Refractive index database

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Optical constants of MoO3 (Molybdenum trioxide)
Stelling et al. 2017: Thin film; n,k 0.301–0.899 µm

Wavelength: µm

Complex refractive index (n+ik)[ i ]

n   k   LogX   LogY   eV

Derived optical constants


Isotropic MoO3> film.


C. Stelling, C. R. Singh, M. Karg, T. A. F. König, M. Thelakkat, M. Retsch. Plasmonic nanomeshes: their ambivalent role as transparent electrodes in organic solar cells, Sci. Rep. 7, 42530 (2017) - see Supplementary materials
(Numerical data kindly provided by Tobias König)


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Molybdenum trioxide, MoO3

Molybdenum trioxide (MoO3) is a compound of molybdenum and oxygen. It appears as an odorless, light-colored crystalline solid. It is a primary component in the production of molybdenum metal. In the field of optics, thin films of MoO3 can be deposited on various substrates, serving as layers in certain optoelectronic devices due to its semiconducting properties. The compound is also investigated for potential uses in energy storage and sensor applications. Additionally, its transparency to infrared radiation makes it a candidate for specific optical applications in the IR range.

Other names

  • Molybdic anhydride
  • Molybdite
  • Molybdic trioxide
  • Molybdenum(VI) oxide

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