Journal of Electronic Science and Technology, Volume. 23, Issue 2, 100305(2025)

2D PdSe2: Pioneering innovations in polarized photodetection

Waqas Ahmad1,*... Amine El Moutaouakil2, Wen Lei3, and Zhi-Ming Wang14,* |Show fewer author(s)
Author Affiliations
  • 1Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China
  • 2College of Engineering, United Arab Emirates University, Al Ain, 15551, United Arab Emirates
  • 3Department of Electrical, Electronic and Computer Engineering, The University of Western Australia, Perth, 6009, Australia
  • 4Shimmer Center, Tianfu Jiangxi Laboratory, Chengdu, 641419, China
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    Figures & Tables(4)
    General synthesis techniques for PdSe2. (a) Schematic diagram of CVD setup for synthesizing the flakes of PdSe2. (b) Pentagonal crystal structure of PdSe2. (c) Raman spectra of PdSe2 to confirm the crystal structure of PdSe2. Reproduced with the permission from Ref. [19]. Copyright 2021, Wiley-VCH. (d) Schematic illustrations of 3 zones systems of CVD. (e) Photographs of achieved PdSe2 flakes with different number of layers. Reproduced with the permission from Ref. [20]. Copyright 2022, Springer Nature. (f) Schematic presentation of electrochemical intercalation reaction of bulk PdSe2 crystals. (g) Raman spectra of 7 nm-thick TBA-PaSe2 superlattice and 3 nm-thick pristine PaSe2. Reproduced with the permission from Ref. [21]. Copyright 2024, Wiley-VCH.
    Photophysical properties of PdSe2. (a) Graph of PdSe2 with different thickness. (b) Values of the optical bandgaps extracted from Fig. 2(a) with different layer numbers. Reproduced with the permission from Ref. [27]. Copyright 2019, Wiley-VCH. (c) Bandgap value of PdSe2 at 300 K. Reproduced with the permission from Ref. [28]. Copyright 2022, Wiley-VCH. (d) Polar plots depicting the peak intensities of the Ag mode as a function of the polarization angle in parallel configurations. (e) Polar plot illustrating the photocurrent of the device at a gate bias of 50 V and a wavelength of 532 nm, shown as a function of the polarization angle. Reproduced with the permission from Ref. [18]. Copyright 2019, Wiley-VCH. (f) Schematic diagram of device structure with 6 pair electrodes. (g) Output properties of PdSe2 based device at different angle. (h) Polar plot of angle depended on conductance. Reproduced with the permission from Ref. [32]. Copyright 2021, Wiley-VCH.
    Recent progress of photodetectors and their applications based on PdSe2. (a) Schematic diagram of polarized photodetection based on few-layer PdSe2. (b) Angle resolved photocurrent including in-line polarization plot based on few-layer PdSe2. Reproduced with the permission from Ref.[32]. Copyright 2021, Wiley-VCH. (c) Optical image of MoS2/PdSe2 vdWs heterostructure for polarization detection. (d) Comparison of polarization detection of MoS2/PdSe2 vdWs heterostructure with other 2D vdWs heterostructure technologies. Reproduced with the permission from Ref. [37]. Copyright 2024, Wiley-VCH. (e) Polarized time resolved photoresponse of the PdSe2/Te photodetector device at the wavelength of 4000 nm. (f) Polar diagram of polarized responsivity of PdSe2/Te at the wavelength of 4000 nm. Reproduced with permission from Ref. [38]. Copyright 2024, Wiley-VCH. (g) Schematic diagram of polarization system setup based on the PdSe2/SiNWA heterostructure. (h) Photocurrent as a function of polarized angle. Reproduced with the permission from Ref. [40]. Copyright 2020, Royal Society of Chemistry. (i) Comparison of the polarization sensitivity (dichroic ratio) of the PdSe2/GaN (2D/3D) photodetector with other 2D materials and their vdWs heterostructure photodetector devices. Reproduced with the permission from Ref. [41]. Copyright 2022, American Chemical Society.
    • Table 1. Advantages and disadvantages of PdSe2 compared to conventional 2D materials.

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      Table 1. Advantages and disadvantages of PdSe2 compared to conventional 2D materials.

      AdvantagesDisadvantages
      Strong intrinsic in-plane anisotropy for polarization-sensitive applications.Lower carrier mobility compared to BP.
      Broad bandgap tunability (0–1.3 eV) for visible to mid-infrared detection.Relatively less research maturity and optimization.
      High air stability under ambient conditions.Challenges in achieving scalable synthesis techniques.
      High responsivity and sensitivity across a broad spectral range.Polarization performance affected by defects and grain boundaries.
      Compatibility with heterostructures for advanced device integration.Limited availability of standard fabrication processes.
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    Waqas Ahmad, Amine El Moutaouakil, Wen Lei, Zhi-Ming Wang. 2D PdSe2: Pioneering innovations in polarized photodetection[J]. Journal of Electronic Science and Technology, 2025, 23(2): 100305

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    Paper Information

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    Received: Oct. 15, 2024

    Accepted: Feb. 26, 2025

    Published Online: Jun. 16, 2025

    The Author Email: Ahmad Waqas (ahmawaqas2d@uestc.edu.cn), Wang Zhi-Ming (zhmwang@uestc.edu.cn)

    DOI:10.1016/j.jnlest.2025.100305

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