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

Woodhead, Christopher and Roberts, Jonny and Noori, Yasir and Cao, Yameng and Bernardo Gavito, Ramon and Tovee, Peter David and Kozikov, Aleksey and Novoselov, K. S. and Young, Robert James (2016) Increasing the light extraction and longevity of TMDC monolayers using liquid formed micro-lenses. 2D Materials, 4 (1). ISSN 2053-1583

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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.

Item Type: Journal Article
Journal or Publication Title: 2D Materials
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/2200/2210
Departments: Faculty of Science and Technology > Physics
ID Code: 80453
Deposited By: ep_importer_pure
Deposited On: 21 Jul 2016 15:32
Refereed?: Yes
Published?: Published
Last Modified: 13 Nov 2019 06:53

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