SnS Nanoplatelets for Solar Cells

SnS Nanoplatelets for Solar Cells

Author: Veronika Belusa

Tin sulfide nanoparticles have gained interest as a material for use in electrochemical energy storage, thermoelectrics, and solar energy conversion such as photovoltaics and photocatalysis. For these applications it is necessary to precisely control their size, shape, composition, and crystalline phase. 

Antoine de Kergommeaux, Peter Reiss, University Grenoble Alpes, France, and colleagues from France have developed a synthesis of well-calibrated monodisperse square SnS nanoplatelets. These monodisperse nanoplatelets can be precisely produced with a thickness in the range of 4–15 nm and an edge length in the range of 15–100 nm, respectively. Sn tetrachloride pentahydrate, trioctylphosphine, and oleic acid react with thioacetamide to the intermediate tetrachlorotin-oleate from which complex polyhedral seed nanoparticles are formed. Controlled assembly of these lead to the nanoplatelets.

The SnS nanoplatelets crystallize in the α-SnS orthorhombic herzenbergite structure (space group Pnma) and show ordered Sn vacancy rich (100) planes.


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