Giant polarization ripple in transverse pyroelectricity
|Corresponding Author||He，Jiaqing; Ho，Ghim Wei|
Pyroelectricity originates from spontaneous polarization variation, promising in omnipresent non-static thermodynamic energy harvesting. Particularly, changing spontaneous polarization via out-of-plane uniform heat perturbations has been shown in solar pyroelectrics. However, these approaches present unequivocal inefficiency due to spatially coupled low temperature change and duration along the longitudinal direction. Here we demonstrate unconventional giant polarization ripples in transverse pyroelectrics, without increasing the total energy input, into electricity with an efficiency of 5-fold of conventional longitudinal counterparts. The non-uniform graded temperature variation arises from decoupled heat localization and propagation, leading to anomalous in-plane heat perturbation (29-fold) and enhanced thermal disequilibrium effects. This in turn triggers an augmented polarization ripple, fundamentally enabling unprecedented electricity generation performance. Notably, the device generates a power density of 38 mW m at 1 sun illumination, which is competitive with solar thermoelectrics and ferrophotovoltaics. Our findings provide a viable paradigm, not only for universal practical pyroelectric heat harvesting but for flexible manipulation of transverse heat transfer towards sustainable energy harvesting and management.
NI Journal Papers
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Physics|
1.Department of Electrical and Computer Engineering,National University of Singapore,Singapore,Singapore
2.Department of Physics,Southern University of Science and Technology,Shenzhen,China
3.School of Electronic Science and Engineering,State Key Laboratory of Electronic Thin Film and Integrated Devices,University of Electronic Science and Technology of China,Chengdu,China
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,China
5.Department of Materials Science and Engineering,National University of Singapore,Singapore,Singapore
6.Institute of Materials Research and Engineering,A*STAR (Agency for Science,Technology and Research),Singapore,Singapore
|First Author Affilication||Department of Physics|
|Corresponding Author Affilication||Department of Physics|
Zhou，Yi,Ding，Tianpeng,Guo，Jun,et al. Giant polarization ripple in transverse pyroelectricity[J]. Nature Communications,2023,14(1).
Zhou，Yi.,Ding，Tianpeng.,Guo，Jun.,Xu，Guoqiang.,Cheng，Mingqiang.,...&Ho，Ghim Wei.(2023).Giant polarization ripple in transverse pyroelectricity.Nature Communications,14(1).
Zhou，Yi,et al."Giant polarization ripple in transverse pyroelectricity".Nature Communications 14.1(2023).
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