Mechanical layer compaction for dispersion processed nanoparticulate zinc oxide thin film transistors

Using rolling as a roll-to-roll compatible compaction process for solution processable electronics, we demonstrate improved layer morphology and field effect transistor performance of nanoparticulate zinc oxide (ZnO) thin films. Semiconducting ZnO layers have been processed from a polyvinylpyrrolidone (PVP) stabilized nanoparticulate dispersion at low temperatures. Maximum saturation mobilities of 7x10^-^3cm^2/Vs, improvements in mobility of more than one order of magnitude and a reduction in threshold voltage by more than 30% are shown.