Optical properties of SrTiO 3 thin films prepared by metalorganic decomposition
| Autor: | Ma Jian-Hua, Sun Jin-Lan, Chu Jun-hao, Shi Fu-Wen, Lin Tie, Meng Xiang-Jian |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Band gap Oscillator strength business.industry Analytical chemistry Physics::Optics General Physics and Astronomy Chemical vapor deposition Condensed Matter::Materials Science Optics Lattice constant Sputtering Condensed Matter::Superconductivity Dispersion (optics) Thin film business Refractive index |
| Zdroj: | Chinese Physics. 14:610-614 |
| ISSN: | 1741-4199 1009-1963 |
| Popis: | SrTiO3 thin films were deposited on vitreous silica substrates by metalorganic decomposition (MOD). The films are polycrystalline cubic in structure with the lattice constants of a=0.39nm. Their optical constants (refractive index n and extinction coefficient k) were calculated by the envelope method from the transmittance spectra in the wavelength range of 190nm to 1100nm. The refractive index of the present films is found to be higher than that of the other SrTiO3 films prepared by RF sputtering, sol–gel and chemical vapour deposition. The dispersion of the refractive index in the films follows the single electronic oscillator model with oscillator strength (S0) of 0.88×1014m−2 and oscillator energy (E0) of 6.40eV. The optical band gap of the films was estimated to be 3.68eV. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|