Ink composition, organic electroluminescence element, and electronic apparatus

1. An ink composition comprising:

the following component (A);

the following component (B); and

the following component (C),

the component (A) being an anthracene derivative represented by the following formula (A1):

in the formula (A1), L is one of a substituted or unsubstituted terphenylylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted fluoranthenylene group, a substituted or unsubstituted phenanthrylene group, a substituted or unsubstituted pyrenylene group, a substituted or unsubstituted chrysenylene group, a substituted or unsubstituted fluorenylene group, a substituted or unsubstituted triphenylenylene group, substituted or unsubstituted pyridinylene group, a substituted or unsubstituted pyrazinylene group, a substituted or unsubstituted furylene group, a substituted or unsubstituted benzofuranylene group, a substituted or unsubstituted dibenzofuranylene group, a substituted or unsubstituted dibenzothiophenylene group, and a substituted or unsubstituted carbazolylene group, each of A1 and A2 is one of a substituted or unsubstituted aryl group including 6 to 50 ring-forming carbon atoms, and a heteroaryl group including 5 to 50 ring-forming atoms, each of l and m is an integer of 0 to 9, where when 1 is an integer of 2 or more, a plurality of A1's are the same as or different from one another, and when m is an integer of 2 or more, a plurality of A2's are the same as or different from one another,

the component (B) being an aromatic amine derivative represented by the following formula (B1):

in the formula (B1), each of R1 to R8 is one of a hydrogen atom and a substituent group, and each of Ar1 to Ar4 is one of a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms, and a substituted or unsubstituted heterocyclic group including 5 to 30 ring-forming atoms, where one or more of Ar1 to Ar4 are a heterocyclic group represented by the following formula (B1′),

in the formula (B1′), each of R11 to R17 is one of a hydrogen atom and a substituent group, adjacent substituent groups in R11 to R17 optionally form a saturated or unsaturated ring, and X1 is one of an oxygen atom and a sulfur atom, and

the component (C) being a solvent represented by the following formula (C1) and having a boiling point of 110° C. or higher and a solubility of 1 wt % or less in water:

in the formula (C1), R is a substituent group, and n is an integer of 1 to 6 both inclusive, where when n is 2 or more, a plurality of R's are the same as or different from one another.

2. The ink composition according to claim 1 , wherein in the formula (A1), each of l and m is 1.

3. The ink composition according to claim 1 , wherein the anthracene derivative is represented by the following formula (A2):

in the formula (A2), L, A1, and A2 are respectively the same as L, A1, and A2 in the formula (A1).

4. The ink composition according to claim 1 , wherein the anthracene derivative is represented by the following formula (A3):

in the formula (A3), L, A1, and A2 are respectively the same as L, A1, and A2 in the formula (A1).

5. The ink composition according to claim 1 , wherein each of A1 and A2 is one of a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted fluoranthenyl group, a substituted or unsubstituted anthryl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted chrysenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted indolyl group, a substituted or unsubstituted furyl group, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group.

6. The ink composition according to claim 1 , wherein the anthracene derivative is represented by the following formula (A4):

in the formula (A4), L is the same as L in the formula (A1), each of Ra and Rb is a substituent group, and each of s and t is an integer of 0 to 5, where when s is an integer of 2 or more, a plurality of Ra's are the same as or different from one another, and when t is an integer of 2 or more, a plurality of Rb's are the same as or different from one another.

7. The ink composition according to claim 6 , wherein each of Ra and Rb is one of a substituted or unsubstituted aryl group including 6 to 50 ring-forming carbon atoms, a substituted or unsubstituted alkyl group including 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group including 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group including 7 to 50 carbon atoms, a substituted or unsubstituted aryloxy group including 5 to 50 ring-forming atoms, a halogen group, and a cyano group.

8. The ink composition according to claim 1 , wherein the aromatic amine derivative is represented by the following expression (B2):

in the formula (B2), R1 to R8, Ar2, and Ar4 are respectively the same as R1 to R8, Ar2, and Ar4 in the formula (B1), each of R21 to R27 and R31 to R37 is one of a hydrogen atom and a substituent group, where adjacent substituent groups in R21 to R27, and R31 to R37 optionally form a saturated or unsaturated ring, and each of X2 and X3 is one of an oxygen atom and a sulfur atom.

9. The ink composition according to claim 8 , wherein in the formula (B2), each of Ar2 and Ar4 is a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms.

10. The ink composition according to claim 8 , wherein in the formula (B2), each of Ar2 and Ar4 is a substituted or unsubstituted phenyl group.

11. The ink composition according to claim 8 , wherein in the formula (B2), each of R27 and R37 is one of a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted silyl group, and a substituted or unsubstituted aryl group including 6 to 20 ring-forming carbon atoms, and each of R21 to R26 and R31 to R36 is a hydrogen atom.

12. The ink composition according to claim 8 , wherein in the formula (B2), each of R1 to R8 is a hydrogen atom.

13. The ink composition according to claim 8 , wherein in the formula (B2), R2 is one of a halogen atom, a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 10 ring-forming carbon atoms, a substituted or unsubstituted silyl group, and a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms, and each of R1 and R3 to R8 is a hydrogen atom.

14. The ink composition according to claim 8 , wherein in the formula (B2), each of R2 and R6 is one of a halogen atom, a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 10 ring-forming carbon atoms, a substituted or unsubstituted silyl group, and a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms, and each of R1, R3, R4, R5, R7, and R8 is a hydrogen atom.

15. The ink composition according to claim 1 , wherein each of substituent groups of R1 to R8, R11 to R17, R21 to R27, and R31 to R37 in the component (B) is one of a halogen atom, a substituted or unsubstituted alkyl group including 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group including 3 to 10 ring-forming carbon atoms, a substituted or unsubstituted silyl group, a cyano group, and a substituted or unsubstituted aryl group including 6 to 30 carbon atoms.

16. The ink composition according to claim 1 , wherein X1 in the formula (B1), or each of X2 and X3 in the formula (B2) is an oxygen atom.

17. The ink composition according to claim 1 , wherein in the formula (C1), R is one of an alkyl group including 1 to 20 carbon atoms, a cycloalkyl group including 3 to 10 ring-forming carbon atoms, an ether bond-containing group, a carbonyl bond-containing group, and an ester bond-containing group.

18. The ink composition according to claim 1 , wherein the component (C) is toluene or xylene.

19. The ink composition according to claim 1 , wherein the content of the component (A) is 0.5 wt % or more, and the content of the component (B) is 0.001 wt % or more.

20. An organic electroluminescence element provided with one or more organic thin film layers that are interposed between a cathode and an anode and include at least a light-emitting layer, the one or more organic thin film layers including an organic thin film as the light-emitting layer, and the organic thin film being formed with use of an ink composition, the ink composition comprising:

the following component (A);

the following component (B); and

the following component (C),

the component (A) being an anthracene derivative represented by the following formula (A1):

in the formula (A1), L is one of a substituted or unsubstituted terphenylylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted fluoranthenylene group, a substituted or unsubstituted phenanthrylene group, a substituted or unsubstituted pyrenylene group, a substituted or unsubstituted chrysenylene group, a substituted or unsubstituted fluorenylene group, a substituted or unsubstituted triphenylenylene group, substituted or unsubstituted pyridinylene group, a substituted or unsubstituted pyrazinylene group, a substituted or unsubstituted furylene group, a substituted or unsubstituted benzofuranylene group, a substituted or unsubstituted dibenzofuranylene group, a substituted or unsubstituted dibenzothiophenylene group, and a substituted or unsubstituted carbazolylene group, each of A1 and A2 is one of a substituted or unsubstituted aryl group including 6 to 50 ring-forming carbon atoms, and a heteroaryl group including 5 to 50 ring-forming atoms, each of l and m is an integer of 0 to 9, where when 1 is an integer of 2 or more, a plurality of A1's are the same as or different from one another, and when m is an integer of 2 or more, a plurality of A2's are the same as or different from one another,

the component (B) being an aromatic amine derivative represented by the following formula (B1):

in the formula (B1), each of R1 to R8 is one of a hydrogen atom and a substituent group, and each of Ar1 to Ar4 is one of a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms, and a substituted or unsubstituted heterocyclic group including 5 to 30 ring-forming atoms, where one or more of Ar1 to Ar4 are a heterocyclic group represented by the following formula (B1′),

in the formula (B1′), each of R11 to R17 is one of a hydrogen atom and a substituent group, adjacent substituent groups in R11 to R17 optionally form a saturated or unsaturated ring, and X1 is one of an oxygen atom and a sulfur atom, and

the component (C) being a solvent represented by the following formula (C1) and having a boiling point of 110° C. or higher and a solubility of 1 wt % or less in water:

in the formula (C1), R is a substituent group, and n is an integer of 1 to 6 both inclusive, where when n is 2 or more, a plurality of R's are the same as or different from one another.

21. An electronic apparatus provided with an organic electroluminescence element, the organic electroluminescence element including one or more organic thin film layers that are interposed between a cathode and an anode and include at least a light-emitting layer, the one or more organic thin film layers including an organic thin film as the light-emitting layer, and the organic thin film being formed with use of an ink composition, the ink composition comprising:

the following component (A);

the following component (B); and

the following component (C),

the component (A) being an anthracene derivative represented by the following formula (A1):

in the formula (A1), L is one of a substituted or unsubstituted terphenylylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted fluoranthenylene group, a substituted or unsubstituted phenanthrylene group, a substituted or unsubstituted pyrenylene group, a substituted or unsubstituted chrysenylene group, a substituted or unsubstituted fluorenylene group, a substituted or unsubstituted triphenylenylene group, substituted or unsubstituted pyridinylene group, a substituted or unsubstituted pyrazinylene group, a substituted or unsubstituted furylene group, a substituted or unsubstituted benzofuranylene group, a substituted or unsubstituted dibenzofuranylene group, a substituted or unsubstituted dibenzothiophenylene group, and a substituted or unsubstituted carbazolylene group, each of A1 and A2 is one of a substituted or unsubstituted aryl group including 6 to 50 ring-forming carbon atoms, and a heteroaryl group including 5 to 50 ring-forming atoms, each of l and m is an integer of 0 to 9, where when 1 is an integer of 2 or more, a plurality of A1's are the same as or different from one another, and when m is an integer of 2 or more, a plurality of A2's are the same as or different from one another,

the component (B) being an aromatic amine derivative represented by the following formula (B1):

in the formula (B1), each of R1 to R8 is one of a hydrogen atom and a substituent group, and each of Ar1 to Ar4 is one of a substituted or unsubstituted aryl group including 6 to 30 ring-forming carbon atoms, and a substituted or unsubstituted heterocyclic group including 5 to 30 ring-forming atoms, where one or more of Ar1 to Ar4 are a heterocyclic group represented by the following formula (B1′),

in the formula (B1′), each of R11 to R17 is one of a hydrogen atom and a substituent group, adjacent substituent groups in R11 to R17 optionally form a saturated or unsaturated ring, and X1 is one of an oxygen atom and a sulfur atom, and

the component (C) being a solvent represented by the following formula (C1) and having a boiling point of 110° C. or higher and a solubility of 1 wt % or less in water:

in the formula (C1), R is a substituent group, and n is an integer of 1 to 6 both inclusive, where when n is 2 or more, a plurality of R's are the same as or different from one another.