Synthesis and Characterization of Cu2ZnSnS4 (CZTS) Powders by Solvothermal Method

doi:10.3724/SP.J.1077.20143.13418

Journal of Inorganic Materials ›› 2014, Vol. 29 ›› Issue (5): 487-492.DOI: 10.3724/SP.J.1077.20143.13418

• Research Paper • Previous Articles Next Articles

Synthesis and Characterization of Cu₂ZnSnS₄ (CZTS) Powders by Solvothermal Method

ZHOU Chao, FENG Qing, GAO Yan-Min

(School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

Received:2013-08-13 Revised:2013-10-16 Published:2014-05-20 Online:2014-04-24
About author:ZHOU Chao. E-mail: chaozhou0721@126.com
Supported by:
National Natural Science Foundation of China (51075197); Graduate Student Innovation Program of Jiangsu University of Science and Technology(YCX11S-24)

Abstract

Abstract: Cu₂ZnSnS₄(CZTS) powderss were synthesized by a facile solvothermal method in ethylene glycol with the presense of polyvinylpyrrolidone(PVP), using CuCl₂·2H₂O, Zn(Ac)₂·2H₂O and SnCl₄·5H₂O as metal precursor, thiourea as sulfur source. The effects of reaction temperature and time on crystal structure, composition, morphology and absorption spectra of CZTS powders were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), Raman spectroscope, transmission electron microscope (TEM), energy dispersive X-ray spectroscope (EDS) and UV-Vis spectroscope. The results reveal that the reaction temperature and reaction time have a certain influence on the morphology and optical properties of the as-synthesized CZTS powders. The optimum solvothermal reaction condition is 230℃, 24 h. Under this condition, crystallization of the synthesized CZTS powders is pure and complete, and the particles are uniform and monodispersed sheets-contanimg microspheres. Elements’ atomic ratio of CZTS powder is close to stoichiometric coefficient and band gap of the products is about 1.52 eV, which is close to the optimum value for solar photoelectric conversion. In addition, a possible reaction mechanism of CZTS particle preparation is also inferred.

Key words: Cu₂ZnSnS₄, solvothermal method, reaction time, reaction temperature

CLC Number:

TM651

ZHOU Chao, FENG Qing, GAO Yan-Min. Synthesis and Characterization of Cu₂ZnSnS₄ (CZTS) Powders by Solvothermal Method[J]. Journal of Inorganic Materials, 2014, 29(5): 487-492.

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Synthesis and Characterization of Cu₂ZnSnS₄ (CZTS) Powders by Solvothermal Method

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