Abstract
The manner in which ultrathin films of alumina, deposited at the dielectric-electrode interface, affect the recoverable energy density associated with (BiFeO3)0.6–(SrTiO3)0.4 (BFST) thin film capacitors has been characterised. Approximately 6 nm of alumina on 400 nm of BFST increases the maximum recoverable energy of the system by around 30% from ∼13 Jcc−1 to ∼17 Jcc−1. Essentially, the alumina acts in the same way as a naturally present parasitic “dead-layer,” distorting the polarisation-field response such that the ultimate polarisation associated with the BFST is pushed to higher values of electric field. The work acts as a proof-of-principle to illustrate how the design of artificial interfacial dielectric “dead-layers” can increase energy densities in simple dielectric capacitors, allowing them to compete more generally with other energy storage technologies.
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Dates
Type | When |
---|---|
Created | 12 years, 8 months ago (Dec. 12, 2012, 6:16 p.m.) |
Deposited | 2 years, 2 months ago (June 24, 2023, 10:39 p.m.) |
Indexed | 1 month ago (July 30, 2025, 7 a.m.) |
Issued | 12 years, 8 months ago (Dec. 10, 2012) |
Published | 12 years, 8 months ago (Dec. 10, 2012) |
Published Online | 12 years, 8 months ago (Dec. 12, 2012) |
Published Print | 12 years, 8 months ago (Dec. 10, 2012) |
@article{McMillen_2012, title={Increasing recoverable energy storage in electroceramic capacitors using “dead-layer” engineering}, volume={101}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4772016}, DOI={10.1063/1.4772016}, number={24}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={McMillen, M. and Douglas, A. M. and Correia, T. M. and Weaver, P. M. and Cain, M. G. and Gregg, J. M.}, year={2012}, month=dec }