Regulation of Photovoltaic Response in ZSO-Based Multiferroic BFCO/BFCNT Heterojunction Photoelectrodes via Magnetization and Polarization
journal contributionposted on 2021-07-26, 15:03 authored by Kaixin Guo, Rongfen Zhang, Zhao Fu, Liangyu Zhang, Xu Wang, Chaoyong Deng
Multiferroic devices have attracted renewed attention in applications of photovoltaic devices for their efficient carrier separation driven by internal polarization, magnetization, and above-bandgap generated photovoltages. In this work, Zn2SnO4-based multiferroic Bi6Fe1.6Co0.2Ni0.2Ti3O18/Bi2FeCrO6 (BFCNT/BFCO) heterojunction photoelectrodes were fabricated. Structural and optical analyses showed that the bandgap of the spinel Zn2SnO4 is ∼3.1 eV while those of Aurivillius-type BFCNT and double-perovskite BFCO are 1.62 and 1.74 eV, respectively. Under the simulated AM 1.5G illumination, the as-prepared photoelectrodes delivered a photoconversion efficiency (η) of 3.40% with a short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) of 10.3 mA·cm–2, 0.66 V, and 50.4%, respectively. Analyses of adjustment of an applied electric and magnetic field on photovoltaic properties indicated that both magnetization and polarization of multiferroics can effectively tune the built-in electric field and the transport of charge carriers, providing a new idea for the design of future high-performance multiferroic oxide photovoltaic devices.
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magnetizationphotovoltaic propertiesBiPhotovoltaic Responsemultiferroic oxide photovoltaic devicescharge carriersAurivillius-type BFCNTcarrier separation0.66 Vas-prepared photoelectrodesspinel Zn 2 SnO 41.74 eVFFdouble-perovskite BFCOZn 2 SnO 40.2photovoltaic devicespolarizationAM 1.5 G illuminationPolarization Multiferroic devices