文档介绍：
Effect of thickness on the photovoltaic properties of BiFeO3
thin film#
5
10
15
20
25
30
35
40
ZHOU Yin'e1, TAN Xinyu2, YU Benfang1, LIU Li1, YUAN Songliu1, JIAO
Weihong1**
(1. School of Physics, Huazhong University of Science and Technology, 430074;
2. Research Institute for New Energy, China Three Gorges University, 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 film thickness change, the great
transitions have taken 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.
Key words: Photovoltaic properties; BiFeO3 film; Film thickness
0 Introduction
The photovoltaic properties of ferroelectric materials have e a research hotspot on
account of the potential application values for photovoltaic cell and photo-driven actuator or
optical sensor in micro-electromechanical systems. It is found that BiFeO3 (BFO) exhibits high
sensitivity and fast response to the visible light due to the band gap in the visible range [1,2].
Furthermore, BFO is the single-phase multiferroic material at roo