Ultrahigh energy storage in lead-free BiFeO3/Bi3.25La0.75Ti3O12 thin film capacitors by solution processing.

Authors :: Yang, B. B.
Guo, M. Y.
Jin, L. H.
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; 1/20/2018, Vol. 112 Issue 3, p033904-1-N.PAG, 5p, 5 Graphs
Publication Year :: 2018
Abstract: Thin film ferroelectric capacitors (TFFCs) with excellent energy storage have attracted increasing attention due to the electronic devices toward miniaturization and integration. BiFeO<subscript>3</subscript> (BF)/ Bi<subscript>3.25</subscript>La<subscript>0.75</subscript>Ti<subscript>3</subscript>O<subscript>12</subscript> (BL) based thin films are prepared by chemical solution deposition for energy storage. Ultrahigh energy storage with a recoverable energy density U<subscript>re</subscript> of 54.9 J/cm<superscript>3</superscript> and an efficiency g of 74.4% is observed in the bilayered BF/BL thin films. Further improvement of energy storage is realized in trilayered BL/BF/BL thin films with a U<subscript>re</subscript> of 65.5 J/cm<superscript>3</superscript> and an efficiency g of 74.2% at an electric field of 2753 kV/cm as well as excellent fatigue endurance up to 10<superscript>9</superscript> cycles. The results suggest that BF/BL based thin films can be used as lead-free TFFCs in energy storage applications. [ABSTRACT FROM AUTHOR]

Subjects :: CAPACITORS
CAPACITOR testing
CAPACITOR design & construction
FERROELECTRICITY
FERROELECTRIC thin films

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