Low hysteresis and enhanced figure-of-merit of pyroelectric energy conversion at compatible phase transformation

The pyroelectricity of polar materials provides great potential for electricity generation from waste heat. The pyroelectric effect of the material can be magnificently enhanced at a first-order phase transformation due to the abrupt jump in spontaneous polarization within a narrow temperature range...

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Veröffentlicht in:	Applied physics letters 2021-08, Vol.119 (8)
Hauptverfasser:	Zhang, Chenbo, Zhu, Zeyuan, Choi, Jong Yun, Kim, Jung Yun, Chen, Xian
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied physics Composition Crystallography Energy conversion Hysteresis Phase transitions Photovoltaic cells Pyroelectricity
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container_title	Applied physics letters
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creator	Zhang, Chenbo Zhu, Zeyuan Choi, Jong Yun Kim, Jung Yun Chen, Xian
description	The pyroelectricity of polar materials provides great potential for electricity generation from waste heat. The pyroelectric effect of the material can be magnificently enhanced at a first-order phase transformation due to the abrupt jump in spontaneous polarization within a narrow temperature range. Here, we show that the performance of energy conversion by phase transformation is inversely resonant with the hysteresis of thermally driven structural transformations in a (Ba1−xSrx) (Hf0.02Ce0.005Ti0.975)O3 system, corresponding to a singular lattice distortion mode satisfying the crystallographic compatibility condition. Among the finely tuned Sr compositions from 0.04 to 0.10, we discovered that Sr0.07 composition is a promising material candidate in this material system for pyroelectric energy conversion. Our work suggests a rational strategy of material development for pyroelectric energy conversion applications.
doi_str_mv	10.1063/5.0056204
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subjects	Applied physics Composition Crystallography Energy conversion Hysteresis Phase transitions Photovoltaic cells Pyroelectricity
title	Low hysteresis and enhanced figure-of-merit of pyroelectric energy conversion at compatible phase transformation
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