Discovery of a novel visible-light-active photodetector based on bismuth ferrite: constructing and optimizing the Cr-doped-BiFeO3/NiO thin film heterostructure

Reaching the Potential of Ferroelectric Photovoltaics

“…8 Chromium doping in BFO has been shown to decrease the bandgap of BFO to 2.41 eV while concurrently decreasing the leakage current, shown in Figure 2a and b. 22 In BFCO altering the Fe/Cr cation ordering and decreasing the scale of regions of chemical inhomogeneity was found to further decrease E g to 1.43. 8 The improvement in photovoltaic efficiency in the multilayered BFCO device was originally primarily attributed to the increased absorption of light, but recent theoretical work on BFCO showed that the change in the band edge character and B-site disorder was the primary factor in the high PCE.…”

“…BiFeO 3 (BFO) initially generated substantial interest for FePv applications due to its relatively low bandgap of 2.54 eV . Chromium doping in BFO has been shown to decrease the bandgap of BFO to 2.41 eV while concurrently decreasing the leakage current, shown in Figure a and b . In BFCO altering the Fe/Cr cation ordering and decreasing the scale of regions of chemical inhomogeneity was found to further decrease E g to 1.43 .…”

“…Effect of chromium doping on (a) the bandgap and (b) the leakage current in BiFe 1– x Cr x O 3 thin films (Reproduced with permission from ref . Copyright 2023 Elsevier).…”

Piezo-Enhanced Photocatalytic Performance of Bismuth Ferrite-Based Thin Film for Organic Pollutants Degradation

“…The crystallinity of the thin film has a very important impact on the ferroelectric properties and photovoltaic capability of the tested sample. Compared to Cr-doped bismuth ferrite thin films obtained by chemical routes where additional thermal treatments are necessary to crystallize the otherwise amorphous materials or to the ones grown by pulsed laser deposition technique where a uniform layer can be deposited on a limited area, HiPIMS allows the growth of a highly crystalline sample with limited structural defects over large surfaces [19][20][21][22][23]. The choice of substrate type can have a significant impact on the crystallographic growth of the deposited samples.…”