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Carrier Dynamics in SnS2 Single Crystals and Vertical Nanostructures: Role of Edges

This study explores how nanostructuring SnS 2 in the form of vertically-aligned nanoflakes to increase the surface area impacts the lifetime and microscopic conductivity of photoinjected carriers compared to the bulk SnS 2 .

Published onDec 18, 2019
Carrier Dynamics in SnS2 Single Crystals and Vertical Nanostructures: Role of Edges
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Abstract

SnS 2 is a member of the van der Waals 2D layered materials family. Its moderate bandgap, environmental stability and high carrier mobility makes it attractive for solar energy conversion application. We explore how nanostructuring SnS 2 in the form of vertically-aligned nanoflakes to increase the surface area impacts the lifetime and microscopic conductivity of photoinjected carriers compared to the bulk SnS 2 . Increased surface area and the presence of edges is beneficial to the efficiency of SnS 2 photoanode performance but it comes at a cost of increased carrier trapping at surface and edge states.

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Kushnir, K., Morissette, E., Giri, B., Doiron, C. W., Grimm, R. L., Rao, P. M., & Titova, L. V. (2018). Carrier dynamics in sns2 single crystals and vertical nanostructures: Role of edges. 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 1–2. https://doi.org/10.1109/IRMMW-THz.2018.8509909

*denotes a WPI undergraduate student author

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