Switchable photovoltaic effect in Au/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures

Gao, Rongli; Fu, Chunlin; Cai, Wei; Chen, Gang; Deng, Xiaoling; Cao, Xianlong

doi:10.1016/j.matchemphys.2016.06.059

Cited by 18 publications

(15 citation statements)

References 30 publications

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“…Unlike the p‐n junction interfacial photovoltaic (PV) effect in traditional solar cells, the photogenerated carries in FPV materials can be better separated by the polarization‐induced internal electric field existing in the whole‐bulk region of ferroelectric materials . In addition, the photocurrent direction can be switched by reversing the polarization of ferroelectric materials via an applied electric field . Stimulated by these outstanding features, PV effects of various ferroelectric materials, such as BiFeO 3 , Pb(Zr, Ti)O 3 , and BaTiO 3 have recently been studied.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 In addition, the photocurrent direction can be switched by reversing the polarization of ferroelectric materials via an applied electric field. 6 Stimulated by these outstanding features, PV effects of various ferroelectric materials, such as BiFeO 3 , 2 Pb(Zr, Ti)O 3 , 7 and BaTiO 3 8,9 have recently been studied. However, these traditional perovskite ferroelectrics usually have a wide band gap (above 2.7 eV) due to large differences in electron negativity between the B-site cations and oxygen anions, 10 which results in light absorption primarily in the ultraviolet (UV) region.…”

Section: Introductionmentioning

confidence: 99%

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Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

et al. 2018

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Inorganic perovskite [KNbO3]0.9[BaNi0.5Nb0.5O3‐σ]0.1 (KBNNO) ferroelectric thin films with narrow band gap (1.83 eV) and high room‐temperature remnant polarization (Pr = 0.54 μC/cm2) was grown successfully on the Pt(111)/Ti/SiO2/Si(100) substrates by pulsed laser deposition. Ferroelectric solar cells with a basic structure of ITO/KBNNO/Pt were further prepared based on these thin films, which exhibited obvious external‐poling dependent photovoltaic effects. When the devices were negatively poled, the short‐circuit current and open‐circuit voltage were both significantly higher than those of the devices poled positively. This is attributed to enhanced charge separation under the depolarization field induced by the negative poling, which is superimposed with the built‐in field induced by the Schottky barriers at the interfaces between KBNNO and the two electrodes. When a poling voltage of ‐1 V was applied, the device showed a short‐circuit current as high as 27.3 μA/cm2, which was by two orders of magnitude larger than that of the KBNNO thick‐film (20 μm) devices reported previously. This work may inspire further exploration for lead‐free inorganic perovskite ferroelectric photovoltaic devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

et al. 2018

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“…Multiferroic material is a novel multi-functional material which couples electrical, magnetic and structural ordering parameters, and thus produces ferroelectric, ferromagnetic and ferroelastic effects [1][2][3][4][5]. Especially, the magnetoelectric (ME) effect has become a hot topic in recent years due to its intriguing physical properties and practical applications in various of device such as super capacitor, spintronic devices, information storage, sensors, transistors and so on [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Till now, several composite materials have been studied, including Co 0.5 Ni 0. 5 [32], PZT/CFO [33], and NiFe 2 O 4 -BaTiO 3 [34]. Among them, CoFe 2 O 4 (CFO) is the most studied magnetic material in the magnetoelectric composites due to its good magnetization, large magnetostriction coefficient and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios

Gao

et al. 2019

J. Phys. Commun.

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Magnetoelectric composites have attracted much attentions due to their excellent multiferroic properties at room temperature. In this paper, CoFe 2 O 4 -PbZr 0.52 Ti 0.48 O 3 (CFO-PZT) composite ceramics with different molar ratios (CFO/PZT=1:4, 1:5, 1:6 and 1:7) were prepared by conventional solid reaction method. Effects of molar ratio on the structure, dielectric, ferroelectric and magnetic properties were comparatively investigated. X-ray diffraction patterns confirmed biphase structures of the composites, which can be indexed as CFO and PZT, no other obvious phase can be found with the limitation of the XRD resolution. Scanning electron microscopy (SEM) images show that the surface of the prepared samples is not dense enough and many pores are formed, the mean grain size is about 200 nm. The same relaxation behavior was observed in the intermediate temperature range of PZT-CFO composite ceramics. At room temperature, the dielectric constant and dielectric loss of the specimen 1:4 are the highest. The leakage current of the sample 1:4 is the lowest while the sample 1:6 has the largest value. As the CFO content in the composite decreases, both the saturation (Ms) and the remnant (Mr) magnetization decrease. Among them, the sample 1:4 presents better ferroelectric and magnetic properties, the remnant polarization is 1.13 μC cm −2 , the saturation magnetization and remnant magnetization are 11.01 and 3.28 emu g −1 , respectively. The sample 1:6 has the largest coercive field (945.27 Oe) while the sample 1:7 show the smallest value (681.19 Oe). Interface interaction between CFO/PZT may be applied to explain this phenomenon.

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“…It is worth mentioning that bulk photovoltaic effect (BPVE) is another primary mechanism, which was discovered in noncentrosymmetric ferroelectrics several decades ago. It is often suggested that different from p-n junction based systems, BPVE does not require an asymmetric interface, especially its photovoltage is not limited by the band gap of the material, which can reach 10 3 V/cm or more and it is called anomalous photovoltaic effect [12][13][14]. All of the various ferroelectric materials, BiFeO 3 (BFO) is of particular interest because of its robust ferroelectricity, room temperature coexistence of ferroelectric and antiferromagnetic orders and the possible magnetoelectric couple effect.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric Photovoltaic Effect

Gao¹,

Wang²,

Fu³

et al. 2018

Ferroelectrics and Their Applications

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Tetragonal BiFeO 3 films with the thickness of 30 nm were grown epitaxially on (001) oriented LaAlO 3 substrate by using pulsed laser deposition (PLD). The transverse photovoltaic effects were studied as a function of the sample directions in-plane as well as the angle between the linearly polarized light and the plane of the sample along X and Y directions. The absorption onset and the direct band gap are ~2.25 and ~2.52 eV, respectively. The photocurrent depends not only on the sample directions in-plane but also on the angle between the linearly polarized light and the plane of the sample along X and Y directions. The results indicate that the bulk photovoltaic effect together with the depolarization field was ascribed to this phenomenon. Detailed analysis presents that the polarization direction is along [110] direction and this depolarization field induced photocurrent is equal to ~3.53 μA/cm 2 . The BPV induced photocurrent can be approximate described as Jx ≈ 2.23cos(2θ), such an angular dependence of photocurrent is produced as a consequence of asymmetric microscopic processes of carriers such as excitation and recombination.

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Switchable photovoltaic effect in Au/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures

Cited by 18 publications

References 30 publications

Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios

Ferroelectric Photovoltaic Effect

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Switchable photovoltaic effect in Au/Bi0.9La0.1FeO3/La0.7Sr0.3MnO3 heterostructures

Cited by 18 publications

References 30 publications

Greatly enhanced photocurrent in inorganic perovskite [KNbO3]0.9[BaNi0.5Nb0.5O3‐σ]0.1 ferroelectric thin‐film solar cell

Greatly enhanced photocurrent in inorganic perovskite [KNbO3]0.9[BaNi0.5Nb0.5O3‐σ]0.1 ferroelectric thin‐film solar cell

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe2O4/PbZr0.52Ti0.48O3 multiferroic composite with different molar ratios

Ferroelectric Photovoltaic Effect

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Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

Greatly enhanced photocurrent in inorganic perovskite [KNbO₃]_0.9[BaNi_0.5Nb_0.5O_3‐σ]_0.1 ferroelectric thin‐film solar cell

A comparative study on the structural, dielectric, ferroelectric and magnetic properties of CoFe₂O₄/PbZr_0.52Ti_0.48O₃ multiferroic composite with different molar ratios