Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show ...Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films.The SEM observations show that the surface morphology of the films is affected by the sodium incorporation.The transmission spectra show that the average transmittance of the films is above 85% in the visible range.The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content.The optical constants of these films were calculated using transmission spectra.Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.展开更多
SrBi2.2 Ta2O9（SBT） thin film with thickness of 2μm was successfully prepared by sol-gel method, using strontium acetate semihydrate [Sr（CH3COO）2·1/2H2O] and bismth subnitrate [BiO（NO3）], and tantalum ethox...SrBi2.2 Ta2O9（SBT） thin film with thickness of 2μm was successfully prepared by sol-gel method, using strontium acetate semihydrate [Sr（CH3COO）2·1/2H2O] and bismth subnitrate [BiO（NO3）], and tantalum ethoxide [Ta（OCH2CH3）5] as source materials, glacial acetic and ethylene glycol as solvents. The X-ray diffraction（XRD） and transmission electron microscope（TEM） results indicate that SBT layer-perovskite phase obtained has to be single phase, SBT thin film is formed after being annealed at 800℃ for 1min. The typical hysteresis loop of SBT thin film on Pt/Ti/SiO2/Si is obtained, and the measured polarization value of the SBT thin film is 4.2μC/cm2.展开更多
基金Project(50872001) supported by the National Natural Science Foundation of ChinaProject(20060357003) supported by Research Fund for the Doctoral Program of Higher Education of ChinaProject(KJ2010A284) supported by the Natural Science Foundation of Anhui Higher Education Institution of China
文摘Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films.The SEM observations show that the surface morphology of the films is affected by the sodium incorporation.The transmission spectra show that the average transmittance of the films is above 85% in the visible range.The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content.The optical constants of these films were calculated using transmission spectra.Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.
文摘SrBi2.2 Ta2O9（SBT） thin film with thickness of 2μm was successfully prepared by sol-gel method, using strontium acetate semihydrate [Sr（CH3COO）2·1/2H2O] and bismth subnitrate [BiO（NO3）], and tantalum ethoxide [Ta（OCH2CH3）5] as source materials, glacial acetic and ethylene glycol as solvents. The X-ray diffraction（XRD） and transmission electron microscope（TEM） results indicate that SBT layer-perovskite phase obtained has to be single phase, SBT thin film is formed after being annealed at 800℃ for 1min. The typical hysteresis loop of SBT thin film on Pt/Ti/SiO2/Si is obtained, and the measured polarization value of the SBT thin film is 4.2μC/cm2.
