STRUCTURAL, ELECTRICAL AND OPTICAL PROPERTIES OF TiO2THIN FILM DEPOSITED ON THE NANO POROUS SILICON TEMPLATE
| Autor: | Mahmood Bahar, Ensieh Khalili Dermani |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Silicon Analytical chemistry chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics Porous silicon 01 natural sciences Electron beam physical vapor deposition Surfaces Coatings and Films Titanium oxide Nano porous chemistry 0103 physical sciences Materials Chemistry Composite material Electrochemical etching Thin film 0210 nano-technology |
| Zdroj: | Surface Review and Letters. 24:1850017 |
| ISSN: | 1793-6667 0218-625X |
| DOI: | 10.1142/s0218625x18500178 |
| Popis: | The porous silicon (PSi), which is produced by the electrochemical etching, has been used as a substrate for the growth of the titanium oxide (TiO2) thin films. By using the EBPVD method, TiO2thin films have been deposited on the surface of the PSi substrate. TiO2/PSi layers were annealed at the temperature of 400[Formula: see text]C, 500[Formula: see text]C and 600[Formula: see text]C for different tests. The morphology and structures of layers were investigated by the scanning electron microscopy (SEM) and X-ray diffraction (XRD). The current–voltage characteristic curves of samples and the ideality factor of heterojunction were studied. The results showed that the electrical properties of the samples change with increase in the annealing temperature. The optical properties of the prepared samples were investigated by using UV–Vis and photoluminescence (PL) spectroscopy. Green light emission of the PSi combined with the blue light and violet–blue emission obtained from the TiO2/PSi PL spectra. The results showed that the optical band gap energy of the PSi has increased from 1.86[Formula: see text]eV to 2.93[Formula: see text]eV due to the deposition of TiO2thin film. |
| Databáze: | OpenAIRE |
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