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Ligand-mediated synthesis of colloidal Cs 2 SnI 6 three-dimensional nanocrystals and two-dimensional nanoplatelets

Ligand-mediated synthesis of colloidal Cs 2 SnI 6 three-dimensional nanocrystals and two-dimensional nanoplatelets

Yanmei Xu, Songtao Li, Zhilong Zhang, Yicong Hu, Lin Yuan, Weijian Chen, Zihan Chen, Robert Patterson, Shujuan Huang

Nanotechnology. 2019 Jul 19;30(29):295601.

PMID: 30917354

Abstract:

Cs2SnI6 is a variant on tin-iodide solution-processable materials and may lead to a lead-free material for use in next-generation photovoltaic cells and other optoelectronics. So far, only a few studies have been conducted where shape and geometry control of Cs2SnI6 nanocrystals is demonstrated. Here we report a general approach to directly synthesize Cs2SnI6 of two-dimensional (2D) layered nanoplatelets as well as three-dimensional (3D) nanocrystals. The shape of Cs2SnI6 nanocrystals could be engineered into 3D nanoparticles and different 2D nanoplatelets with well-defined morphology by choosing different organic acid and amine ligands via a hot injection process. Moreover, the thickness of layered 2D nanoplatelets could be adjusted by changing the amount of Cs-oleate present during the synthesis. The photoluminescence emission peaks changed from 643 to 742 nm based on nanomaterial shape. Our method provides a facile and versatile route to rationally control the shape of the Cs2SnI6 nanocrystals, which will create opportunities for applications in lead-free optoelectronics.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP282727213	2,6-Dimethylphenylzinc iodide solution		282727-21-3	Price
AP312692958	2,4-Dimethylphenylzinc iodide solution		312692-95-8	Price

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