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 publicationJournal articleAcademic researchpeer-review

116 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 languageEnglish
Pages (from-to)3182-3186
Number of pages5
JournalJournal of Materials Chemistry A
Volume1
Issue number9
DOIs
Publication statusPublished - 7 Mar 2013

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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