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Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses

Lookup NU author(s): Dr Aleksey KozikovORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


The recent discovery of semiconducting two-dimensional materials is predicted to lead to the introduction of a series of revolutionary optoelectronic components that are just a few atoms thick. Key remaining challenges for producing practical devices from these materials lie in improving the coupling of light into and out of single atomic layers, and in making these layers robust to the influence of their surrounding environment. We present a solution to tackle both of these problems simultaneously, by deterministically placing an epoxy based micro-lens directly onto the materials'surface. We show that this approach enhances the photoluminescence of tungsten diselenide (WSe2) monolayers by up to 300%, and nearly doubles the imaging resolution of the system. Furthermore, this solution fully encapsulates the monolayer, preventing it from physical damage and degradation in air. The optical solution we have developed could become a key enabling technology for the mass production of ultra-thin optical devices, such as quantum light emitting diodes.

Publication metadata

Author(s): Woodhead CS, Roberts J, Noori YJ, Cao Y, Bernardo-Gavito R, Tovee P, Kozikov A, Novoselov K, Young RJ

Publication type: Article

Publication status: Published

Journal: 2D Materials

Year: 2017

Volume: 4

Issue: 1

Print publication date: 01/03/2017

Online publication date: 07/12/2016

Acceptance date: 11/11/2016

Date deposited: 19/06/2020

ISSN (electronic): 2053-1583

Publisher: Institute of Physics Publishing Ltd.


DOI: 10.1088/2053-1583/4/1/015032


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