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Probing charge transfer in 2D MoS2/tellurene type-II p–n heterojunctions

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Abstract

2D heterostructures offer new opportunities for harnessing a wider range of the solar spectrum in high-performance photovoltaic devices. Here, we explore a type-II p–n heterojunction, by exploiting air-stable tellurene (Te) in combination with MoS2, to study its charge transfer for photovoltaic applications. The charge transfer of MoS2/Te heterojunction is confirmed by photoluminescence spectroscopy, Raman spectroscopy and Kelvin probe force microscopy. The exciton binding energy for MoS2/Te heterojunction is estimated to be around 10 meV, which is much lower than that for monolayer MoS2. This strategy can be exploited to develop next-generation intrinsically ultrathin light-harvesting devices.

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Acknowledgments

The authors are grateful for the financial support of this project by the U.S. National Science Foundation (Awards # 1831133 and #2122044). S.H. acknowledges the support from the National Science Foundation under Grant No. ECCS-1943895. This work was performed in part at the Duke University Shared Materials Instrumentation Facility (SMIF), a member of the North Carolina Research Triangle Nanotechnology Network, which is supported by the National Science Foundation under Grant ECCS-1542015 as part of the National Nanotechnology Coordinated Infrastructure.

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Author notes

  1. Tej B. Limbu

    Present address: Department of Physical and Applied Sciences, University of Houston-Clear Lake, Houston, TX, 77058, USA

Authors and Affiliations

  1. Department of Chemistry and Biochemistry, North Carolina Central University, Durham, NC, 27707, USA

    Basant Chitara, Martha Y. Garcia Cervantes, Tej B. Limbu, Bikram Adhikari & Fei Yan

  2. Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA

    Kunyan Zhang & Shengxi Huang

Authors
  1. Basant Chitara
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  2. Kunyan Zhang
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  3. Martha Y. Garcia Cervantes
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  4. Tej B. Limbu
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  5. Bikram Adhikari
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  6. Shengxi Huang
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  7. Fei Yan
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Contributions

BC conceived the idea and performed device integration, BC, MC, TL and BA carried out the synthesis and characterization, KZ and SH performed low-temperature PL measurements, BC, KZ and SH analyzed the results. All authors reviewed and revised the manuscript. FY supervised the project.

Corresponding author

Correspondence to Fei Yan.

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Authors have no conflict of interest.

Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Chitara, B., Zhang, K., Cervantes, M.Y.G. et al. Probing charge transfer in 2D MoS2/tellurene type-II p–n heterojunctions. MRS Communications 11, 868–872 (2021). https://doi.org/10.1557/s43579-021-00117-w

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  • DOI: https://doi.org/10.1557/s43579-021-00117-w

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