Quaternery two dimensional transiton metal dichalcogenide alloys

ORAL

Abstract

Monolayers of 2D TMDs, due to their unique band gap are useful in various optoelectronic devices. Alloying in 2D TMDs has gained importance due to its band gap tunability. However this tunability could futher be improved by increasing number of components, which provides more flexibility and degress of freedom. In the present work, quaternary alloys (MoxW1-xS2ySe2(1-y)) (0< x,y <1) have been synthesised using CVD. The composition of the alloy has been tuned by changing the growth temperature, resulting in wide band gap tunability from 1.6 to 1.85 eV. Detailed DFT calcaulations support the experimental data. This wide range of band gap tunability would open the doors for 2D TMDs to be used in applications like laser diodes and LEDs.

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Presenters

  • Sandhya Susarla

    Materials Science & NanoEngineering, Rice University, MSNE, Rice Univ

Authors

  • Sandhya Susarla

    Materials Science & NanoEngineering, Rice University, MSNE, Rice Univ

  • Alex Kutana

    MSNE, Rice Univ

  • Jordan Hachtel

    Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Center for Nanophase Materials

  • Vidya Kochat

    Materials Science & NanoEngineering, Rice University, MSNE, Rice Univ

  • Amey Apte

    MSNE, Rice Univ, Rice University

  • Robert Vajtai

    MSNE, Rice Univ, Department of Materials Science and Nano Engineering, Rice University

  • Juan Carlos Idrobo

    Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Center for Nanophase Materials

  • Boris Yakobson

    MSNE, Rice Univ

  • Chandra Sekhar Tiwary

    Materials Science & NanoEngineering, Rice University, MSNE, Rice Univ

  • Pulickel Ajayan

    Materials Science & NanoEngineering, Rice University, MSNE, Rice Univ, Department of Materials Science and Nano Engineering, Rice University, Department of Materials Science and Nanoengineering, Rice university, Rice University