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Optoelectronic properties of graphene-MoS2 hybrid

Published online by Cambridge University Press:  10 April 2013

Medini Padmanabhan ,
Kallol Roy ,
Srijit Goswami ,
T. Phanindra Sai ,
Gopalakrishnan Ramalingam ,
Sanjeev Kaushal ,
Srinivasan Raghavan  and
Arindam Ghosh
Medini Padmanabhan
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore, India 560012
Kallol Roy
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore, India 560012
Srijit Goswami
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore, India 560012
T. Phanindra Sai
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore, India 560012
Gopalakrishnan Ramalingam
Affiliation:
Materials Research Center, Indian Institute of Science, Bangalore, India 560012
Sanjeev Kaushal
Affiliation:
Tokyo Electron Ltd., Akasaka Biz Tower, 3-1 Akasaka 5-Chome, Minato-ku, Tokyo, Japan, 107-6325
Srinivasan Raghavan
Affiliation:
Materials Research Center, Indian Institute of Science, Bangalore, India 560012
Arindam Ghosh
Affiliation:
Department of Physics, Indian Institute of Science, Bangalore, India 560012
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Abstract

Ultra-thin flakes of layered materials have recently been attracting widespread research interest due to their exotic properties. In this work, we study the optoelectronic response of a hybrid of two such materials – graphene and MoS2. Our devices consist of mechanically exfoliated graphene flakes transferred on top of similarly exfoliated MoS2. The electrical response of the hybrid is studied in the presence of white light. We show that the four-point resistance of graphene is modulated in the presence of light. This effect is observed to be a strong function of gate voltage. We have also extended our studies to CVD (chemical vapor deposition) - grown graphene transferred onto MoS2 which show qualitatively similar features, thereby attesting to the scalability of the device architecture.

Keywords

devicesphotoconductivitylayered
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1505: Symposium W – Carbon Nanomaterials , 2013 , mrsf12-1505-w07-64
Copyright
Copyright © Materials Research Society 2013

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