Effect of S:Fe Molar Ratios on the Direct Formation of Nanocrystalline Pyrite FeS<sub>2</sub> Thin Films by Chemical Spray Pyrolysis under a Low Substrate Temperature (&lt; 300 °C) for Biosensor

Bo Ci Cheng,Jen Bin Shi,Cheng Han Wu, Kuan Ping Chen,Po Feng Wu,Hsuan Wei Lee,Hsien Sheng Lin, Fu Chou Cheng

Materials Science Forum（2018）

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摘要

The FeS2films were deposited by using the spray pyrolysis method using mixed aqueous solutions of CH4N2S and FeCl3, with different S:Fe molar ratios. The homogeneous FeS2nanocrystalline films with good crystallinity were synthesized. The structure, composition, and properties of these films were very sensitive to the S:Fe molar ratios. The direct transition of the pyrite FeS2films were about 0.9 - 1.25 eV. High absorption coefficients and suitable band gaps were observed. FeS2thin films were synthesized for new biomaterial applications such as glucose.

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nanocrystalline pyrite fes<sub>2</sub>,chemical spray pyrolysis

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Effect of S:Fe Molar Ratios on the Direct Formation of Nanocrystalline Pyrite FeS&lt;sub&gt;2&lt;/sub&gt; Thin Films by Chemical Spray Pyrolysis under a Low Substrate Temperature (&amp;lt; 300 °C) for Biosensor

Effect of S:Fe Molar Ratios on the Direct Formation of Nanocrystalline Pyrite FeS<sub>2</sub> Thin Films by Chemical Spray Pyrolysis under a Low Substrate Temperature (< 300 °C) for Biosensor