Composition for electronic devices, ink for electronic devices, and method for producing electronic device
The present invention addresses the problem of providing: a composition for electronic devices in which when a film is formed therefrom, the amount of residual solvents including fluorine-containing solvents within the film is reduced, the effects of residual solvents on a device are minimized, and it is thus possible to achieve high element performance; an ink for electronic devices that is suitable for wet processes and that makes it possible to achieve high liquid stability and element performance as a result of containing the composition for electronic devices; and a method for producing an electronic device. This composition for electronic devices contains a component A and a component B and is characterized in that the component A is a fluorine-containing solvent and the component B is a compound having a structure represented by general formula (1).
1. A composition for an electronic device consisting of a component A, a component B, and optionally a component C which is a solvent or a solute, wherein the component A is a fluorine-containing solvent, and the component B is a compound having a structure represented by the following Formula (1),
wherein X 1 to X 9 each independently represent —CW m or a nitrogen atom, m of —CW m represents 1 to 9, and the substituents —CW 1 to —CW 9 correspond to X 1 to X 9 , respectively; W 1 to W 9 each independently represent a hydrogen atom or a substituent; when L 1 and L 2 are not linked to each other, L 1 and L 2 each independently represent a hydrogen atom or a substituent W m1 , m of W m1 represents 1 or 2, the substituents W 11 and W 21 correspond to L 1 and L 2 , respectively; L 1 and L 2 may be linked to each other, in which case L 1 and L 2 are linked to each other via any one atom of oxygen, sulfur, carbon and nitrogen to form a 6-membered ring; in the case of a carbon atom, it represents CS 1 S 2 ; in the case of a nitrogen atom, it represents NR 1 ; L 3 and L 4 each independently represent an oxygen atom, a sulfur atom, —CS n1 S n2 , or —NR n3 , n represents 3 or 4, —CS 31 S 32 or —NR 33 corresponds to L 3 , and —CS 41 S 42 or —NR 43 corresponds to L 4 ; and S 1 , S 2 , S 31 , S 32 , S 41 , S 42 , R 1 , R 33 , R 43 , W 11 and W 12 each independently represent a substituent, and
in a case where the component C is present in the composition, a Hansen solubility parameter distance (Ra 2 ) between the component A and the component B is longer than a Hansen solubility parameter distance (Ra 1 ) between all solvents in the composition for an electronic device and all solutes in the composition for an electronic device.
2. The composition for electronic devices described in claim 1 , wherein Ra 1 is 10 or less.
3. The composition for an electronic device described in claim 1 , wherein the component C contains an atom having an unshared electron pair.
4. The composition for an electronic device described in claim 3 , wherein the atom having an unshared electron pair of the component C is a nitrogen atom having an unshared electron pair that does not participate in aromaticity.
5. The composition for an electronic device described in claim 1 , wherein the component C is an alcohol.
6. The composition for an electronic device described in claim 1 , wherein any one of X 1 to X 9 , W m , R 1 , R 33 and R 43 of a compound having the structure represented by Formula (1) has one or more fluorine-containing solvent solubilizing groups, and the fluorine-containing solvent solubilizing group is a substituent having a fluorine atom or a nitrogen atom.
7. The composition for an electronic device described in claim 1 , being used as a composition for forming an electron transport layer or an electron injection layer of an organic electroluminescent element.
8. An ink for an electronic device, wherein the ink contains the composition for an electronic device described in claim 1 .
9. The ink for an electronic device described in claim 8 , wherein the ink for the electronic device is an inkjet printing ink.
10. A method of manufacturing an electronic device, wherein the ink for an electronic device described in claim 9 is discharged from an inkjet head to form a thin film for an electronic device.