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Nonvolatile Homogeneous InSe Transistors Regulated by Substrate Engineering.

Tieying Ma1, Yunchi Wang1,2, Guojin Feng3

  • 1College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310013, China.

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Summary
This summary is machine-generated.

This study demonstrates nonvolatile control of two-dimensional Indium Selenide (InSe) doping using substrate engineering, enabling high-performance, tunable PN junctions for advanced electronics.

Keywords:
InSegate voltagehomogeneous PN junctionlaserrectification characteristics

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials offer unique electronic properties.
  • Controlling carrier polarity in 2D materials is crucial for device fabrication.
  • Substrate engineering is a promising approach for tuning material properties.

Purpose of the Study:

  • To achieve controllable p-type and n-type doping on the same 2D InSe material.
  • To construct and characterize a high-performance homogeneous PN junction based on engineered InSe.
  • To investigate the dynamic regulation of device characteristics via gate voltage and laser irradiation.

Main Methods:

  • Substrate engineering using hexagonal boron nitride (h-BN) and multilayer graphene (MLG)/SiO2.
  • Fabrication of homogeneous PN junctions using doped 2D InSe.
  • Electrical characterization under varying gate voltages and laser irradiation.
  • Construction and analysis of NMOS and PMOS transistors on InSe.

Main Results:

  • Controllable p-type and n-type doping of 2D InSe achieved via substrate selection.
  • High-performance homogeneous PN junction demonstrated with gate-tunable rectification ratios from 10 to over 10^7.
  • Broadband laser irradiation (280-965 nm) effectively regulated rectification.
  • Nonvolatile doping achieved, overcoming limitations of traditional field-induced carriers.
  • NMOS and PMOS transistors exhibited cooperatively regulated output characteristics.

Conclusions:

  • Substrate engineering provides a nonvolatile method for polarity control in 2D InSe.
  • The developed InSe PN junction exhibits superior gate and light-tunable performance.
  • This approach holds significant potential for optoelectronic integration and reconfigurable electronics.