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Updated: Oct 13, 2025

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2D Bi2Se3 materials for optoelectronics.

Fakun K Wang1, Sijie J Yang1, Tianyou Y Zhai1

  • 1State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.

Iscience
|November 12, 2021
PubMed
Summary

Two-dimensional (2D) bismuth selenide (Bi2Se3) is a topological insulator with unique electronic properties. Its potential for advanced optoelectronic devices is explored, covering synthesis, properties, and applications.

Keywords:
Materials applicationNanomaterialsOptoelectronics

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) layered materials exhibit remarkable properties.
  • Bismuth selenide (Bi2Se3) is a topological insulator with insulating bulk and metallic surface states.
  • Its unique structure offers potential for optoelectronics.

Purpose of the Study:

  • To provide a comprehensive summary of recent advances in 2D Bi2Se3 materials.
  • To discuss the structure, properties, preparation, and applications of 2D Bi2Se3.
  • To highlight challenges and future prospects in the field.

Main Methods:

  • Review of existing literature on 2D Bi2Se3.
  • Description of synthesis approaches: solution synthesis and van der Waals epitaxy.
  • Analysis of optoelectronic properties and applications.

Main Results:

  • 2D Bi2Se3 possesses broadband optical absorption, thickness-dependent bandgap, and polarization-sensitive photoresponse.
  • Demonstrated potential in visible-infrared detection, terahertz detection, and opto-spintronic devices.
  • Synthesis methods enable controlled preparation of 2D Bi2Se3.

Conclusions:

  • 2D Bi2Se3 is a promising material for next-generation optoelectronic applications.
  • Further research is needed to overcome current challenges and realize its full potential.
  • Continued development is expected in synthesis and device integration.