Film-forming ink, film-forming method, method of manufacturing light emitting element, light emitting element, light emitting device, and electronic apparatus
A film-forming ink according to an embodiment of the invention includes a film-forming material; and a liquid medium which dissolves or disperses the film-forming material, in which the liquid medium contains an ether compound represented by Formula (I).
1. A film-forming ink, comprising:
a film-forming material that comprises a semiconductor or a metal; and
a liquid medium which dissolves or disperses the film-forming material,
wherein the liquid medium has a surface tension of 35 dyn/cm or less and a viscosity of less than or equal to 2 cP at normal temperature, and contains an aromatic hydrocarbon compound and an ether compound represented by Formula (I):
wherein in Formula (I),
R 1 and R 2 each independently represent a linear alkyl group, a branched alkyl group, or a cyclic alkyl group which has 1 to 4 carbon atoms,
R 3 represents an alkylene group having 1 to 3 carbon atoms, and
n =2 to 4.
2. The film-forming ink according to claim 1 , wherein in Formula (I), the number of carbon atoms in R 3 is 2 or 3.
3. The film-forming ink according to claim 1 , wherein a content of the ether compound in the liquid medium is 0.1 wt % to 20 wt %.
4. The film-forming ink according to claim 1 , wherein the film-forming material contains a π-conjugated compound.
5. The film-forming ink according to claim 1 , wherein the film-forming material contains a metal complex.
6. The film-forming ink according to claim 1 , wherein the film-forming material is soluble in a non-aqueous solvent.
7. The film-forming ink according to claim 6 , wherein the film-forming material is a material constituting an organic layer of an organic electroluminescence element, or a precursor thereof.
8. A film-forming method comprising:
applying the film-forming ink according to claim 1 to a substrate; and
removing the liquid medium from the film-forming ink to form a film.
9. A film-forming method comprising:
applying the film-forming ink according to claim 2 to a substrate; and
removing the liquid medium from the film-forming ink to form a film.
10. A method of manufacturing a light emitting element comprising:
applying the film-forming ink according to claim 1 to a substrate; and
removing the liquid medium from the film-forming ink to form an organic layer.
11. The film-forming ink according to claim 1 having a viscosity of 1 cP to 5 cP.
12. A film-forming ink, comprising:
a film-forming material that comprises a semiconductor or a metal; and
a liquid medium which dissolves or disperses the film-forming material,
wherein the liquid medium has a surface tension of 35 dyn/cm or less and a viscosity of less than or equal to 2 cP at normal temperature, and contains an ether compound represented by Formula (I):
where in Formula (I),
R 1 and R 2 each independently represent a linear alkyl group, a branched alkyl group, or a cyclic alkyl group which has 1 to 4 carbon atoms,
R 3 represents an alkylene group having 1 carbon atom, and
n represents an integer of 2 to 4.