Figure 6From: Enhanced UV photosensitivity from rapid thermal annealed vertically aligned ZnO nanowires A schematic of photoresponse mechanism of ZnO NWs. (a) at dark condition and (b) during UV illumination. (c) Schematic energy band diagram of photoresponse process during UV illumination. The band bending is due to the formation of potential barrier in the NWs surface due to oxygen adsorption.Back to article page