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      Interfacial charge and energy transfer in van der Waals heterojunctions

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      Author(s)
      Hu, Zehua
      Liu, Xue
      Hernández-Martínez, Pedro Ludwig
      Zhang, Shishu
      Gu, Peng
      Du, Wei
      Xu, Weigao
      Demir, Hilmi Volkan
      Liu, Haiyun
      Xiong, Qihua
      Date
      2022-03
      Source Title
      InfoMat
      Electronic ISSN
      2567-3165
      Publisher
      John Wiley and Sons Inc
      Volume
      4
      Issue
      3
      Pages
      1 - 21
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Van der Waals heterojunctions are fast-emerging quantum structures fabricated by the controlled stacking of two-dimensional (2D) materials. Owing to the atomically thin thickness, their carrier properties are not only determined by the host material itself, but also defined by the interlayer interactions, including dielectric environment, charge trapping centers, and stacking angles. The abundant constituents without the limitation of lattice constant matching enable fascinating electrical, optical, and magnetic properties in van der Waals heterojunctions toward next-generation devices in photonics, optoelectronics, and information sciences. This review focuses on the charge and energy transfer processes and their dynamics in transition metal dichalcogenides (TMDCs), a family of quantum materials with strong excitonic effects and unique valley properties, and other related 2D materials such as graphene and hexagonal-boron nitride. In the first part, we summarize the ultrafast charge transfer processes in van der Waals heterojunctions, including its experimental evidence and theoretical understanding, the interlayer excitons at the TMDC interfaces, and the hot carrier injection at the graphene/TMDCs interface. In the second part, the energy transfer, including both Förster and Dexter types, are reviewed from both experimental and theoretical perspectives. Finally, we highlight the typical charge and energy transfer applications in photodetectors and summarize the challenges and opportunities for future development in this field. © 2022 The Authors. InfoMat published by UESTC and John Wiley & Sons Australia, Ltd.
      Keywords
      2-dimensional semiconductors
      Carrier dynamics
      Charge and energy transfer
      Optical spectroscopy
      Optoelectronics
      Permalink
      http://hdl.handle.net/11693/111843
      Published Version (Please cite this version)
      https://dx.doi.org/10.1002/inf2.12290
      Collections
      • Department of Electrical and Electronics Engineering 4011
      • Department of Physics 2550
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
      • Nanotechnology Research Center (NANOTAM) 1179
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