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  • 1607.05025

    Submitted manuscript, 974 KB, PDF document

  • Direct_light_extraction_from_2D_materials_using_liquid_formed_micro_lenses_XII

    Rights statement: 12m

    Accepted author manuscript, 1.07 MB, PDF document

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  • Woodhead_2017_2D_Mater._4_015032

    Final published version, 1.99 MB, PDF document

    Available under license: CC BY


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

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Article number015032
<mark>Journal publication date</mark>7/12/2016
<mark>Journal</mark>2D Materials
Issue number1
Number of pages8
Publication StatusPublished
<mark>Original language</mark>English


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.