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Related Experiment Video

Updated: Jul 4, 2026

Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
11:27

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High-Performance KV3Sb5/WSe2 Van Der Waals Photodetectors.

Yang Yang1,2, Shaofeng Rao1,2, Yuxuan Hou1,2

  • 1Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin, China.

Small (Weinheim an Der Bergstrasse, Germany)
|July 3, 2026
PubMed
Summary

We developed high-performance photodetectors using Kagome metal KV3Sb5 and WSe2. These van der Waals heterostructures show great potential for advanced photodetection applications.

Keywords:
KV3Sb5kagome metalphotodetectorvan der Waals heterojunction

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Kagome metals AV3Sb5 are known for correlated and topological quantum states.
  • Their optoelectronic applications are largely unexplored.
  • Van der Waals heterostructures offer tunable electronic properties.

Purpose of the Study:

  • To investigate the optoelectronic properties of Kagome metals.
  • To develop high-performance photodetectors using KV3Sb5.
  • To explore KV3Sb5-based van der Waals heterostructures.

Main Methods:

  • Fabrication of van der Waals heterojunctions using KV3Sb5 and WSe2.
  • Characterization of the Schottky interface between KV3Sb5 and WSe2.
  • Performance testing of the photodetector under 520 nm illumination.

Main Results:

  • A high-quality Schottky interface was formed, facilitating efficient carrier separation and transport.
  • The photodetector achieved an open-circuit voltage of 0.6 V.
  • The device exhibited a responsivity of 809 mA/W and a fast response time of 18.3 µs.

Conclusions:

  • KV3Sb5-based van der Waals heterostructures show significant promise for optoelectronic applications.
  • The developed photodetector demonstrates high performance.
  • This work opens new avenues for utilizing Kagome metals in advanced photodetection technologies.