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Photovoltaic technology has been a research hotspot in the field of renewable and clean solar energy. More recently, the ferroelectric photovoltaic effect (FEPV) of BiFeO3 has attracted much attention, since it could obtain a giant open-circuit voltage (VOC) far beyond its bandgap and possibly break through the energy conversion limit of traditional solar cells. However, there has been controversy about the origin and the mechanism of FEPV in BiFeO3. In this work, (Pr, Ni) co-doped BiFeO3 film photovoltaic devices were well constructed and the intrinsic mechanism of the photovoltaic effect was...

Photovoltaic energy as one of the important alternatives to traditional fossil fuels has always been a research hot spot in the field of renewable and clean solar energy. Very recently, the anomalous ferroelectric photovoltaic effect in multiferroic bismuth ferrite (BiFeO3) has attracted much attention due to the above-bandgap photovoltage and switchable photocurrent. However, its photocurrent density mostly in the magnitudes of μA/cm2 resulted in a poor power conversion efficiency, which severely hampered its practical application as a photovoltaic device. In this case, a novel approach was ...

Sponsored by Park SystemsApr 29 2021 It is possible to generate long-range wavelength ordering known as Moiré superlattice periodicity by stacking two-dimensional (2D) materials within each other’s van der Waals interaction distance. When this process is applied to graphene on hexagonal boron nitride (hBN), this effect would appear on the uppermost layer of graphene, causing graphene’s energy bandgap to open. 1,2,3  Regulating lattice orientation between graphene and boron nitride can facilitate variation in the Moiré periodicity's wavelength, effectively tuning the graphene energy ban...

Sponsored by Park SystemsJan 21 2021 Ferroelectrics found extensive uses in industrial applications because of their unparalleled electromechanical and electrical characteristics, for example, as actuators, sensors and capacitors [1], [2]. The suitability of ferroelectrics for modern communication technology is currently investigated by researchers, including 5G [3] and as active layers in photovoltaics [4, 5] among other applications [6]. Ferroelectricity is the consequence of an alteration in crystal symmetry during a phase transition. A sudden electrical polarization is introduced by an o...