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American Institute of Physics, Applied Physics Letters, 22(105), p. 223502

DOI: 10.1063/1.4902983

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

Journal article published in 2014 by John P. Mathew, Gobinath Jegannathan, Sameer Grover, Pratiksha D. Dongare ORCID, Rudheer D. Bapat, Bhagyashree A. Chalke, S. C. Purandare, Mandar M. Deshmukh ORCID
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This paper is available in a repository.

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Abstract

We study the light matter interaction in WS2 nanotube-graphene hybrid devices. Using scanning photocurrent microscopy, we find that by engineering graphene electrodes for WS2 nanotubes we can improve the collection of photogenerated carriers. We observe inhomogeneous spatial photocurrent response with an external quantum efficiency of similar to 1% at 0V bias. We show that defects play an important role and can be utilized to enhance and tune photocarrier generation. (C) 2014 AIP Publishing LLC.