Coexistence of piezoelectricity and electric conduction in oxygen-deficient NaNbO3-delta sub-micron cubes
- 주제(키워드) NaNbO3 sub-micron cube , Oxygen vacancy , Piezoelectricity , Electric conduction
- 등재 SCIE, SCOPUS
- 발행기관 ELSEVIER SCIENCE BV
- 발행년도 2014
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000091223
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.mseb.2013.12.002
초록/요약
We have investigated the effect of oxygen vacancy on the structural and electrical properties of NaNbO3 sub-micron cubes. Through the Rietveld analysis and Raman scattering, we have confirmed that both NaNbO3 and oxygen deficient NaNbO3-delta have Pmc2(1) symmetry, which has no space-inversion. The oxygen vacancy seems to induce the change from the ferroelectricity of NaNbO3 to the piezoelectricity of NaNbO3-delta and the increase of electric conduction. This work may provide the plausible way to realize sub-micron-size lead-free piezoelectric semiconductors with perovskite structure, which should be quite useful for piezoelectric energy harvesting, switchable diode, and photovoltaic applications. (C) 2013 Elsevier B.V. All rights reserved.
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