Structure and electric properties of sandwich-structured SrTiO3/BiFeO3 thin films for energy storage applications

Diao, Chunli; Liu, Hanxing; Lou, Gengjian; Zheng, He‐Gen; Yao, Zhonghua; Hao, Hua; Cao, Minghe

doi:10.1016/j.jallcom.2018.11.391

Cited by 36 publications

(8 citation statements)

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“…Moreover, as clearly shown in Figure 4a, only Sr, Pt, Si, Ti and O elements were detected from the STO/Pt/Ti/SiO 2 /Si thin film heterostructure, and a 1:0.8 chemical stoichiometric ratio of Sr/Ti was revealed. This small deviation from the chemical stoichiometry can be attributed to the semiquantitative nature of the EDS analysis, as well as some diffusion/evaporation losses of impurity species containing Ti [7,19,22,25]. It should be noted that the other two STO films have shown similar surface morphologies and chemical composition.…”

Section: Resultsmentioning

confidence: 95%

“…Effects of annealing temperature in a postgrowth RTA process on the microstructures and energy storage characteristics of the STO films were discussed. By adjusting the annealing temperature to 650 °C, a pseudolinear P-E loop with a high energy storage per- [7,16,17,20,22,26,[38][39][40].…”

Section: Discussionmentioning

confidence: 99%

“…Figure 7. Comparison of energy storage performances between the STO film annealed at 650 • C in this work and some previously reported STO-based films deposited on Si substrates[7,16,17,20,22,26,[38][39][40].…”

mentioning

confidence: 87%

“…Compared with conventional ceramic capacitors, thin film ferroelectric capacitors exhibit a higher energy storage density and a larger breakdown electric field. The energy storage density and efficiency (η) for a ferroelectric capacitor can be calculated from its polarization-electric field (P-E) loop using the following equations [3,[6][7][8]:…”

Section: Introductionmentioning

confidence: 99%

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Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

et al. 2022

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Dielectric films with a high energy storage density and a large breakdown strength are promising material candidates for pulsed power electrical and electronic applications. Perovskite-type dielectric SrTiO3 (STO) has demonstrated interesting properties desirable for capacitive energy storage, including a high dielectric constant, a wide bandgap and a size-induced paraelectric-to-ferroelectric transition. To pave a way toward large-scale production, STO film capacitors were deposited on Pt(111)/Ti/SiO2/Si(100) substrates by the sol–gel method in this paper, and their electrical properties including the energy storage performance were studied as a function of the annealing temperature in the postgrowth rapid thermal annealing (RTA) process. The appearance of a ferroelectric phase at a high annealing temperature of 750 °C was revealed by X-ray diffraction and electrical characterizations (ferroelectric P-E loop). However, this high dielectric constant phase came at the cost of a low breakdown strength and a large hysteresis loss, which are not desirable for the energy storage application. On the other hand, when the RTA process was performed at a low temperature of 550 °C, a poorly crystallized perovskite phase together with a substantial amount of impurity phases appeared, resulting in a low breakdown strength as well as a very low dielectric constant. It is revealed that the best energy storage performance, which corresponds to a large breakdown strength and a medium dielectric constant, is achieved in STO films annealed at 650 °C, which showed a large energy density of 55 J/cm3 and an outstanding energy efficiency of 94.7% (@ 6.5 MV/cm). These findings lay out the foundation for processing high-quality STO film capacitors via the manufacturing-friendly sol–gel method.

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Section: Resultsmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

et al. 2022

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“…Sandwich-structured SrTiO 3 /BiFeO 3 /SrTiO 3 thin films show improved crystallization quality and excellent temperature stability of the dielectric constant. Their enhanced energy storage density results from the increased number of interfaces and makes the heterostructure a cost-effective and efficient option for electrostatic energy storage applications [300]. Sun et al, prepared (Ba 0.7 Ca 0.3 TiO 3 /BaZr 0.2 Ti 0.8 O 3 ) N multilayer structures with n = 2, 4, 8 by magnetron sputtering.…”

Section: Multilayersmentioning

confidence: 99%

Oxidic 2D Materials

Dubnack

Müller

2021

Materials

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The possibility of producing stable thin films, only a few atomic layers thick, from a variety of materials beyond graphene has led to two-dimensional (2D) materials being studied intensively in recent years. By reducing the layer thickness and approaching the crystallographic monolayer limit, a variety of unexpected and technologically relevant property phenomena were observed, which also depend on the subsequent arrangement and possible combination of individual layers to form heterostructures. These properties can be specifically used for the development of multifunctional devices, meeting the requirements of the advancing miniaturization of modern manufacturing technologies and the associated need to stabilize physical states even below critical layer thicknesses of conventional materials in the fields of electronics, magnetism and energy conversion. Differences in the structure of potential two-dimensional materials result in decisive influences on possible growth methods and possibilities for subsequent transfer of the thin films. In this review, we focus on recent advances in the rapidly growing field of two-dimensional materials, highlighting those with oxidic crystal structure like perovskites, garnets and spinels. In addition to a selection of well-established growth techniques and approaches for thin film transfer, we evaluate in detail their application potential as free-standing monolayers, bilayers and multilayers in a wide range of advanced technological applications. Finally, we provide suggestions for future developments of this promising research field in consideration of current challenges regarding scalability and structural stability of ultra-thin films.

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A review of synthesis and morphology of SrTiO ₃ for energy and other applications

et al. 2019

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Summary With the increasing demand and depleting trend of commercial energies, it has forced the researchers all over the world to accelerate research and development in the area of renewable energy. Currently, unique and interesting features of binary compounds have gained more attention by researchers, and it became a favourite research topic among various groups of researchers around this world. It was noticed that strontium titanate (SrTiO3) consists of several extraordinary properties that can apply for miscellaneous applications especially for energy storage, fuel cells, as well as to generate hydrogen fuel via photocatalysis process. Besides that, it was noticed that SrTiO3 can be synthesised in different pathways. The method of preparation and amount of precursors can affect the surface properties of SrTiO3. Thus, this article presents a critical review on how SrTiO3 synthesis methods affect its surface morphology and the applications of SrTiO3 in various fields.

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Structure and electric properties of sandwich-structured SrTiO3/BiFeO3 thin films for energy storage applications

Cited by 36 publications

References 36 publications

Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

Oxidic 2D Materials

A review of synthesis and morphology of SrTiO ₃ for energy and other applications

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Structure and electric properties of sandwich-structured SrTiO3/BiFeO3 thin films for energy storage applications

Cited by 36 publications

References 36 publications

Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

Energy Storage Properties of Sol–Gel-Processed SrTiO3 Films

Oxidic 2D Materials

A review of synthesis and morphology of SrTiO 3 for energy and other applications

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A review of synthesis and morphology of SrTiO ₃ for energy and other applications