Multiferroic oxide BFCNT/BFCO heterojunction black silicon photovoltaic devices

Abstract

Multiferroics are being studied increasingly in applications of photovoltaic devices for the carrier separation driven by polarization and magnetization. In this work, textured black silicon photovoltaic devices are fabricated with Bi6Fe1.6Co0.2Ni0.2Ti3O18/Bi2FeCrO6 (BFCNT/BFCO) multiferroic heterojunction as an absorber and graphene as an anode. The structural and optical analyses showed that the bandgap of Aurivillius-typed BFCNT and double perovskite BFCO are 1.62 ± 0.04 eV and 1.74 ± 0.04 eV respectively, meeting the requirements for the active layer in solar cells. Under the simulated AM 1.5 G illumination, the black silicon photovoltaic devices delivered a photoconversion efficiency (η) of 3.9% with open-circuit voltage (Voc), short-circuit current density (Jsc), and fill factor (FF) of 0.75 V, 10.8 mA cm−2, and 48.3%, respectively. Analyses of modulation of an applied electric and magnetic field on the photovoltaic properties revealed that both polarization and magnetization of multiferroics play an important role in tuning the built-in electric field and the transport mechanisms of charge carriers, thus providing a new idea for the design of future high-performance multiferroic oxide photovoltaic devices.

Chiral recognition of tryptophan enantiomer based on the electrode modified by polyaniline adsorption bovine serum albumin complex

“…The diametrically opposite situation is found for the BSA/GCE; this may be due to the insulative BSA protein films on the GCE that hindered the electron transfer 28 . When the GCE was coated by the BSA, the electrochemical activity of the electrode surface was also reduced, so there is decreasing in the oxidation peak current 29,30 . This also explains why the peak current value of APS‐DPANI‐BSA in several CV test results was always focused on the intermediate of APS‐DPANI and BSA.…”

“…28 When the GCE was coated by the BSA, the electrochemical activity of the electrode surface was also reduced, so there is decreasing in the oxidation peak current. 29,30 This also explains why the peak current value of APS-DPANI-BSA in several CV test results was always focused on the intermediate of APS-DPANI and BSA. EIS is a fundamental electrochemistry tool widely used to characterize the load condition of the chiral surface materials.…”

Exploration of the photovoltaic properties of oxide-based double perovskite Bi2FeCrO6 using an amalgamation of DFT with spin–orbit coupling effect and SCAPS-1D simulation approaches

“…In addition to this, the band offset between interfaces plays a vital role in tuning the efficiencies. Unlike the experiment which used a 160 nm thickness for the active layer and a bandgap of 1.7 eV, 22 we have used a higher thickness of the absorber layer (1100 nm). The thickness of the light-absorbing layer in the solar cell can potentially affect the short-circuit current ( J sc ).…”

“…Finally, the graphene electrode is deposited by spin coating followed by drying under vacuum to reduce the moisture content. 22…”

“…Owing to its narrow bandgap, BFCO can absorb the majority portion of the solar spectrum (visible wavelengths) and can be a potential material for photovoltaic and photochemical applications. BFCO 22 NiO x :Cu/Bi Improved PV response of Bi-Mn-O composite thin films with mixed crystal phases. Inorganic perovskite oxides BiMnO 3 and BiMn 2 O 5 exhibit narrow bandgaps of 1.2 eV and 1.23 eV, respectively.…”