Optical properties of BiFeO3 and Bi0.9La0.1 FeO3 films on silicon substrates
BiFeO3 (BFO) and Bi0.9La0.1Fe0.3 (BLFO) thin films were deposited on Si (100) wafer by sol-gel technique. The microstructure and surface morphology of the films were characterized using X-ray diffraction and atomic force microscope. After annealing at 600 °C, all the films were well-crystallized, and the diffraction peaks corresponded to BFO standard pattern quite well. The optical properties of BFO and BLFO film were studied by spectroscopic ellipsometry in the wavelength range 420 to 1700 nm. Compared with the BFO film, the BLFO film has lower refraction index and higher extinction coefficient in the wavelength range 600 to 1700 nm. The absorption coefficient of the BLFO film is greater than 1700cm-1 in total measured wavelength region. The results suggest that the potential role of La dopant improved the optical properties of BFO thin film and the BLFO film is a promising material for photovoltaic devices.
D J Huang H M Deng F Chen H Deng P X Yang J H Chu
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of electronics, Eas Key Laboratory for Material Microstrucrures of Shanghai University, Shanghai University, 99 Shangda
国际会议
3rd International Photonics & OptoElectronics Meetings(第三届国际光子与光电子学会议 POEM 2010)
武汉
英文
1-5
2010-11-03（万方平台首次上网日期，不代表论文的发表时间）