取向对铁酸铋薄膜漏电机制和光伏性能的影响
Effect of Orientation on Leakage Mechanism and Photovoltaic Properties in Bismuth Ferrite Thin Films
摘要: 本文通过偏轴磁控溅射法，以不同取向钛酸锶SrTiO3 (STO)单晶基片为衬底，镧锶钴氧La0.5Sr0.5CoO3 (LSCO)为底电极，铁酸铋BiFeO3 (BFO)为铁电介质，构架了Pt/BFO/LSCO/STO异质结电容器。XRD结果显示不同取向的BFO薄膜均为外延结构。研究了不同取向Pt/BFO/LSCO异质结的漏电机制和光伏性能。J-V数据拟合表明，Pt/BFO/LSCO漏电流大小依赖于BFO薄膜取向，满足(001)J > (110)J > (111)J规律。不同取向Pt/BFO/LSCO异质结的导电机制均为：低电场欧姆导电和高电场肖特基导电。通过铁电光伏系统对Pt/BFO/LSCO异质结的光伏性能进行了测量，结果表明开路电压VOC和短路电流JSC强烈依赖于BFO薄膜取向，(111)取向最大、(110)取向次之、(001)取向最小。
Abstract: The Pt/BFO/LSCO/STO heterojunction capacitor were fabricated on three oriented SrTiO3 (STO) single crystal substrates by off-axis RF magnetron sputtering, La0.5Sr0.5CoO3 (LSCO) as bottle electrode and BiFeO3 (BFO) film as ferroelectric medium. XRD results show that BFO films with different orientations are epitaxial. The leakage mechanism and photovoltaic performance of Pt/BFO/LSCO heterostructure are studied. The fitting of J-V data shows that the leakage current of Pt/BFO/LSCO depends on the orientation of BFO films, which satisfies the rule of (001)J > (110)J > (111)J. The conduction mechanisms of Pt/BFO/LSCO heterostructure with different orientations are: low electric field ohmic conduction and high electric field Schottky conduction. The photovoltaic characteristics of Pt/BFO/LSCO heterostructureare characterized by ferroelectric photovoltaic system. The results show that the Voc and Jsc strongly depend on the orientation of BFO film, with (111) orientation the largest, (110) the second and (001) the smallest.
文章引用：于笑妍, 魏一, 李昊阳, 张萌, 李奕瑄, 高洁, 张宪贵, 宋建民, 曾浩宇. 取向对铁酸铋薄膜漏电机制和光伏性能的影响[J]. 纳米技术, 2022, 12(2): 41-48. https://doi.org/10.12677/NAT.2022.122006

参考文献

[1] Deng, Q., Wang, Z., Wang, S., et al. (2017) Simulation of Planar Si/Mg2Si/Si p-i-n Heterojunction Solar Cells for High Efficiency. Solar Energy, 158, 654-662. [Google Scholar] [CrossRef] 
[2] Tablero, C. (2017) An Evaluation of BiFeO3 as a Photovoltaic Material. Solar Energy Materials & Solar Cells, 171, 161-165. [Google Scholar] [CrossRef] 
[3] 李冬雯, 刘守清. 铁酸铋可见光催化降解黄腐酸[J]. 苏州科技大学学报(自然科学版), 2020, 37(3): 50-55.
[4] 项欣, 杨俊和, 程晋荣. 纳米BiFeO3的制备及其光催化性能研究进展[J]. 广州化工, 2020, 48(15): 10-12.
[5] Nie, C., Zhao, S., Bai, Y., et al. (2016) The Ferroelectric Photovoltaic Effect of BiCrO3/BiFeO3 Bilayer Composite Films. Ceramics International, 42, 14036-14040. [Google Scholar] [CrossRef] 
[6] Chen, G., Chen, J., Pei, W., et al. (2018) Bismuth Ferrite Ma-terials for Solar Cells: Current Status and Prospects. Materials Research Bulletin, 110, 39-49. [Google Scholar] [CrossRef] 
[7] Zhang, F., Li, M., Zhu, Y., et al. (2017) Ferroelectric Po-larization Enhancement of Photovoltaic Effects in BaTiO3/BiFeO3/TiO2 Heterostructure by Introducing Dou-ble-Functional Layers. Journal of Alloys and Compounds, 695, 3178-3182. [Google Scholar] [CrossRef] 
[8] Wang, X.W., Liang, Y.F., Sun, L.Y., et al. (2020) Effects of Mn Doping on Ferroelectric, Ferromagnetic and Optical Properties of BiFeO3 Thin Films. Physica B, 594, Article ID: 412317. [Google Scholar] [CrossRef] 
[9] Mocherla, P., Karthik, C., Ubic, R., et al. (2013) Tuna-ble Bandgap in BiFeO3 Nanoparticles: The Role of Microstrain and Oxygen Defects. Applied Physics Letters, 103, 2463-2485. [Google Scholar] [CrossRef] 
[10] Luo, Y., Qiao, L., Zhang, Q., et al. (2018) Tunable Photoelec-tric Response in NiO-Based Heterostructures by Various Orientations. Applied Physics Letters, 112, Article ID: 093301. [Google Scholar] [CrossRef] 
[11] Zhu, W.M., Zhang, X.M., Liu, A.Q., et al. (2008) A Micromachined Opti-cal Double Well for Thermo-Optic Switching via Resonant Tunneling Effect. Applied Physics Letters, 92, Article ID: 251101. [Google Scholar] [CrossRef] 
[12] Jeong, D.S., Park, H.B. and Hwang, C.S. (2005) Reasons for Obtaining an Optical Dielectric Constant from the Poole-Frenkel Conduction Behavior of Atomic-Layer-Deposited HfO2 Films. Applied Physics Letters, 86, Article ID: 072903. [Google Scholar] [CrossRef] 
[13] Shang, D.S., Wang, Q., Chen, L.D., et al. (2006) Effect of Carrier Trapping on the Hysteretic Current-Voltage Characteristics in Ag/La0.7Ca0.3MnO3/Ptheterostructures. Physical Review B, 73, Article ID: 245427. [Google Scholar] [CrossRef] 
[14] Liu, F., Ma, Y., Yang, F., et al. (2010) Schottky Barrier Height and Conduction Mechanisms in Ferroelectric Bismuth Titanate. Applied Physics Letters, 96, Article ID: 052102. [Google Scholar] [CrossRef] 
[15] Li, Q., Shen, K., Li, X., et al. (2018) Space-Charge Limited Current in CdTe Thin Film Solar Cell. Applied Physics Letters, 112, Article ID: 173901. [Google Scholar] [CrossRef] 
[16] Ji, D.P., Zhu, Q. and Wang, S.Q. (2016) Detailed First-Principles Studies on Surface Energy and Work Function of Hexagonal Metals. Surface Science, 651, 137-146. [Google Scholar] [CrossRef] 
[17] Huang, D., Deng, H., Yang, P., et al. (2010) Optical and Electrical Properties of Multiferroic Bismuth Ferrite Thin Films Fabricated by Sol-Gel Technique. Materials Letters, 64, 2233-2235. [Google Scholar] [CrossRef] 

为你推荐