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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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PbSe-Modified Graphene/Si Heterojunction for Self-Powered Broadband Detection with Dual-Light Modulation Effects.

Chan Yang¹, Yang Xiang^1,2, Dong Yang^1,3

¹Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China.

ACS Applied Materials & Interfaces

|September 26, 2025

Summary

Researchers developed a self-powered broadband photodetector using graphene/Si heterojunctions. This novel device demonstrates a unique dual-light modulation effect for advanced optoelectronic signal control and imaging applications.

Keywords:

PbSe-modified graphene/Si broadband photodetector dual-light modulation effects heterojunction

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Area of Science:

Optoelectronics
Materials Science
Nanotechnology

Background:

Self-powered broadband photodetectors are crucial for sensing, communication, and imaging.
Existing devices often face limitations in performance and tunability.

Purpose of the Study:

To develop a high-performance, self-powered broadband photodetector.
To explore a novel dual-light modulation mechanism for optoelectronic signal control.

Main Methods:

Electrochemical synthesis of PbSe cubic crystal-modified graphene/Si heterojunction.
Characterization of photoelectric properties and detectivity.
Investigation of the dual-light modulation effect.

Main Results:

Achieved high detectivity (D* = 3.59 × 10^10 Jones at 1550 nm).
Demonstrated a novel dual-light modulation effect by dynamically shifting the graphene Fermi level.
Confirmed potential for imaging applications.

Conclusions:

The PbSe/graphene/Si photodetector offers excellent performance and a new mechanism for dynamic optoelectronic signal control.
This work paves the way for advanced imaging and sensing technologies.