Ferroelectric Tuning of Excitons in Sc2CO2/WSe2 Heterostructures

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zhe Zhang, Shudong Wang
{"title":"Ferroelectric Tuning of Excitons in Sc2CO2/WSe2 Heterostructures","authors":"Zhe Zhang, Shudong Wang","doi":"10.1002/aelm.202500432","DOIUrl":null,"url":null,"abstract":"Van der Waals heterostructures serve as ideal platforms for regulating exciton states. The introduction of ferroelectric materials has provided a new strategy for heterostructure exciton engineering. In this study, the electronic structures and excitonic optical properties of ferroelectric‐based heterostructure Sc<jats:sub>2</jats:sub>CO<jats:sub>2</jats:sub>↓/WSe<jats:sub>2</jats:sub> and Sc<jats:sub>2</jats:sub>CO<jats:sub>2</jats:sub>↑/WSe<jats:sub>2</jats:sub> with different out‐of‐plane polarization directions have been investigated by the <jats:italic>GW</jats:italic>+BSE formalism. The findings show that out‐of‐plane polarization can realize the transition of heterostructure band alignment from Type I to Type II by regulating the band structure of the adsorbed layer WSe<jats:sub>2</jats:sub>, significantly enhancing carrier separation efficiency. More importantly, changing the out‐of‐plane polarization direction enables dynamic regulation of the bright‐dark attributes of heterostructure exciton states, achieving an optically switchable mechanism analogous to binary ″0″ and ″1″. Additionally, out‐of‐plane polarization exhibits significant regulatory effects on the optical absorption characteristics and radiative lifetimes of excitons. This study not only clarifies the effective modulation of ferroelectric polarization direction on the electronic structures of heterostructure but also reveals its unique advantages in manipulating the excitation behavior of optoelectronic devices.","PeriodicalId":110,"journal":{"name":"Advanced Electronic Materials","volume":"41 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Electronic Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aelm.202500432","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Van der Waals heterostructures serve as ideal platforms for regulating exciton states. The introduction of ferroelectric materials has provided a new strategy for heterostructure exciton engineering. In this study, the electronic structures and excitonic optical properties of ferroelectric‐based heterostructure Sc2CO2↓/WSe2 and Sc2CO2↑/WSe2 with different out‐of‐plane polarization directions have been investigated by the GW+BSE formalism. The findings show that out‐of‐plane polarization can realize the transition of heterostructure band alignment from Type I to Type II by regulating the band structure of the adsorbed layer WSe2, significantly enhancing carrier separation efficiency. More importantly, changing the out‐of‐plane polarization direction enables dynamic regulation of the bright‐dark attributes of heterostructure exciton states, achieving an optically switchable mechanism analogous to binary ″0″ and ″1″. Additionally, out‐of‐plane polarization exhibits significant regulatory effects on the optical absorption characteristics and radiative lifetimes of excitons. This study not only clarifies the effective modulation of ferroelectric polarization direction on the electronic structures of heterostructure but also reveals its unique advantages in manipulating the excitation behavior of optoelectronic devices.
Sc2CO2/WSe2异质结构中激子的铁电调谐
范德华异质结构是调控激子态的理想平台。铁电材料的引入为异质结构激子工程提供了新的策略。本研究采用GW+BSE形式研究了具有不同面外极化方向的铁电基异质结构Sc2CO2↓/WSe2和Sc2CO2↑/WSe2的电子结构和激子光学性质。研究结果表明,面外极化通过调节吸附层WSe2的能带结构,实现了异质结构带取向从I型向II型的转变,显著提高了载流子分离效率。更重要的是,改变平面外偏振方向可以动态调节异质结构激子状态的明暗属性,实现类似于二进制″0″和″1″的光学可切换机制。此外,平面外偏振对激子的光吸收特性和辐射寿命有显著的调节作用。本研究不仅阐明了铁电极化方向对异质结构电子结构的有效调制,而且揭示了其在操纵光电器件激发行为方面的独特优势。
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
Advanced Electronic Materials
Advanced Electronic Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
11.00
自引率
3.20%
发文量
433
期刊介绍: Advanced Electronic Materials is an interdisciplinary forum for peer-reviewed, high-quality, high-impact research in the fields of materials science, physics, and engineering of electronic and magnetic materials. It includes research on physics and physical properties of electronic and magnetic materials, spintronics, electronics, device physics and engineering, micro- and nano-electromechanical systems, and organic electronics, in addition to fundamental research.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信