Journal of East China Normal University(Natural Science) ›› 2021, Vol. 2021 ›› Issue (1): 137-143.doi: 10.3969/j.issn.1000-5641.202022010

• Physics and Electronics • Previous Articles     Next Articles

Electric field modulated photoluminescence from WS2 monolayers

Meng FEI, Wei XIE*()   

  1. School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
  • Received:2020-06-11 Online:2021-01-25 Published:2021-01-28
  • Contact: Wei XIE


Two-dimensional materials have been used in applications across a variety of fields; transition metal dichalcogenides(TMDCs), in particular, are a candidate for use in the field of optoelectronics due to the presence of a band gap. In this paper, WS2 monolayers prepared by micro-mechanical exfoliation are transferred to two micro-period electrode structures. We found that the photoluminescence of the material is modulated by external bias. We studied the effects of bias on the photoluminescence of the WS2 monolayer at room temperature and low temperature. The corresponding characteristics and physical mechanisms of the photoluminescence(PL) spectra, moreover, are analyzed and discussed. With the application of bias to modulate the optical properties of the WS2 monolayer, it is expected that the technology can be applied to many photoelectric products, including field effect transistors, photodetectors, flexible electronic devices, and heterojunction devices.

Key words: two-dimensional materials, photoluminescence, bias, monolayers

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