Detailed photocurrent spectroscopy of the semiconducting group VIB transition metal dichalcogenides

  • Kam K
  • Parkinson B
  • 104

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Abstract

The photocurrent spectra of single crystals of the semiconducting group VI transition metal dichalcogenides (MoS2, WS2, WSe2, and MoSe2) were measured as a function of crystal orientation and surface morphology as well as the polarization and the angle of incidence of the incident radiation. The spectra were analyzed with a band edge analysis revised to include the diffusion of carriers, and estimates of the transition energies were obtained. Structure corresponding to the excitonic transitions was also observed. The results were discussed with respect to the applicability of these materials to solar energy conversion

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Authors

  • K. K. Kam

  • B. A. Parkinson

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