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Chinese Journal of Materials Research  2016, Vol. 30 Issue (11): 861-867    DOI: 10.11901/1005.3093.2016.134
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Effect of Solubility Parameter of Alcohols Solvents on Performance of Cu2ZnSnS4 Particles
Shixu JIANG1,Chao ZHOU2,Tiancai ZHANG2,Yanmin GAO1,*
1. Jiangsu Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China
2. Shanghai Shipbuilding Technology Research Institute, Shanghai, 200032, China
Cite this article: 

Shixu JIANG, Chao ZHOU, Tiancai ZHANG, Yanmin GAO. Effect of Solubility Parameter of Alcohols Solvents on Performance of Cu2ZnSnS4 Particles. Chinese Journal of Materials Research, 2016, 30(11): 861-867.

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Abstract  

Cu2ZnSnS4 (CZTS) particles were synthesized by a facile solvothermal method in polyvinylpyrrolidone (PVP) containing alcohols solvent, with CuCl22H2O, Zn(Ac)22H2O and SnCl45H2O as metal precursor, and thiourea as sulfur source, respectively. The effect of the variation of solubility parameter of alcohols solvents on crystal structure, composition, morphology and absorption spectra of the synthesized CZTS particles were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, transmission electron microscopy (TEM) with energy dispersive X-ray spectroscopy(EDS), UV-Vis spectroscopy and electrochemical analyzer. The results reveal that the solubility parameter of alcohols solvent has a certain influence on the crystallization, morphology, atomic ratios and photoelectric properties of the as-synthesized CZTS particles. The optimum alcohols solvent is ethylene glycol.The crystallization of CZTS particles synthesized under the above condition is pure and complete, and the CZTS particles with flaky facets are uniform and mono-dispersed. The atomic ratio of elements for CZTS particles is close to stoichiometric coefficient and the band gap of the products is about 1.47 eV, which is close to the optimum value for solar photoelectric conversion. The resistivity of CZTS is 45.86 Ωm.

Key words:  synthesizing and processing techniques for materials      solvothermal method      solubility parameter      alcohols solvent      CZTS     
Received:  14 March 2016     

URL: 

https://www.cjmr.org/EN/10.11901/1005.3093.2016.134     OR     https://www.cjmr.org/EN/Y2016/V30/I11/861

Fig.1  XRD patterns of CZTS particles obtained in different solubility parameter of alcohol solvents
Fig.2  Raman spectra of CZTS particles obtained in different solubility parameter of alcohol solvents
Fig.3  SEM images of the CZTS particles prepared in different solubility parameter of alcohol solvent, (a) ethylene glycol; (b) diethylene glycol; (c) triethylene glycol
Fig.4  TEM images of the CZTS particles prepared in alcohol solvent with different solubility. (a) ethylene glycol; (b) diethylene glycol; (c) triethylene glycol
Sample Cu/% Zn/% Sn/% S/% Cu/Zn/Sn/S
EG 21.12 14.63 12.83 51.42 1.7/1.2/1/4
DEG 21.74 11.71 14.63 51.92 1.9/1/1.2/4.4
TEG 24.48 11.41 12.59 51.52 2.1/1/1.1/4.5
Table 1  The atomic ratio of CZTS particles prepared in different solubilityparameter of alcohol solvents
Fig.5  The atomic ratio of CZTS particles trend chart prepared in different solubilityparameter of alcohol solvents
Fig.6  UV-Vis spectra of CZTS particles
Fig.7  Current-potential (I-V) curve of the CZTS film tested in the darkness and under illumination
Fig.8  The relationship between alcohol solvents solubility parameter and CZTS particles resistivity
Sample Preparation
condition
Film area
/cm2
Thickness
/cm
Resistivity
/Ωm
CZTS-1 EG 0.368 0.13 45.86
CZTS-2 DEG 0.323 0.15 50.79
CZTS-3 TEG 0.472 0.12 71.26
Table 2  Resistivity of CZTS particles prepared in different solubility parameter of alcohol solvents
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