Effects of Thickness and Polarization Field on the Photovoltaic Properties of BiFeO3 Thin Films
ZHOU Yin-E1,2, TAN Xin-Yu3, YU Ben-Fang1, LIU Li1, YUAN Song-Liu1**, JIAO Wei-Hong1
1School of Physics, Huazhong University of Science and Technology, Wuhan 430074 2College of Science, China Three Gorges University, Yichang 443002 3Research Institute for New Energy, China Three Gorges University, Yichang 443002
Abstract：We study the effects of film thickness on lattice parameters, direct band gap and photovoltaic outputs in the sol-gel derived BiFeO3 thin films. With the change of the film thickness, the great transitions will take place in the preferred orientation and lattice parameters. Furthermore, the photovoltaic outputs are significantly dependent on the film thickness. The results show that the open circuit voltage gradually increases and the short circuit current reciprocally decreases with the increase of film thickness. In particular, we demonstrate for the first time that there are tunable photovoltaic outputs with external electric field polarization switching in the polycrystalline BiFeO3 film, which is critical for the future device applications based on the photovoltaic properties of BiFeO3 films.
. [J]. 中国物理快报, 2014, 31(03): 37304-037304.
ZHOU Yin-E, TAN Xin-Yu, YU Ben-Fang, LIU Li, YUAN Song-Liu, JIAO Wei-Hong. Effects of Thickness and Polarization Field on the Photovoltaic Properties of BiFeO3 Thin Films. Chin. Phys. Lett., 2014, 31(03): 37304-037304.
2014, Vol. 31 
