{"title":"Electrically Tunable Exciton and Telecom-Band Light-Emitting Diodes in Few-Layer Phosphorene.","authors":"Yaning Liang,Jiexi Song,Fengyuan Xuan,Siyuan Wang,Junrong Zhang,Dong Wang,Yun Yao,Cheng Chen,Xiangyi Wang,Yuan Gan,Tianhua Ren,Juanjuan Xing,Junyong Wang,Kai Zhang","doi":"10.1021/acsnano.5c02908","DOIUrl":null,"url":null,"abstract":"Two-dimensional (2D) semiconductors with direct band gaps offer opportunities for constructing ultrathin and compactly integrated light-emitting diodes (LEDs). Current LEDs based on 2D semiconductors mostly work in the visible light spectrum rather than the near-infrared telecommunication band, hindering their incorporation into established applications such as optical computing and communication. In this study, we report on the LED from the bilayer and trilayer phosphorene in the near-infrared regime leveraging the direct bandgap nature of black phosphorus (BP). The layer-number-sensitive electrical field regulation characteristics of bright excitons in bilayer and trilayer phosphorene were revealed. Moreover, the dominating exciton types and emission wavelengths were demonstrated to be dynamically regulated from a single trilayer phosphorene-based LED near 1500 nm by judiciously controlling the electric field and carrier injection conditions. The findings suggest the potential application of 2D semiconductors in miniaturized light source devices operating in the near-infrared telecommunication band.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"48 1","pages":""},"PeriodicalIF":15.8000,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Nano","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsnano.5c02908","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Two-dimensional (2D) semiconductors with direct band gaps offer opportunities for constructing ultrathin and compactly integrated light-emitting diodes (LEDs). Current LEDs based on 2D semiconductors mostly work in the visible light spectrum rather than the near-infrared telecommunication band, hindering their incorporation into established applications such as optical computing and communication. In this study, we report on the LED from the bilayer and trilayer phosphorene in the near-infrared regime leveraging the direct bandgap nature of black phosphorus (BP). The layer-number-sensitive electrical field regulation characteristics of bright excitons in bilayer and trilayer phosphorene were revealed. Moreover, the dominating exciton types and emission wavelengths were demonstrated to be dynamically regulated from a single trilayer phosphorene-based LED near 1500 nm by judiciously controlling the electric field and carrier injection conditions. The findings suggest the potential application of 2D semiconductors in miniaturized light source devices operating in the near-infrared telecommunication band.
期刊介绍:
ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.