Organic Thin-Film Transistor Using High-Resolution Screen-Printed Electrodes

Organic thin-film transistors and inverters were fabricated with screen-printed electrodes. The screen printing ink was formulated with silver nanoparticles for high conductivity and carbon black for a high work function. Under optimum fabrication conditions, a pattern as small as 30 µm could be fabricated. The field effect mobility µ was calculated to be 7 ×10 -2 cm 2 V -1 s -1 from the organic thin-film transistor. For this transistor, the ratio of silver nanoparticles to carbon black for screen-printed electrodes was 30 to 70 wt %.