Compositions and methods including depositing nanomaterial
View Patent ↗An ink composition comprising a nanomaterial and a liquid vehicle, wherein the liquid vehicle includes a composition including one or more functional groups that are capable of being cross-linked is disclosed. An ink composition comprising a nanomaterial, a liquid vehicle, and scatterers is also disclosed. An ink composition including a nanomaterial and a liquid vehicle, wherein the liquid vehicle includes a perfluorocompound is further disclosed. A method for inkjet printing an ink including nanomaterial and a liquid vehicle with a surface tension that is not greater than about 25 dyne/cm is disclosed. In certain preferred embodiments, the nanomaterial includes semiconductor nanocrystals. Devices prepared from inks and methods of the invention are also described.
1. An ink composition comprising:
a light emissive nanomaterial comprising a plurality of quantum confined semiconductor nanocrystals capable of emitting light,
a plurality of scattering particles, and
a non-polar organic solvent liquid vehicle.
2. An ink composition in accordance with claim 1 wherein the scattering particles comprise metal or metal oxide particles, air bubbles, solid glass beads, or hollow glass beads.
3. An ink composition in accordance with claim 1 wherein the scattering particles comprise TiO 2 , SiO 2 , BaTiO 3 , and ZnO.
4. An ink composition in accordance with claim 1 wherein at least a portion of the scattering particles have a spherical shape.
5. An ink composition in accordance with claim 1 wherein the scattering particles have a spherical shape.
6. An ink composition in accordance with claim 1 wherein at least a portion of the scattering particles include a surface-treatment to improve dispersability and stability in the liquid medium.
7. An ink composition in accordance with claim 1 wherein the scattering particles comprise particles of TiO 2 with an average particle size of 0.2 μm.
8. An ink composition in accordance with claim 1 wherein the concentration of scattering particles is in a range from 0.001% and 20% by weight.
9. An ink composition in accordance with claim 1 wherein the concentration of scattering particles is in a range from 0.1% and 10% by weight.
10. An ink composition in accordance with claim 1 wherein the concentration of scattering particles is in a range from 0.1% and 3% by weight.
11. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 0.1 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
12. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 1 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
13. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 5 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
14. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 10 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
15. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 25 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
16. An ink composition in accordance with claim 1 wherein the ink composition includes at least about 50 mg of quantum confined semiconductor nanocrystals per ml of liquid vehicle.
17. An ink composition in accordance with claim 1 wherein at least a portion of the quantum confined semiconductor nanocrystals comprise a core/shell structure.
18. An ink composition in accordance with claim 1 wherein the ink composition comprises a dispersion.
19. An ink composition in accordance with claim 1 wherein the ink composition comprises a colloidal dispersion.
20. A device comprising an ink composition in accordance with claim 1 .