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

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

来源：Applied Physics Letters, 2014, 104(24): 243112.

DOI：10.1063/1.4884366

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.

• 出版日期2014-6-16
• 单位中国科学技术大学