Degradation pattern of SnO2 nanowire field effect transistors

The degradation pattern of SnO2 nanowire field effect transistors (FETs) was investigated by using an individual SnO2 nanowire that was passivated in sections by either a PMMA (polymethylmethacrylate) or an Al2O3 layer. The PMMA passivated section showed the best mobility performance with a significant positive shift in the threshold voltage. The distinctive two-dimensional R-s-mu diagram based on a serial resistor connected FET model suggested that this would be a useful tool for evaluating the efficiency for post-treatments that would improve the device performance of a single nanowire transistor.