Back to results
US 10,093,819 B2Granted
Fluorosurfactant-containing ink compositions for inkjet printing
AssigneeKateeva, Inc.
InventorsInna Tregub, Rajsapan Jain, Michelle Chan
Life of this patent
Estimating the term…
Abstract
Ink compositions formulated for inkjet printing the hole injecting layer (HIL) or hole transporting layer (HTL) of an organic light emitting diode (OLED) are provided. The ink compositions comprise fluorosurfactants that prevent uncontrolled spreading of the printed ink compositions. Also provided are methods of inkjet printing the HILs or HTLs using the ink compositions.
Claims22
An ink composition comprising:
- at least 40 wt. % of an electrically conductive polythiophene;
- at least 5 wt. % of an aprotic organic solvent having a boiling point of at least 240 ° C., a viscosity of no greater than 15 cPs at 25 ° C. and a surface tension of no greater than 55 dyne/cm at 25 ° C.;
- and
- water.
1 more element
A method of forming a hole injecting layer for an organic light emitting diode, the method comprising:
- inkjet printing a droplet of an ink composition over an electrode layer in a pixel cell of an organic light emitting diode pixel bank, the ink composition comprising:
- at least 40 wt. % of an electrically conductive polythiophene;
- at least 5 wt. % of an aprotic organic solvent having a boiling point of at least 240 ° C., a viscosity of no greater than 15 cPs at the printing temperature and a surface tension of no greater than 55 dyne/cm at the printing temperature;
- and water;
- and
- allowing the volatile components of the ink composition to evaporate, whereby the hole injecting layer is formed.
3 more elements
Dependencies are inferred from the claim text.