WO2015137291A1 - インク組成物、有機エレクトロルミネッセンス素子、及び電子機器 - Google Patents
インク組成物、有機エレクトロルミネッセンス素子、及び電子機器 Download PDFInfo
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- WO2015137291A1 WO2015137291A1 PCT/JP2015/056895 JP2015056895W WO2015137291A1 WO 2015137291 A1 WO2015137291 A1 WO 2015137291A1 JP 2015056895 W JP2015056895 W JP 2015056895W WO 2015137291 A1 WO2015137291 A1 WO 2015137291A1
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- 0 Cc(c(*)c1*)c(*)c(*)c1-c1c(*)c(*)c(*)c(C)c1I Chemical compound Cc(c(*)c1*)c(*)c(*)c1-c1c(*)c(*)c(*)c(C)c1I 0.000 description 12
- IOYYPNQFVZARNT-UHFFFAOYSA-N CC(C)c1cc(N(c(cc2C3(C)C)ccc2-c2c3cccc2)c2c3[o]c(cccc4)c4c3ccc2)c(ccc2c(C(C)C)cc3N(c(cc4)cc5c4-c4ccccc4C5(C)C)c4c5[o]c6ccccc6c5ccc4)c4c2c3ccc14 Chemical compound CC(C)c1cc(N(c(cc2C3(C)C)ccc2-c2c3cccc2)c2c3[o]c(cccc4)c4c3ccc2)c(ccc2c(C(C)C)cc3N(c(cc4)cc5c4-c4ccccc4C5(C)C)c4c5[o]c6ccccc6c5ccc4)c4c2c3ccc14 IOYYPNQFVZARNT-UHFFFAOYSA-N 0.000 description 2
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- DIGVBVCDVCOUTR-UHFFFAOYSA-N CC(C)(C)c(cccc1c2ccc3)c1[o]c2c3N(c(cc1)ccc1-c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c6c(C(C)(C)C)cccc6c5ccc3)c2c4cc1 Chemical compound CC(C)(C)c(cccc1c2ccc3)c1[o]c2c3N(c(cc1)ccc1-c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c6c(C(C)(C)C)cccc6c5ccc3)c2c4cc1 DIGVBVCDVCOUTR-UHFFFAOYSA-N 0.000 description 1
- MVMYPDMRVYGCEV-UHFFFAOYSA-N CC(C)C(CC1N(c2c3[o]c4ccccc4c3ccc2)c2nc(cccc3)c3cc2)=C(C=Cc2c34)c3c1ccc4c(C(C)C)cc2N(c1c2[o]c(cccc3)c3c2ccc1)c1nc(cccc2)c2cc1 Chemical compound CC(C)C(CC1N(c2c3[o]c4ccccc4c3ccc2)c2nc(cccc3)c3cc2)=C(C=Cc2c34)c3c1ccc4c(C(C)C)cc2N(c1c2[o]c(cccc3)c3c2ccc1)c1nc(cccc2)c2cc1 MVMYPDMRVYGCEV-UHFFFAOYSA-N 0.000 description 1
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- LODYWKJJFLBRBA-UHFFFAOYSA-N CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c(cc2)cc5c2[o]c2c5cccc2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c(cc2)cc3c2[o]c2ccccc32)c2c3[o]c4ccccc4c3ccc2)c1 Chemical compound CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c(cc2)cc5c2[o]c2c5cccc2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c(cc2)cc3c2[o]c2ccccc32)c2c3[o]c4ccccc4c3ccc2)c1 LODYWKJJFLBRBA-UHFFFAOYSA-N 0.000 description 1
- YFUUITZQWFBFBK-UHFFFAOYSA-N CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c2cc([Si+](C)(C)C)cc([Si+](C)(C)C)c2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c2cc([Si+](C)(C)C)cc([Si](C)(C)C)c2)c2c3[o]c4ccccc4c3ccc2)c1 Chemical compound CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c2cc([Si+](C)(C)C)cc([Si+](C)(C)C)c2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c2cc([Si+](C)(C)C)cc([Si](C)(C)C)c2)c2c3[o]c4ccccc4c3ccc2)c1 YFUUITZQWFBFBK-UHFFFAOYSA-N 0.000 description 1
- DDMHVIDYYCZAHI-UHFFFAOYSA-N CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c2ccc(C5CCCCC5)cc2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c2ccc(C3CCCCC3)cc2)c2c3[o]c4ccccc4c3ccc2)c1 Chemical compound CC(C)c1c(ccc2c3c(cc4)c(C(C)C)cc2N(c2ccc(C5CCCCC5)cc2)c2c5[o]c(cccc6)c6c5ccc2)c3c4c(N(c2ccc(C3CCCCC3)cc2)c2c3[o]c4ccccc4c3ccc2)c1 DDMHVIDYYCZAHI-UHFFFAOYSA-N 0.000 description 1
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- NNRRSJDVKKJESC-PQMHYQBVSA-N CC(C1)c(cc2)c3c4c2c(N(c2c5[o]c(CN)c(/C=C\C)c5ccc2)c2nc5ccccc5cc2)ccc4CC(C)C3=C1N(c1c2[o]c3ccccc3c2ccc1)c1nc(cccc2)c2cc1 Chemical compound CC(C1)c(cc2)c3c4c2c(N(c2c5[o]c(CN)c(/C=C\C)c5ccc2)c2nc5ccccc5cc2)ccc4CC(C)C3=C1N(c1c2[o]c3ccccc3c2ccc1)c1nc(cccc2)c2cc1 NNRRSJDVKKJESC-PQMHYQBVSA-N 0.000 description 1
- VCBPNJUPOOAZNE-UHFFFAOYSA-N CC(CC=C1)c(c2ccc3)c1[o]c2c3N(c1ccccc1)c1cc(-c2ccccc2C)c(cc2)c3c1ccc(c(-c1ccccc1C)c1)c3c2c1N(c1ccccc1)c1c2[o]c3ccccc3c2ccc1 Chemical compound CC(CC=C1)c(c2ccc3)c1[o]c2c3N(c1ccccc1)c1cc(-c2ccccc2C)c(cc2)c3c1ccc(c(-c1ccccc1C)c1)c3c2c1N(c1ccccc1)c1c2[o]c3ccccc3c2ccc1 VCBPNJUPOOAZNE-UHFFFAOYSA-N 0.000 description 1
- COFXCLHEWAVNMX-UHFFFAOYSA-N CC(CC=C1)c2c1c1cccc(N(c(cc3)ccc3-c3ccccc3)c3ccc(cc4)c5c3ccc(cc3)c5c4c3N(c(cc3)ccc3-c3ccccc3)c3c4[o]c5c(C)cccc5c4ccc3)c1[o]2 Chemical compound CC(CC=C1)c2c1c1cccc(N(c(cc3)ccc3-c3ccccc3)c3ccc(cc4)c5c3ccc(cc3)c5c4c3N(c(cc3)ccc3-c3ccccc3)c3c4[o]c5c(C)cccc5c4ccc3)c1[o]2 COFXCLHEWAVNMX-UHFFFAOYSA-N 0.000 description 1
- HKFLDLCXTFALKS-UHFFFAOYSA-N CC1(C)c(cc(cc2)N(c3c4[o]c(cccc5)c5c4ccc3)c3c(ccc(c4c5cc6)ccc5N(c(cc5C7(C)C)ccc5-c5c7cccc5)c5c7[o]c8ccccc8c7ccc5)c4c6cc3)c2-c2c1cccc2 Chemical compound CC1(C)c(cc(cc2)N(c3c4[o]c(cccc5)c5c4ccc3)c3c(ccc(c4c5cc6)ccc5N(c(cc5C7(C)C)ccc5-c5c7cccc5)c5c7[o]c8ccccc8c7ccc5)c4c6cc3)c2-c2c1cccc2 HKFLDLCXTFALKS-UHFFFAOYSA-N 0.000 description 1
- PVSUUGWQINJAON-UHFFFAOYSA-N CC1C2c3cccc(N(c4ccccc4)c(cc4)c5c(C67)c4C=CC6C(N(c4ccccc4)c4c6[s]c8ccccc8c6ccc4)=CC=C7C=C5)c3SC2CCC1 Chemical compound CC1C2c3cccc(N(c4ccccc4)c(cc4)c5c(C67)c4C=CC6C(N(c4ccccc4)c4c6[s]c8ccccc8c6ccc4)=CC=C7C=C5)c3SC2CCC1 PVSUUGWQINJAON-UHFFFAOYSA-N 0.000 description 1
- ZSBMNOLNDMHZBD-UHFFFAOYSA-N CCc(cc1)ccc1N(C1(C)C=CC=C2c(cccc3CC)c3OC12)c1c(ccc2ccc3N(c4ccc(CC)cc4)c4c5[o]c6c(CC)cccc6c5ccc4)c4c2c3ccc4cc1 Chemical compound CCc(cc1)ccc1N(C1(C)C=CC=C2c(cccc3CC)c3OC12)c1c(ccc2ccc3N(c4ccc(CC)cc4)c4c5[o]c6c(CC)cccc6c5ccc4)c4c2c3ccc4cc1 ZSBMNOLNDMHZBD-UHFFFAOYSA-N 0.000 description 1
- HMCGGUGWGFUMBS-UHFFFAOYSA-N CCc(cc1)ccc1N(c1c2[o]c(c(C)ccc3)c3c2ccc1)c1ccc(ccc2c34)c3c1ccc4ccc2N(c1ccc(C)cc1)c1c2[o]c(c(C)ccc3)c3c2ccc1 Chemical compound CCc(cc1)ccc1N(c1c2[o]c(c(C)ccc3)c3c2ccc1)c1ccc(ccc2c34)c3c1ccc4ccc2N(c1ccc(C)cc1)c1c2[o]c(c(C)ccc3)c3c2ccc1 HMCGGUGWGFUMBS-UHFFFAOYSA-N 0.000 description 1
- SSBFFGDCPJYBNS-UHFFFAOYSA-N CCc(cccc1c2ccc3)c1[o]c2c3N(c1ccccc1)c1ccc(cc2)c3c1ccc(cc1)c3c2c1N(c1ccccc1)c(cccc1c2ccc3)c1[o]c2c3C(C)=[IH] Chemical compound CCc(cccc1c2ccc3)c1[o]c2c3N(c1ccccc1)c1ccc(cc2)c3c1ccc(cc1)c3c2c1N(c1ccccc1)c(cccc1c2ccc3)c1[o]c2c3C(C)=[IH] SSBFFGDCPJYBNS-UHFFFAOYSA-N 0.000 description 1
- MQSGGVPDJCHCIW-UHFFFAOYSA-N CCc1cccc(c2ccc3)c1[o]c2c3N(c(cc1)ccc1-c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c(c(CC)ccc6)c6c5ccc3)c2c4cc1 Chemical compound CCc1cccc(c2ccc3)c1[o]c2c3N(c(cc1)ccc1-c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c(c(CC)ccc6)c6c5ccc3)c2c4cc1 MQSGGVPDJCHCIW-UHFFFAOYSA-N 0.000 description 1
- LOPDHVWGJIKNLU-UHFFFAOYSA-N CCc1ccccc1-c1cccc(-c2cccc(N(c3ccc(C4CCCCC4)cc3)c3cc(C4CCCCC4)c(cc4)c5c3ccc(c(C3CCCCC3)c3)c5c4c3N(c3ccc(C4CCCCC4)cc3)c(cccc3c4ccc5)c3[o]c4c5-c3c(CC)cccc3)c2O)c1 Chemical compound CCc1ccccc1-c1cccc(-c2cccc(N(c3ccc(C4CCCCC4)cc3)c3cc(C4CCCCC4)c(cc4)c5c3ccc(c(C3CCCCC3)c3)c5c4c3N(c3ccc(C4CCCCC4)cc3)c(cccc3c4ccc5)c3[o]c4c5-c3c(CC)cccc3)c2O)c1 LOPDHVWGJIKNLU-UHFFFAOYSA-N 0.000 description 1
- QYIPRQCHWNIZCC-UHFFFAOYSA-N C[Si](C)(C)c1cc([Si+](C)(C)C)cc(N(c2c3[o]c4ccccc4c3ccc2)c2ccc(cc3)c4c2ccc(cc2)c4c3c2N(c2cc([Si+](C)(C)C)cc([Si+](C)(C)C)c2)c2c3[o]c(cccc4)c4c3ccc2)c1 Chemical compound C[Si](C)(C)c1cc([Si+](C)(C)C)cc(N(c2c3[o]c4ccccc4c3ccc2)c2ccc(cc3)c4c2ccc(cc2)c4c3c2N(c2cc([Si+](C)(C)C)cc([Si+](C)(C)C)c2)c2c3[o]c(cccc4)c4c3ccc2)c1 QYIPRQCHWNIZCC-UHFFFAOYSA-N 0.000 description 1
- UNGKDKFYFSNKPZ-UHFFFAOYSA-N Cc(cccc1c2ccc3)c1[o]c2c3N(c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c3ccccc3)c3c5[o]c6c(C)cccc6c5ccc3)c2c4cc1 Chemical compound Cc(cccc1c2ccc3)c1[o]c2c3N(c1ccccc1)c1c(ccc(c2c3cc4)ccc3N(c3ccccc3)c3c5[o]c6c(C)cccc6c5ccc3)c2c4cc1 UNGKDKFYFSNKPZ-UHFFFAOYSA-N 0.000 description 1
- GWHJZXXIDMPWGX-UHFFFAOYSA-N Cc1cc(C)c(C)cc1 Chemical compound Cc1cc(C)c(C)cc1 GWHJZXXIDMPWGX-UHFFFAOYSA-N 0.000 description 1
- MMLIAYZMXABFHY-UHFFFAOYSA-N Cc1cc(N(c2c3[s]c4ccccc4c3ccc2)c(c2ccc3cc4)ccc(cc5)c2c3c5c4N(c2cc(C)cc(C)c2)c2c3[s]c(cccc4)c4c3ccc2)cc(C)c1 Chemical compound Cc1cc(N(c2c3[s]c4ccccc4c3ccc2)c(c2ccc3cc4)ccc(cc5)c2c3c5c4N(c2cc(C)cc(C)c2)c2c3[s]c(cccc4)c4c3ccc2)cc(C)c1 MMLIAYZMXABFHY-UHFFFAOYSA-N 0.000 description 1
- CCGOAXZFABLYRK-UHFFFAOYSA-N FC(c(cc1)ccc1N(c1c2[o]c(cccc3)c3c2ccc1)c1c(ccc2ccc3N(c4ccc(C(F)(F)F)cc4)c4c5[o]c6ccccc6c5ccc4)c4c2c3ccc4cc1)(F)F Chemical compound FC(c(cc1)ccc1N(c1c2[o]c(cccc3)c3c2ccc1)c1c(ccc2ccc3N(c4ccc(C(F)(F)F)cc4)c4c5[o]c6ccccc6c5ccc4)c4c2c3ccc4cc1)(F)F CCGOAXZFABLYRK-UHFFFAOYSA-N 0.000 description 1
- RMNPKZYCADYBBK-UHFFFAOYSA-N c(cc1)ccc1-c(cc1)ccc1N(c1c2[o]c3ccccc3c2ccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c(cccc6)c6c5ccc3)c2c4cc1 Chemical compound c(cc1)ccc1-c(cc1)ccc1N(c1c2[o]c3ccccc3c2ccc1)c1c(ccc(c2c3cc4)ccc3N(c(cc3)ccc3-c3ccccc3)c3c5[o]c(cccc6)c6c5ccc3)c2c4cc1 RMNPKZYCADYBBK-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present technology relates to an ink composition, an organic electroluminescence element including an organic thin film produced using the ink composition, and an electronic device including the organic electroluminescence element.
- Patent Document 1 discloses an ink composition comprising an organic material and a specific solvent for enabling coating
- Patent Document 2 discloses.
- a luminescent ink composition for use in a wet process As a luminescent material used for the luminescent ink for coating film formation, the anthracene derivative currently disclosed by patent document 3 is known, for example.
- an ink composition that does not have sufficient luminous efficiency and that can provide higher luminous efficiency.
- an ink composition capable of producing an organic EL device having excellent luminous efficiency, and an organic electroluminescence device and electronic equipment using the same.
- an ink composition comprising the following component (A), component (B) and component (C).
- component Anthracene derivative represented by the following formula (A1) (In the formula (A1), L is a single bond or a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms or a heteroarylene group having 5 to 50 ring atoms, and A1 and A2 are each substituted. Or an unsubstituted aryl group having 6 to 50 ring carbon atoms or a heteroaryl group having 5 to 50 ring atoms, and l and m are each an integer of 0 to 9.
- (B) Component Aromatic amine derivative represented by the following formula (B1) (In the formula (B1), R 1 to R 8 are each a hydrogen atom or a substituent, and Ar 1 to Ar 4 are each a substituted or unsubstituted aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted ring. It is a heterocyclic group having 5 to 30 atoms. However, at least one of Ar1 to Ar4 is a heterocyclic group represented by the following formula (B1 ′).
- R11 to R17 are each a hydrogen atom or a substituent, and R11 to R17 may form a saturated or unsaturated ring with adjacent substituents.
- Component (C) A solvent represented by the following formula (C1), having a boiling point of 110 ° C. or higher and a solubility in water of 1 wt% or lower.
- R is a substituent, and n is an integer of 1 to 6. When n is 2 or more, a plurality of R may be the same or different.
- an ink composition capable of producing an organic EL element having excellent luminous efficiency, and an organic electroluminescence element and an electronic apparatus using the ink composition.
- An ink composition according to an embodiment of the present technology includes the following component (A), component (B), and component (C).
- the ink composition containing the above components can be formed into a thin film by a wet process, and an organic EL device having an organic thin film produced using the ink composition can achieve high luminous efficiency.
- the number of ring-forming carbon atoms refers to the ring itself of a compound having a structure in which atoms are bonded in a ring (for example, a monocyclic compound, a condensed ring compound, a bridged compound, a carbocyclic compound, or a heterocyclic compound). This represents the number of carbon atoms among the constituent atoms.
- the carbon contained in the substituent is not included in the number of ring-forming carbons.
- the “ring-forming carbon number” described below is the same unless otherwise specified.
- the benzene ring has 6 ring carbon atoms
- the naphthalene ring has 10 ring carbon atoms
- the pyridinyl group has 5 ring carbon atoms
- the furanyl group has 4 ring carbon atoms.
- the carbon number of the alkyl group is not included in the number of ring-forming carbons.
- the carbon number of the fluorene ring as a substituent is not included in the number of ring-forming carbons.
- the number of ring-forming atoms means a compound (for example, a monocyclic compound, a condensed ring compound, a bridging compound, a carbocyclic compound, a heterocyclic compound) having a structure in which atoms are bonded in a cyclic manner (for example, a monocyclic ring, a condensed ring, or a ring assembly).
- a compound for example, a monocyclic compound, a condensed ring compound, a bridging compound, a carbocyclic compound, a heterocyclic compound having a structure in which atoms are bonded in a cyclic manner (for example, a monocyclic ring, a condensed ring, or a ring assembly).
- a cyclic manner for example, a monocyclic ring, a condensed ring, or a ring assembly
- An atom that does not constitute a ring for example, a hydrogen atom that terminates a bond of an atom that constitutes a ring
- an atom contained in a substituent when the ring is substituted by a substituent is not included in the number of ring-forming atoms.
- the “number of ring-forming atoms” described below is the same unless otherwise specified.
- the pyridine ring has 6 ring atoms
- the quinazoline ring has 10 ring atoms
- the furan ring has 5 ring atoms.
- a hydrogen atom bonded to a carbon atom of a pyridine ring or a quinazoline ring or an atom constituting a substituent is not included in the number of ring-forming atoms. Further, when, for example, a fluorene ring is bonded to the fluorene ring as a substituent (including a spirofluorene ring), the number of atoms of the fluorene ring as a substituent is not included in the number of ring-forming atoms.
- the “carbon number XX to YY” in the expression “substituted or unsubstituted ZZ group having XX to YY” represents the number of carbon atoms in the case where the ZZ group is unsubstituted. The carbon number of the substituent in the case where it is present is not included.
- “YY” is larger than “XX”, and “XX” and “YY” each mean an integer of 1 or more.
- atom number XX to YY in the expression “a ZZ group having a substituted or unsubstituted atom number XX to YY” represents the number of atoms when the ZZ group is unsubstituted. In this case, the number of substituent atoms is not included.
- YY is larger than “XX”, and “XX” and “YY” each mean an integer of 1 or more.
- unsubstituted in the case of “substituted or unsubstituted” means that a hydrogen atom is bonded without being substituted with the above substituent.
- the hydrogen atom includes isotopes having different neutron numbers, that is, light hydrogen (protium), deuterium (deuterium), and tritium.
- neutron numbers that is, light hydrogen (protium), deuterium (deuterium), and tritium.
- the component (A) is an anthracene derivative represented by the following formula (A1).
- L is a single bond, a substituted or unsubstituted arylene group having 6 to 50 ring carbon atoms or a heteroarylene group having 5 to 50 ring atoms, and A1 and A2 are substituted or It is an unsubstituted aryl group having 6 to 50 ring carbon atoms or a heteroaryl group having 5 to 50 ring atoms, and l and m are each an integer of 0 to 9.
- the plurality of A1 may be the same or different, and when m is an integer of 2 or more, the plurality of A2 may be the same or different.
- L may be bonded to any bonding position in the three-membered ring of the anthracene skeleton.
- A1 and A2 may also be bonded to any bonding position in the three-membered ring of the anthracene skeleton.
- l and m are each preferably an integer of 1 to 3, more preferably 1.
- the anthracene derivative is preferably represented by the following formula (A2).
- L, A1 and A2 are the same as those in formula (A1).
- L may be bonded to any bonding position in the three-membered ring of the anthracene skeleton.
- the anthracene derivative is more preferably represented by the following formula (A3).
- formula (A3) L, A1 and A2 are the same as those in formula (A1).
- the anthracene derivative is more preferably represented by the following formula (A4).
- L is the same as in formula (A1)
- Ra and Rb are each a substituent
- s and t are each an integer of 0 to 5.
- the plurality of Ras may be the same or different
- t is an integer of 2 or more
- the plurality of Rb may be the same or different
- s and t are each preferably an integer of 0 to 2.
- Examples of the substituent for Ra and Rb include a substituted or unsubstituted aryl group having 6 to 50 carbon atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, and a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms.
- Examples of the substituent in “substituted or unsubstituted...” In formulas (A1) to (A4) include an alkyl group, an alkoxy group, an aralkyl group, an aryl group, an aryloxy group, a heteroaryl group, a halogen atom, and cyano. Groups and the like. These substituents may be further substituted with the above substituents. A plurality of these substituents may be bonded to each other to form a ring.
- aryl groups having 6 to 50 ring carbon atoms include phenyl, 2-biphenylyl, 3-biphenylyl, 4-biphenylyl, terphenylyl, 3,5-diphenylphenyl, 3,5-di (1-naphthyl) phenyl, 3,5-di (2-naphthyl) phenyl, 3,4-diphenylphenyl, pentaphenylphenyl, 4- (2,2-diphenylvinyl) phenyl, 4- (1,2,2-triphenylvinyl) phenyl, Fluorenyl, 1-naphthyl, 2-naphthyl, 4- (1-naphthyl) phenyl, 4- (2-naphthyl) phenyl, 3- (1-naphthyl) phenyl, 3- (2-naphthyl),
- heteroaryl groups having 5 to 50 ring atoms include 1-pyrrolyl group, 2-pyrrolyl group, 3-pyrrolyl group, pyrazinyl group, pyrimidyl group, pyridazyl group, 2-pyridinyl group, 3-pyridinyl group, 4-pyridinyl group, 1-indolyl group, 2-indolyl group, 3-indolyl group, 4-indolyl group, 5-indolyl group, 6-indolyl group, 7-indolyl group, 1-isoindolyl group, 2-isoindolyl group, 3-isoindolyl group, 4-isoindolyl group, 5-isoindolyl group, 6-isoindolyl group, 7-isoindolyl group, 2-furyl group, 3-furyl group, 2-benzofuranyl group, 3-benzofuranyl group, 4-benzofuranyl group, 5-benzofuranyl
- Examples of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms include methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n- Pentyl group, n-hexyl group, n-heptyl group, n-octyl group, chloromethyl group, 1-chloroethyl group, 2-chloroethyl group, 2-chloroisobutyl group, 1,2-dichloroethyl group, 1,3- Dichloroisopropyl, 2,3-dichloro-t-butyl, 1,2,3-trichloropropyl, bromomethyl, 1-bromoethyl, 2-bromoethyl, 2-bromoisobutyl, 1,2-dibromoethyl Group, 1,3-dibromoi
- the substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms is a group represented by —OY1, and examples of Y1 include a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an s— Butyl, isobutyl, t-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 2-hydroxy Isobutyl group, 1,2-dihydroxyethyl group, 1,3-dihydroxyisopropyl group, 2,3-dihydroxy-t-butyl group, 1,2,3-trihydroxypropyl group, chloromethyl group, 1-chloroethyl group, 2-chloroethyl group, 2-chloroisobutyl group, 1,2-dichloroethy
- substituted or unsubstituted aralkyl groups include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl-t-butyl, ⁇ -naphthylmethyl Group, 1- ⁇ -naphthylethyl group, 2- ⁇ -naphthylethyl group, 1- ⁇ -naphthylisopropyl group, 2- ⁇ -naphthylisopropyl group, ⁇ -naphthylmethyl group, 1- ⁇ -naphthylethyl group, 2- ⁇ -naphthylethyl group, 1- ⁇ -naphthylisopropyl group, 2- ⁇ -naphthylisopropyl group, 1-pyrrolylmethyl group, 2- (1-pyrrolyl) ethyl group, p-methylbenzyl group
- a substituted or unsubstituted aryloxy group is represented by —OY ′, and examples of Y ′ include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 1-anthryl group, a 2-anthryl group, and a 9-anthryl group.
- the anthracene derivative as the component (A) preferably has a high glass transition point (Tg).
- a high glass transition point is suitable for use as a host material for an organic EL device.
- the glass transition point is preferably 135 ° C. or higher, more preferably 140 ° C. or higher.
- the component (B) is an aromatic amine derivative represented by the following formula (B1).
- R1 to R8 are each a hydrogen atom or a substituent
- Ar1 to Ar4 are each a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted ring forming atom. It is a heterocyclic group of several 5-30. However, at least one of Ar1 to Ar4 is a heterocyclic group represented by the following formula (B1 ′).
- R11 to R17 are each a hydrogen atom or a substituent, and R11 to R17 may form a saturated or unsaturated ring with adjacent substituents.
- X1 is an oxygen atom or a sulfur atom.
- X1 is preferably an oxygen atom.
- the aromatic amine derivative is preferably represented by the following formula (B2).
- R1 to R8, Ar2 and Ar4 are the same as in the formula (B1).
- R21 to R27 and R31 to R37 are each a hydrogen atom or a substituent, and R21 to R27 and R31 to R37 may form a saturated or unsaturated ring with adjacent substituents.
- X2 and X3 are each an oxygen atom or a sulfur atom.
- R1 to R8, R11 to R17, R21 to R27, and R31 to R37 examples include a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and a substituted or unsubstituted ring forming carbon number of 3 to 10
- Ar2 and Ar4 are each preferably a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, and more preferably a substituted or unsubstituted phenyl group.
- R1 to R8 may be a hydrogen atom
- R2 is a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, substituted Or an unsubstituted silyl group or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms
- R1 and R3 to R8 may be a hydrogen atom
- R2 and R6 are a halogen atom and a substituted group, respectively.
- an unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, a substituted or unsubstituted silyl group, or a substituted or unsubstituted ring carbon number 6 to 30 aryl groups, and R1, R3, R4, R5, R7 and R8 may be hydrogen atoms.
- X2 and X3 are preferably oxygen atoms.
- Examples of the substituent in “substituted or unsubstituted...” in formulas (B1) and (B2) include an alkyl group, a substituted or unsubstituted silyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, Examples include a cycloalkyl group, a heterocyclic group, a halogen atom, a halogenated alkyl group, a hydroxyl group, a nitro group, a cyano group, and a carboxy group. These substituents may be further substituted with the above substituents. A plurality of these substituents may be bonded to each other to form a ring.
- each group in the above formulas (B1) and (B2) are given below.
- the alkyl group include methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, n-hexyl group, n-heptyl group, Examples thereof include an n-octyl group, and may be a substituent in which an alkylene group and an aryl group are combined (for example, a phenylmethyl group, a 2-phenylisopropyl group, etc.).
- the carbon number is preferably from 1 to 10, and more preferably from 1 to 6. Of these, methyl, ethyl, propyl, isopropyl, n-butyl, s-butyl, isobutyl, t-butyl, n-pentyl and n-hexyl are preferred.
- Examples of the substituted silyl group include an alkylsilyl group having 3 to 30 carbon atoms, an arylsilyl group having 8 to 30 ring carbon atoms, a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, and a vinyldimethylsilyl group.
- the alkoxy group is represented as —OY, and examples of Y include the above alkyl examples.
- the alkoxy group is, for example, a methoxy group or an ethoxy group.
- the alkenyl group described as R11 to R17, R21 to R27, R31 to R37, R41 to 48 is preferably a vinyl group, and the alkynyl group is preferably an ethynyl group.
- aryl group for example, phenyl group, 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 2-anthryl group, 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4-phenanthryl group, 9-phenanthryl group, naphthacenyl group, pyrenyl group, chrysenyl group, benzo [c] phenanthryl group, benzo [g] chrysenyl group, triphenylenyl group, 1-fluorenyl group, 2-fluorenyl group, 3-fluorenyl group 4-fluorenyl group, 9-fluorenyl group, benzofluorenyl group, dibenzofluorenyl group, 2-biphenylyl group, 3-biphenylyl group, 4-biphenylyl group, terphenyl group, fluoranthenyl group, etc.
- the aryl group described as R1 to R8 preferably has 6 to 20 ring carbon atoms, more preferably 6 to 12, and among the above aryl groups, a phenyl group, a biphenyl group, a tolyl group, a xylyl group.
- the 1-naphthyl group is particularly preferred.
- the aryloxy group is represented by —OZ, and examples of Z include the above aryl groups, and examples of monocyclic groups and condensed ring groups described later.
- the aryloxy group is, for example, a phenoxy group.
- the aralkyl group is represented by —Y—Z.
- Y include alkylene examples corresponding to the above alkyl examples, and examples of Z include the above aryl examples.
- the aralkyl group has 7 to 50 carbon atoms (the aryl moiety has 6 to 49 carbon atoms (preferably 6 to 30, more preferably 6 to 20, particularly preferably 6 to 12), and the alkyl moiety has 1 to 44 carbon atoms. (Preferably 1-30, more preferably 1-20, still more preferably 1-10, particularly preferably 1-6)), for example, benzyl group, phenylethyl group, 2-phenylpropane-2- It is an yl group.
- cycloalkyl group examples include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a 4-methylcyclohexyl group, an adamantyl group, and a norbornyl group.
- the number of ring-forming carbons is preferably 3 to 10, more preferably 5 to 8, more preferably 3 to 8, and particularly preferably 3 to 6.
- heterocyclic group examples include pyrrolyl group, pyrazinyl group, pyridinyl group, indolyl group, isoindolyl group, imidazolyl group, furyl group, benzofuranyl group, isobenzofuranyl group, 1-dibenzofuranyl group, and 2-dibenzofuranyl group.
- the number of ring-forming atoms of the heterocyclic group is preferably 5 to 20, and more preferably 5 to 14.
- halogen atom examples include fluorine, chlorine, bromine, iodine, and the like, preferably a fluorine atom.
- halogenated alkyl group examples include a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a fluoroethyl group, and a trifluoromethylmethyl group.
- the solvent as component (C) is represented by the following formula (C1), has a boiling point of 110 ° C. or higher, and a solubility in water of 1 wt% or lower.
- R is a substituent
- n is an integer of 1-6. When n is 2 or more, the plurality of R may be the same or different.
- R is an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 10 ring carbon atoms, an ether bond-containing group, a carbonyl bond-containing group, an ester bond-containing group, or the like. Is mentioned. n is preferably an integer of 1 or more and 3 or less.
- substituents may be further substituted with an alkyl group, a cycloalkyl group, an aryl group or the like. A plurality of these substituents may be bonded to each other to form a ring.
- each group in the above formula (C1) is given below.
- the alkyl group having 1 to 20 carbon atoms include methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, and n-hexyl group. , N-heptyl group, n-octyl group and the like.
- Examples of the cycloalkyl group having 3 to 10 ring carbon atoms include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a 4-methylcyclohexyl group, an adamantyl group, and a norbornyl group.
- Examples of the ether bond-containing group include a methoxy group, an ethoxy group, a propoxyl group, and a phenoxy group.
- Examples of the carbonyl bond-containing group include a benzoyl group.
- Examples of the ester bond-containing group include a methyl ester group, an ethyl ester group, and a propyl ester group.
- the boiling point of the solvent is 110 ° C. or higher, preferably 120 ° C. or higher.
- a boiling point of 110 ° C. or higher is preferable because moisture can be removed.
- the solubility of the solvent in water is 1 wt% or less, preferably 0.5 wt% or less. Since the performance of the organic EL element may be remarkably deteriorated due to moisture, a solvent having low solubility in water is desirable.
- the boiling point and solubility in water are those described on the Health and Safety Information Center website or the US Department of Health and Welfare website (HSDS (Hazard Substances Data Base)).
- solvent As the solvent as component (C), specifically, toluene, xylene, ethylbenzene, diethylbenzene, methicylene, propylbenzene, cyclohexylbenzene, dimethoxybenzene, anisole, ethoxytoluene, phenoxytoluene, isopropylbiphenyl, dimethylanisole, phenyl acetate, Examples include phenyl propionate, methyl benzoate, and ethyl benzoate.
- the solvent of a component can use 1 type (s) or 2 or more types. Furthermore, the ink composition may contain a solvent other than the component (C).
- the content of the anthracene derivative as the component (A) is preferably 0.5 wt% or more, and more preferably 1 wt% or more.
- the thickness of the light emitting layer of the organic EL element is 10 to 100 nm, but generally it is 50 nm. If it is 50 nm or more, the light emission performance and color tone can be stabilized.
- the solution concentration is preferably 0.5 wt% or more in order to easily form a film thickness of 50 nm or more. If it is 0.5 wt% or more, the film can be formed without any problem.
- the content of the aromatic amine derivative as the component (B) is preferably 0.001 wt% or more, and particularly preferably 0.01 wt%.
- a known additive may be added to the ink composition according to an embodiment of the present technology as necessary.
- an appropriate resin, various additives, and the like can be blended as desired within a range that does not impair the purpose of the present technology in order to improve film forming properties and prevent pinholes in the film.
- Usable resins include, for example, insulating resins such as polystyrene, polycarbonate, polyarylate, polyester, polyamide, polyurethane, polysulfone, polymethyl methacrylate, polymethyl acrylate, and cellulose, and copolymers thereof, poly-N-vinylcarbazole.
- photoconductive resins such as polysilane, and conductive resins such as polythiophene and polypyrrole.
- examples of various additives include antioxidants, ultraviolet absorbers, and plasticizers.
- 90 wt% or more, 95 wt% or more, 98 wt% or more, and 100 wt% may include the components (A) to (C).
- the ink composition according to an embodiment of the present technology is formed by a known wet method such as a coating method, an injection method, a spray method, a spinner method, a dampening coating method, a screen printing method, a roll coater method, an LB method, and the like. I can make a film.
- the ink composition according to an embodiment of the present technology is suitable for forming an organic thin film of an organic EL element.
- An organic EL element according to an embodiment of the present technology is one in which one or more organic thin film layers including at least a light emitting layer are sandwiched between a cathode and an anode, and the light emitting layer is formed using the above ink composition. is there.
- FIG. 1 is a cross-sectional view illustrating an organic EL element according to an embodiment of the present technology.
- the hole injection layer 22, the light emitting layer 24, and the electron injection layer 26 are sandwiched between the cathode 30 and the anode 10.
- the light emitting layer 24 is formed by using the above ink composition.
- anode / light emitting layer / cathode (2) Anode / hole injection layer / light emitting layer / cathode (3) Anode / light emitting layer / electron injection layer / cathode (4) Anode / hole injection layer / light emitting layer / electron Injection layer / cathode ( Figure 1) (5) Anode / hole injection layer / hole transport layer / light emitting layer / electron injection layer / cathode (6) Anode / hole injection layer / light emitting layer / hole blocking layer / electron injection layer / cathode (7) Anode Examples of the structure include / hole injection layer / hole transport layer / light emitting layer / hole blocking layer / electron injection layer / cathode, but are not limited thereto. Of these, the configuration of (5) is preferably used.
- one or more layers sandwiched between the anode and the cathode correspond to organic thin films, but not all of these layers may be composed of organic compounds, or layers composed of inorganic compounds or A layer containing an inorganic compound may be included.
- the organic thin film formed using the above ink composition may be used in any of the organic layers described above, but may be contained in the light emission band or hole transport band in these components. preferable.
- the light emitting layer has the following functions.
- injection function a function capable of injecting holes from an anode or a hole injection layer when an electric field is applied, and a function of injecting electrons from a cathode or an electron injection layer;
- transport function function to move injected charges (electrons and holes) by the force of an electric field;
- light emission function function to provide a field for recombination of electrons and holes and connect this to light emission.
- the light emitting layer for example, a known method such as a vapor deposition method, a spin coating method, or an LB method can be applied.
- the light emitting layer can also be formed by dissolving a binder such as a resin and a material compound in a solvent to form a solution, and then thinning the solution by a spin coating method or the like.
- the above-described ink composition may be included in the light-emitting layer as desired, and other known light-emitting materials may be included in the light-emitting layer.
- a light-emitting layer containing another known light-emitting material may be stacked on the light-emitting layer formed from the above.
- the light emitting layer may be formed by a dry method such as a vacuum evaporation method.
- a glass plate, a polymer plate or the like can be used as the substrate.
- the glass plate include soda lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz.
- the polymer plate include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfone, and polysulfone.
- the anode is made of, for example, a conductive material, and a conductive material having a work function larger than 4 eV is suitable.
- the conductive material include carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold, platinum, palladium, and their alloys, ITO substrate, tin oxide used for NESA substrate, indium oxide, and the like.
- examples thereof include metal oxides and organic conductive resins such as polythiophene and polypyrrole.
- the anode may be formed with a layer structure of two or more layers if necessary.
- the cathode is made of, for example, a conductive material, and a conductive material having a work function smaller than 4 eV is suitable.
- the conductive material include, but are not limited to, magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, aluminum, lithium fluoride, and alloys thereof.
- the alloy include magnesium / silver, magnesium / indium, lithium / aluminum, and the like, but are not limited thereto.
- the ratio of the alloy is controlled by the temperature of the vapor deposition source, the atmosphere, the degree of vacuum, etc., and is selected to an appropriate ratio.
- the cathode may be formed with a layer structure of two or more layers, and the cathode can be produced by forming a thin film from the conductive material by a method such as vapor deposition or sputtering.
- the transmittance of the cathode for light emission is preferably greater than 10%.
- the sheet resistance as a cathode is preferably several hundred ⁇ / ⁇ or less, and the film thickness is usually 10 nm to 1 ⁇ m, preferably 50 nm to 200 nm.
- the hole injection / transport layer is a layer that assists hole injection into the light emitting layer and transports it to the light emitting region, and has a high hole mobility and a small ionization energy of usually 5.6 eV or less.
- the material for the hole injection / transport layer is preferably a material that transports holes to the light emitting layer with a lower electric field strength, and further has an electric field with a hole mobility of, for example, 10 4 V / cm to 10 6 V / cm. At the time of application, at least 10 ⁇ 4 cm 2 / V ⁇ sec is preferable.
- the material for the hole injection / transport layer include triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives and pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives.
- inorganic compounds such as p-type Si and p-type SiC can also be used as the hole injection material.
- a crosslinkable material can be used as the material for the hole injecting / transporting layer, and examples of the crosslinkable hole injecting / transporting layer include a layer in which a known cross-linking material is insolubilized by heat, light or the like.
- an interlayer layer may be provided therebetween.
- the interlayer layer is also called an electronic blocking layer.
- the interlayer layer By providing the interlayer layer, the electron blocking ability can be enhanced, and damage to the light emitting layer over time due to the material used for the hole injection layer can be reduced.
- the interlayer preferably has a function as a hole transport layer. By the interlayer, it is possible to improve the light emission efficiency and durability of the organic electroluminescence element.
- the interlayer is usually formed between the hole injection layer and the light emitting layer so as to be adjacent to the light emitting layer.
- the interlayer is also preferably adjacent to the hole injection layer.
- a low molecular to high molecular material having a small LUMO can be used as a material constituting the interlayer.
- a material constituting the interlayer a low molecular to high molecular material having a small LUMO can be used.
- polyvinylcarbazole (PVCz) polypyridine, polyaniline, and the like having a polyamine having an aromatic amine in the side chain or main chain.
- Examples include polymers containing aromatic amines such as arylene derivatives, but are not limited thereto.
- the thickness of the interlayer can be about 10 to 30 nm, but is not limited thereto. This thickness refers to the thickness of the layer composed only of the interlayer material, and refers to the thickness of the region not including the light emitting layer material.
- the electron injection / transport layer is a layer that assists the injection of electrons into the light emitting layer and transports it to the light emitting region, and has a high electron mobility.
- an electrode for example, a cathode
- the electron injecting / transporting layer is appropriately selected with a film thickness of several nm to several ⁇ m. In particular, when the film thickness is large, in order to avoid a voltage increase, 10 4 V / cm.
- the electron mobility is preferably at least 10 ⁇ 5 cm 2 / Vs or more when an electric field of ⁇ 10 6 V / cm is applied.
- an aromatic heterocyclic compound containing one or more heteroatoms in the molecule is preferably used, and a nitrogen-containing ring derivative is particularly preferable.
- the nitrogen-containing ring derivative is preferably an aromatic ring having a nitrogen-containing 6-membered ring or 5-membered ring skeleton, or a condensed aromatic ring compound having a nitrogen-containing 6-membered ring or 5-membered ring skeleton.
- the interlayer insulating film in the organic EL multicolor light emitting device of the present technology is mainly used for the purpose of separating each light emitting element (light emitting layer), but in addition, planarization of the edge of a high-definition electrode, organic EL Used for electrical insulation (short circuit prevention) between the lower electrode and the upper electrode of the element.
- the constituent materials used for the interlayer insulating film are usually organic materials such as acrylic resin, polycarbonate resin, polyimide resin, silicon oxide (SiO 2 or SiO x ), aluminum oxide (Al 2 O 3 or AlO x ), titanium oxide.
- the interlayer insulating film is preferably formed into a desired pattern by a photolithographic method by introducing a photosensitive group into the constituent material or by a printing method.
- each layer of the organic EL multicolor light emitting device of the present technology is performed by a known dry film forming method such as vacuum deposition, sputtering, plasma, ion plating, spin coating method, casting method, micro gravure coating method, gravure coating method, Known wet film formation such as bar coating method, roll coating method, slit coating method, wire bar coating method, dip coating method, spray coating method, screen printing method, flexographic printing method, offset printing method, ink jet method, nozzle printing method, etc.
- methods such as a screen printing method, a flexographic printing method, an offset printing method, and an ink jet printing method can be applied.
- each layer is not particularly limited, but must be set to an appropriate thickness. If the film thickness is too thick, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. If the film thickness is too thin, pinholes and the like are generated, and sufficient light emission luminance cannot be obtained even when an electric field is applied.
- the normal film thickness is suitably in the range of 5 nm to 10 ⁇ m, but more preferably in the range of 10 nm to 0.2 ⁇ m.
- film formation using a solution containing an aromatic amine derivative can be mentioned.
- Film formation methods include spin coating, casting, micro gravure coating, gravure coating, bar coating, roll coating, slit coating, wire bar coating, dip coating, spray coating, and screen printing. , Flexographic printing method, offset printing method, ink jet method, nozzle printing method, and the like. In the case of pattern formation, screen printing method, flexographic printing method, offset printing method, and ink jet printing method are preferable. Film formation by these methods can be performed under conditions well known to those skilled in the art. After the film formation, the solvent may be removed by vacuum and heat drying, and the polymerization reaction by light and high temperature (200 ° C. or higher) heating is unnecessary. Therefore, performance degradation due to light and high temperature heating is suppressed.
- the hole injecting / transporting layer film forming solution only needs to contain at least one aromatic amine derivative, and in addition to the aromatic amine derivative, other hole transporting materials, electron transporting materials, light emitting materials, acceptor materials In addition, additives such as a solvent and a stabilizer may be included.
- the content of the aromatic amine derivative in the film-forming solution is preferably 20 to 100% by weight, more preferably 51% to 100% by weight, based on the total weight of the composition excluding the solvent. It may be the main component of the composition excluding the solvent.
- the proportion of the solvent is preferably 1% by weight to 99.9% by weight of the film forming solution, and more preferably 80% by weight to 99% by weight.
- the “main component” means that the content of the aromatic amine derivative is 50% by mass or more.
- the film-forming solution includes additives for adjusting viscosity and / or surface tension, such as thickeners (high molecular weight compounds, poor solvents for aromatic amine derivatives, etc.), viscosity reducing agents (low molecular weight compounds, etc.) Further, it may contain a surfactant or the like. Moreover, in order to improve storage stability, you may contain antioxidants which do not influence the performance of organic EL elements, such as a phenolic antioxidant and phosphorus antioxidant.
- Examples of the solvent for the film-forming solution include chlorinated solvents such as chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene and o-dichlorobenzene, ethers such as tetrahydrofuran, dioxane, dioxolane and anisole. Solvents; aromatic hydrocarbon solvents such as toluene and xylene; cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n-decane, etc.
- chlorinated solvents such as chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene and o-dichlorobenzene
- ethers such as tetrahydrofur
- Aliphatic hydrocarbon solvents such as acetone, methyl ethyl ketone, cyclohexanone, benzophenone, and acetophenone; Ester solvents such as ethyl acetate, butyl acetate, ethyl cellosolve acetate, methyl benzoate, and phenyl acetate; ethylene glycol , Ethylene glycol monobutyl Ethers, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerin, 1,2-hexanediol and other polyhydric alcohols and derivatives thereof; methanol, Examples include alcohol solvents such as ethanol, propanol, isopropanol, and cyclohexanol; sulfoxide solvents such as dimethyl sulfoxide;
- organic solvents can be used alone or in combination.
- aromatic hydrocarbon solvents ethylbenzene, diethylbenzene, trimethylbenzene, n-propylbenzene, isopropylbenzene, n-butylbenzene, isobutylbenzene, 5-butylbenzene, n-hexylbenzene, cyclohexylbenzene, 1-methylnaphthalene, tetralin, 1, 3-dioxane, 1,4-dioxane, 1,3-dioxolane, anisole, ethoxybenzene, cyclohexane, bicyclohexyl, cyclohexenylcyclohexanan
- the present invention is not limited to these, and a known method is used. Can be painted separately.
- a pattern may be formed using a metal mask.
- a pattern may be formed by a known laser transfer method.
- the above-mentioned organic EL element can be used for a flat light emitter such as a flat panel display of a wall-mounted television, a copying machine, a printer, a light source such as a backlight of a liquid crystal display or instruments, a display board, a marker lamp, and the like.
- a flat light emitter such as a flat panel display of a wall-mounted television, a copying machine, a printer, a light source such as a backlight of a liquid crystal display or instruments, a display board, a marker lamp, and the like.
- Example 1 Into a glass bottle, 0.01 g of H-3 as the component (A), 0.001 g of D-2 as the component (B), and 1 g of toluene as the component (C) were stirred to prepare a composition. It was visually confirmed that there was no insoluble matter in the solution.
- Examples 2 to 17 A composition was prepared in the same manner as in Example 1 except that the components (A) to (C) shown in Table 1 were used. All confirmed visually that there was no insoluble matter in the solution.
- Example 18 A 25 mm ⁇ 75 mm ⁇ 1.1 mm thick glass substrate with an ITO transparent electrode (manufactured by Geomatic) was subjected to ultrasonic cleaning for 5 minutes in isopropyl alcohol and then UV ozone cleaning for 30 minutes.
- polyethylenedioxythiophene / polystyrene sulfonic acid PEDOT: PSS was formed to a thickness of 40 nm by a spin coating method to form a hole injection layer.
- a xylene solution of HT2 (1 wt%) was formed into a film with a thickness of 20 nm by a spin coating method and dried by heating at 230 ° C. to form a hole transport layer.
- a 90:10 weight ratio toluene solution (1.0 wt%) of the host compound H-3 and the dopant compound D-2 was prepared, and formed into a film with a thickness of 50 nm by a spin coat method.
- a light emitting layer was formed by drying.
- ET1 having a thickness of 20 nm was formed on the light emitting layer by vapor deposition.
- This layer functions as an electron injection layer.
- Li Li source: manufactured by Saesgetter
- Alq which are electron donating dopants
- Alq were vapor-deposited to form an Alq: Li film as an electron injection layer (cathode).
- Metal Al was vapor-deposited on the Alq: Li film to form a metal cathode, and an organic EL device was produced.
- the light emission chromaticity (CIEx, y) was measured with a spectral radiance meter (CS-1000, manufactured by Minolta).
- the method for measuring the external quantum yield is as follows. A current with a current density of 10 mA / cm 2 was passed through the obtained organic EL device, the emission spectrum was measured with a spectral radiance meter (CS1000: manufactured by Minolta), and the external quantum yield was calculated by the following formula (1). .
Abstract
Description
また、塗布膜形成用発光性インクに用いられる発光材料としては、例えば、特許文献3に開示されているアントラセン誘導体が知られている。
しかしながら、発光効率が十分ではなく、より高い発光効率が得られるインク組成物が求められている。
下記の(A)成分、(B)成分及び(C)成分を含むインク組成物。
(A)成分 下記の式(A1)で表されるアントラセン誘導体
(B)成分 下記の式(B1)で表される芳香族アミン誘導体
ただし、Ar1~Ar4のうち少なくとも1つは下記の式(B1’)で表される複素環基である。)
(C)成分 下記の式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である溶媒
(A)成分 式(A1)で表されるアントラセン誘導体
(B)成分 式(B1)で表される芳香族アミン誘導体
(C)成分 式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である溶媒
以下、各成分について説明する。
(A)成分は下記の式(A1)で表されるアントラセン誘導体である。
式(A1)において、Lはアントラセン骨格の3員環におけるいずれの結合位置に結合していてもよい。また、A1及びA2もアントラセン骨格の3員環におけるいずれの結合位置に結合していてもよい。
式(A2)において、Lはアントラセン骨格の3員環におけるいずれの結合位置に結合していてもよい。
s及びtは、好ましくはそれぞれ0~2の整数である。
これらの置換基には、上記の置換基によってさらに置換されてもよい。また、これらの置換基は複数が互いに結合して環を形成してもよい。
環形成炭素数6~50のアリール基の例としては、フェニル、2-ビフェニリル、3-ビフェニリル、4-ビフェニリル、ターフェニリル、3,5-ジフェニルフェニル、3,5-ジ(1-ナフチル)フェニル、3,5-ジ(2-ナフチル)フェニル、3,4-ジフェニルフェニル、ペンタフェニルフェニル、4-(2,2-ジフェニルビニル)フェニル、4-(1,2,2-トリフェニルビニル)フェニル、フルオレニル、1-ナフチル、2-ナフチル、4-(1-ナフチル)フェニル、4-(2-ナフチル)フェニル、3-(1-ナフチル)フェニル、3-(2-ナフチル)フェニル、9-アントリル、2-アントリル、9-フェナントリル、1-ピレニル、クリセニル、ナフタセニル、コロニル等が挙げられる。
環形成炭素数6~50のアリーレン基としては上記のアリール基に対応する2価の基が挙げられる。
環形成原子数6~50のヘテロアリーレン基としては、上記のヘテロアリール基に対応する2価の基が挙げられる。
ガラス転移点は、好ましくは135℃以上であり、より好ましくは140℃以上である。ガラス転移点は、示差走査熱量計を用いて測定する。
具体的な化合物のガラス転移点を以下に示す。
H-3(Tg=141℃)、H-4(Tg=157℃)、H-26(Tg=150℃)、H-27(Tg=158℃)、BHa(Tg=130℃)
(B)成分は、下記の式(B1)で表される芳香族アミン誘導体である。
ただし、Ar1~Ar4のうち少なくとも1つは下記の式(B1’)で表される複素環基である。
R21~R27及びR31~R37は、それぞれ水素原子又は置換基であり、R21~R27及びR31~R37は隣接する置換基同士で飽和又は不飽和の環を形成してもよい。
X2及びX3は、それぞれ酸素原子又は硫黄原子である。
X2及びX3は酸素原子であると好ましい。
これらの置換基には、上記の置換基によってさらに置換されてもよい。また、これらの置換基は複数が互いに結合して環を形成してもよい。
アルキル基としては、メチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、s-ブチル基、イソブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基、n-ヘプチル基、n-オクチル基等が挙げられ、アルキレン基とアリール基等を組み合わせた置換基(例えば、フェニルメチル基、2-フェニルイソプロピル基等)でもよい。
上記炭素数は、1~10が好ましく、1~6がさらに好ましい。中でもメチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、s-ブチル基、イソブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基が好ましい。
好ましくは、1-ジベンゾフラニル基、2-ジベンゾフラニル基、3-ジベンゾフラニル基、4-ジベンゾフラニル基、1-ジベンゾチオフェニル基、2-ジベンゾチオフェニル基、3-ジベンゾチオフェニル基、4-ジベンゾチオフェニル基、1-カルバゾリル基、2-カルバゾリル基、3-カルバゾリル基、4-カルバゾリル基、9-カルバゾリル基である。
ハロゲン化アルキル基として、フルオロメチル基、ジフルオロメチル基、トリフルオロメチル基、フルオロエチル基、トリフルオロメチルメチル基等が挙げられる。
(C)成分である溶媒は、下記の式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である。
nは好ましくは1以上3以下の整数である。
炭素数1~20のアルキル基としては、メチル基、エチル基、プロピル基、イソプロピル基、n-ブチル基、s-ブチル基、イソブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基、n-ヘプチル基、n-オクチル基等が挙げられる。
環形成炭素数3~10のシクロアルキル基としては、シクロプロピル基、シクロブチル基、シクロペンチル基、シクロヘキシル基、4-メチルシクロヘキシル基、アダマンチル基、ノルボルニル基等が挙げられる。
エーテル結合含有基は、メトキシ基、エトキシ基、プロポキシル基、フェノキシ基が挙げられる。
カルボニル結合含有基としては、ベンゾイル基等が挙げられる。
エステル結合含有基としては、メチルエステル基、エチルエステル基、プロピルエステル基が挙げられる。
沸点が110℃以上であると水分を除去できるため好ましい。
有機EL素子は、水分により著しく性能が劣化するおそれがあるため、水への溶解性が低い溶媒が望ましい。
通常、有機EL素子の発光層膜厚は10~100nmであるが、一般的には50nmの場合が多い。50nm以上であれば発光性能や色調を安定化することができる。
上記のインク組成物を有機EL素子に用いる場合、50nm以上の膜厚を容易に形成するには0.5wt%以上の溶液濃度であることが好ましい。0.5wt%以上であれば問題なく成膜することができる。
本技術の一実施形態の有機EL素子は、陰極と陽極の間に少なくとも発光層を含む1以上の有機薄膜層が挟持され、発光層が上記のインク組成物を使用して成膜したものである。
上記の有機EL素子は、陰極30と陽極10間に、正孔注入層22、発光層24、電子注入層26が挟持されている。発光層24が上記のインク組成物を使用して形成したものである。
(1)陽極/発光層/陰極
(2)陽極/正孔注入層/発光層/陰極
(3)陽極/発光層/電子注入層/陰極
(4)陽極/正孔注入層/発光層/電子注入層/陰極(図1)
(5)陽極/正孔注入層/正孔輸送層/発光層/電子注入層/陰極
(6)陽極/正孔注入層/発光層/正孔阻止層/電子注入層/陰極
(7)陽極/正孔注入層/正孔輸送層/発光層/正孔阻止層/電子注入層/陰極
等の構造を挙げることができるが、これらに限定されるものではない。
これらの中で通常(5)の構成が好ましく用いられる。
上記のインク組成物を使用して成膜した有機薄膜は、上記のどの有機層に用いられてもよいが、これらの構成要素の中の発光帯域もしくは正孔輸送帯域に含有されていることが好ましい。
(i)注入機能;電界印加時に陽極又は正孔注入層より正孔を注入することができ、陰極又は電子注入層より電子を注入することができる機能、
(ii)輸送機能;注入した電荷(電子と正孔)を電界の力で移動させる機能、(iii)発光機能;電子と正孔の再結合の場を提供し、これを発光につなげる機能
ただし、正孔の注入されやすさと電子の注入されやすさに違いがあってもよく、また正孔と電子の移動度で表される輸送能に大小があってもよいが、どちらか一方の電荷を移動することが好ましい。
また、樹脂等の結着剤と材料化合物とを溶剤に溶かして溶液とした後、これをスピンコート法等により薄膜化することによっても、発光層を形成することができる。
基板としてはガラス板、ポリマー板等を用いることができる。
ガラス板としては、特にソーダ石灰ガラス、バリウム・ストロンチウム含有ガラス、鉛ガラス、アルミノケイ酸ガラス、ホウケイ酸ガラス、バリウムホウケイ酸ガラス、石英等が挙げられる。また、ポリマー板としては、ポリカーボネート、アクリル、ポリエチレンテレフタレート、ポリエーテルサルフォン、ポリサルフォン等を挙げることができる。
陽極は例えば導電性材料からなり、4eVより大きな仕事関数を有する導電性材料が適している。
上記導電性材料としては、炭素、アルミニウム、バナジウム、鉄、コバルト、ニッケル、タングステン、銀、金、白金、パラジウム等及びそれらの合金、ITO基板、NESA基板に使用される酸化スズ、酸化インジウム等の酸化金属、さらにはポリチオフェンやポリピロール等の有機導電性樹脂が挙げられる。
陽極は、必要があれば2層以上の層構成により形成されていてもよい。
陰極は例えば導電性材料からなり、4eVより小さな仕事関数を有する導電性材料が適している。
上記導電性材料としては、マグネシウム、カルシウム、錫、鉛、チタニウム、イットリウム、リチウム、ルテニウム、マンガン、アルミニウム、フッ化リチウム等及びこれらの合金が挙げられるが、これらに限定されるものではない。
また、上記合金としては、マグネシウム/銀、マグネシウム/インジウム、リチウム/アルミニウム等が代表例として挙げられるが、これらに限定されるものではない。合金の比率は、蒸着源の温度、雰囲気、真空度等により制御され、適切な比率に選択される。
陰極は、必要があれば2層以上の層構成により形成されていてもよく、陰極は上記導電性材料を蒸着やスパッタリング等の方法により薄膜を形成させることにより、作製することができる。
また、陰極としてのシート抵抗は数百Ω/□以下が好ましく、膜厚は通常10nm~1μmであり、好ましくは50nm~200nmである。
正孔注入・輸送層は、発光層への正孔注入を助け、発光領域まで輸送する層であって、正孔移動度が大きく、イオン化エネルギーが通常5.6eV以下と小さい層である。
正孔注入・輸送層の材料としては、より低い電界強度で正孔を発光層に輸送する材料が好ましく、さらに正孔の移動度が、例えば104 V/cm~106 V/cmの電界印加時に、少なくとも10-4cm2 /V・秒であれば好ましい。
また、p型Si、p型SiC等の無機化合物も正孔注入材料として使用することができる。
電子注入・輸送層は、発光層への電子の注入を助け、発光領域まで輸送する層であって、電子移動度が大きい層である。
有機EL素子は発光した光が電極(例えば陰極)により反射するため、直接陽極から取り出される発光と、電極による反射を経由して取り出される発光とが干渉することが知られている。この干渉効果を効率的に利用するため、電子注入・輸送層は数nm~数μmの膜厚で適宜選ばれるが、特に膜厚が厚いとき、電圧上昇を避けるために、104 V/cm~106 V/cmの電界印加時に電子移動度が少なくとも10-5cm2 /Vs以上であることが好ましい。
本技術の有機EL多色発光装置における層間絶縁膜は、主に、各発光素子(発光層)を分離することを目的に用いられるが、その他、高精細な電極のエッジの平坦化、有機EL素子の下部電極と上部電極との間の電気絶縁(短絡防止)に用いられる。
層間絶縁膜に用いられる構成材料としては、通常、アクリル樹脂、ポリカーボネート樹脂、ポリイミド樹脂等の有機材料、酸化ケイ素(SiO2 又はSiOx )、酸化アルミニウム(Al2 O3 又はAlOx )、酸化チタン(TiO2 )、窒化シリコン(Si3 N4 )、窒化シリコン酸化物(SiOx Ny )等の無機酸化物が挙げられる。
層間絶縁膜は、上記構成材料に感光性基を導入してフォトリソグラフィー法で所望のパターンに加工するか、印刷手法にて所望のパターンに形成することが好ましい。
本技術の有機EL多色発光装置の各層の形成は、真空蒸着、スパッタリング、プラズマ、イオンプレーティング等の公知の乾式成膜法やスピンコート法、キャスティング法、マイクログラビアコート法、グラビアコート法、バーコート法、ロールコート法、スリットコート法、ワイアーバーコート法、ディップコート法、スプレーコート法、スクリーン印刷法、フレキソ印刷法、オフセット印刷法、インクジェット法、ノズルプリンティング法等の公知の湿式成膜法を適用することができ、パターン形成をする場合には、スクリーン印刷法、フレキソ印刷法、オフセット印刷法、インクジェット印刷法等の方法を適用することができる。
各層の膜厚は特に限定されるものではないが、適切な膜厚に設定する必要がある。膜厚が厚すぎると、一定の光出力を得るために大きな印加電圧が必要になり効率が悪くなる。膜厚が薄すぎるとピンホール等が発生して、電界を印加しても充分な発光輝度が得られない。通常の膜厚は5nm~10μmの範囲が適しているが、10nm~0.2μmの範囲がさらに好ましい。
成膜後、真空、加熱乾燥して、溶媒を除去すればよく、光、高温(200℃以上)加熱による重合反応は不要である。従って、光、高温加熱による性能劣化は抑制される。
成膜用溶液中の芳香族アミン誘導体の含有量は、溶媒を除いた組成物の全重量に対して好ましくは20~100重量%であり、より好ましくは51重量%~100重量%であり、溶媒を除いた組成物の主成分であるとよい。溶媒の割合は、成膜用溶液の1重量%~99.9重量%が好ましく、80重量%~99重量%がより好ましい。
尚、「主成分」とは、芳香族アミン誘導体の含有量が50質量%以上であることを意味する。
これらのうち、溶解性、成膜の均一性、粘度特性等の観点から、芳香族炭化水素系溶媒、エーテル系溶媒、脂肪族炭化水素系溶媒、エステル系溶媒、ケトン系溶媒が好ましく、トルエン、キシレン、エチルベンゼン、ジエチルベンゼン、トリメチルベンゼン、n-プロピルベンゼン、イソプロピルベンゼン、n-ブチルベンゼン、イソブチルベンゼン、5-ブチルベンゼン、n-へキシルベンゼン、シクロへキシルベンゼン、1-メチルナフタレン、テトラリン、1,3-ジオキサン、1,4-ジオキサン、1,3-ジオキソラン、アニソール、エトキシベンゼン、シクロへキサン、ビシクロへキシル、シクロヘキセニルシクロヘキサノン、n-ヘプチルシクロへキサン、n-へキシルシクロヘキサン、デカリン、安息香酸メチル、シクロへキサノン、2-プロピルシクロへキサノン、2-へプタノン、3-へプタノン、4-へプタノン、2-オクタノン、2-ノナノン、2-デカノン、ジシクロへキシルケトン、アセトフェノン、ベンゾフェノンが好ましい。
実施例1
(A)成分として0.01gのH-3、(B)成分として0.001gのD-2、及び(C)成分として1gのトルエンをガラス瓶にとり撹拌し、組成物を調製した。目視で溶液中に不溶物が無いことを確認した。
(A)~(C)成分として表1に記載のものを用いた以外は実施例1と同様にして組成物を調製した。いずれも目視で溶液中に不溶物が無いことを確認した。
25mm×75mm×1.1mm厚のITO透明電極付きガラス基板(ジオマティック社製)をイソプロピルアルコール中で、5分間の超音波洗浄を行なった後、UVオゾン洗浄を30分間行なった。
その基板の上に、スピンコート法でポリエチレンジオキシチオフェン/ポリスチレンスルホン酸(PEDOT:PSS)を40nmの膜厚で成膜し、正孔注入層とした。
この後、電子供与性ドーパントであるLi(Li源:サエスゲッター社製)とAlqを二元蒸着させ、電子注入層(陰極)としてAlq:Li膜を形成した。
このAlq:Li膜上に金属Alを蒸着させ、金属陰極を形成し、有機EL素子を作製した。
得られた有機EL素子に電流密度10mA/cm2 の電流を通電し、分光放射輝度計(CS1000:ミノルタ製)で発光スペクトルを測定し、下記の数式(1)により外部量子収率を算出した。
実施例18と同様にして有機EL素子を作製し、評価した。結果を表2に示す。
また、ドーパントとしてD-2を用いても、ホスト材料(成分(A))として、式(A1)で表される構造を有していないBHaを用いた比較例2では、発光効率が低下している。これは、ホスト材料であるBHaのガラス転移点(Tg:130℃)が低く、成膜性に劣ったためと推測する。一方、本技術のホストはTgが高い(H-10のTg:157℃、H-16のTg:162℃)。
Claims (22)
- 下記の(A)成分、(B)成分及び(C)成分を含む、
インク組成物。
(A)成分 下記の式(A1)で表されるアントラセン誘導体
(B)成分 下記の式(B1)で表される芳香族アミン誘導体
ただし、Ar1~Ar4のうち少なくとも1つは下記の式(B1’)で表される複素環基である。)
(C)成分 下記の式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である溶媒
- 前記式(A1)において、l及びmがそれぞれ1である、
請求項1に記載のインク組成物。 - A1及びA2が、それぞれ、置換もしくは無置換のフェニル基、置換もしくは無置換のビフェニル基、置換もしくは無置換のターフェニル基、置換もしくは無置換のナフチル基、置換もしくは無置換のフルオランテニル基、置換もしくは無置換のアントリル基、置換もしくは無置換のフェナントリル基、置換もしくは無置換のピレニル基、置換もしくは無置換のクリセニル基、置換もしくは無置換のフルオレニル基、置換もしくは無置換のトリフェニレニル基、置換もしくは無置換のピリジニル基、置換もしくは無置換のピラジニル基、置換もしくは無置換のインドリル基、置換もしくは無置換のフリル基、置換もしくは無置換のベンゾフラニル基、置換もしくは無置換のジベンゾフラニル基、置換もしくは無置換のジベンゾチオフェニル基、又は置換もしくは無置換のカルバゾリル基である、
請求項1に記載のインク組成物。 - Lが、置換もしくは無置換のフェニレン基、置換もしくは無置換のビフェニリレン基、置換もしくは無置換のターフェニリレン基、置換もしくは無置換のナフチレン基、置換もしくは無置換のフルオランテニレン基、置換もしくは無置換のアントリレン基、置換もしくは無置換のフェナントリレン基、置換もしくは無置換のピレニレン基、置換もしくは無置換のクリセニレン基、置換もしくは無置換のフルオレニレン基、置換もしくは無置換のトリフェニレニレン基、置換もしくは無置換のピリジニレン基、置換もしくは無置換のピラジニレン基、置換もしくは無置換のフリレン基、置換もしくは無置換のベンゾフラニレン基、置換もしくは無置換のジベンゾフラニレン基、置換もしくは無置換のジベンゾチオフェニレン基、置換もしくは無置換のカルバゾリレン基である、
請求項1に記載のインク組成物。 - Ra及びRbが、それぞれ置換もしくは無置換の環形成炭素数6~50のアリール基、置換もしくは無置換の炭素数1~50のアルキル基、置換もしくは無置換の炭素数1~50のアルコキシ基、置換もしくは無置換の炭素数7~50のアラルキル基、置換もしくは無置換の環形成原子数5~50のアリールオキシ基、ハロゲン基、又はシアノ基である、
請求項6に記載のインク組成物。 - 前記(B)成分におけるR1~R8、R11~R17、R21~R27及びR31~R37の置換基が、それぞれハロゲン原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環形成炭素数3~10のシクロアルキル基、置換もしくは無置換のシリル基、シアノ基又は置換もしくは無置換の炭素数6~30のアリール基である、
請求項1に記載のインク組成物。 - 前記式(B2)において、Ar2及びAr4が、それぞれ置換もしくは無置換の環形成炭素数6~30のアリール基である、
請求項9に記載のインク組成物。 - 前記式(B2)において、Ar2及びAr4が、それぞれ置換もしくは無置換のフェニル基である、
請求項9に記載のインク組成物。 - 前記式(B2)において、R27及びR37が、それぞれ置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換のシリル基、置換もしくは無置換の環形成炭素数6~20のアリール基であり、R21~R26及びR31~R36が水素原子である、
請求項9に記載のインク組成物。 - 前記式(B2)において、R1~R8が水素原子である、
請求項9に記載のインク組成物。 - 前記式(B2)において、R2がハロゲン原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環形成炭素数3~10のシクロアルキル基、置換もしくは無置換のシリル基、又は置換もしくは無置換の環形成炭素数6~30のアリール基であり、R1、R3~R8が水素原子である、
請求項9に記載のインク組成物。 - 前記式(B2)において、R2、R6がそれぞれハロゲン原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環形成炭素数3~10のシクロアルキル基、置換もしくは無置換のシリル基、又は置換もしくは無置換の環形成炭素数6~30のアリール基であり、R1、R3、R4、R5、R7、R8が水素原子である、
請求項9に記載のインク組成物。 - 前記式(B1)におけるX1、又は前記式(B2)におけるX2及びX3が酸素原子である、
請求項1に記載のインク組成物。 - 前記式(C1)において、Rが炭素数1~20のアルキル基、環形成炭素数3~10のシクロアルキル基、エーテル結合含有基、カルボニル結合含有基、又はエステル結合含有基である、
請求項1に記載のインク組成物。 - 前記(C)成分がトルエン又はキシレンである、
請求項1に記載のインク組成物。 - 前記(A)成分の含有量が0.5wt%以上であり、前記(B)成分の含有量が0.001wt%以上である、
請求項1に記載のインク組成物。 - 陰極と陽極の間に少なくとも発光層を含む1以上の有機薄膜層が挟持され、前記発光層としてインク組成物を用いて作製された有機薄膜を含み、
前記インク組成物は、下記の(A)成分、(B)成分及び(C)成分を含む、
有機エレクトロルミネッセンス素子。
(A)成分 下記の式(A1)で表されるアントラセン誘導体
(B)成分 下記の式(B1)で表される芳香族アミン誘導体
ただし、Ar1~Ar4のうち少なくとも1つは下記の式(B1’)で表される複素環基である。)
(C)成分 下記の式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である溶媒
- 有機エレクトロルミネッセンス素子を搭載し、
前記有機エレクトロルミネッセンス素子は、陰極と陽極の間に少なくとも発光層を含む1以上の有機薄膜層が挟持され、前記発光層としてインク組成物を用いて作製された有機薄膜を含み、
前記インク組成物は、下記の(A)成分、(B)成分及び(C)成分を含む、
電子機器。
(A)成分 下記の式(A1)で表されるアントラセン誘導体
(B)成分 下記の式(B1)で表される芳香族アミン誘導体
ただし、Ar1~Ar4のうち少なくとも1つは下記の式(B1’)で表される複素環基である。)
(C)成分 下記の式(C1)で表され、沸点が110℃以上であり、水への溶解度が1wt%以下である溶媒
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