A large area bimaterial sheet of piezoelectric nanogenerators for energy harvesting: Effect of RF sputtering on ZnO nanorod

Enhanced output voltage generation via ZnO nanowires (50 nm): Effect of diameter thinning on voltage enhancement

“…One schottky contact is essential for the piezoelectric potential; Au and Pt both have been used for the same purpose [20,29,30].Infirst stage, where 2.5 nm thick top layer is grown has given the evidence of schottky contact between nanowires and top electrode like mentioned in our earlier results [8]. Au sputtered electrode for schottky contact has been reported earlier [31] and ITO coated bottom electrode has also been used in the study which acted as bottom electrode however the previous study was focused on RF sputter coated seed layer and its effects on piezoelectric potential but top and bottom electrode structure was quite close the experimental approach that we have discussed in our results. The evidence of schottky contact has also been reported for AFM contact mode, where investigation of piezoelectric voltage has been carried out, AFM tip has produced minute external pressure in contact mode that we have produced by an external roller [32], as contact mode AFM has its own limitations and AFM tip has to be changed after every now and then that makes it more expensive and non viable approach.…”

Vertically aligned zinc oxide nanowires electrodeposited within porous polycarbonate templates for vibrational energy harvesting

“…Additionally, energy conversion efficiency and figures of merit, as defined in [22], were evaluated for the ZnO NWs grown by TAED (see supplementary data S4), and found to be comparable to previously reported values, while an overall device efficiency was also calculated as shown in supplementary data S5 and reported in table 1. The effect of crystallinity of the NWs on NG performance has previously been studied, and indicates that as the size of the crystallites within ZnO NWs [45] or nanotubes [6] increases, the voltage and current output increases. This is due to the decrease in the number of grain boundaries and defects for larger crystallites, which is seen in XRD patterns as the narrowing of the preferred orientation peak [6].…”

Rectenna materials improving low scale RF power harvesting for embedded miniature sensors

“…The system was fabricated with 0.6 _m-CMOS technology, and can supply well-regulated 4.0 V/1mA DC power to the load for 10 ms periodically. ZnO is also used to generated power as follows [11]. An optimal Radio Frequency (RF) sputtering process (sputtering power, sputtering time, and target type) to grow a ZnO seed layer on an Indium Tin Oxide (ITO) glass followed by the hydrothermal growth of a well-aligned perpendicular ZnO nanorod array for the fabrication of a piezoelectric nanogenerator Fig.…”