Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting
Pyroelectric response of ferroelectric nanowires: Size effect and electric energy harvesting
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DOI：
10.1063/1.3474964
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发表时间：
2010-08-15
影响因子：
3.2
通讯作者：
Kalinin, S. V.
中科院分区：
文献类型：
--
作者：
Morozovska, A. N.;Eliseev, E. A.;Kalinin, S. V.
分析了铁电纳米线热释电响应的尺寸效应。热释电系数随丝半径的减小而增大，并在临界半径R处发散，对应于尺寸驱动的顺电相转变。热释电耦合的尺寸驱动增强导致了响应于温度波动的极化铁电纳米颗粒产生巨大的热释电电流和电压。的热释电能量收集和测辐射热检测的最大效率的推导，并示出接近卡诺极限的低温。(C)2010年美国物理学会。[doi：10.1063/1.3474964]
The size effect on pyroelectric response of ferroelectric nanowires is analyzed. The pyroelectric coefficient strongly increases with the wire radius decrease and diverges at critical radius R 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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3474964]