Significant polarization variation near room temperature of Ba_0.65Sr_0.35TiO₃ thin films for pyroelectric energy harvesting

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• 作者：K. Huang^a ; ^b  ; [Author Vitae] ; J.B. Wang^a ; ^b ; ^{jbwang@xtu.edu.cn}  ; [Author Vitae] ; X.L. Zhong^a ; ^b ; ^{xlzhong@xtu.edu.cn}  ; [Author Vitae] ; B.L. Liu^a ; ^b  ; [Author Vitae] ; T. Chen^a ; ^b  ; [Author Vitae] ; Y.C. Zhou^a ; ^b  ; [Author Vitae]
• 关键词：Ferroelectric materials ; Pyroelectric films ; Pyroelectric effects ; Energy harvesting ; Polarization variation
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2012
• 期刊代码：161_09254005
• 类别：et
• 出版时间：5 July, 2012
• 卷：169
• 期：Complete
• 页码：208-212
• 文件大小：973 K

摘要

Ba_0.65Sr_0.35TiO₃ (BST) thin films with self-buffered layers were prepared on Pt(1 1 1)/Ti/SiO₂/Si substrates by chemical solution deposition. The effect of self-buffered layer on the crystal orientation of BST film was studied. Polarization variation with room temperature and harvested energy density of BST film were also investigated. It is found that the (1 0 0) of the BST film with self-buffer layer is more intense than those of the BST film without self-buffer layer. For the BST film with 550 掳C annealed self-buffer layer, the polarization variation reaches to 5.2 渭C/cm² from 77 to 2 掳C, and the harvested energy density is calculated to be 128 mJ/cm³ based on the polarization variation using the Ericsson cycles.