Impact of interfacial charge separation on the superior dielectric properties of novel WO3·H2O/W18O49 heterojunction

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2025-09-12 DOI:10.1007/s12034-025-03471-w

Surbhi Sharma, Jaspreet Kaur, Rajesh Kumar

{"title":"Impact of interfacial charge separation on the superior dielectric properties of novel WO3·H2O/W18O49 heterojunction","authors":"Surbhi Sharma, Jaspreet Kaur, Rajesh Kumar","doi":"10.1007/s12034-025-03471-w","DOIUrl":null,"url":null,"abstract":"<div><p>The elementary and critical process in dielectric capacitors is interfacial charge separation. In this work, we propose the synthesis and investigation of the optical, electrical and dielectric properties of a WO<sub>3</sub>·H<sub>2</sub>O/W<sub>18</sub>O<sub>49</sub> heterojunction with optimized oxygen vacancies for efficient charge storage applications. Tungsten-oxide-based heterojunctions were synthesized via a co-precipitation method using varying HCl concentrations. XRD analysis confirmed the formation of distinct phases, while XPS and Raman spectra revealed effective charge transfer and structural defects. UV-DRS studies highlighted the formation of oxygen-deficient m-W<sub>18</sub>O<sub>49</sub>. Enhanced dielectric constant, low impedance and increased conductivity were observed, particularly with low HCl concentrations, due to improved interfacial charge separation in WO<sub>3</sub>·H<sub>2</sub>O/W<sub>18</sub>O<sub>49</sub> heterojunction. These properties make the WO<sub>3</sub>·H<sub>2</sub>O/W<sub>18</sub>O<sub>49</sub> heterojunction a promising candidate for energy storage applications, offering significant advantages such as improved cyclic stability, power density and reduced heat generation.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 4","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12034-025-03471-w","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The elementary and critical process in dielectric capacitors is interfacial charge separation. In this work, we propose the synthesis and investigation of the optical, electrical and dielectric properties of a WO₃·H₂O/W₁₈O₄₉ heterojunction with optimized oxygen vacancies for efficient charge storage applications. Tungsten-oxide-based heterojunctions were synthesized via a co-precipitation method using varying HCl concentrations. XRD analysis confirmed the formation of distinct phases, while XPS and Raman spectra revealed effective charge transfer and structural defects. UV-DRS studies highlighted the formation of oxygen-deficient m-W₁₈O₄₉. Enhanced dielectric constant, low impedance and increased conductivity were observed, particularly with low HCl concentrations, due to improved interfacial charge separation in WO₃·H₂O/W₁₈O₄₉ heterojunction. These properties make the WO₃·H₂O/W₁₈O₄₉ heterojunction a promising candidate for energy storage applications, offering significant advantages such as improved cyclic stability, power density and reduced heat generation.

Graphical abstract

Abstract Image

查看原文本刊更多论文

界面电荷分离对新型WO3·H2O/W18O49异质结优越介电性能的影响

介电电容器的基本和关键过程是界面电荷分离。在这项工作中，我们提出了具有优化氧空位的WO3·H2O/W18O49异质结的光学，电学和介电性质的合成和研究，以实现高效电荷存储应用。采用不同浓度的盐酸共沉淀法合成了氧化钨基异质结。XRD分析证实了不同相的形成，而XPS和拉曼光谱显示了有效的电荷转移和结构缺陷。UV-DRS研究强调了缺氧m-W18O49的形成。由于改善了WO3·H2O/W18O49异质结的界面电荷分离，特别是在低HCl浓度下，观察到介电常数增强，低阻抗和电导率增加。这些特性使WO3·H2O/W18O49异质结成为储能应用的有希望的候选者，具有显著的优势，如提高循环稳定性，功率密度和减少热量产生。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.