Title: Thin Film Piezoelectric Energy Harvesting Nanostructured Materials: The Tailoring of Size, Porosity and Morphology of Zinc Stannate Perovskite Oxides (ABX3)

Authors: Christopher Munoz, Alyssah Fuentes, Tarik Dickens, Mohammed Jasim Uddin

DOI: 10.33599/nasampe/c.24.0348

Abstract: Perovskite (ABX3) research for energy harvesting applications has drawn much interest for many years but has been experiencing a bottleneck in innovative techniques to control the size and morphologies of these particles. This work seeks to leverage advantages of hydrothermal, molten salt, and solvothermal synthesis methods to facilitate several chemical and surface engineering techniques in producing smaller particles with more surface area for improved electrical response than by particles produced solely through hydrothermal treatment. Three dimensional (3D) piezoelectric zinc stannate (ZnSnO3) nanoweb arrays are synthesized using a combination of these treatment methods and deposited in polydimethylsiloxane (PDMS) thin films for analysis of its piezoelectric response. The combination of these treatments reduce the size of zinc stannate particles to approximately ~40nm-80nm of weblike networks, much smaller than previously reported ZnSnO3 sub-microcubes(500nm-800nm). Scanning electron microscopy (SEM) and X-Ray Diffraction (XRD) analysis was done after each procedural step to understand the effect of each treatment on our material. These tests reveal a mesoporous protonated tristannate oxide (H2Sn3O7) nanoweb template with connecting wirelike strands having diameters ranging from 12-27nm across and pores up to 50nm in diameter, in situ. The final solvothermal step produces a perovskite nanoweb in a mixed solvent solution of optimal dielectric conditions found to be 80% ethanol and 20% water for maximum Zn2+ integration. ZnSnO3 nanowebs were then deposited into PDMS thin films and used as a piezoelectric nanogenerator (PENG) to characterize its electrochemical properties. Comparative voltage analysis of PDMS films made with weight percentages of 0%, 1%, 5%, 10%, 15% and 20% zinc stannate sub-microcubes and nanowebs morphologies were done with varied testing forces using an oscilloscope. These tests reveal an increased voltage output for the zinc stannate nanoweb morphology with the 10% ZnSnO3-PDMS having the best performance in all variations of testing and a maximum voltage of 6.2 volts. The combination of these synthesis methods forming 3D zinc stannate nanoweb arrays of increased electrical response could have far-reaching implications in producing other metal oxides when approaching the design of perovskite nanomaterials and self-powered nanodevices in the coming decade.

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Conference: CAMX 2024 | San Diego CA

Publication Date: 2024/9/9

SKU: TP24-0000000348

Pages: 14

Price: $28.00