Quaternary two-dimensional (2D) transition metal dichalcogenides (TMDs) with tunable bandgap

Sandhya Susarla; Alex Kutana; Jordan A. Hachtel; Vidya Kochat; Amey Apte; Robert Vajtai; Juan Carlos Idrobo; Boris I. Yakobson; Chandra Sekhar Tiwary; Pulickel M Ajayan

Quaternary two-dimensional (2D) transition metal dichalcogenides (TMDs) with tunable bandgap

Materials Science 2017-05-04 v1

Authors: Sandhya Susarla , Alex Kutana , Jordan A. Hachtel , Vidya Kochat , Amey Apte , Robert Vajtai , Juan Carlos Idrobo , Boris I. Yakobson , Chandra Sekhar Tiwary , Pulickel M Ajayan

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Abstract

Alloying/doping in two-dimensional material has been important due to wide range band gap tunability. Increasing the number of components would increase the degree of freedom which can provide more flexibility in tuning the band gap and also reduced the growth temperature. Here, we report synthesis of quaternary alloys MoxW1-xS2ySe2(1-y) using chemical vapour deposition. The composition of alloys has been tuned by changing the growth temperatures. As a result, we can tune the bandgap which varies from 1.73 eV to 1.84 eV. The detailed theoretical calculation supports the experimental observation and shows a possibility of wide tunability of bandgap.

Keywords

quaternary alloy two-dimensional material transition metal dichalcogenide tunable bandgap chemical vapor deposition composition tuning theoretical calculation

Cite

@article{arxiv.1705.01245,
  title  = {Quaternary two-dimensional (2D) transition metal dichalcogenides (TMDs) with tunable bandgap},
  author = {Sandhya Susarla and Alex Kutana and Jordan A. Hachtel and Vidya Kochat and Amey Apte and Robert Vajtai and Juan Carlos Idrobo and Boris I. Yakobson and Chandra Sekhar Tiwary and Pulickel M Ajayan},
  journal= {arXiv preprint arXiv:1705.01245},
  year   = {2017}
}

Quaternary two-dimensional (2D) transition metal dichalcogenides (TMDs) with tunable bandgap

Abstract

Keywords

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