Bandgap Tuning of ZrO2-SnO2 Nanocomposite thin Films by Sol-gel Dip Coating Technique☆
Bandgap Tuning of ZrO2-SnO2 Nanocomposite thin Films by Sol-gel Dip Coating Technique☆
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DOI：
10.1016/j.matpr.2015.06.031
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
V. Anitha;S. Lekshmy;K. Joy
中科院分区：
文献类型：
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作者：
V. Anitha;S. Lekshmy;K. Joy
采用溶胶-凝胶浸渍法制备了ZrO 2/SnO 2摩尔比分别为0.1/0.3（13）、0.1/0.2（12）、0.2/0.1（121）和0.3/0.1（131）的透明纳米复合ZrO 2-SnO 2薄膜。所有样品的X射线衍射谱（XRD）显示存在四相ZrO 2或四相SnO 2以及随浓度变化的正交ZrSnO 4。ZrSnO 4的晶粒尺寸大于ZrO 2或SnO 2。所有薄膜在紫外-可见光区的平均透射率均大于75%。随着掺杂浓度的增加，薄膜的禁带宽度从4.79 - 5.30eV增加，电导率从0.07 × 10 -4- 3.1 × 10 -4Ω-1 m-1增加。这种ZrO 2-SnO 2纳米复合薄膜可用于太阳能电池和气敏应用。
Transparent nanocomposite ZrO2-SnO2thin films with molar ratio of ZrO2/SnO2, 0.1/0.3(ZS13), 0.1/0.2(ZS12), 0.2/0.1(ZS21), and 0.3/0.1 (ZS31) were prepared by sol-gel dip coating technique. X-ray diffraction spectra (XRD) of all samples showed the presence of either tetragonal ZrO2or tetragonal SnO2along with orthorhombic ZrSnO4with variation in concentration. The grain size of ZrSnO4was greater than that of ZrO2or SnO2. An average transmittance greater than 75% in UV–visible region was observed for all the films. The band gap of the films increased from 4.79 - 5.30 eV and the conductivity increased in the range of 0.07x10-4-3.1x10-4Ω-1m-1, with variations in concentration. Such ZrO2-SnO2nanocomposite thin films can be used in solar cell and gas sensing applications.