Bismuth ferrite materials for solar cells: Current status and prospects

Chen, Guang; Chen, Jian; Pei, Weijie; Lu, Yinmei; Zhang, Qingfeng; Zhang, Qi; He, Yunbin

doi:10.1016/j.materresbull.2018.10.011

Cited by 99 publications

(37 citation statements)

References 97 publications

(109 reference statements)

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“…The same authors reported in 2010 [391] with respect to the in-plane electrodes was found to critically modulate their photovoltaic performances; either, above bandgap voltages (when perpendicular to the current flow) or just enhanced photocurrents (when parallel to the current flow). Following these works, many investigations have been focused on enhancing the photovoltaic properties of BiFeO 3 thinfilms during the last decade, although the overall power conversion efficiency still remains low (below 1%) [393] , [394] , [337,397] , [398] . It has been common to substitute and/or to dope…”

Section: Wide Bandgap Ferroelectric Oxide Thin-filmsmentioning

confidence: 99%

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Pérez‐Tomás

2019

Adv Materials Inter

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New device concepts and new computing principles are needed to balance our ever-growing appetite for data and information with the realization of the goals of increased energy efficiency, reduction in CO 2 emissions and the circular economy. Neuromorphic or synaptic electronics is an emerging field of research aiming to overcome the current computer's Von-Neumann bottleneck by building artificial neuronal systems to mimic the extremely energy efficient biological synapses. The introduction of photovoltaic and/or photonic aspects into these neuromorphic architectures will produce self-powered adaptive electronics but may also open up new possibilities in artificial neuroscience, artificial neural communications, sensing and machine learning which would enable, in turn, a new era for computational systems owing to the possibility of attaining high bandwidths with much reduced power consumption. This perspective is focused on recent progress in the implementation of functional oxide thinfilms into photovoltaic and neuromorphic applications towards the envisioned goal of selfpowered photovoltaic neuromorphic systems or a solar brain.

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Section: Wide Bandgap Ferroelectric Oxide Thin-filmsmentioning

confidence: 99%

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Pérez‐Tomás

2019

Adv Materials Inter

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“…In recent years, the photovoltaic effect of ferroelectric materials, such as Pb(Zr,Ti)O 3 [6], BaTiO 3 [7,8] and BiFeO 3 [9,10,11], have attracted a lot of research for photovoltaic application. Among many ferroelectric materials, BiFeO 3 (BFO) is the most representative [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

The Microstructure, Electric, Optical and Photovoltaic Properties of BiFeO3 Thin Films Prepared by Low Temperature Sol–Gel Method

et al. 2019

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Ferroelectrics have recently attracted attention as a candidate class of materials for use in photovoltaic devices due to their abnormal photovoltaic effect. However, the current reported efficiency is still low. Hence, it is urgent to develop narrow-band gap ferroelectric materials with strong ferroelectricity by low-temperature synthesis. In this paper, the perovskite bismuth ferrite BiFeO3 (BFO) thin films were fabricated on SnO2: F (FTO) substrates by the sol–gel method and they were rapidly annealed at 450, 500 and 550 °C, respectively. The microstructure and the chemical state’s evolution with annealing temperature were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), and the relationship between the microstructure and electric, optical and photovoltaic properties were studied. The XRD, SEM and Raman results show that a pure phase BFO film with good crystallinity is obtained at a low annealing temperature of 450 °C. As the annealing temperature increases, the film becomes more uniform and has an improved crystallinity. The XPS results show that the Fe3+/Fe2+ ratio increases and the ratio of oxygen vacancies/lattice oxygen decreases with increasing annealing temperature, which results in the leakage current gradually being reduced. The band gap is reduced from 2.68 to 2.51 eV due to better crystallinity. An enhanced photovoltaic effect is observed in a 550 °C annealed BFO film with a short circuit current of 4.58 mA/cm2 and an open circuit voltage of 0.15 V, respectively.

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“…The calculated bandgap value from Tauc relation are Eg= 2.73 eV and Eg=2.31 eV for compound and composite respectively [38]. The decrease in band gap energy and broad absorption of composite sample makes it more suitable to be used in optoelectronics devices as compared to compound sample [39].…”

Section: Optical Studiesmentioning

confidence: 96%

Tailoring of electrical properties in nanostructured (NiO)_0.25(Fe₂O₃)_0.75 composite and compound for sensing applications

Farooq

Anis-ur-Rehman

Haq

2019

Mater. Res. Express

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Compound and composite of the (NiO) 0.25 (Fe 2 O 3 ) 0.75 nanoparticles have been prepared by without water and surfactants (WOWS), Sol-gel method. Synthesized nanoparticles are calcined at 500°C/2 h and pellets are sintered at 550°C/1 h. The compound and composite showed cubic lattice and rhombohedral crystallographic lattices respectively. Morphological analysis is done by Scanning electron microscope and Transmission electron microscope. UV characterization was done to calculate band gap energies for both samples. DC electrical conductivity as a function temperature from 373.15 to 703.15 K was done by two-probe method. DC conductivity has been explained by hopping mechanism. Activation energies were calculated from Arrhenius plots. AC electrical properties namely; dielectric constant, dielectric loss tangent, ac conductivity and impedance were measured as a function of frequency (20 Hz-3 MHz). AC electrical properties were explained by Maxwell-Wegner model, Koop's theory and Johnsher's power law. Composite of (NiO) 0.25 (Fe 2 O 3 ) 0.75 showed enhanced properties as compared to compound.

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Bismuth ferrite materials for solar cells: Current status and prospects

Cited by 99 publications

References 97 publications

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

The Microstructure, Electric, Optical and Photovoltaic Properties of BiFeO3 Thin Films Prepared by Low Temperature Sol–Gel Method

Tailoring of electrical properties in nanostructured (NiO)_0.25(Fe₂O₃)_0.75 composite and compound for sensing applications

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Bismuth ferrite materials for solar cells: Current status and prospects

Cited by 99 publications

References 97 publications

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

Functional Oxides for Photoneuromorphic Engineering: Toward a Solar Brain

The Microstructure, Electric, Optical and Photovoltaic Properties of BiFeO3 Thin Films Prepared by Low Temperature Sol–Gel Method

Tailoring of electrical properties in nanostructured (NiO)0.25(Fe2O3)0.75 composite and compound for sensing applications

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Tailoring of electrical properties in nanostructured (NiO)_0.25(Fe₂O₃)_0.75 composite and compound for sensing applications