Qiu Jian-Hua, Chen Meng-Jiao, Zhao Tian-Xiang, Chen Zhi-Hui, Yuan Ning-Yi, Ding Jian-Ning
School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
School of Mathematics and Physics, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu, China.
J Nanosci Nanotechnol. 2020 Jan 1;20(1):564-567. doi: 10.1166/jnn.2020.16879.
A polycrystalline BiFeO₃ film was deposited on ITO substrate by RF magnetron sputtering method. Small crystallite size and compact structure are obtained for BiFeO₃ film which has the excellent ferroelectric properties. The measured photovoltaic response reveals an open-circuit voltage of ~0.52 V and a short-circuit current density of ~10 A/cm² under the illumination of 100 mW/cm² irradiance. Moreover, a tunable photovoltaic effect with light illumination is observed under different voltage sweep mode. High initial sweep voltage can enhance the photovoltaic effect largely, however, the photovoltaic response decreases with the increase of voltage sweep interval. The results indicate the ferroelectric polarization plays an important role in the photovoltaic effect.
采用射频磁控溅射法在ITO衬底上沉积了多晶BiFeO₃薄膜。所制备的BiFeO₃薄膜具有小的晶粒尺寸和致密的结构，展现出优异的铁电性能。测量得到的光伏响应显示，在100 mW/cm²辐照度的光照下，开路电压约为0.52 V，短路电流密度约为10 A/cm²。此外，在不同的电压扫描模式下，观察到光照具有可调节的光伏效应。较高的初始扫描电压能显著增强光伏效应，然而，光伏响应会随着电压扫描间隔的增加而降低。结果表明，铁电极化在光伏效应中起着重要作用。
