Stress induced enhanced polarization in multilayer BiFeO3/BaTiO3 structure with improved energy storage properties

Abstract

Present work reports the fabrication of a multilayer (5-layer) structure of BiFeO3(BFO)/BaTiO3(BTO) using spin-coating technique. The crystallographic structure, surface morphology and ferroelectric behavior of multilayer structure in metal-ferroelectric-metal capacitor have been studied. Le-Bail refinement of X-ray diffraction data revealed the formation of polycrystalline pure perovskite phase with induced stress. The values of remnant (Pr) and saturation polarization (Ps) for BFO/BTO multilayer structure are found to be 38.14 μC/cm2 and 71.54 μC/cm2 respectively, which are much higher than the corresponding values reported for bare BFO thin film. A large value of dielectric constant of 187 has been obtained for multilayer structure with a low leakage current density of 1.09 × 10−7 A/cm2 at applied bias of 10 V. The BFO/BTO multilayer structure favors the enhanced energy storage capacity as compared to bare BFO thin film with improved values of energy-density and charge-discharge efficiency as 121 mJ/cm3 and 59% respectively, suggesting futuristic energy storage applications.

Facial Synthesis and Photoreaction Mechanism of BiFeO3/Bi2Fe4O9 Heterojunction Nanofibers

“…In our work, we found that BiFeO 3 containing small amounts of Bi 2 Fe 4 O 9 shows a better photocatalytic activity and photoelectric performance than that of pure BiFeO 3 . However, although some researchers had reported the visible-light-driven photodegradation activities of BiFeO 3 /Bi 2 Fe 4 O 9 microspheres until now, − there has been little report on its photocatalytic hydrogen evolution from water, and the photoelectric performance and photoreactive mechanism of BiFeO 3 /Bi 2 Fe 4 O 9 heterojunctions still need further investigation.…”

Recent Advances in Multilayer‐Structure Dielectrics for Energy Storage Application

“…Ceramic capacitors have been used for energy storage purposes for more than 60 years, which has a vital role in the field of power electronics and pulsed power systems due to their small footprint, excellent temperature stability (up to 250 °C) and high ε r . [ 35 , 89 , 112 , 113 , 114 , 115 , 116 ] It is well known that the capacity of a capacitor is inversely proportional to the distance between the electrodes and directly proportional to the area of the electrodes. Therefore, those ceramic dielectrics that are made into a multilayer structure can obtain a larger capacitance capacity.…”

Designed Giant Room‐Temperature Electrocaloric Effects in Metal‐Free Organic Perovskite [MDABCO](NH4)I3 by Phase–Field Simulations

“…As an effective approach, stress/strain engineering has been generally employed to regulate the microstructures [27,28] and properties of ferroelectric materials, such as ferroelectricity, [29][30][31][32] piezoelectricity, [33][34][35][36] energy-storage performance, [37][38][39] and ECE. [16,[40][41][42][43][44] Considering the practical application, the cooling temperature range of the ECE is mainly expected to be around room temperature.…”