Journal
APPLIED SURFACE SCIENCE
Volume 322, Issue -, Pages 95-100Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.10.081
Keywords
Carbon-fiber/ZnO-ZnSe; Nanogenerator; Piezoelectric; High-output current
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Funding
- Natural Science Foundation of China [51172058]
- Key Project of the Science Technology
- Research Project of Education Bureau, Heilongjiang Province [12521z012]
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The pin-shaped ZnO-ZnSe nanowire arrays on the surface of a carbon fiber (CF/ZnO-ZnSe) were synthesized via two-step hydrothermal method. Based on a single CF/ZnO-ZnSe on a polymer substrate, a flexible nanogenerator device was fabricated which produced high-output current about 333 mu A when the device was subjected to a -0.55% tensile strain and the current was enhanced by as much as 66%. The superior piezoelectric performance is derived from the piezopotential in ZnO nanowire arrays induced by the compressive strain or tensile strain, which lowers or raises the barrier height and increases or decreases the current density at the ZnO-ZnSe heterojunction interface. This kind of CF/ZnO-ZnSe bilayer structure has a great potential for nanogenerator device and this result opens up the path for practical applications of piezoelectric nanogenerator. (C) 2014 Elsevier B.V. All rights reserved.
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