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Erschienen in:
01.03.2015
Influence of solution temperature on the properties of Cu2ZnSnS4 nanoparticles by ultrasound-assisted microwave irradiation
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 3/2015
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Abstract
In this paper, Cu2ZnSnS4 (CZTS) nanoparticles were synthesized by applying ultrasound and microwave irradiation simultaneously. The effects of solution temperature on properties of CZTS nanoparticles were studied by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), and UV–vis spectroscopy. The results showed that as-synthesized CZTS nanoparticles had a single phase and stoichiometric composition, when solution temperature was kept at 180 °C. However, when solution temperature was low, the as-prepared nanoparticles contained Cu2−xS, Cu2SnS3 and ZnS secondary phases according to the results of XRD and Raman spectroscopy. Furthermore, TEM showed that the rod-like and hexagonal plate-like nanoparticles formed at low solution temperature. The crystallinity of as-prepared nanoparticles increased with the increasing solution temperature. Moreover, the band gap of CZTS nanoparticles obtained at 180 °C was 1.58 eV, and that obtained at low temperature was large due to secondary phases.