therefore, singlet oxygen can be trapped more effectively and the durability of chromaticity can be improved.
- the inorganic acid salt of transition metal ions has a large polar difference with the binder resin and is difficult to be compatible with each other, so that the contact probability with singlet oxygen is low and the durability of chromaticity is insufficient.
- organic acid examples include carboxylic acids, thiocarboxylic acids, dithiocarboxylic acids, sulfonic acids, sulfinic acids, sulfonic acids, sulfamic acids, phenols, alcohols, thiols, carbamates, thiocarbamic acids, dithiocarbamic acids, acetylacetones and other diketones.
- examples thereof include phosphoric acid, thiophosphate and dithiophosphate. Two or more of these may be used.
- carboxylic acid, sulfonic acid, dithiocarbamic acid and dithiophosphate are preferable, carboxylic acid, sulfonic acid and diketone are more preferable, and carboxylic acid and diketone are further preferable.
- carboxylic acid examples include formic acid, acetic acid, propionic acid, 2-ethylhexanoic acid, octanoic acid, caprylic acid, benzoic acid and the like. Of these, 2-ethylhexanoic acid is preferable.
- sulfonic acid examples include benzenesulfonic acid, p-toluenesulfonic acid, methanesulfonic acid, camphorsulfonic acid, bis (2-ethylhexyl) succinate sulfonic acid and the like. Among these, bis (2-ethylhexyl) succinate sulfonic acid is preferable.
- dithiocarbamic acid examples include dimethyldithiocarbamic acid, diethyldithiocarbamic acid, dibutyldithiocarbamic acid, dibenzyldithiocarbamic acid, hexamethylenedithiocarbamic acid, pyrrolidine-N-dithiocarbamic acid and the like.
- dithiophosphate examples include O, O'-diethyldithiophosphate.
- diketone examples include ⁇ -diketone such as diacetyl, ⁇ -diketone such as acetylacetone, and ⁇ -diketone such as 2,5-hexanedione. Among these, ⁇ -diketone is preferable.
- the component (C) in order for the component (C) to work well as a singlet oxygen quencher, it is preferable that the component (C) is uniformly dispersed in the binder resin of the component (B) without agglutination.
- the organic acid contains an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a thiol group, an alkoxy group, an alkylthio group and an aryl ether group.
- a substituted or unsubstituted alkyl group a substituted or unsubstituted cycloalkyl group, and a substituted or unsubstituted aryl group, and the substituted or unsubstituted alkyl group and / or substituted or It is more preferred to have an unsubstituted cycloalkyl group.
- the organic acid preferably has an appropriately bulky substituent in terms of suppressing a decrease in the quantum yield of the component (A) due to the component (C). Since the color conversion composition according to the present invention contains the component (A) and the component (C) in the same layer, collision of the component (A) and the component (C) may occur due to thermal diffusion. When the component (C) and the luminescent material in the excited state collide, the excitation energy of the luminescent material is transferred to the molecule of the component (C), the luminescent material in the excited state is deactivated, and the quantum yield of the component (A) is increased. It may decrease.
- the number of carbon atoms of the substituted or unsubstituted alkyl group of the organic acid is preferably 2 or more, more preferably 4 or more, further preferably 6 or more, and particularly preferably 7 or more.
- alkyl group contained in the organic acid examples include an ethyl group, a butyl group, a hexyl group, a 2-ethylhexyl group, an octyl group and the like.
- the carbon number of the substituted or unsubstituted cycloalkyl group contained in the organic acid is preferably 6 or more and 20 or less, the number of carbon atoms is 6 or more and 20 or less, and the number of carbon atoms forming the ring structure of the cycloalkyl group is formed. Is more preferably 6 or more.
- cycloalkyl group contained in the organic acid examples include a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a norbornyl group, an adamantyl group and the like.
- the substituted or unsubstituted aryl group of the organic acid preferably has 6 or more and 40 or less carbon atoms.
- Specific examples of the aryl group contained in the organic acid include a phenyl group and a naphthyl group.
- a substituent having 4 or more carbon atoms is preferable, and a butyl group, a cyclohexyl group, a phenyl group, and a naphthyl group are preferable.
- organic acid ethyl caproic acid and its derivatives, acids containing an ethylhexyl group, and diketone are preferable.
- the ⁇ -diketone has a cycloalkyl group, and it is more preferable that the ⁇ -diketone has at least two cycloalkyl groups.
- the ⁇ -diketone has a cycloalkyl group, it is preferably selected from the group consisting of a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a norbornyl group and an adamantyl group.
- the content of component (C) in the color conversion composition of the present invention can be selected according to the molar extinction coefficient of the compound, the fluorescence quantum yield and the absorption intensity at the excitation wavelength, and the thickness and transmittance of the film to be produced. can.
- the content of the component (C) means the total content of the component (C) when two or more kinds are contained.
- the content of the component (C) is preferably 1.0 ⁇ 10-5 parts by weight or more, preferably 1.0 ⁇ 10 with respect to 100 parts by weight of the component (B), from the viewpoint of further improving the durability of the chromaticity. -4 parts by weight or more is more preferable, and 1.0 ⁇ 10 -3 parts by weight or more is further preferable.
- the content of the component (C) is preferably 1 part by weight or less, more preferably 1.0 ⁇ 10 -1 part by weight or less, based on 100 parts by weight of the component (B), from the viewpoint of improving the quantum yield. It is preferably 1.0 ⁇ 10-2 parts by weight or less, more preferably 1.0 ⁇ 10-2 parts by weight or less.
- the color conversion composition of the present invention is a light-resistant stabilizer such as a filler, an antioxidant, a processing and heat stabilizer, and an ultraviolet absorber.
- a light-resistant stabilizer such as a filler, an antioxidant, a processing and heat stabilizer, and an ultraviolet absorber.
- Dispersants and leveling agents for stabilizing coating films, scattering agents, plasticizers, cross-linking agents such as epoxy compounds, curing agents such as amines, acid anhydrides and imidazoles, pigments, silane cups as film surface modifiers It may contain an additive such as an adhesion auxiliary such as a ring agent.
- filler examples include fine particles such as fumed silica, glass powder and quartz powder, titanium oxide, zirconia oxide, barium titanate, zinc oxide and silicone fine particles. Two or more of these may be contained.
- antioxidants examples include phenolic antioxidants such as 2,6-di-tert-butyl-p-cresol and 2,6-di-tert-butyl-4-ethylphenol. Two or more of these may be contained.
- processing and heat stabilizer examples include phosphorus-based stabilizers such as tributylphosphine, tricyclohexylphosphite, triethylphosphine, and diphenylbutylphosphine. Two or more of these may be contained.
- phosphorus-based stabilizers such as tributylphosphine, tricyclohexylphosphite, triethylphosphine, and diphenylbutylphosphine. Two or more of these may be contained.
- Examples of the light resistance stabilizer include 2- (5-methyl-2-hydroxyphenyl) benzotriazole and 2- [2-hydroxy-3,5-bis ( ⁇ , ⁇ -dimethylbenzyl) phenyl] -2H-.
- Examples thereof include benzotriazoles such as benzotriazole. Two or more of these may be contained.
- the content of these additives in the color conversion composition of the present invention shall be set according to the molar extinction coefficient of the compound, the fluorescence quantum yield and the absorption intensity at the excitation wavelength, and the thickness and transmittance of the film to be produced. Can be done.
- the content of the additive is preferably 1.0 ⁇ 10 -1 part by weight or more and 10 parts by weight or less with respect to 100 parts by weight of the component (B).
- the color conversion composition of the present invention may further contain a solvent.
- a solvent that can adjust the viscosity of the resin in a fluid state and does not excessively affect the light emission and durability of the luminescent substance is preferable.
- ethyl acetate is preferably used because it does not affect the deterioration of the compound represented by the general formula (1) and the amount of residual solvent after drying is small.
- the amount of residual solvent after drying in the color conversion layer containing the color conversion composition of the present invention or a cured product thereof is preferably 3.0% by weight or less from the viewpoint of further improving the durability of the color conversion film. , 1.0% by weight or less, more preferably 0.5% by weight or less.
- the amount of the residual solvent is 3.0% by weight or less, the collision probability between the component (C) and the singlet oxygen is suppressed by suppressing the solvation of the component (C) by the solvent remaining in the color conversion layer. Can be reduced. As a result, the singlet oxygen quenching effect due to the component (C) can be improved, and the durability of the color conversion film can be further improved, which is preferable.
- the residual solvent amount is preferably 0.01% by weight or more, more preferably 0.05% by weight or more, and 0.1% by weight. The above is more preferable.
- the amount of the residual solvent is 0.01% by weight or more, the proximity of the component (A) and the component (C) due to the intermolecular force can be suppressed, and the probability of the component (A) and the component (C) colliding with each other can be reduced. can. As a result, it is possible to suppress a decrease in the quantum yield of the color conversion sheet due to the transfer of the excitation energy of the component (A) to the molecule of the component (C).
- the amount of residual solvent in the color conversion layer can be measured by a gas chromatography method.
- 20 mg of the composition constituting the color conversion layer is weighed and dissolved in 2 mL of an organic solvent to prepare a sample for measuring the amount of residual solvent.
- an organic solvent different from the organic solvent remaining in the color conversion layer is used.
- xylene, N-methylpyrrolidone (NMP), anisole and the like can be preferably used.
- the organic solvent remaining in the color conversion layer can be identified by GC / MS measurement.
- Shimadzu Corporation Shimadzu Corporation (GC-2010) can be used for measurement under the following conditions.
- Detector FID Column used: CP-Select 624 CB Detector temperature: 280 ° C Carrier gas: He Carrier gas: Flow rate 6 mL / min Heating conditions: After holding at 40 ° C. for 4 minutes, the temperature is raised to 260 ° C. at a heating rate of 8 ° C./min, and then held for 16 minutes.
- Color conversion is performed by mixing the above-mentioned components (A) to (C), and if necessary, additives, solvents, etc. so as to have a predetermined composition, and then uniformly mixing or kneading them using a stirrer / kneader.
- the composition can be obtained.
- the stirring / kneading machine include a homogenizer, a self-revolving stirrer, a three-roller, a ball mill, a planetary ball mill, and a bead mill.
- Defoaming under vacuum or reduced pressure conditions is also preferably performed after mixing or dispersion, or in the process of mixing or dispersion. Further, a specific component may be mixed in advance, or a treatment such as aging may be performed. It is also possible to remove the solvent with an evaporator to obtain the desired solid content concentration.
- the color conversion film of the present invention contains the above-mentioned color conversion composition and / or a cured product thereof. It may have a color conversion layer containing the color conversion composition or a cured product thereof, and if necessary, a base material layer or a barrier film, or may have two or more of these layers.
- FIGS. 1 to 4 show schematic cross-sectional views of an example of the color conversion film of the present invention.
- the color conversion film shown in FIG. 1 has a laminated structure of a base material layer 10 and a color conversion layer 11.
- the color conversion film shown in FIG. 2 has a laminated structure in which the color conversion layer 11 is sandwiched between a plurality of base material layers 10.
- the color conversion film shown in FIG. 3 has a laminated structure in which the color conversion layer 11 is sandwiched between a plurality of barrier films 12 and a base material layer 10.
- the color conversion film shown in FIG. 4 has a laminated structure in which a plurality of color conversion layers 11 are sandwiched between a plurality of base material layers 10.
- the thickness of the color conversion film is preferably 30 to 300 ⁇ m.
- the thickness of the color conversion film means the total thickness of all the layers contained in the color conversion film, and is the thickness of the JIS K7130 (1999) plastic-film and sheet-thickness measurement method by mechanical scanning. Measuring method This refers to the film thickness (average film thickness) measured based on the method A.
- Base layer examples of the base material layer include glass and a resin film.
- a plastic film such as polyethylene terephthalate (PET), polyphenylene sulfide, polycarbonate, polypropylene, or polyimide is preferable.
- PET polyethylene terephthalate
- the surface of the base material layer may be mold-released in advance because the film can be easily peeled off.
- the thickness of the base material layer is preferably 38 to 3000 ⁇ m.
- the color conversion layer contains the above-mentioned color conversion composition and a cured product thereof.
- each color conversion layer may be directly laminated or may be laminated via an adhesive layer.
- the thickness of the color conversion layer is preferably 30 to 100 ⁇ m.
- the barrier film preferably suppresses the invasion of oxygen, moisture, heat, etc. into the color conversion layer, and may have two or more barrier films. Barrier films may be provided on both sides of the light conversion layer, or barrier films may be provided on one side.
- the film having gas barrier properties examples include inorganic oxides such as silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, zinc oxide, tin oxide, indium oxide, yttrium oxide and magnesium oxide, silicon nitride, aluminum nitride and nitride.
- Inorganic nitrides such as titanium and silicon carbide, metal oxide thin films and metal nitride thin films with other elements added to them, or polyvinylidene chloride, acrylic resins, silicone resins, melamine resins, urethane resins, Examples thereof include a film containing various resins such as a fluorine-based resin and a polyvinyl alcohol-based resin such as a saponified product of vinyl acetate.
- the film having a barrier function against moisture examples include polyethylene, polypropylene, nylon, polyvinylidene chloride, vinylidene chloride and vinyl chloride, a copolymer of vinylidene chloride and acrylonitrile, a fluororesin, and a saponified product of vinyl acetate.
- films containing various resins such as polyvinylidene-based resins.
- the color conversion film of the present invention has a light diffusing layer, an adhesive layer, an antireflection function, an antiglare function, an antireflection antiglare function, a hard coat function (friction resistance function), an antistatic function, and the like, depending on the required functions. It may further have an auxiliary layer having an antifouling function, an electromagnetic wave shielding function, an infrared ray blocking function, an ultraviolet ray blocking function, a polarizing function, and a toning function.
- the color conversion composition prepared by the above method is applied onto a substrate and dried to form a color conversion layer.
- the binder resin is a thermosetting resin
- the color conversion composition may be applied onto the substrate and then heat-cured to form a color conversion layer.
- the binder resin is a photocurable resin
- the color conversion composition may be formed. After applying the substance on the substrate, it may be photocured to form a color conversion layer.
- Application is reverse roll coater, blade coater, comma coater, slit die coater, direct gravure coater, offset gravure coater, kiss coater, natural roll coater, air knife coater, roll blade coater, toe stream coater, rod coater, wire bar coater, It can be performed by an applicator, a dip coater, a curtain coater, a spin coater, a knife coater, or the like. In order to obtain the film thickness uniformity of the color conversion layer, it is preferable to apply with a slit die coater, a comma coater, or a dip coater.
- the color conversion layer can be dried using a general heating device such as a hot air dryer or an infrared dryer.
- a general heating device such as a hot air dryer or an infrared dryer.
- the heating temperature is preferably 60 to 200 ° C.
- the heating time is preferably 2 minutes to 4 hours. It is also possible to heat and cure in stages by a method such as step curing.
- a hot air oven or the like can be mentioned as a heating device.
- the heating conditions can be selected according to the binder resin.
- the heating temperature is preferably 100 ° C. to 300 ° C.
- the heating time is preferably 1 minute to 2 hours.
- the light irradiation conditions can be selected according to the binder resin.
- the wavelength of the light to be irradiated is preferably 200 nm to 500 nm, and the irradiation amount is preferably 10 mJ / cm 2 to 10 J / cm 2 .
- the light source unit of the present invention includes at least a light source and a color conversion composition or a color conversion film.
- any light source can be used as long as it emits light in a wavelength region in which a mixed luminescent substance such as a compound represented by the general formula (1) can be absorbed.
- any light source such as a hot cathode tube, a cold cathode tube, a fluorescent light source such as an inorganic EL, an organic electroluminescence element light source, an LED light source, an incandescent light source, or sunlight can be used in principle.
- an LED is a suitable light source, and in a display or lighting application, a blue LED having a light source in the range of 430 to 500 nm is a more suitable light source in terms of increasing the color purity of blue light.
- the light source may have one type of emission peak or may have two or more types of emission peaks, but one having one type of emission peak is preferable in order to increase the color purity. It is also possible to use a plurality of light sources having different types of emission peaks in any combination.
- the arrangement of the light source and the color conversion composition is not particularly limited, and the color conversion composition may be directly applied to the light source or separated from the light source.
- the color conversion composition may be applied to a film, glass, or the like.
- the arrangement of the light source and the color conversion film is not particularly limited, and the light source and the color conversion film may be brought into close contact with each other, or the light source and the color conversion film may be separated from each other. It may be in the remote phosphor format. Further, a color filter may be further included for the purpose of increasing the color purity.
- the light source unit in the present invention is useful for various light sources such as space lighting and backlight, and can be specifically used for displays, lighting, interiors, signs, signboards, etc., but is particularly suitable for displays and lighting applications. Used for.
- R 101 to R 103 may be the same or different, respectively, and have a hydrogen atom, an alkyl group, a cycloalkyl group, a heterocyclic group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a thiol group, an alkoxy group, an alkylthio group, and the like.
- a phosphine oxide group, and a fused ring and an aliphatic ring formed between an adjacent substituent are examples of substituent.
- Condition (A) One of R 101 to R 103 is a cycloalkyl group (a) having 6 or more carbon atoms.
- Examples of the cycloalkyl group (a) having 6 or more carbon atoms include the groups exemplified as the substituted or unsubstituted cycloalkyl group in the component (C) described above.
- the cycloalkyl group (b) is preferably a substituted or unsubstituted cycloalkyl group having 3 or more and 20 or less carbon atoms. More preferably, it is a substituted or unsubstituted cycloalkyl group having 3 or more and 20 or less carbon atoms and having 3 or more carbon atoms forming the ring structure of the cycloalkyl group. It is more preferably a substituted or unsubstituted cycloalkyl group having 5 or more and 20 or less carbon atoms and having 5 or more carbon atoms forming the ring structure of the cycloalkyl group. Even more preferably, it is a substituted or unsubstituted cycloalkyl group having 6 or more and 20 or less carbon atoms and having 6 or more carbon atoms forming the ring structure of the cycloalkyl group.
- the compound represented by the general formula (3) satisfies the conditions (A) and (B), the oxidation of R 101 to R 103 by oxygen can be suppressed, so that the general formula (3) for singlet oxygen can be suppressed. ), The stability of the compound is further improved, and the function as a singlet oxygen quencher is further improved. Since a cycloalkyl group having 6 or more carbon atoms is bulky, the metal can be sterically protected by introducing a cycloalkyl group having 6 or more carbon atoms into at least one of R 101 to R 103.
- the metal M contained in the general formula (3) can be sufficiently protected.
- the probability of collision with the light emitting material in the color conversion layer can be reduced, so that the decrease in the quantum yield of the light emitting material is suppressed, and the durability of the chromaticity of the color conversion film is further improved.
- the compound represented by the general formula (3) may be a hydrate.
- n is an integer of 2-4.
- M is preferably Cu
- V O, Mn, or Ni
- M is preferably V or Mn.
- M is preferably Zr.
- the compound represented by the general formula (3) Since the compound represented by the general formula (3) has a highly flat skeleton, it can be used as a catalyst or a singlet oxygen quencher. Among them, the compound represented by the general formula (3) is preferably used as a singlet oxygen quencher in a color conversion film because it can efficiently absorb the excitation energy of singlet oxygen.
- ⁇ Durability evaluation of chromaticity> A current of 30 mA is passed through a light emitting device equipped with a color conversion film and a blue LED (manufactured by USHIO EPITEX; model number SMBB450H-1100, emission peak wavelength: 450 nm) produced in each Example and Comparative Example to light the blue LED.
- the initial chromaticity (x, y) was measured using a spectral emission luminance meter (CS-1000, manufactured by Konica Minolta). The distance between each color conversion film and the blue LED element was set to 3 cm.
- the chromaticity (x, y) is measured in the same manner, and the deviation ( ⁇ x, ⁇ y) from the initial chromaticity is calculated. By doing so, the durability of the chromaticity of the color conversion film was evaluated.
- the amount of residual solvent in the green color conversion layer and the red color conversion layer was measured by the following procedure.
- the green color conversion layer or the red color conversion layer formed on the polyester film "Lumirror” (registered trademark) U48 (manufactured by Toray Industries, Inc., thickness 50 ⁇ m) was peeled off from the polyester film, and only the color conversion layer was weighed at 20 mg. Next, it was dissolved in 2 mL of NMP to prepare a sample for measuring the amount of residual solvent.
- Shimadzu Corporation GC-2010 was used for measurement under the following conditions.
- Detector FID Column used: CP-Select 624 CB Detector temperature: 280 ° C Carrier gas: He Carrier gas flow rate: 6 mL / min Heating conditions: After holding at 40 ° C. for 4 minutes, the temperature is raised to 260 ° C. at a heating rate of 8 ° C./min, and then held for 16 minutes.
- G-2 Organic light emitting material other than the compound represented by the general formula (1) (coumarin 6 manufactured by SIGMA-ALDRICH)
- G-3 Quantum dots manufactured by SIGMA-ALDRICH (product number 735777)
- R-2 Organic light emitting material other than the compound represented by the general formula (1) (BASF's "Lumogen” (registered trademark) FRed 300)
- R-3 Sigma-ALDRICH quantum dots (product number 753882)
- Q-1 to 15 are salts composed of a combination of a transition metal ion and an anion of an organic acid shown in Table 1.
- X-1, X-2, and X-3 are the compounds shown below.
- ⁇ Resin> As the binder resin for the color conversion layer, polymethylmethacrylate resin BR-85 (manufactured by Mitsubishi Chemical Corporation) (glass transition temperature: 105 ° C.) was used.
- Polyester resin "Vylon” (registered trademark) 630 (Toyobo Co., Ltd.) was used as the resin for the adhesive layer.
- Example 1 After mixing 0.40 parts by weight of compound G-1, 0.003 parts by weight of compound Q-4, and 300 parts by weight of ethyl acetate as a solvent with 100 parts by weight of the binder resin (BR-85), a planetary formula is used.
- a green color conversion composition as a resin solution for producing a green color conversion layer by stirring and defoaming at 1000 rpm for 20 minutes using a stirring / defoaming device “Mazelstar”) registered trademark) KK-400 (manufactured by Kurabo Co., Ltd.).
- the green color conversion composition was applied onto a polyester film "Lumirror” (registered trademark) U48 (manufactured by Toray Industries, Inc., thickness 50 ⁇ m) using a slit die coater, and heated and dried at 120 ° C. for 20 minutes. A green color conversion layer having an average film thickness of 20 ⁇ m was formed.
- the red color conversion composition is applied to the PET substrate layer side of the light diffusion film "Chemical Matte" 125 PW (manufactured by Kimoto Co., Ltd., thickness 138 ⁇ m) using a slit die coater, and is applied at 120 ° C. for 20 minutes. During heating, it was dried to form a red color conversion layer having an average thickness of 20 ⁇ m.
- the resin composition for the adhesive layer is applied onto the red color conversion layer formed on the PET base material layer side of the light diffusion film "Chemical Mat” 125 PW (manufactured by Kimoto Co., Ltd., thickness 138 ⁇ m).
- the film was applied to the film, heated at 120 ° C. for 20 minutes, and dried to form an adhesive layer having an average film thickness of 10 ⁇ m.
- Examples 2 to 5, 16, 25, 34, 43, 54, Comparative Examples 1 to 7 A color conversion film was produced by the same operation as in Example 1 except that the types of the components (C) and the amounts of the components added were as shown in Table 2. In Comparative Example 1, the component (C) was not added. Further, in Comparative Examples 2 to 7, the component (C) was not added, and Q-1, Q-2, Q-3, X-1, X-2, and X-3 were added as other additives, respectively. The fluorescence quantum yield of the color conversion films produced in each Example and Comparative Example was measured and the durability of chromaticity was evaluated. The results are shown in Table 2. The results of Example 1 are also summarized in Table 2.
- Examples 6 to 13, 17 to 24, 26 to 33, 35 to 42, 44 to 51, 55 to 76 A color conversion film was produced by the same operation as in Example 1 except that the types of the components (C) and the amounts of the components added were as shown in Tables 3 to 10.
- the fluorescence quantum yield of the color conversion films produced in each Example and Comparative Example was measured and the durability of chromaticity was evaluated. The results are shown in Tables 3-10.
- the results of Examples 3, 16, 25, 34, 43 and 54 are also reprinted in Table 3, Table 4, Table 5, Table 6, Table 7 and Table 8, respectively.
- the durability is improved as the amount of the component (C) added is larger, but the effect of improving the durability does not change when the amount added is 1 part by weight or more. Further, the smaller the amount added, the higher the fluorescence quantum yield tended to be. Furthermore, it was also found that when the transition metal constituting the component (C) is a lanthanoid, the quantum yield does not easily decrease even if the addition amount is increased.
- Examples 14, 15, 52, 53, 77, Comparative Examples 8, 9 A color conversion film was produced by the same operation as in Example 1 except that the types of the components (A), the types of the components (C), and the amount of the components added were as shown in Table 11.
- the fluorescence quantum yield of the color conversion film produced by each Example and Comparative Example was measured and the durability of the chromaticity was evaluated. The results are shown in Table 11.
- the results of Examples 3 and 43 are also shown in Table 11. Comparing Examples 14 to 15 with Comparative Examples 8 to 9, it can be seen that the chromaticity change ( ⁇ x, ⁇ y) is small and the durability is improved. Further, when Examples 14 to 15 were compared with Example 3, it was found that the durability was further improved when the compound represented by the general formula (1) was used.
- Example 78 to 83 A color conversion film was produced by the same operation as in Example 1 except that the type of the component (C) and the amount of the component added were as shown in Table 12. The fluorescence quantum yield of the color conversion films produced in each Example and Comparative Example was measured and the durability of chromaticity was evaluated. The results are shown in Table 12. The results of Example 21 are also reprinted.
- the transition metal containing at least the first component (C) and the second component (C) and constituting the first component (C) is a lanthanoid, and the first (C) It was found that the durability of Examples 79 to 82 in which the content w1 of the component and the content w2 of the second component (C) satisfy the relationship of w1 ⁇ w2 was further improved.
- Example 84 to 90 A color conversion film was produced by the same operation as in Example 21 except that the drying temperature and the drying time at the time of producing the color conversion layer were as shown in Table 13. The amount of residual solvent in the color conversion films produced in each Example and Comparative Example was measured, the fluorescence quantum yield of the color conversion film was measured, and the durability of chromaticity was evaluated. The results are shown in Table 13. The results of Example 21 are also reprinted. It was found that the smaller the amount of residual solvent in the color conversion layer, the better the durability. It was also found that the fluorescence quantum yield decreased when the amount of the residual solvent in the color conversion layer was 0.02% by weight or less.
- Example 91 to 95 A color conversion film was produced by the same operation as in Example 1 except that the type of the component (A) and the amount added thereof and the type of the component (C) and the amount added thereof were as shown in Table 14.
- the compound of the component (A) used is shown below.
- the fluorescence quantum yield of the color conversion film produced by each Example and Comparative Example was measured and the durability of the chromaticity was evaluated. The results are shown in Table 14. From these examples, it can be seen that there is a difference in the obtained fluorescence quantum yields while maintaining the effect of improving the durability by adding Q-9.
- Example 93 in which G-7 represented by the general formula (11) was used as the compound emitting delayed fluorescence, the fluorescence quantum yield was further improved, and G-represented by the general formula (12). 8.
- Examples 94 and 95 using G-9 the fluorescence quantum yield is further improved. This reflects the result that the electronic interaction with the component (C) is suppressed by the steric protection effect of the boron atom, which is the central atom, described in the specification.
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Abstract
Description
(A)成分:発光材料
(B)成分:バインダー樹脂
(C)成分:Sc、V、Mn、Fe、Co、Cu、Y、Zr、Mo、Agおよびランタノイドからなる群より選ばれる少なくとも1種の遷移金属と有機酸との塩
本発明の色変換組成物は、少なくとも1種の発光材料を含む。ここで、本発明における発光材料とは、何らかの光が照射されたときに、その光とは異なる波長の光を発する材料のことをいう。
ナフタレン、アントラセン、フェナンスレン、ピレン、クリセン、ナフタセン、トリフェニレン、ペリレン、フルオランテン、フルオレン、インデン等の縮合アリール環を有する化合物やその誘導体;
フラン、ピロール、チオフェン、シロール、9-シラフルオレン、9,9’-スピロビシラフルオレン、ベンゾチオフェン、ベンゾフラン、インドール、ジベンゾチオフェン、ジベンゾフラン、イミダゾピリジン、フェナントロリン、ピリジン、ピラジン、ナフチリジン、キノキサリン、ピロロピリジン等のヘテロアリール環を有する化合物やその誘導体;
ボラン誘導体;
1,4-ジスチリルベンゼン、4,4’-ビス(2-(4-ジフェニルアミノフェニル)エテニル)ビフェニル、4,4’-ビス(N-(スチルベン-4-イル)-N-フェニルアミノ)スチルベン等のスチルベン誘導体;
芳香族アセチレン誘導体、テトラフェニルブタジエン誘導体、アルダジン誘導体、ピロメテン誘導体、ジケトピロロ[3,4-c]ピロール誘導体;
クマリン6、クマリン7、クマリン153などのクマリン誘導体;
イミダゾール、チアゾール、チアジアゾール、カルバゾール、オキサゾール、オキサジアゾール、トリアゾールなどのアゾール誘導体およびその金属錯体;
インドシアニングリーン等のシアニン系化合物;
フルオレセイン・エオシン・ローダミン等のキサンテン系化合物やチオキサンテン系化合物;
ポリフェニレン系化合物、ナフタルイミド誘導体、フタロシアニン誘導体およびその金属錯体、ポルフィリン誘導体およびその金属錯体;
ナイルレッドやナイルブルー等のオキサジン系化合物;
ヘリセン系化合物;
N,N’-ジフェニル-N,N’-ジ(3-メチルフェニル)-4,4’-ジフェニル-1,1’-ジアミン等の芳香族アミン誘導体;および
イリジウム(Ir)、ルテニウム(Ru)、ロジウム(Rh)、パラジウム(Pd)、白金(Pt)、オスミウム(Os)、及びレニウム(Re)等の有機金属錯体化合物;
等が好適なものとして挙げられる。
バインダー樹脂としては、連続相を形成するものであり、成型加工性、透明性、耐熱性等に優れる材料が好ましい。例えば、アクリル系、メタクリル系、ポリケイ皮酸ビニル系、ポリイミド系、環ゴム系等の反応性ビニル基を有する光硬化型レジスト材料、エポキシ樹脂、シリコーン樹脂(シリコーンゴム、シリコーンゲル等のオルガノポリシロキサン硬化物(架橋物)を含む)、ウレア樹脂、フッ素樹脂、ポリカーボネート樹脂、アクリル樹脂、メタクリル樹脂、ポリイミド樹脂、環状オレフィン、ポリエチレンテレフタレート樹脂、ポリプロピレン樹脂、ポリスチレン樹脂、ウレタン樹脂、メラミン樹脂、ポリビニル樹脂、ポリアミド樹脂、フェノール樹脂、ポリビニルアルコール樹脂、セルロース樹脂、脂肪族エステル樹脂、芳香族エステル樹脂、脂肪族ポリオレフィン樹脂、芳香族ポリオレフィン樹脂、水添スチレン系樹脂、繰り返し単位中にフルオレン骨格を有する樹脂や、これらの共重合体などが挙げられる。これらを2種以上含有してもよい。
発光材料の劣化を防ぎ、色度の経時的な変化を抑制して耐久性を向上させるために、特定の遷移金属の有機酸塩を含有することが有効である。これらの化合物は、一重項酸素クエンチャーとしての役割を持つ。
本発明の色変換組成物は、前記(A)成分、(B)成分および(C)成分とともに、充填剤、酸化防止剤、加工および熱安定化剤、紫外線吸収剤等の耐光性安定化剤、塗布膜安定化のための分散剤やレベリング剤、散乱剤、可塑剤、エポキシ化合物などの架橋剤、アミン・酸無水物・イミダゾールなどの硬化剤、顔料、フィルム表面の改質剤としてシランカップリング剤等の接着補助剤等の添加剤を含有してもよい。
本発明の色変換組成物は、さらに溶媒を含有してもよい。溶媒としては、流動状態の樹脂の粘度を調整することができ、発光物質の発光および耐久性に過度な影響を与えないものが好ましい。例えば、水、2-プロパノール、エタノール、トルエン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン、ヘキサン、アセトン、酢酸エチル、酢酸ブチル、テルピネオール、テキサノール、メチルセルソルブ、エチルセルソルブ、ブチルカルビトール、ブチルカルビトールアセテート、1-メトキシ-2-プロパノール、プロピレングリコールモノメチルエーテルアセテート等が挙げられる。これらを2種以上含有してもよい。これらの溶媒の中でも、特に酢酸エチルは、一般式(1)で表される化合物の劣化に影響を与えず、乾燥後の残存溶媒が少ない点で好適に用いられる。
検出器:FID
使用カラム:CP-Select 624 CB
検出器温度:280℃
キャリアガス:He
キャリアガス:流量6mL/min
昇温条件:40℃で4分保持後、8℃/分の昇温速度にて260℃まで昇温、その後16分間保持。
以下に、本発明の色変換組成物の製造方法の一例を説明する。前述した(A)成分~(C)成分、必要に応じて添加剤や溶剤等を所定の組成になるよう混合した後、撹拌・混練機を用いて均質に混合または混練することにより、色変換組成物を得ることができる。撹拌・混練機としては、例えば、ホモジナイザー、自公転型撹拌機、3本ローラー、ボールミル、遊星式ボールミル、ビーズミル等が挙げられる。混合または分散後、もしくは混合または分散の過程において、真空もしくは減圧条件下で脱泡することも好ましく行われる。また、ある特定の成分を事前に混合することや、エージング等の処理をしても構わない。エバポレーターによって溶剤を除去して所望の固形分濃度にすることも可能である。
本発明の色変換フィルムは、前述の色変換組成物および/またはその硬化物を含む。色変換組成物またはその硬化物を含む色変換層と、必要に応じて基材層やバリアフィルムを有してもよく、これらの層を2層以上有してもよい。色変換フィルムの代表的な構造例として、図1~4に、本発明の色変換フィルムの一例の模式断面図を示す。図1に示す色変換フィルムは、基材層10と、色変換層11との積層構造を有する。図2に示す色変換フィルムは、色変換層11が複数の基材層10によって挟まれた積層構造を有する。図3に示す色変換フィルムは、色変換層11を、複数のバリアフィルム12および基材層10によって挟まれた積層構造を有する。図4に示す色変換フィルムは、複数の色変換層11が複数の基材層10によって挟まれた積層構造を有する。
基材層としては、例えば、ガラスや樹脂フィルムなどが挙げられる。樹脂フィルムとしては、ポリエチレンテレフタレート(PET)、ポリフェニレンサルファイド、ポリカーボネート、ポリプロピレン、ポリイミドなどのプラスチックのフィルムが好ましい。フィルムの剥離のし易さから、基材層は、あらかじめ表面が離型処理されていてもよい。基材層の厚みは、38~3000μmが好ましい。
色変換層は、前述の色変換組成物やその硬化物を含む。複数の色変換層を有する場合、各色変換層は直接積層されていてもよいし、粘着層を介して積層されていてもよい。色変換層の厚みは、30~100μmが好ましい。
バリアフィルムとしては、色変換層への酸素、水分、熱などの侵入を抑制するものが好ましく、バリアフィルムを2層以上有してもよい。光変換層の両面にバリアフィルムを有してもよいし、片面にバリアフィルムを有してもよい。
次に、本発明の色変換フィルムの製造方法の一例を説明する。上述した方法で作製した色変換組成物を基材上に塗布し、乾燥することにより、色変換層を形成する。バインダー樹脂が熱硬化性樹脂の場合、色変換組成物を基材上に塗布した後、加熱硬化して色変換層を形成してもよく、バインダー樹脂が光硬化性樹脂の場合、色変換組成物を基材上に塗布した後、光硬化して色変換層を形成してもよい。
本発明の光源ユニットは、少なくとも光源と、色変換組成物または色変換フィルムを含む。
光源の種類は、一般式(1)で表される化合物等の混合する発光物質が吸収可能な波長領域に発光を示すものであればいずれの光源でも用いることができる。例えば、熱陰極管や冷陰極管、無機ELなどの蛍光性光源、有機エレクトロルミネッセンス素子光源、LED光源、白熱光源、あるいは太陽光などいずれの光源でも原理的には利用可能である。これらの中でも、LEDが好適な光源であり、ディスプレイや照明用途では、青色光の色純度を高められる点で、430~500nmの範囲の光源を持つ青色LEDがさらに好適な光源である。
一般式(3)で表される構造を有する化合物について詳細に説明する。
条件(A):R101~R103のうちの1つは、炭素数6以上のシクロアルキル基(a)であり、
条件(B):条件(A)以外のその他の少なくとも1つは、アリール基、シクロアルキル基(b)、シクロアルケニル基、脂肪族複素環基および炭素数5以上のアルキル基の中から選ばれる。
特に一般式(3)において、MがCuであり、かつnは2であることがさらに好ましい。
各実施例および比較例において作製した色変換フィルムおよび青色LED(USHIO EPITEX社製;型番SMBB450H-1100、発光ピーク波長:450nm)を搭載した発光装置に、30mAの電流を流して青色LEDを点灯させ、分光放射輝度計(CS-1000、コニカミノルタ社製)を用いて、初期の色度(x、y)を測定した。なお、各色変換フィルムと青色LED素子との距離は3cmとした。その後、50℃の環境下で青色LED素子からの光を1000時間連続照射したのち、同様にして色度(x、y)を測定し、初期の色度からの偏差(Δx、Δy)を算出することにより、色変換フィルムの色度の耐久性を評価した。
化合物の1H-NMRは、超伝導FTNMR EX-270(日本電子株式会社製)を用い、重クロロホルム溶液にて測定を行った。
各実施例および比較例において作製した色変換フィルムを8mm角に断裁したサンプルを、浜松ホトニクス製の絶対蛍光量子収率測定装置Quantaurus-QYを用いて、励起光450nmにより励起し、蛍光量子収率を測定した。
緑色色変換層中および赤色色変換層中の残存溶媒量は以下の手順により測定した。ポリエステルフィルム“ルミラー”(登録商標)U48(東レ(株)製、厚さ50μm)上に形成した緑色色変換層または赤色色変換層をポリエステルフィルムから剥離し、色変換層のみを20mg秤量した。次に、2mLのNMPに溶解させ残存溶媒量測定用サンプルを調整した。測定機として、島津製作所製(GC-2010)を用い以下の条件にて測定した。
検出器:FID
使用カラム:CP-Select 624 CB
検出器温度:280℃
キャリアガス:He
キャリアガス流量:6mL/min
昇温条件:40℃で4分保持後、8℃/分の昇温速度にて260℃まで昇温、その後16分間保持。
下記の実施例および比較例において、化合物G-1、G-4、R-1、R-4、A-1~A-9は以下に示す化合物である。
G-3:SIGMA-ALDRICH製の量子ドット(製品番号753777)
R-2:一般式(1)で表される化合物以外の有機発光材料(BASF製の“Lumogen”(登録商標)F Red 300)
R-3:SIGMA-ALDRICH製の量子ドット(製品番号753882)
下記の実施例および比較例において、Q-1~15は表1に示す遷移金属イオンと有機酸の陰イオン組み合わせからなる塩である。X-1、X-2、X-3は以下に示す化合物である。
化合物Q-12の合成方法
カリウムtert-ブトキシド(7.4g)、シクロヘキシルメチルケトン(5.0g)と超脱水DMF(40mL)をフラスコに入れ、55℃加熱条件下、シクロヘキサンカルボン酸メチル(3.8g)を少量ずつ添加し、2時間攪拌した。氷浴を用い、内温10℃以下に冷却した後、10質量%塩酸水溶液を数滴加え、反応液を中性にし、水60mLを加え、10分間撹拌した。析出した固体をろ過し、水で固体を洗浄した。得られた反応生成物をシリカゲルクロマトグラフィーにより精製し、化合物A-7を2.3g得た。
色変換層用のバインダー樹脂としてポリメチルメタクリレート樹脂BR-85(三菱ケミカル(株)製)(ガラス転移温度:105℃)を用いた。
バインダー樹脂(BR-85)100重量部に対して、化合物G-1を0.40重量部、化合物Q-4を0.003重量部、溶媒として酢酸エチルを300重量部混合した後、遊星式撹拌・脱泡装置“マゼルスター”)登録商標)KK-400(クラボウ(株)製)を用い、1000rpmで20分間撹拌・脱泡して緑色色変換層作製用樹脂液としての緑色色変換組成物を得た。
(C)成分の種類およびその添加量を表2の通りとしたこと以外は実施例1と同様の操作により色変換フィルムを作製した。なお、比較例1では(C)成分を添加しなかった。また、比較例2~7では(C)成分を添加せず、その他の添加剤としてそれぞれQ-1、Q-2、Q-3、X-1、X-2、X-3を添加した。各実施例および比較例で作製した色変換フィルムの蛍光量子収率測定と色度の耐久性評価を行った。結果を表2に示す。実施例1の結果についても表2にまとめて示した。
(C)成分の種類およびその添加量を表3~10の通りとしたこと以外は実施例1と同様の操作にて色変換フィルムを作製した。各実施例および比較例で作製した色変換フィルムの蛍光量子収率測定と色度の耐久性評価を行った。結果を表3~10に示す。実施例3、16、25、34、43および54の結果もそれぞれ表3、表4、表5、表6、表7および表8に再掲する。
(A)成分の種類、(C)成分の種類およびその添加量を表11の通りとしたこと以外は実施例1と同様の操作にて色変換フィルムを作製した。各実施例および比較例により作製した色変換フィルムの蛍光量子収率測定と色度の耐久性評価を行った。結果を表11に示す。実施例3および43の結果も表11に再掲する。実施例14~15を比較例8~9と比べると、色度変化(Δx、Δy)が小さくなっており、耐久性が改善されていることがわかる。また、実施例14~15を実施例3と比較すると、一般式(1)で表される化合物を用いた場合に、耐久性がより向上することがわかった。実施例52~53を比較例8~9と比べると、色度変化(Δx、Δy)が小さくなっており、耐久性が改善されていることがわかった。また、実施例52~53を実施例43と比較すると、一般式(1)で表される化合物を用いた場合に、耐久性がより向上することがわかった。さらに、実施例3と実施例77を比較すると、一般式(1)で表される化合物において、XがC-R7であり、R7が一般式(2)で表される基である場合、量子収率の低下をより抑制できることがわかった。
(C)成分の種類およびその添加量を表12の通りとしたこと以外は実施例1と同様の操作にて色変換フィルムを作製した。各実施例および比較例で作製した色変換フィルムの蛍光量子収率測定と色度の耐久性評価を行った。結果を表12に示す。実施例21の結果も再掲する。1種の(C)成分のみを用いた実施例21と比較すると、少なくとも第1の(C)成分および第2の(C)成分を含み、第1の(C)成分を構成する遷移金属がSc、V、Mn、Fe、Co、Cu、Y、Zr、MoおよびAgからなる群より選ばれ、かつ第2の(C)成分を構成する遷移金属がランタノイドであり、第1の(C)成分の含有量w1と第2の(C)成分の含有量w2がw1≦w2の関係を満たす実施例79~82は、より耐久性が改善することがわかった。
色変換層作製時の乾燥温度および乾燥時間を表13の通りとしたこと以外は実施例21と同様の操作にて色変換フィルムを作製した。各実施例および比較例で作製した色変換フィルム中の残存溶媒量の測定、色変換フィルムの蛍光量子収率測定および色度の耐久性評価を行った。結果を表13に示す。実施例21の結果も再掲する。色変換層中の残存溶媒量が少ないほど耐久性が改善することがわかった。また色変換層中の残存溶媒量が0.02重量%以下となると蛍光量子収率が低下することがわかった。
(A)成分の種類およびその添加量、(C)成分の種類およびその添加量を表14の通りとしたこと以外は実施例1と同様の操作にて色変換フィルムを作製した。用いた(A)成分の化合物を以下に示す。各実施例および比較例により作製した色変換フィルムの蛍光量子収率測定と色度の耐久性評価を行った。結果を表14に示す。これらの実施例からは、Q-9添加による耐久性向上効果を維持しつつも、得られた蛍光量子収率に差があることが判る。すなわち遅延蛍光を放出する化合物として、一般式(11)で表されるG-7を用いた実施例93では蛍光量子収率がより改善されており、一般式(12)で表されるG-8、G-9を用いた実施例94、95では、蛍光量子収率がさらに向上している。これは明細書中に述べた、中心原子であるホウ素原子の立体保護効果により、(C)成分との電子的な相互作用が抑えられた結果を反映している。
10 基材層
11 色変換層
12 バリアフィルム
Claims (31)
- 以下の(A)成分、(B)成分および(C)成分を含有する色変換組成物。
(A)成分:発光材料
(B)成分:バインダー樹脂
(C)成分:Sc、V、Mn、Fe、Co、Cu、Y、Zr、Mo、Agおよびランタノイドからなる群より選ばれる少なくとも1種の遷移金属と有機酸との塩 - 前記(C)成分を構成する有機酸が炭素数2以上のアルキル基を含む請求項1に記載の色変換組成物。
- 前記(C)成分を構成する有機酸が炭素数4以上のアルキル基を含む請求項1に記載の色変換組成物。
- 前記(C)成分を構成する有機酸がエチルヘキシル基を含む酸および/またはエチルヘキサン酸である請求項1~3のいずれかに記載の色変換組成物。
- 前記(C)成分を構成する有機酸がβジケトンである請求項1~3のいずれかに記載の色変換組成物。
- 前記βジケトンが、シクロアルキル基を有する請求項5に記載の色変換組成物。
- 前記βジケトンが、シクロアルキル基を少なくとも2つ有する請求項5または6に記載の色変換組成物。
- 前記シクロアルキル基が、シクロヘキシル基、シクロヘプチル基、シクロオクチル基、ノルボルニル基およびアダマンチル基からなる群より選ばれる、請求項6または7に記載の色変換組成物。
- 前記(C)成分を構成する遷移金属がCuである請求項1~8のいずれかに記載の色変換組成物。
- 前記(C)成分を構成するCuの酸化数が+2である請求項9に記載の色変換組成物。
- 前記(C)成分を構成する遷移金属がNdまたはSmであり、その酸化数が+3である請求項1~8のいずれかに記載の色変換組成物。
- 前記(C)成分を2種以上含む請求項1~11のいずれかに記載の色変換組成物。
- 少なくとも第1の(C)成分および第2の(C)成分を含む色変換組成物であって、第1の(C)成分を構成する遷移金属がSc、V、Mn、Fe、Co、Cu、Y、Zr、MoおよびAgからなる群より選ばれ、かつ第2の(C)成分を構成する遷移金属がランタノイドである請求項12に記載の色変換組成物。
- 前記(C)成分の含有量が(B)成分100重量部に対して1.0×10-5重量部以上1重量部以下である請求項1~13のいずれかに記載の色変換組成物。
- 前記第1の(C)成分含有量w1と前記第2の(C)成分の含有量w2がw1≦w2の関係を満たす請求項13に記載の色変換組成物。
- 前記発光材料が有機発光材料である請求項1~15のいずれかに記載の色変換組成物。
- 前記(A)成分が下記一般式(1)で表される化合物を含有する請求項1~16のいずれかに記載の色変換組成物。
- 前記一般式(1)において、XがC-R7であり、R7が下記一般式(2)で表される基である請求項17に記載の色変換組成物。
- 前記(A)成分が遅延蛍光を放出する化合物である請求項1~16のいずれかに記載の色変換組成物。
- 前記遅延蛍光を放出する化合物が下記一般式(11)で表される化合物である請求項19に記載の色変換組成物。
- 前記一般式(11)で表される化合物が下記一般式(12)で表される化合物である請求項20に記載の色変換組成物。
- (A)成分が、下記の発光材料(a)および(b)のうち少なくとも一つを含有する請求項1~21のいずれかに記載の色変換組成物。
(a)波長430nm以上500nm以下の範囲の励起光を用いることにより、ピーク波長が500nm以上580nm以下の領域に観測される発光を呈する発光材料
(b)波長430nm以上500nm以下の範囲の励起光または発光材料(a)からの発光のいずれかまたは両方により励起されることにより、ピーク波長が580nm以上750nm以下の領域に観測される発光を呈する発光材料 - 前記(B)成分が熱可塑性樹脂である請求項1~22のいずれかに記載の色変換組成物。
- 請求項1~23のいずれかに記載の色変換組成物またはその硬化物を含む色変換フィルム。
- 前記色変換組成物またはその硬化物に含まれる溶媒の含有量が0.01重量%以上、3.0重量%以下である請求項24に記載の色変換フィルム。
- 光源および請求項1~23のいずれかに記載の色変換組成物もしくは請求項24または25に記載の色変換フィルムを含む光源ユニット。
- 前記光源が430nm以上500nm以下の範囲に極大発光を有する発光ダイオードである請求項26に記載の光源ユニット。
- 請求項26または27に記載の光源ユニットを含むディスプレイ。
- 請求項26または27に記載の光源ユニットを含む照明。
- 下記一般式(3)で表される構造を有する化合物。
ただし、次の条件(A)および条件(B)を満たす。
条件(A):R101~R103のうちの1つは、炭素数6以上のシクロアルキル基(a)であり、
条件(B):条件(A)以外のその他の少なくとも1つは、アリール基、シクロアルキル基、シクロアルケニル基、脂肪族複素環基および炭素数5以上のアルキル基の中から選ばれる。
MはSc、V、V=O、Mn、Ni、Cu、Zr、O=Mo=O、およびAgからなる群より選ばれる。
nは2~4の整数である。) - 前記一般式(3)においてMがCuであり、かつ、nが2である請求項30に記載の化合物。
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WO2024024590A1 (ja) * | 2022-07-25 | 2024-02-01 | 東レ株式会社 | 粒子状色変換材料、色変換部材ならびにそれを含む光源ユニット、ディスプレイ、照明装置および色変換基板 |
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WO2023008318A1 (ja) * | 2021-07-30 | 2023-02-02 | 東レ株式会社 | 色変換シート、それを含む光源ユニット、ディスプレイおよび照明装置 |
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WO2024057867A1 (ja) * | 2022-09-16 | 2024-03-21 | 東レ株式会社 | 色変換組成物、色変換シート、光源ユニット、表示装置および照明装置 |
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KR20220158226A (ko) | 2022-11-30 |
JPWO2021192795A1 (ja) | 2021-09-30 |
CN115315639A (zh) | 2022-11-08 |
EP4130009A4 (en) | 2023-12-13 |
EP4130009A1 (en) | 2023-02-08 |
TW202136474A (zh) | 2021-10-01 |
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