期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 133, 期 2-3, 页码 688-691出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.01.057
关键词
Nanostructures; Annealing; Electron microscopy (TEM and SEM); X-ray photo-emission spectroscopy (XPS)
资金
- National Basic Research Program of China [2012CB934300]
- National Nature Science Foundation of China [61006089]
- Shanghai City Committee of Science and Technology [11ZR1412700]
- Shanghai University
- NSF of China [61106087, 11004211]
- Shanghai Fundamental Research Funds for the Central Universities [10ZR 1408800]
Cu2FeSnS4 nanocrystals were cost-effectively synthesized by thermal reactions of metal salts and sulfur in a hot oleylamine solution. Stannite structured Cu2FeSnS4 nanocrystals with diameters of about 15-25 nm were obtained, analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The morphology of the continuous Cu2FeSnS4 thin films was characterized by scanning electron microscopy (SEM) and the average compositions of the nanocrystals were determined by energy dispersive X-ray analysis (EDX). High-resolution X-ray photoemission spectroscopy (XPS) analysis of the four constituent elements indicated Cu (I), Fe (II), Sn (IV) and sulfide ions. The band gap of as-synthesised Cu2FeSnS4 nanocrystals is about 1.33 eV determined by the UV-vis-NIR absorption spectra measurement, which indicates its possible solar cell applications. (C) 2012 Elsevier B.V. All rights reserved.
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