Extinction coefficient modulation of moo3 films doped with plasmonic nanoparticles: From an effective medium theory description

Gesuri Morales-Luna, Michael Morales-Luna

Research output: Contribution to journalArticlepeer-review


This work focused on the application of the effective medium theory to describe the extinction coefficient (Qext) in molybdenum trioxide (MoO3) doped with different kinds of plasmonic nanoparticles, such as silver (Ag), gold (Au), and copper (Cu). Usually, in studies of these materials, it is normal to analyze the transmission or absorption spectra. However, the effect of this type or size of nanoparticles on the spectra is not as remarkable as the effect that is found by analyzing the Qext of MoO3. It was shown that the β-phase of MoO3 enhanced the intensity response of the Qext when compared to the α-phase of MoO3. With a nanoparticle size of 5 nm, the Ag-doped MoO3 was the configuration that presents the best response in Qext. On the other hand, Cu nanoparticles with a radius of 20 nm embedded in MoO3 was the configuration that presented intensities in Qext similar to the cases of Au and Ag nanoparticles. Therefore, implementing the effective medium theory can serve as a guide for experimental researchers for the application of these materials as an absorbing layer in photovoltaic cells.

Original languageEnglish
Article number2050
Pages (from-to)1-16
Number of pages16
Issue number8
Publication statusPublished - 12 Aug 2021

Bibliographical note

Funding Information:
Acknowledgments: M.M.-L. and G.M.-L. thank UDEM and IBERO for the financial support.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)


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