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Related Experiment Video

Updated: Jan 1, 2026

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

Bridging the van der Waals Interface for Advanced Optoelectronic Devices.

Yao Wen¹, Peng He², Yuyu Yao²

¹School of Physics and Technology, Wuhan University, Wuhan, 430072, China.

Advanced Materials (Deerfield Beach, Fla.)

|December 24, 2019

Summary

Researchers developed a new method to bridge the van der Waals (vdW) gap in heterostructures, significantly improving photoexcited carrier injection and device performance. This strategy enhances optoelectronic properties by eliminating tunneling barriers in layered materials.

Keywords:

artificial vacancies bridged heterostructures optoelectronic devices orbital hybridization vdW gap

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Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

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Published on: October 12, 2019

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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Published on: July 5, 2019

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Van der Waals (vdW) heterostructures offer unique optoelectronic properties.
The vdW gap in these heterostructures creates a tunneling barrier, hindering photoexcited carrier injection and increasing resistance.

Purpose of the Study:

To present a generic strategy for eliminating the vdW gap in heterostructures.
To enhance the performance of optoelectronic devices based on heterostructures.

Main Methods:

Bridging the vdW gap via strong orbital hybridization.
Utilizing interface dangling bonds of nonlayered chalcogenide semiconductors and induced vacancies in transition metal chalcogenides (TMDCs).

Main Results:

Achieved significantly reduced photoresponse times (≈30–51 µs) in bridged heterostructures like PbS/ReS₂, PbS/MoSe₂, and PbS/MoS₂.
Demonstrated photon-triggered on/off ratios exceeding 10⁵–10⁶ in bridged heterostructures (e.g., PbS/MoS₂, ZnSe/MoS₂, ZnTe/MoS₂), several orders of magnitude higher than conventional vdW heterostructures.

Conclusions:

The developed strategy effectively eliminates the vdW gap and associated tunneling barriers.
This versatile approach overcomes performance limitations in vdW heterostructures, paving the way for advanced optoelectronic applications.