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Issue 9, 2013
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Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS4 nanocrystal quantum dots: band-gap engineering and phonon confinement effect

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Abstract

We developed a facile hydrothermal method for synthesizing ultrafine size-controllable earth-abundant Cu2ZnSnS4 (CZTS) nanocrystals using simple Cu(II), Zn(II) and Sn(II) inorganic salts and thiourea in a mixed ethylenediamine and di-water solution as precursors. X-ray diffraction, Raman scattering and transmission electron microscopy confirm that pure kesterite structure CZTS nanocrystals have been synthesized at temperatures as low as 180 °C. Broadening of Raman peaks and blue-shift of the absorption edge is attributed to quantum confinement within the nanocrystals. The hydrophilism and tunable band-gap of the CZTS nanocrystals show the potential applications of the nanocrystals for biological labelling and quantum dot based solar cells.

Graphical abstract: Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS4 nanocrystal quantum dots: band-gap engineering and phonon confinement effect

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Publication details

The article was received on 18 Sep 2012, accepted on 08 Jan 2013 and first published on 09 Jan 2013


Article type: Paper
DOI: 10.1039/C3TA00357D
J. Mater. Chem. A, 2013,1, 3182-3186

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    Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS4 nanocrystal quantum dots: band-gap engineering and phonon confinement effect

    W. C. Liu, B. L. Guo, X. S. Wu, F. M. Zhang, C. L. Mak and K. H. Wong, J. Mater. Chem. A, 2013, 1, 3182
    DOI: 10.1039/C3TA00357D

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