Enhanced visibility of MoS2, MoSe2, WSe2 and black-phosphorus: Making optical identification of 2D semiconductors easier

Gabino Rubio-Bollinger, Ruben Guerrero, David Perez de Lara, Jorge Quereda, Luis Vaquero-Garzon, Nicolas Agraït, Rudolf Bratschitsch, Andres Castellanos-Gomez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

We explore the use of Si3N4/Si substrates as a substitute of the standard SiO2/Si substrates employed nowadays to fabricate nanodevices based on 2D materials. We systematically study the visibility of several 2D semiconducting materials that are attracting a great deal of interest in nanoelectronics and optoelectronics: MoS2, MoSe2, WSe2 and black-phosphorus. We find that the use of Si3N4/Si substrates provides an increase of the optical contrast up to a 50%–100% and also the maximum contrast shifts towards wavelength values optimal for human eye detection, making optical identification of 2D semiconductors easier.

Original languageEnglish
Pages (from-to)847-856
Number of pages10
JournalElectronics (Switzerland)
Volume4
Issue number4
DOIs
StatePublished - 28 Oct 2015
Externally publishedYes

Keywords

  • Black phosphorus
  • Molybdenum diselenide (MoSe)
  • Molybdenum disulfide (MoS)
  • Optical identification
  • Silicon nitride substrate
  • Tungsten diselenide (WSe)
  • Two-dimensional semiconductors

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