Investigation of the Effect of Substrate Thickness on Absorption of TMDC Monolayers in the Visible Wavelength

Ghorbani, Farinaz; Mohebbi, Ensiyeh

Document Type : Research

Authors

Farinaz Ghorbani ¹
ensiyeh mohebbi ²

¹ Department of Physics, Alzahra University, Tehran, Iran.

² null

Abstract

Two-dimensionam transition-metal dichalcogenides (TMDC) layers with direct bandgaps have made a new horizon for application in photonics and electroptics. The presence of bandgap causes a significant absorption useful in photovoltaic devices. When these layers are located on a substrate that leads to a frequent optical reflection thus affect the absorption. Typically, SiO₂ or Si or their combination as a substrate is used for these monolayers. In this paper, we used a transfer matrix method to study the absorption spectra of TMDC monolayers including MoSe₂, WSe₂, MoS₂ and WS₂ with the presence of SiO₂/ Si substrate with different thicknesses of SiO₂ layer. We found that using the SiO₂ layer with a thickness of 90 nm in SiO₂/ Si substrate does not change the general behavior of absorption and increases the absorption in some regions of the wavelength range.

Keywords

20.1001.1.27831752.1396.2.2.6.3

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Quarterly Journal of Optoelectronic

Investigation of the Effect of Substrate Thickness on Absorption of TMDC Monolayers in the Visible Wavelength

References

References

Volume 2, Issue 2 - Serial Number 6
June 2019
Pages 51-56

Investigation of the Effect of Substrate Thickness on Absorption of TMDC Monolayers in the Visible Wavelength

References

References

Volume 2, Issue 2 - Serial Number 6June 2019Pages 51-56

Volume 2, Issue 2 - Serial Number 6
June 2019
Pages 51-56