The enhanced performance of piezoelectric nanogenerator via suppressing screening effect with Au particles/ZnO nanoarrays Schottky junction

This paper describes a novel strategy to weaken the piezopotential screening effect by forming Schottky junctions on the ZnO surface through the introduction of Au particles onto the surface. With this approach, the piezoelectric-energyconversion performance was greatly enhanced. The output voltage...

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Bibliographic Details
Published inNano research Vol. 9; no. 2; pp. 372 - 379
Main Authors Lu, Shengnan, Liao, Qingliang, Qi, Junjie, Liu, Shuo, Liu, Yichong, Liang, Qijie, Zhang, Guangjie, Zhang, Yue
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 01.02.2016
Subjects
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Capacitance
Carrier density
Chemistry and Materials Science
Condensed Matter Physics
Electric power generation
Laboratories
Materials Science
Microscopy
Morphology
Nanogenerators
Nanoparticles
Nanostructure
Nanotechnology
Nanowires
Performance enhancement
Piezoelectricity
Polyvinyl alcohol
Research Article
Retarding
Screening
Seeds
Spectrum analysis
Strategy
Voltage
Zinc oxide
发电机
增强性能
屏蔽效应
氧化锌
纳米阵列
肖特基结
颗粒表面
高压电
piezopotential
Au@ZnO nanoarrays
Schottky junction
screening effect
piezoelectric nanogenerator
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Summary:This paper describes a novel strategy to weaken the piezopotential screening effect by forming Schottky junctions on the ZnO surface through the introduction of Au particles onto the surface. With this approach, the piezoelectric-energyconversion performance was greatly enhanced. The output voltage and current density of the Au@ZnO nanoarray-based piezoelectric nanogenerator reached 2 V and 1 μA/cm^2, respectively, 10 times higher than the output of pristine ZnO nanoarray-based piezoelectric nanogenerators. We attribute this enhancement to dramatic suppression of the screening effect due to the decreased carrier concentration, as determined by scanning Kelvin probe microscope measurements and impedance analysis. The lowered capacitance of the Au@ZnO nanoarraybased piezoelectric nanogenerator also contributes to the improved output. This work provides a novel method to enhance the performance of piezoelectric nanogenerators and possibly extends to piezotronics and piezophototronics.
Bibliography:screening effect,piezopotential,Schottky junction,Au@ZnO nanoarrays,piezoelectric nanogenerator
11-5974/O4
This paper describes a novel strategy to weaken the piezopotential screening effect by forming Schottky junctions on the ZnO surface through the introduction of Au particles onto the surface. With this approach, the piezoelectric-energyconversion performance was greatly enhanced. The output voltage and current density of the Au@ZnO nanoarray-based piezoelectric nanogenerator reached 2 V and 1 μA/cm^2, respectively, 10 times higher than the output of pristine ZnO nanoarray-based piezoelectric nanogenerators. We attribute this enhancement to dramatic suppression of the screening effect due to the decreased carrier concentration, as determined by scanning Kelvin probe microscope measurements and impedance analysis. The lowered capacitance of the Au@ZnO nanoarraybased piezoelectric nanogenerator also contributes to the improved output. This work provides a novel method to enhance the performance of piezoelectric nanogenerators and possibly extends to piezotronics and piezophototronics.
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SourceType-Scholarly Journals-1
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ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-015-0916-6