Photovoltaics in Van der Waals Heterostructures

The peculiar nature of light-matter interaction in atomically thin transition metal dichalcogenides is recently under examination for application in novel optoelectronic devices. Here, we show that heterostructures composed of two or more such layers can be used for solar energy harvesting. The stro...

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Bibliographic Details
Published in:IEEE journal of selected topics in quantum electronics 2017-01, Vol.23 (1), p.106-116
Main Authors: Furchi, Marco M., Zechmeister, Armin A., Hoeller, Florian, Wachter, Stefan, Pospischil, Andreas, Mueller, Thomas
Format: Article
Language:English
Subjects:
Atomic layer deposition
excitonic solar cells
Excitons
MoS2
MoSe2
Optical device fabrication
Photonic band gap
Photovoltaic cells
Photovoltaic systems
TMDs
van der Waals heterostructures
WSe2
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Summary:The peculiar nature of light-matter interaction in atomically thin transition metal dichalcogenides is recently under examination for application in novel optoelectronic devices. Here, we show that heterostructures composed of two or more such layers can be used for solar energy harvesting. The strong absorption in these atomically thin layers makes it possible to achieve an efficient power conversion with a minimal amount of active material. We describe in detail two different fabrication techniques that allow to realize heterostructures with clean, atomically sharp interfaces. The observed electrical and photovoltaic properties are analyzed. Our findings suggest that, accompanied by the advances in large area fabrication of atomically thin transition metal dichalcogenides, van der Waals heterostructures are promising candidates for a new generation of excitonic solar cells.
ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2016.2582318