Physical properties of nanostructured TiO2 thin films grown by RF magnetron sputtering: Impact of substrate type

被引:0
作者
Khodja, S. [1 ]
Touam, T. [2 ]
Chelouche, A. [3 ]
机构
[1] Univ Kasdi Merbah Ouargla, Radiat & Plasma & Surface Phys Lab, Ouargla 30000, Algeria
[2] Univ Badji Molthtar Annaba, Semicond Lab, Annaba 23000, Algeria
[3] Univ Bejaia, Lab Environm Engn, Bejaia 06000, Algeria
关键词
TiO2 thin films; RF sputtering; Substrate type; microstructural study; optical properties; optoelectronic applications; CHEMICAL-VAPOR-DEPOSITION; SENSITIZED SOLAR-CELLS; OPTICAL-PROPERTIES; PHOTOCATALYTIC PROPERTIES; ANATASE; PRESSURE; COATINGS; TRANSMITTANCE; TEMPERATURE; FABRICATION;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Titanium dioxide (TiO2) thin films were successfully prepared on three different substrates (glass, quartz and silicon (Si(100)) at room temperature with a deposition time of 90 min using RF magnetron sputtering technique. The TiO2 thin films are then air-annealed at 400 degrees C for one hour and the effect of the substrate type on the microstructure, morphology, surface topography, transmittance and optical band gap of these films was investigated by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM) and UV-Visible (UV-Vis) spectrophotometry. XRD analysis showed that all thin films are polycrystalline and crystallize only in the tetragonal anatase structure of TiO2 with a preferential orientation along the (101) plane. The crystallinity, peak intensity, and crystallite growth are found to be substrate type dependent. The observed Raman peaks confirmed the presence of anatase phase in all samples in good agreement with XRD data. SEM and AFM images revealed that TiO2 thin films exhibit a different surface topography, which seems to be influenced by the substrate type, as expressed in terms of average grain size and surface roughness. Transmittance spectra put into evidence that the TiO2 thin film grown on quartz demonstrated a higher average transmission in the visible region than that deposited on glass substrate. Moreover, the obtained values of band gap and refractive index for TiO2 thin films deposited on glass and quartz substrates were found to be 3.615 and 3.512 eV, and 2.248 and 2.271, respectively.
引用
收藏
页码:55 / 62
页数:8
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