Transition-metal oxides exhibiting a bistable resistance state are attractive for non-volatile memory applications. The relevance of oxygen vacancies (VO) for the resistance-change memory was investigated with x-ray fluorescence, infrared microscopy, and x-ray absorption spectroscopy using Cr-doped SrTiO3 as example. We propose that the microscopic origin of resistance switching in this class of materials is due to an oxygen-vacancy drift occurring in close proximity to one of the electrodes.

Role of oxygen vacancies in Cr-doped SrTiO3 for resistance-change memory

Solid-state dielectric film capacitors with high-energy-storage density will further promote advanced electronic devices and electrical power systems toward miniaturization, lightweight, and integration In this study, the influence of interface and thickness on energy storage properties of SrTiO3 (STO) films grown on La067Sr033MnO3 (LSMO) electrode are systematically studied The cross-sectional high resolution transmission electron microscopy reveals an ion interdiffusion layer and oxygen vacancies at the STO/LSMO interface The capacitors show good frequency stability and increased dielectric constant with increasing STO thickness (410–710 nm) The breakdown strength (Eb) increases with decreasing STO thickness and reaches 68 MV/cm Interestingly, the Eb under positive field is enhanced significantly and an ultrahigh energy density up to 307 J/cm3 with a high efficiency of 89% is realized The enhanced Eb may be related to the modulation of local electric field and redistribution of oxygen vacancies

Ultrahigh Energy Density in SrTiO3 Film Capacitors

Lead-free film dielectric capacitors with fast charge/discharge capability are very attractive for advanced pulsed power capacitors, but lag behind in energy storage density. Here, we present an effective method to achieve high energy storage performance, which is embedding crystalline polar clusters in amorphous thin films. A large energy density of 65.3 J cm−3, together with a high efficiency of 70.8% as well as excellent thermal stability, can be obtained in lead-free Sr0.995(Na0.5Bi0.5)0.005(Ti0.99Mn0.01)O3 amorphous thin films. It is revealed that anisotropic polar nanometer-scale regions caused by the crystalline polar clusters can be freely switched with the electric field and are not bound by the periodic structure of the crystals, thereby leading to large polarization in the amorphous thin films. Simultaneously, the amorphous thin films also possess good insulation, resulting in improved energy storage performance. Furthermore, a reversible negative electrocaloric effect (the adiabatic temperature change is about −10.6 K at 393 K and about −4.1 K at 300 K) is also obtained. This work provides a feasible and propagable method to develop multifunctional materials for applications in energy harvesting and modern solid state cooling.

Ultrahigh energy storage and electrocaloric performance achieved in SrTiO3 amorphous thin films via polar cluster engineering

Dielectric capacitors have received more and more attention because of fast charge/discharge capability. However, the energy-storage performance still cannot meet the demand. In this work, lead-fre...

Perovskite Sr1-x(Na0.5Bi0.5)xTi0.99Mn0.01O3 Thin Films with Defect Dipoles for High Energy-Storage and Electrocaloric Performance.

Prospects and challenges of perovskite type transparent conductive oxides in photovoltaic applications. Part I – Material developments

Effect of crystallization on the band structure and photoelectric property of SrTiO3 sol–gel derived thin film

The electrical characteristics of SrTiO3/Al2O3 (160 nm up/90 nm down) laminated film capacitors using the sol-gel process have been investigated. SrTiO3 is a promising and extensively studied high-K dielectric material, but its leakage current property is poor. SrTiO3/Al2O3 laminated films can effectively suppress the demerits of pure SrTiO3 films under low electric field, but the leakage current value reaches to 0.1 A/cm2 at higher electric field (>160 MV/m). In this study, a new approach was applied to reduce the leakage current and improve the dielectric strength of SrTiO3/Al2O3 laminated films. Compared to laminated films with Au top electrodes, dielectric strength of laminated films with Al top electrodes improves from 205 MV/m to 322 MV/m, simultaneously the leakage current maintains the same order of magnitude (10−4 A/cm2) until the breakdown occurs. The above electrical characteristics are attributed to the anodic oxidation reaction in origin, which can repair the defects of laminated films at hig...

Electrical characteristics of SrTiO3/Al2O3 laminated film capacitors

The invention relates to a hydrated alumina dielectric thin film with a solid electrolyte function and the preparation of the hydrated alumina dielectric thin film. The hydrated alumina dielectric thin film is prepared from alumina and combined water, wherein the alumina has a dielectric function; the combined water is combined with the alumina and enables the alumina to have the solid electrolyte function. The hydrated alumina dielectric thin film is prepared from the following steps of (1) adding acetylacetone in an aluminum alkoxide solution, adding glacial acetic acid in a mixture after stirring and mixing the mixture, continuously stirring and mixing the mixture, and obtaining a sol precursor after carrying out cooling filtration; (2) attaching the sol precursor to a basal body, obtaining an amorphous alumina thin film through gel solidification after carrying out drying treatment, and obtaining a target product by carrying out hydration thermal treatment on the amorphous alumina thin film. Compared with the prior art, the hydrated alumina dielectric thin film disclosed by the invention has an excellent dielectric function and the solid electrolyte function, and a self-repairing function can be provided for a capacitor; meanwhile, the hydrated alumina dielectric thin film has the advantages that the occupied space is small, the energy storage density of the capacitor can be greatly increased, and the like.

Hydrated alumina dielectric thin film with solid electrolyte function and preparation thereof

The invention relates to a high-energy-storage-density solid-state thin film integrated circuit capacitor and a preparation method therefor. The capacitor comprises a substrate, a lower part electrode and an upper part electrode, wherein the substrate is coated with the lower part electrode; the capacitor also comprises an active strontium titanate thin film; the active strontium titanate thin film is positioned between the upper part electrode and the lower part electrode; the upper part electrode adopts a Ti thin film; and a positive electrode oxide film with a self-recovery function is arranged between the active strontium titanate thin film and the upper part electrode. Compared with the prior art, the capacitor has the advantages of high energy storage density, self recovery, nonexistence of an electrolyte, and the like.

High-energy-storage-density solid-state thin film integrated circuit capacitor and preparation method therefor

The invention relates to a solid-state thin film integrated circuit capacitor having a self-repairing effect. The capacitor comprises a substrate, a lower electrode and an upper electrode, wherein the lower electrode coats the substrate, the capacitor also comprises an active strontium titanate thin film, the active strontium titanate thin film is arranged between the upper electrode and the lower electrode, the upper electrode is an Al thin film, and a layer of anodic oxide film having a self-repairing effect is arranged between the active strontium titanate thin film and the upper electrode. Compared with the prior art, the capacitor has the advantages of high energy storage density, no exist of an electrolyte and the like, and can be self-repaired.

Solid-state thin film integrated circuit capacitor having self-repairing effect and fabrication method thereof

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Kaien Xu

Author Tools

Chat about Author