Preparation and Characterization of Cu2ZnSnS4 Nanoparticles and Films

doi:10.3724/SP.J.1077.2012.00079

Abstract

Abstract:

Cu₂ZnSnS₄ (CZTS) semiconductor is a promising materials for thin film solar cells. Cu₂ZnSnS₄(CZTS) nanoparticles were prepared via a hot-injection processing under high-purity N₂ atmosphere, using Cu(acac)₂, Zn(OAc)₂, SnCl₂•2H₂O, sulfur powder as the precursors, oleylamine (OLA) as the solvent and the capping molecules. The CZTS thin films were deposited on glass substrates by drop-casting from the Sol of CZTS nanocrystals in toluene. The influence of reaction temperature on the phase structure and morphology of nanoparticles was studied. The samples were investigated by powder X-ray diffraction (XRD), Raman spectroscope, transmission electron microscope (TEM), scanning electron microscope (SEM) and UV-Vis-NIR spectroscope. The results indicated that the CZTS nanoparticles with 10 nm in size, good dispersion and an optical band gap of 1.5 eV was synthesized under the optimum reaction temperature of 260℃.

Key words: hot-injection, Cu₂ZnSnS₄, nanoparticles, thin film, solar cells

CLC Number:

O742

LUO Peng, ZHAO Li-Xia, XU Jian. Preparation and Characterization of Cu₂ZnSnS₄ Nanoparticles and Films[J]. Journal of Inorganic Materials, 2012, 27(1): 79-82.

Figures/Tables 5

Fig. 1 XRD patterns of CZTS nanoparticles reacted at different temperatures

Fig. 2 Raman spectra of CZTS nanocrystals

Fig. 3 TEM images of CZTS nanocrystals reacted at different temperatures

Fig. 4 (a) SEM image and (b) EDS pattern of CZTS thin-film

Fig. 5 UV-Vis absorption spectra of CZTS nanocrystals reacted at different temperatures Inset shows an obtained band gap of 1.5eV

References 18

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Preparation and Characterization of Cu₂ZnSnS₄ Nanoparticles and Films

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