Organic compositions for depositing onto fluorinated surfaces
View Patent ↗Emulsions comprising an active material, a solvent for dissolving the active material, and a wetting fluid, wherein the active material is sparingly soluble in the wetting fluid, are provided, and methods for making the same.
1. An emulsified composition comprising:
a) a solution comprising an active material and a solvent, wherein the active material is dissolved in the solvent, and wherein the solution has a particle size of less than 1 micron in diameter on average; and
b) a wetting fluid, wherein the active material is sparingly soluble in the wetting fluid;
wherein the solution is stably dispersed throughout the wetting fluid and wherein the active material is selected from the group consisting of a photoactive material, charge transport material, light-emitting material, or a hole-transport material.
2. The composition of claim 1 , wherein the active material is soluble in the solvent in a range of about 0.05% to about 6% by weight of the active material.
3. The composition of claim 1 , wherein the active material is soluble in the solvent in a range of about 0.1% to about 3% by weight of the active material.
4. The composition of claim 1 , wherein about 2% of the active material is dissolved in the solvent.
5. The composition of claim 1 , wherein the solvent is an aromatic ether, an aromatic hydrocarbon, tetrahydrofuran, methylene chloride, or mixtures thereof.
6. The composition of claim 1 , wherein the wetting fluid has a surface energy of less than 25 dyne/cm.
7. The composition of claim 1 , wherein the wetting fluid has a surface energy of less than 18 dyne/cm.
8. The composition of claim 1 , wherein the wetting fluid is hexane, isopropyl alcohol, or 1,3-bis(trifluoromethyl)benzene.
9. A method of preparing the composition of claim 1 , comprising:
forming a solution of active material and solvent; and
dispersing the solution in a wetting fluid.
10. The method of claim 9 , wherein dispersion is by agitation.
11. A method of preparing the composition of claim 1 , comprising:
forming a solution of active material and solvent;
dispersing the solution in a wetting fluid; and
emulsifying the dispersion.
12. The method of claim 11 , wherein dispersion is by agitation.
13. The method of claim 11 , wherein the emulsification is performed with a microfluidizer.