Enhanced figure of merit in Pb(Zr,Ti)O3 nanorods for piezoelectric energy harvesting
Enhanced figure of merit in Pb(Zr,Ti)O3 nanorods for piezoelectric energy harvesting
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DOI：
10.1063/5.0023937
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发表时间：
2020-10
期刊：
影响因子：
1.6
通讯作者：
Jundong Song;Tomoaki Yamada;K. Okamoto;M. Yoshino;T. Nagasaki
中科院分区：
文献类型：
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作者：
Jundong Song;Tomoaki Yamada;K. Okamoto;M. Yoshino;T. Nagasaki
基于纳米棒阵列的压电能量收集技术因其结构简单且具有产生大输出功率的潜力而备受关注。与典型的压电薄膜相比，纳米棒阵列的密度降低，应该获得更大的优点系数（FOM）。然而，纳米棒阵列密度的影响很少得到直接实验的验证。在本研究中，我们采用脉冲激光沉积的方法制备了Pb(Zr,Ti)O3纳米棒，并将其与薄膜进行了比较。纳米棒具有a/c畴结构，这与参考膜一致，导致类似的压电响应。纳米棒密度的降低导致有效介电常数的明显降低，从而显著增加了有效FOM。结果表明，与薄膜相比，纳米棒的FOM和可用能量提高了61%。纳米棒的FOM增强表明了压电能量收集在非谐振振动环境中的应用前景。
Piezoelectric energy harvesting based on nanorod arrays has attracted attention owing to the simple structure that has the potential to generate large output power. The decreased density of the nanorod array, compared to that of typical piezoelectric films, should achieve a larger figure of merit (FOM). However, the effect of the density of the nanorod array has been scarcely validated by direct experiments. In this study, we fabricated Pb(Zr,Ti)O3 nanorods by using an elevated growth rate during pulsed laser deposition and compared them with the film. The nanorods have the a/c-domain structure, which is consistent with the reference film, leading to a similar piezoelectric response. The lowered density of the nanorods caused an appreciable reduction in the effective dielectric constant, which significantly increased the effective FOM. As a result, FOM and available energy of the nanorods were 61% improved, compared to those of the film. The enhanced FOM of the nanorod indicates the prospective application of piezoelectric energy harvesting in off-resonant vibration environments.