HIGH TEMPERATURE CURABLE AND NANOPOROUS SUBSTRATE FOR PRINTED ELECTRONICS

Abstract

Printing of nanomaterial inks for printed electronics requires a printing substrate that has glossy surface, absorbing layer, and high temperature curable. Polyether sulfone (PES) thin film, a high-performance substrate for printing nanomaterial inks, was prepared as a free standing thin film. And it was used to coat on rough surface substrates such as paper and fabric, and unabsorbed layer substrate such as plastic substrate and glass wafer to turn those surfaces have glossy surface and absorbed layer, respectively. The PES film was found to have nanoporous surface and microporous structure in its matrix. They function as a nanomaterial ink-receiving layer and a solvent absorbed layer, respectively. Conductive inks, silver nanoparticle (AgNP), carbon nanotube (CNT), and poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) ink were printed on the prepared PES-based substrates using noncontact and contact printing methods. The conductive printed patterns on PES based substrates showed highly electrically conductive after annealing at high temperature up to 200 ^oC, high resolution, and durable. The PES-based substrates show excellent characteristics that are suitable for printed electronic applications.