Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS 4 nanocrystal quantum dots: Band-gap engineering and phonon confinement effect

W. C. Liu; B. L. Guo; X. S. Wu; F. M. Zhang; Chee Leung Mak; K. H. Wong

doi:10.1039/c3ta00357d

Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS 4 nanocrystal quantum dots: Band-gap engineering and phonon confinement effect

W. C. Liu, B. L. Guo, X. S. Wu, F. M. Zhang, Chee Leung Mak, K. H. Wong

Research output: Journal article publication › Journal article › Academic research › peer-review

166 Citations (Scopus)

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.

Original language	English
Pages (from-to)	3182-3186
Number of pages	5
Journal	Journal of Materials Chemistry A
Volume	1
Issue number	9
DOIs	https://doi.org/10.1039/c3ta00357d
Publication status	Published - 7 Mar 2013

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c3ta00357d

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AU - Liu, W. C.

AU - Guo, B. L.

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AU - Mak, Chee Leung

AU - Wong, K. H.

PY - 2013/3/7

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AB - 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.

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Facile hydrothermal synthesis of hydrotropic Cu2ZnSnS 4 nanocrystal quantum dots: Band-gap engineering and phonon confinement effect

Abstract

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UN SDGs

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