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High-performance polarization-sensitive photodetector based on a few-layered PdSe2 nanosheet

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Abstract

The extraordinary optical and electronic properties of anisotropic two-dimensional materials, such as black phosphorus, ReS2, and GeSe, enable them a promising component of polarization-sensitive photodetectors. However, these applications are significantly limited by the challenges of air-stability, response time, and linearly dichroic ratio. Interestingly, palladium diselenide (PdSe2) with high air stability is an emerging material that has robust in-plane anisotropy induced by its asymmetric pentagonal lattice structure. We have successfully prepared a few-layer PdSe2 using micromechanical exfoliation, and here we demonstrate the strong linear dichroism behavior of PdSe2 by polarization-resolved absorption spectra measurements. Such unique linear dichroism, endows the PdSe2 photodetector powerful ability to detect polarized light. The photodetector based on 5L PdSe2, as tested with polarization-dependent photocurrent mapping, exhibited competitive capability to detect polarized light, achieving a significant photocurrent on/off ratio (> 102), the quite fast response time (< 11 ms) and robust linearly dichroic ratios (/max//min ≈ 1.9 at 532 nm). These results are essential advance in the development of polarization-sensitive photodetector, a crucial step towards opening up a new avenue for the application of 2D optoelectronic devices.

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Acknowledgements

Y. P. L. would like to thank Prof. Wang Yunpeng for his useful discussions. This work was supported by the National Natural Science Foundation of China (No. 61775241), Youth Innovation Team (No. 2019012) of CSU, Hunan province key research and development project (No. 2019GK2233), the Science and Technology Innovation Basic Research Project of Shenzhen (No. JCYJ20180307151237242), and the Project of State Key Laboratory of High-Performance Complex Manufacturing, Central South University (No. ZZYJKT2020-12). Z. W. L. acknowledges the funding support from the Australian Research Council (ARC Discovery Projects, DP180102976).

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Authors and Affiliations

  1. School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University, Changsha, 410083, China

    Jiahong Zhong, Juan Yu, Lingkai Cao, Cheng Zeng, Junnan Ding & Yanping Liu

  2. School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China

    Juan Yu

  3. School of Information Science and Technology, Fudan University, Shanghai, 200433, China

    Chunxiao Cong

  4. School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia

    Zongwen Liu

  5. Shenzhen Research Institute of Central South University, Shenzhen, 518057, China

    Yanping Liu

  6. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, 410083, China

    Yanping Liu

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  1. Jiahong Zhong
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Correspondence to Yanping Liu.

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Zhong, J., Yu, J., Cao, L. et al. High-performance polarization-sensitive photodetector based on a few-layered PdSe2 nanosheet. Nano Res. 13, 1780–1786 (2020). https://doi.org/10.1007/s12274-020-2804-y

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  • DOI: https://doi.org/10.1007/s12274-020-2804-y

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