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PbSe-Modified Graphene/Si Heterojunction for Self-Powered Broadband Detection with Dual-Light Modulation Effects
Chan Yang1, Yang Xiang1,2, Dong Yang1,3
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.
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.
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