硫化还原铁薄膜制备FeS_2薄膜

PYRITE FILMS SYNTHESIZED BY SULFIDATION OF REDUCED IRON FILMS

在乙酰丙酮络合FeCl_3的乙醇溶液与环氧氯乙烷反应生成的溶胶中,使用提拉法在玻璃基体上制备氧化铁薄膜,在氢气气氛中,450℃条件下氧化铁薄膜还原为Fe,再把Fe与S密封于石英玻璃管中,并在250～430℃温度范围内进行热处理,使Fe薄膜转化为硫化铁薄膜。应用XRD衍射仪、扫描电子显微镜、能谱仪及分光光度计对薄膜进行了研究。结果表明,薄膜在370℃温度硫化后,薄膜呈良好的黄铁矿结构,晶粒粒径约150nm,此时合成黄铁矿薄膜的禁带宽度为1.19eV。

Iron oxide films were deposited on glass surfaces using a sol-gel of both acetyl acetone and ferric chloride dissolved in ethanol reacted with chlorepoxy by dip-coating techniques. The iron oxide films were reduced to iron films by annealing in hydrogen at 450℃, and then the iron films were converted to pyrite films in gaseous sulfur in sealed ampules. These films were studied using X-ray diffractometry （XRD）, Scanning electron microscope, EDX and spectrophotometer. The results show that the prepared films posses good crystallinity of pyrite with grain size about 150nm while sulfurated at 370℃, and the bandgap of that film is 1.19eV.