Abstract
Flexible piezoelectric nanogenerators (PENGs) are very attractive for mechanical energy harvesting due to their high potential for realizing self-powered sensors and low-power electronics. In this paper, a PENG that is based on zinc oxide (ZnO) nanowires (NWs) is fabricated on flexible and transparent Polydimethylsiloxane (PDMS) substrate. The ZnO NWs were deposited on two different seed layer structures, i.e., gold (Au)/ZnO and tin-doped indium-oxide (ITO)/ZnO, using hydrothermal synthesis. Along with the structural and morphological analyses of ZnO NWs, the electrical characterization was also investigated for ZnO NWs-based flexible PENGs. In order to evaluate the suitability of the PENG device structure, the electrical output performance was studied. By applying a periodic mechanical force of 3 N, the ZnO NWs-based flexible PENG generated a maximum root mean square (RMS) voltage and average power of 2.7 V and 64 nW, respectively. Moreover, the comparison between the fabricated device performances shows that a higher electrical output can be obtained when ITO/ZnO seed layer structure is adopted. The proposed ZnO NWs-based PENG structure can provide a flexible and cost-effective device for supplying portable electronics.
Highlights
There has been a significant recent emphasis on mechanical energy harvesting for scavenging wasted or freely available ambient energy to generate electricity
Performances; this this could could lead lead to to aa decrease decrease in in this paper, we present a new process for in this paper, we present a new process for PDMS substrate fabrication that that helps to keep the integrity before electrical measurements
zinc oxide (ZnO) NWs grown by hydrothermal technique led to a pure-phase material
Summary
There has been a significant recent emphasis on mechanical energy harvesting for scavenging wasted or freely available ambient energy to generate electricity In this context, piezoelectric nanogenerators (PENGs) are required to play a noteworthy role for long lifetime and reliable power supply [1,2]. Many reports have been already published on the physical properties of ZnO including nanorods (NRs) and Nanomaterials 2021, 11, 1433. Many reports have2been already published on the physical properties of ZnO including nanorods (NRs) and nanowires (NWs) [9,10,11,12,13,14]. We focus on the fabrication widespread use in the development of PENGs. and characterization of ZnO NWs-based flexible.
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