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

被引：66

作者：

Lu, Shengnan ^{[1
]}

Liao, Qingliang ^{[1
]}

Qi, Junjie ^{[1
]}

Liu, Shuo ^{[1
]}

Liu, Yichong ^{[1
]}

Liang, Qijie ^{[1
]}

Zhang, Guangjie ^{[1
]}

Zhang, Yue ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Key Lab New Energy Mat & Technol, Beijing 100083, Peoples R China

来源：

NANO RESEARCH | 2016年 / 9卷 / 02期

基金：

中国国家自然科学基金;

关键词：

screening effect; piezopotential; Schottky junction; Au@ZnO nanoarrays; piezoelectric nanogenerator; ZNO NANORODS; V OUTPUT; NANOWIRES; SURFACE; OXIDE; PHOTORESPONSE; GENERATION; CARRIERS; BARRIER; SENSORS;

D O I：

10.1007/s12274-015-0916-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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-energy-conversion performance was greatly enhanced. The output voltage and current density of the Au@ZnO nanoarray-based piezoelectric nanogenerator reached 2 V and 1 mu A/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 nanoarray-based 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.

引用

页码：372 / 379

页数：8

共 33 条

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