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n-ZnO/p-NiO Core/Shell-Structured Nanorods for Piezoelectric Nanogenerators

Title
n-ZnO/p-NiO Core/Shell-Structured Nanorods for Piezoelectric Nanogenerators
Authors
Han, Sang AHwang, Soo MinSeung, WanchulKim, Tae YunPark, Min-SikLee, Ju-HyuckKim, Sang-WooKim, Jung Ho
DGIST Authors
Lee, Ju-Hyuck
Issue Date
2020-10
Citation
Energy Technology, 8(10), 2000462
Type
Article
Article Type
Article
Author Keywords
core-shellsNiOpiezoelectric nanogeneratorsZnO
Keywords
OXYGEN-PLASMA TREATMENTTHIN-FILMSENSORPOWERSIZE
ISSN
2194-4288
Abstract
Energy-harvesting technologies, which can generate electrical energy from various energy sources, such as solar, thermal, and mechanical movement that are commonly found in the local environment, supply permanent and environmentally friendly energy. In addition, related research has been in the spotlight because it provides power by harvesting and converting a naturally occurring energy source without a charging process through external power. Piezoelectric nanogenerators (PENGs) based on piezoelectric materials have attracted much attention due to their high energy-conversion efficiency, capability for miniaturization, and light weight. Zinc oxide (ZnO), which has a wurtzite crystal structure, is a representative piezoelectric material. The defects that are inevitably present in ZnO nanorods (NRs), however, generate excessive free electrons, which reduce the piezoelectric potential and thus reduce the output characteristics. Herein, ZnO–NiO core–shell structure–based PENGs are designed to enhance their piezoelectric output performance by reducing excess electrons in the ZnO NRs using a p-type semiconducting NiO layer. The thickness and structure of the NiO coated on the ZnO NRs are observed and analyzed by adjusting the molar concentration of solution for the NiO layer coating, and the effects of these on the piezoelectric output are discussed. © 2020 Wiley-VCH GmbH
URI
http://hdl.handle.net/20.500.11750/12625
DOI
10.1002/ente.202000462
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Lee, Ju-Hyuck Energy Conversion Materials Engineering Laboratory
  • Research Interests Energy Harvesting; Synthesis of Various Nano/Microstructured Energy Materials; Piezoelectric Generator; Triboelectric Generator; Bio-Compatible Energy Materials and Generator; Biomimetic Biomolecule based Energy Materials and Devices
Files:
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Collection:
Department of Energy Science and EngineeringEnergy Conversion Materials Engineering Laboratory1. Journal Articles


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