Piezoelectric Nanowires in Energy Harvesting Applications

Figure 2

The band diagram for understanding the charge output and flow processes in a nanogenerator with lateral bending model. (a) Before bending; (b) nanowire bent by the tip with the tip point at the stretched surface; (c) tip scans across the nanowire and reaching the middle point; (d) tip reaching the compressed surface of the nanowire; (e) energy-band diagram for the nanogenerator, presenting the output voltage and the role played by the piezoelectric potential. (Reproduced from [20] with the permission from WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)