p-Channel and n-Channel Thin-Film-Transistor Operation on Sprayed ZnO Nanoparticle Layers

Figure 4

(a) I-V characteristic of the pn-junction diode studied in this paper. The cross-sectional illustration is in the inset. Ohmic tests for the contact electrodes on (b) n-type and (c) p-type ZnO-NP layers, respectively.