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Related Experiment Video

Updated: May 20, 2025

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

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Enhanced Energy Storage Performance in Mn-Doped SrBi5Ti4FeO18 Thin Films via Defect Engineering.

Yifeng Xia1, Hua Hao2,3, Cheng Tao2

  • 1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China.

ACS Applied Materials & Interfaces
|March 24, 2025
PubMed
Summary

This study enhances dielectric capacitor performance using manganese doping in Aurivillius-phase ferroelectrics. The optimized thin film exhibits superior energy storage density and efficiency, crucial for advanced electronics.

Keywords:
Aurivillius-phase ferroelectricsbreakdown strengthdefect engineeringenergy storagethin film

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Ceramic Engineering

Background:

  • Dielectric capacitors are vital for electronics but limited by low energy storage density and efficiency.
  • Aurivillius-phase ferroelectrics offer potential but suffer from low polarization and high hysteresis.
  • Defect engineering is explored to overcome limitations in energy storage materials.

Purpose of the Study:

  • To enhance the energy storage performance of SrBi5Ti4FeO18 thin films.
  • To investigate the effects of manganese (Mn) doping on dielectric properties.
  • To develop a cost-effective defect-engineering strategy for advanced capacitors.

Main Methods:

  • Thin film fabrication of SrBi5Ti4FeO18 via a simple and cost-effective method.
  • Introduction of Mn dopants to engineer defects, specifically oxygen vacancies.
  • Characterization of structural, electrical, and energy storage properties of the doped films.

Main Results:

  • Mn doping suppressed oxygen vacancy formation and induced tensile chemical stress.
  • Optimized SrBi5Ti3.91Mn0.09FeO18 achieved 105 J/cm3 energy density and 70% efficiency at 3569 kV/cm.
  • Enhanced frequency, thermal stability, and fatigue endurance (>10^5 cycles) were observed.

Conclusions:

  • Defect engineering via Mn doping is a feasible strategy for high-performance dielectric capacitors.
  • The optimized material shows significant improvements in energy storage density and efficiency.
  • This approach offers a pathway for developing advanced energy storage solutions.