Drying of Colloid Suspension

The next generation emissive displays including quantum dot LED(QLED) and organic LED(OLED) could be efficiently manufactured by inkjet printing, where nano-scale droplets are injected in banked substrate and after evaporation they leave layers of thin film that forms pixels of a display. This novel manufacturing method would greatly reduce cost and improve reliability. However, it is observed in practice that the deposit becomes much thicker near the bank edge and emission is faint there. This motivated the project and in this talk, we will mathematically model the phenomeno, understand its origin and investigate ways of making more uniform deposit by means of simulation.