An electrostatic nanogenerator based on ZnO/ZnS core/shell electrets with stabilized quasi-permanent charge

Chao Wang, Liang Cai, Yajuan Feng, Lin Chen, Wensheng Yan*, Qinghua Liu, Tao Yao, Fengchun Hu, Zhiyun Pan, Zhihu Sun, Shiqiang Wei

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

ZnO-based nanogenerators with excellent performance and convenient functionalization are particularly desirable for self-powered technology, which is however difficult to achieve simultaneously in traditional piezoelectric ZnO nanogenerators. Here, we report a design of electrostatic ZnO nanogenerator by virtue of a type-II ZnO/ZnS core/shell nanostructure electrets, which can turn acoustic waves into electric power with an energy conversion efficiency of 2.2%. The ZnO/ZnS core/shell electrets are charged by ultraviolet irradiation with a long-term stability of the electrostatic charges under ambient condition. The electronic and atomic structure evolution in the charged ZnO/ZnS core/shell electrets are also discussed by detailed experimental and theoretical investigations. This design opens up an alternative path for fabricating robust ZnO-based nanogenerator for future nanotechnology application.

Original languageEnglish (US)
Article number243112
JournalApplied Physics Letters
Volume104
Issue number24
DOIs
StatePublished - Jun 16 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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