Pyroelectric response of ferroelectric nanoparticles: size effect and electric energy harvesting

Details Pyroelectric response of ferroelectric nanoparticles: size effect and electric energy harvesting Pyroelectric response of ferroelectric nanoparticles: size effect and electric energy harvesting

2009-08-17

arxiv.org/abs/0908.2311v1

Physics

Condensed Matter

Materials Science

17 pages, 4 figures, 1 Appendix

Scientific paper

The size effect on pyroelectric response of ferroelectric nanowires and nanotubes is analyzed. The pyroelectric coefficient strongly increases with the wire radius decrease and diverges at critical radius Rcr corresponding to the size-driven transition into paraelectric phase. Size-driven enhancement of pyroelectric coupling leads to the giant pyroelectric current and voltage generation by the polarized ferroelectric nanoparticles in response to the temperature fluctuation. The maximum efficiency of the pyroelectric energy harvesting and bolometric detection is derived, and is shown to approach the Carnot limit for low temperatures.

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