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Energy storage properties in BaTiO3-Bi3.25La0.75Ti3O12 thin films.

Authors :: Yang, B. B.
Guo, M. Y.
Song, D. P.
Tang, X. W.
Wei, R. H.
Hu, L.
Yang, J.
Song, W. H.
Dai, J. M.
Lou, X. J.
Zhu, X. B.
Sun, Y. P.
Source :: Applied Physics Letters; 10/29/2018, Vol. 113 Issue 18, pN.PAG-N.PAG, 5p, 1 Color Photograph, 4 Graphs
Publication Year :: 2018
Abstract: Developing lead-free film dielectric capacitors with high-performance of energy storage density, efficiency, fatigue endurance, and thermal stabilities is desirable. Here, we report energy storage properties in (1-x)BaTiO<subscript>3</subscript>-xBi<subscript>3.25</subscript>La<subscript>0.75</subscript>Ti<subscript>3</subscript>O<subscript>12</subscript> thin films. It is revealed that a 0.6BaTiO<subscript>3</subscript>-0.4Bi<subscript>3.25</subscript>La<subscript>0.75</subscript>Ti<subscript>3</subscript>O<subscript>12</subscript> thin film with a thickness of 280 nm and a crystallization temperature of 650 °C shows a breakdown strength of 3.23 MV/cm with a large polarization value and dielectric constant. An ultrahigh energy storage density of 61.1 J/cm<superscript>3</superscript> and an efficiency of 84.2% are simultaneously achieved at room temperature. Additionally, excellent fatigue endurance after 6 × 10<superscript>9</superscript> cycles and good thermal stability up to 150 °C are observed, implying excellent energy storage performance in 0.6BaTiO<subscript>3</subscript>-0.4Bi<subscript>3.25</subscript>La<subscript>0.75</subscript>Ti<subscript>3</subscript>O<subscript>12</subscript> thin films. [ABSTRACT FROM AUTHOR]