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首页> 外文期刊>International Journal of Electrochemical Science >Single Phase FeS2 (pyrite) Thin Films Prepared by Combined Electrodeposition and Hydrothermal Low Temperature Techniques
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Single Phase FeS2 (pyrite) Thin Films Prepared by Combined Electrodeposition and Hydrothermal Low Temperature Techniques

机译：电沉积与水热低温技术联合制备单相FeS 2 （黄铁矿）薄膜

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In current work the synthesis of single phase of FeS2 (pyrite) thin films from a combinedelectrochemical and hydrothermal techniques and without the need for a post sulfurization process isreported. Electrodeposition has been carried out in a non aqueous based electrolytic bath (diethyleneglycol (DEG)). Voltamperometric measurements were conducted to study the electrochemicalresponse of the precursors in this organic DEG solvent. These experiences allowed determining thebest experimental conditions in DEG for obtaining the FeS/FeS2 mixture phases which were obtainedapplying a constant potential of .10V. The hydrothermal technique that was developed in amicrowave oven improved stoichiometry and crystallinity of the deposits obtained by electrodepositionand led to obtaining a single pyrite phase. SEM micrographs exhibited complete substrate coveragewhereas EDS analysis gave atomic ratio S/Fe very close to 2. XRD analysis of the final thin filmshows that the deposit has a cubic structure without the presence of other undesired phases. However,Raman spectra indicate a later formation of amorphous superficial hematite. The optical measurementsshow an optical direct bandgap of 0.985 eV. Results open the possibility of applying the procedure tothe formation of a thin film of FeS2 of good structural and optical characteristics that can be employedas an absorber material in solar cells.
机译：在当前的工作中，报告了由电化学和水热技术相结合而无需后硫化过程的单相FeS2（黄铁矿）薄膜的合成。电沉积已在非水基电解浴（二甘醇（DEG））中进行。进行伏安法测量以研究前体在这种有机DEG溶剂中的电化学响应。这些经验可以确定DEG中获得FeS / FeS2混合相的最佳实验条件，这些相是在恒定电压为.10V的条件下获得的。在微波炉中开发的水热技术改善了通过电沉积获得的沉积物的化学计量和结晶度，并导致获得了一个黄铁矿相。 SEM显微照片显示出完全的基底覆盖，而EDS分析给出的原子比S / Fe非常接近2。最终薄膜的XRD分析显示该沉积物具有立方结构，而没有其他不希望的相。然而，拉曼光谱表明后来形成了无定形的表面赤铁矿。光学测量结果显示，光学直接带隙为0.985 eV。结果打开了将该方法应用于具有良好结构和光学特性的FeS 2薄膜的形成的可能性，该FeS 2薄膜可用作太阳能电池中的吸收材料。

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