Antimony-Hybridization Engineering in p-n Heterojunctions for Optimized Electromagnetic Wave Absorption.

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Electromagnetic wave (EMW) absorption is crucial for shielding applications.
• Optimizing interface polarization in p-n heterojunctions enhances EMW absorption.
• Developing novel materials with superior EMW absorption properties is an ongoing challenge.

Purpose of the Study:

• To develop an innovative Sb-hybridization strategy for constructing p-n heterojunctions.
• To engineer CoS2/Sb2S3@CNFs as a high-performance EMW absorber.
• To investigate the role of built-in electric fields and synergistic loss mechanisms in EMW absorption.

Main Methods:

• An in situ ion-exchange method was employed for Sb hybridization.
• Fabrication of CoS2/Sb2S3@CNFs composite material.
• Characterization of material structure and evaluation of EMW absorption performance.

Main Results:

• The CoS2/Sb2S3@CNFs composite exhibited strong EMW attenuation.
• Achieved a minimum reflection loss (RLmin) of -57.53 dB at 2 mm thickness.
• Obtained an effective absorption bandwidth (EABmax) of 7.28 GHz, covering X and Ku bands.

Conclusions:

• The Sb-hybridization strategy effectively enhances EMW absorption through optimized interface polarization.
• The engineered CoS2/Sb2S3@CNFs composite demonstrates exceptional EMW absorption capabilities.
• P-n heterojunction engineering is significant for designing advanced functional EMW absorbers.