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arXiv · 1608.05239

Scalable synthesis of WS2 on graphene and h-BN: an all-2D platform for light-matter transduction

Antonio Rossi·Holger Buech·Carmine Di Rienzo·Vaidotas Miseikis·Domenica Convertino·Ameer Al-Temimy·Valerio Voliani·Mauro Gemmi·Vincenzo Piazza·Camilla Coletti
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Abstract

By exhibiting a measurable bandgap and exotic valley physics, atomically-thick tungsten disulfide (WS2) offers exciting prospects for optoelectronic applications. The synthesis of continuous WS2 films on other two-dimensional (2D) materials would greatly facilitate the implementation of novel all-2D photoactive devices. In this work we demonstrate the scalable growth of WS2 on graphene and hexagonal boron nitride (h-BN) via a chemical vapor deposition (CVD) approach. Spectroscopic and microscopic analysis reveal that the film is bilayer-thick, with local monolayer inclusions. Photoluminescence measurements show a remarkable conservation of polarization at room temperature peaking 74% for the entire WS2 film. Furthermore, we present a scalable bottom-up approach for the design of photoconductive and photoemitting patterns.

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Antonio Rossi, Holger Buech, Carmine Di Rienzo, Vaidotas Miseikis, Domenica Convertino, Ameer Al-Temimy, Valerio Voliani, Mauro Gemmi, Vincenzo Piazza, Camilla Coletti. 2016-08-18. Scalable synthesis of WS2 on graphene and h-BN: an all-2D platform for light-matter transduction. https://doi.org/10.1088/2053-1583%2F3%2F3%2F031013

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