Bi1-xLaxFeO3(x=0, 0.3) thin films were deposited on glass/ITO substrates through Sol-Gel Dip-Coating method and rapid annealing process. The structures were detected by X-ray diffraction patterns, Raman spectrometer and scanning electron microscopy. The magnetic, ferroelectric and optical properties of the films were studied by vibrating sample magnetometer, ferroelectric integrate tester and photovoltaic performance testing system, respectively. The experimental results indicate that BiFeO3 thin film presents rhombohedral perovskite structure and Bi0.7La0.3FeO3 films showed distorted perovskite structure, which were confirmed by XRD patterns and Raman spectrometer. The magnetism and ferroelectric properties of the films were obviously enhanced by La doping. Furthermore, the photocurrent response and photovltaic effect in BLFO thin films were detected.

In this paper, Pulsed laser deposition (PLD) is attempted to be an alternative synthesis method for Cu-Ga-In (CIGS) thin films. Cu-In-Ga prefabricated metal films were grown on the quartz substrates by PLD method. Then the CIGS films with different Se content were synthesized by the post-selenization(Se)-annealing processes. The structure, element component proportion and optical properties of the CIGS films were investigated. The experimental results indicate that the CIGS films can be well obtained by the PLD method with Se-annealing. The performances of the CIGS films are much affect by the Se-annealing processes, including Se-annealing temperature, annealing time, and the way of Se-annealing. The CIGS films prepared by PLD method with Se-annealing present fine visible light absorption properties.