Type

Journal Article

Authors

Georg Duesberg
David Mc Closkey
Niall Mc Evoy
Louise Bradley

Subjects

Physics

Topics
devices photocurrent wavelength mos2 2d materials emission energy transfer quantum dots

Dependence of Photocurrent Enhancements in Hybrid Quantum Dot-MoS2 Devices on Quantum Dot Emission Wavelength (2019)

Abstract The spectral dependence of nonradiative energy transfer (NRET) from three spectrally different quantum dot (QD) ensembles to monolayer MoS2 is reported. The QDs with peak emission wavelengths of 450, 530, and 630 nm induce large photocurrent enhancements in the hybrid devices with monolayer MoS2 islands grown by chemical vapor deposition (CVD). NRET efficiencies of over 90% are observed for each of the QD-MoS2 hybrids, with 3-fold to 6-fold photocurrent enhancements, depending on the spectral overlap between the QDs and the monolayer MoS2. We find good agreement between the trends obtained from the NRET rate and the spectral overlap function showing evidence for a Förster-like energy transfer mechanism in these CdSeS/ZnS QD-MoS2 devices.
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Full list of authors on original publication

Georg Duesberg, David Mc Closkey, Niall Mc Evoy, Louise Bradley

Experts in our system

1
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
2
David Mc Closkey
Trinity College Dublin
Total Publications: 8
 
3
Niall Mc Evoy
Trinity College Dublin
Total Publications: 20
 
4
Louise Bradley
Trinity College Dublin
Total Publications: 120