Ultra-Low Ultraviolet Photon Detection of Diamondene Van der Waals Heterostructure by Interfacial Bonding.

Authors

Jiapeng Zhen, Silin Guo, Ying Yue, Shuai Huang, Danping Zhang, Kai Shen, Kehong Lv, Qiushi Huang, Jing Qiu, Guanjun Liu

Published in

Research (Washington, D.C.). Volume 8. Pages 0806. Epub Aug 04, 2025.

Abstract

With the increasing demand for high sensitivity, low interference, and micro-size of deep ultraviolet spectral information in the field of photoelectric detection, low-dimensional diamond-based ultraviolet photoelectric detection has attracted great interest. However, although the diamond-based material has a high mobility, its lack of free electrons seriously hinders its conductivity and detection ability. Therefore, improving the free electron level of diamond-based materials has become the primary goal for achieving high-performance applications. Here, we demonstrate a diamondene photodetector formed by van der Waals heterostructure bonding, which has a high level of free electrons and is more advantageous for ultraviolet light. The diamondene photodetector realized by this method has a high responsivity of 2.04 A/W and D* higher than 10¹² Jones, and the external quantum efficiency is as high as $1.1\times {10}^3\%$ . In the detection of imaging applications, ultraviolet imaging with very low photon number is realized, and clear imaging can be achieved only under the light intensity with a photon number of 28. It is of great substantial for the development and theoretical research of ultra-high sensitivity ultraviolet photodetectors in the future.

PMID:
40761891
Bibliographic data and abstract were imported from PubMed on 05 Aug 2025.

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