Hybrid nanostructures constructed from semiconductor quantum dots (QDs, or 0D nanomaterials) and layered transition metal dichalcogenides (TMDs, or 2D materials) have risen as superior hybrid nanostructures when utilized in optoelectronic applications due to their mixed functionality, enhanced sensitivity, and band-gap tunability. Here, we have demonstrated interfacial electron transfer in core/shell PbS/CdS QDs and layered 2D-MoS2 hybrids by laser-induced time-resolved photoluminescence (PL) and photocurrent imaging measurements. The tunability of electron transfer rate can be achieved following band-gap engineering of (i) MoS2 flake thickness throughout a series of hybrids with varying number of layers from monolayer to bulk, and (ii) by band-gap engineering of PbS/CdS QDs via changing QDs core size. We provide the mechanistic picture of electron transfer between a point donor (QD) and a surface acceptor (2D-MoS2), derived from Marcus’s theory for nonadiabatic electron transfer in weakly coupled systems and we show that this model fits rather well our experimental data of layer-dependent electron transfer. Our results provide a guideline for designing QD−TMD charge-transfer hybrid devices and indicate that a well-performing hybrid in terms of electron transfer will have a core-only donor PbS QD of smallest possible size achievable through colloidal synthesis and a few layers MoS2 absorption counterpart.

Layer-dependent photoinduced electron transfer in 0D−2D PbS/CdS−layered MoS2 hybrids

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.