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Issue 27, 2014
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Rapid facile synthesis of Cu2ZnSnS4 nanocrystals

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Cu2ZnSnS4 (CZTS) nanocrystals were synthesized via thermolysis of single-source cation and sulfur precursors copper, zinc and tin diethyldithiocarbamates. The average nanocrystal size could be tuned between 2 nm and 40 nm, by varying the synthesis temperature between 150 °C and 340 °C. The synthesis is rapid and is completed in less than 10 minutes. Characterization by X-ray diffraction, Raman spectroscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy confirm that the nanocrystals are nominally stoichiometric kesterite CZTS. The ∼2 nm nanocrystals synthesized at 150 °C exhibit quantum confinement, with a band gap of 1.67 eV. Larger nanocrystals have the expected bulk CZTS band gap of 1.5 eV. Several micron thick films deposited by drop casting colloidal dispersions of ∼40 nm CZTS nanocrystals were crack-free, while those cast using 5 nm nanocrystals had micron-scale cracks.

Graphical abstract: Rapid facile synthesis of Cu2ZnSnS4 nanocrystals

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The article was received on 05 Apr 2014, accepted on 02 May 2014 and first published on 02 May 2014

Article type: Paper
DOI: 10.1039/C4TA01658K
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Citation: J. Mater. Chem. A, 2014,2, 10389-10395
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    Rapid facile synthesis of Cu2ZnSnS4 nanocrystals

    B. D. Chernomordik, A. E. Béland, N. D. Trejo, A. A. Gunawan, D. D. Deng, K. A. Mkhoyan and E. S. Aydil, J. Mater. Chem. A, 2014, 2, 10389
    DOI: 10.1039/C4TA01658K

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