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Enhancements of dielectric and energy storage performances in lead‐free films with sandwich architecture
Author(s) -
Pan Hao,
Zhang Qinghua,
Wang Meng,
Lan Shun,
Meng Fanqi,
Ma Jing,
Gu Lin,
Shen Yang,
Yu Pu,
Lin YuanHua,
Nan CeWen
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16145
Subject(s) - dielectric , materials science , energy storage , leakage (economics) , optoelectronics , permittivity , capacitive sensing , composite material , engineering physics , electronic engineering , electrical engineering , engineering , power (physics) , physics , quantum mechanics , economics , macroeconomics
High‐performance film dielectrics are crucial for capacitive energy storage applications and electronic industries. In this work, improvements of dielectric and energy performance in BiFeO 3 ‐based films are realized by constructing sandwich architectures, which integrates complementary features of spatially organized dielectric layers in a synergistic manner to realize concurrently high permittivity/polarization and low loss/leakage. Moreover, by rationally modifying the sandwich configuration, ie, with insulating layers on the outside, the interfacial Schottky emission is suppressed, leading to further reductions of leakage and conduction loss. Large energy density of ~44 J cm −3 (superior to that of either single layer) along with high efficiency of ~76% is thus achieved in the sandwich film. This work proves the feasibility and effectiveness of sandwich architecture in improving dielectric, leakage, and energy storage performances, providing a new paradigm for the development of high‐energy‐density dielectrics.