Charge carrier transport in mixed dimensional quantum dot/monolayer transition metal dichalcogenide heterostructures

Mingxing Li; Sidney Bolden; Mircea Cotlet

doi:10.1117/12.2650822

15 March 2023 Charge carrier transport in mixed dimensional quantum dot/monolayer transition metal dichalcogenide heterostructures

Mingxing Li, Sidney Bolden, Mircea Cotlet

Author Affiliations +

Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2650822
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Mixed dimensional heterostructures incorporating monolayers of transition metal dichalcogenides (TMDs) and non-van Der Waals nanomaterials provide interesting physics at low dimensions and beyond that of pristine TMDs. Of particular interest are light stimulated interfacial phenomena where excitons and/or charge carriers induced in either components diffuse at the interface of the heterostructure to provide enhanced optical activity. In this work we report ultrafast carrier dynamics in mixed 0D/2D PbS QD-monolayer MoS2 by transient absorption microscopy and time-resolved confocal luminesce. We show dependency of the rate for carrier transfer with PbS QD core size which we relate to changes in bandgap alignment at interface and resulting from changes in components band overlap and provide a mechanistic view of interfacial charge transfer via ultrafast transient absorption and emission microscopy.

Conference Presentation

Citation Download Citation

Mingxing Li, Sidney Bolden, and Mircea Cotlet "Charge carrier transport in mixed dimensional quantum dot/monolayer transition metal dichalcogenide heterostructures", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2650822

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