Performance of ZnO based piezo-generators under controlled compression. (11th May 2017)

• Record Type: Journal Article
• Authors: Tao, Ran; Parmar, Mitesh; Ardila, Gustavo; Oliveira, Paulo; Marques, Daniel; Montès, Laurent; Mouis, Mireille
• Is Part Of: Semiconductor science and technology. Volume 32:Number 6(2017:Jun.)
• Publication Date: 2017-05-11
• Subjects: zinc oxide (ZnO) nanowires (NWs) -- piezo-generators -- morphology control -- compression -- characterization set-up; Semiconductors -- Periodicals; 621.38152
• DOI: 10.1088/1361-6641/aa691f
• Languages: English
• ISSNs: 0268-1242

Abstract

Abstract: This paper reports on the fabrication and characterization of ZnO based vertically integrated nanogenerator (VING) devices under controlled compression. The basic NG structure is a composite material integrating hydrothermally grown vertical piezoelectric zinc oxide (ZnO) nanowires (NWs) into a dielectric matrix (PMMA). A specific characterization set-up has been developed to control the applied compression and the perpendicularity of the applied force on the devices. The role of different fabrication parameters has been evaluated experimentally and compared with previously reported theoretical models, including the thickness of the top PMMA layer and the density of the NWs array in the matrix. Finally, the performance of the VING structure has been evaluated experimentally for different resistive loads obtaining a power density of 85 μ W cm −3 considering only the active layer of the device. This has been compared to the performance of a commercial bulk layer of PZT (25 μ W cm −3 ) under the same applied force of 5 N.