Optimization of energy storage performance in (La, Mn) co-doped SrTiO3 thin film through grain engineering

Lead-free dielectric capacitors have become a topic of great interest in response to the ever-increasing demand for high-performance and environmentally friend energy devices. As SrTiO3 (STO) is paraelectrics, the extremely low spontaneous polarization limits the development of its energy storage ap...

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Bibliographic Details
Published in:Ceramics international 2024-11, Vol.50 (21), p.43738-43744
Main Authors: He, Fang, Fu, Dashuang, Wu, Yunkai, Wang, Xu
Format: Article
Language:English
Subjects:
Co-doped
Dielectric properties
Energy storage
SrTiO3 thin film
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Summary:Lead-free dielectric capacitors have become a topic of great interest in response to the ever-increasing demand for high-performance and environmentally friend energy devices. As SrTiO3 (STO) is paraelectrics, the extremely low spontaneous polarization limits the development of its energy storage applications. In this paper, the microstructure and ferroelectric properties of STO are adjusted by grain engineering to expand its application in energy storage. STO, SrTi1-xMnxO3 (STMx, x = 0.01 and 0.04) and Sr1-yLayTiMn0.01O3(SLyTM0.01, y = 0.01, 0.02, 0.03 and 0.04) thin films are synthesized by the sol-gel method and thoroughly investigated on the effects of A-site (La) and B-site (Mn) co-doping effects on the crystalline phase, morphology, dielectric, ferroelectric and energy storage characteristics of STO thin film. The results indicate that the SL0.01TM0.01 thin film exhibits a breakdown electric field of 3666.2 kV/cm. The SL0.02M0.01 thin film exhibits excellent frequency stability and low dielectric loss (
ISSN:0272-8842
DOI:10.1016/j.ceramint.2024.08.225