Light matter interaction in WS$_{2}$ nanotube-graphene hybrid devices

John P. Mathew; Gobinath Jegannathan; Sameer Grover; Pratiksha D. Dongare; Rudheer D. Bapat; Bhagyashree A. Chalke; S. C. Purandare; Mandar M. Deshmukh

doi:10.1063/1.4902983

Light matter interaction in WS$_{2}$ nanotube-graphene hybrid devices

Mesoscale and Nanoscale Physics 2014-12-05 v1

Authors: John P. Mathew , Gobinath Jegannathan , Sameer Grover , Pratiksha D. Dongare , Rudheer D. Bapat , Bhagyashree A. Chalke , S. C. Purandare , Mandar M. Deshmukh

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Abstract

We study the light matter interaction in WS $_{2}$ nanotube-graphene hybrid devices. Using scanning photocurrent microscopy we find that by engineering graphene electrodes for WS $_{2}$ nanotubes we can improve the collection of photogenerated carriers. We observe inhomogeneous spatial photocurrent response with an external quantum efficiency of $\sim 1\%$ at 0 V bias. We show that defects play an important role and can be utilized to enhance and tune photocarrier generation.

Keywords

light matter interaction WS$_{2}$ nanotubes graphene hybrid devices scanning photocurrent microscopy photogenerated carriers external quantum efficiency defects

Cite

@article{arxiv.1412.1566,
  title  = {Light matter interaction in WS$_{2}$ nanotube-graphene hybrid devices},
  author = {John P. Mathew and Gobinath Jegannathan and Sameer Grover and Pratiksha D. Dongare and Rudheer D. Bapat and Bhagyashree A. Chalke and S. C. Purandare and Mandar M. Deshmukh},
  journal= {arXiv preprint arXiv:1412.1566},
  year   = {2014}
}

Light matter interaction in WS$_{2}$ nanotube-graphene hybrid devices

Abstract

Keywords

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