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arXiv · 1412.1566

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
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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.

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John P. Mathew, Gobinath Jegannathan, Sameer Grover, Pratiksha D. Dongare, Rudheer D. Bapat, Bhagyashree A. Chalke, S. C. Purandare, Mandar M. Deshmukh. 2014-12-04. Light matter interaction in WS$_{2}$ nanotube-graphene hybrid devices. https://doi.org/10.1063/1.4902983

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