Enhanced energy density with a wide thermal stability in epitaxial Pb0.92La0.08Zr0.52Ti0.48O3 thin films
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Issue Date
2016-11-08Author
Hu, Guangliang
Ma, Chunrui
Wei, Wei
Sun, Zixiong
Lu, Lu
Mi, Shao-Bo
Liu, Ming
Ma, Beihai
Wu, Judy Z.
Jai, Chun-lin
Publisher
AIP Publishing
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
Copyright © 2016 Guangliang Hu et al.
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Show full item recordAbstract
High-quality epitaxial Pb0.92La0.08Zr0.52Ti0.48O3 (PLZT) films of thickness of 880 nm were fabricated using pulsed laser deposition on (001) Nb doped SrTiO3 (Nb:STO) substrates. Besides a confirmation of the epitaxial relationship [100]PLZT//[100]Nb:STO and (001)PLZT//(001)Nb:STO using X-ray diffraction, a transmission electron microscopy study has revealed a columnar structure across the film thickness. The recoverable energy density (Wrec) of the epitaxial PLZT thin film
capacitors increases linearly with the applied electric field and the best value of 31 J/cm3 observed at 2.27 MV/cm is considerably higher by 41% than that of the polycrystalline PLZT film of a comparable thickness. In addition to the high Wrec value, an excellent thermal stability as illustrated in a negligible temperature dependence of the Wrec in the temperature range from room temperature to 180 C is achieved. The enhanced Wrec and the thermal stability are attributed to the reduced defects and grain boundaries in epitaxial PLZT thin films, making them promising for energy storage applications that require both high energy density, power density, and wide operation temperatures.
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Citation
Hu, G., Ma, C., Wei, W., Sun, Z., Lu, L., Mi, S., . . . Jia, C. (2016). Enhanced energy density with a wide thermal stability in epitaxial Pb0.92La0.08Zr0.52Ti0.48O3 thin films. Applied Physics Letters, 109(19), 193904. doi:10.1063/1.4967223
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