Polarization-Sensitive Photodetector Based on WSe<sub>2</sub>/As<sub>0.6</sub>P<sub>0.4</sub>/WS<sub>2</sub> Heterojunction

The rapid advancements in optoelectronics and their widespread applications have spurred the development of high-performance photodetectors. This study presents a dual-van der Waals heterostructure photodetector, composed of WSe<sub>2</sub>, As<sub>0.6</sub>P<sub>0.4</sub>, and WS<sub>2</sub>. It demonstrates outstanding polarization-sensitive light detection without external bias, with a sensitivity of 487 mA/W, a detection capability of 6.09 × 10<sup>11</sup> Jones, and an external quantum efficiency (EQE) of 95% at 635 nm, along with rise/fall times of 18-36 ms. The device also exhibits notable anisotropic polarization sensitivity (4.8 at 405 nm). With its broad spectral coverage (400-1100 nm), fast response, and high sensitivity, this photodetector shows significant promise for imaging applications. The development of anisotropic van der Waals heterojunctions provides a key reference for the design of high-performance, self-powered polarization photodetectors.

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Publication Details

Journal
The Journal of Physical Chemistry Letters
Published
2025-08-28
DOI
https://doi.org/10.1021/acs.jpclett.5c02320
Citations
1
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
0.52

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Polarization-Sensitive Photodetector Based on WSe2/As0.6P0.4/WS2 Heterojunction

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Polarization-Sensitive Photodetector Based on WSe2/As0.6P0.4/WS2 Heterojunction

Jingxian Xiong, Chu Zhou, Nanshou Wu, Jielian Zhang, Jingjing Deng, Jingbo Li, Yingxin Yang, Sina Li
article en
1 citations

Abstract

The rapid advancements in optoelectronics and their widespread applications have spurred the development of high-performance photodetectors. This study presents a dual-van der Waals heterostructure photodetector, composed of WSe<sub>2</sub>, As<sub>0.6</sub>P<sub>0.4</sub>, and WS<sub>2</sub>. It demonstrates outstanding polarization-sensitive light detection without external bias, with a sensitivity of 487 mA/W, a detection capability of 6.09 × 10<sup>11</sup> Jones, and an external quantum efficiency (EQE) of 95% at 635 nm, along with rise/fall times of 18-36 ms. The device also exhibits notable anisotropic polarization sensitivity (4.8 at 405 nm). With its broad spectral coverage (400-1100 nm), fast response, and high sensitivity, this photodetector shows significant promise for imaging applications. The development of anisotropic van der Waals heterojunctions provides a key reference for the design of high-performance, self-powered polarization photodetectors.

The Journal of Physical Chemistry LettersVol. 16(35)
National University of Defense Technology (CN), South China Normal University (CN), Nanjing University of Information Science and Technology (CN), Frontier Medical College (PK), Nanjing University of Science and Technology (CN), Frontier Science Foundation (CH), Guangdong Polytechnic Normal University (CN), Frontier Aerospace Corporation (United States) (US), Optica (US), Zhejiang University (CN), Nanjing University (CN)
Guangdong Provincial Pearl River Talents Program, Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 34%
2D Materials and Applications
0.52
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