Light matter interaction in WS${}_2$ nanotube-graphene hybrid devices

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.

References in corpus (10)

• Single-Layer MoS2 Phototransistors
• Field-effect tunneling transistor based on vertical graphene heterostructures
• Evolution of Electronic Structure in Atomically Thin Sheets of WS2 and WSe2
• Tunable Photoluminescence of Monolayer MoS2 via Chemical Doping
• Tuning the graphene work function by electric field effect
• Strong Photoluminescence Enhancement of MoS2 through Defect Engineering and Oxygen Bonding
• Quantitative Determination of the Band-Gap of WS2 with Ambipolar Ionic Liquid-Gated Transistors
• Band nesting and the optical response of two-dimensional semiconducting transition metal dichalcogenides
• Heterostructures produced from nanosheet-based inks
• Scanning photocurrent microscopy reveals electron-hole asymmetry in ionic liquid-gated WS2 transistors

Cited by in corpus (1)

• Directional emission from WS2 monolayer coupled to plasmonic Nanowire-on-Mirror Cavity