The photoinduced Rayleigh scattering in BaTiO3 crystals showing the bulk photovoltaic effect

Chanussot, G.; Fridkin, V. M.; Godefroy, G.; Jannot, B.

doi:10.1063/1.89471

Cited by 29 publications

(7 citation statements)

References 6 publications

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“…Since the BPVE tensor is odd, the photovoltaic current should change sign, but with equal magnitude, thereby explaining both the switchability property and that on average, the photovoltaic current in an equally mixed state of up and down domains macroscopically vanishes. Note also that the photovoltaic current vanishes above the Curie temperature in BTO [46,56] and PZT, [57] when spatial inversion symmetry is recovered in the high symmetry paraelectric phase.…”

Section: Reviewmentioning

confidence: 93%

Photovoltaics with Ferroelectrics: Current Status and Beyond

et al. 2016

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Ferroelectrics carry a switchable spontaneous electric polarization. This polarization is usually coupled to strain, making ferroelectrics good piezoelectrics. When coupled to magnetism, they become so-called multiferroic systems, a field that has been widely investigated since 2003. While ferroelectrics are birefringent and non-linear optically transparent materials, the coupling of polarization with optical properties has received, since 2009, renewed attention, triggered notably by low-bandgap ferroelectrics suitable for sunlight spectrum absorption and original photovoltaic effects. Consequently, power conversion efficiencies up to 8.1% were recently achieved and values of 19.5% were predicted, making photoferroelectrics promising photovoltaic alternatives. This article aims at providing an up-to-date review on this emerging and rapidly progressing field by highlighting several important issues and parameters, such as the role of domain walls, ways to tune the bandgap, consequences arising from the polarization switchability, and the role of defects and contact electrodes, as well as the downscaling effects. Beyond photovoltaicity, other polarization-related processes are also described, like light-induced deformation (photostriction) or light-assisted chemical reaction (photostriction). It is hoped that this overview will encourage further avenues to be explored and challenged and, as a byproduct, will inspire other research communities in material science, e.g., so-called hybrid halide perovskites.

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Section: Reviewmentioning

confidence: 93%

Photovoltaics with Ferroelectrics: Current Status and Beyond

et al. 2016

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“…Fundamental understanding of this mechanism is likely to offer new device prospects especially in optoelectronics and information storage . It is to be noted that the photovoltaic effect in ferroelectrics is well known since the 1960s and has been investigated for the optical reading of ferroelectric random‐access memories, photodiodes, and photovoltaic applications. Current research is focused on developing band‐gap tuned ferroelectric materials as their performance is restricted by low mobility of charge carriers and short diffusion lengths .…”

Section: Introductionmentioning

confidence: 99%

Optical Control of Ferroelectric Domains: Nanoscale Insight into Macroscopic Observations

Vats

Bai

Zhang

et al. 2019

Advanced Optical Materials

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has been investigated for the optical reading of ferroelectric random-access memories, [14,15] photodiodes, [16] and photovoltaic [4,[17][18][19][20][21][22][23] applications. Current research is focused on developing band-gap tuned ferroelectric materials as their performance is restricted by low mobility of charge carriers and short diffusion lengths. [24][25][26] Band-gap tuned ferroelectric materials are capable of hosting multiple functionalities (due to ferroelectricity and semiconducting features), which suggest the possibilities of multiple energy conversions (piezoelectric, pyroelectric, and photovoltaic) simultaneously. In this context, Bai et al. synthesized a novel band-gap (1.6 eV down from >4 eV) engineered lead-free ferroelectric composition, i.e. (K 0.5 Na 0.5 )NbO 3 -2 mol% Ba(Ni 0.5 Nb 0.5 )O 3−δ (KNBNNO or KNN-BNNO), and demonstrated multiple functionalities (piezoelectric, pyroelectric, and photovoltaic effects) and their cumulative effect using this single material. [27][28][29] (K 0.5 Na 0.5 )NbO 3 supports off-center distortion and is responsible for ferroelectric nature of KNN-BNNO while Ba(Ni 0.5 Nb 0.5 ) O 3−δ controls the electronic states in the gap of parent (K 0.5 Na 0.5 ) NbO 3 using oxygen vacancies and Ni +2 ions. [24] Simultaneous presence of ferroelectric and semiconducting features makes this composition alluring for photovoltaic applications. In addition, it also provides an opportunity to understand how ferroelectric properties in semiconductors could help in improving the photovoltaic response and vice versa. In this context, the present study aims to provide an insight into light-induced changes in the ferroelectric behavior of KNN-BNNO. Recent demonstration of light-driven switching of nanodomains in (K 0.5 Na 0.5 )NbO 3 also makes it interesting to further explore KNN-BNNO. [30] Light-induced changes in ferroelectrics could persist due to a number of reasons such as (i) localized heating assisted diffusion of alkali element (as in LiNbO 3 ) and oxygen vacancies, [31] (ii) change in oxidation state of the central atom (e.g., in BaTiO 3 ), [32] and (iii) Jahn-Teller distortions due to light-induced pyroelectric current or charge injection in the conduction band (as in SbSI). [7,13] Warren et al. suggested that similar to electrical and thermal fluctuations, an exposure to light involves "locking domains by electronic charge trapping at domain boundaries." [1] Any change in the macroscopic behavior could be attributed to nanoscale changes in the ferroelectric domains. Moreover, Domain wall nanoelectronics constitutes a potential paradigm shift for nextgeneration energy conversion and von-Neumann devices. In this context, attempts have been made to achieve energy-efficient control over ferromagnetic, ferroelectric, and ferroelastic domain walls through electric and magnetic fields or applied stress. However, optical control of ferroic domains offers an additional degree of freedom and significant advantages of reduced hysteresis and Joule heating losses, creating novel opport...

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“…It has been demonstrated that doping may also efficiently regulate the properties of BFO, including densities, bandgap, and leakage currents. [68,[81][82][83][84] Xu et al found that the bandgap of BFO could be reduced to 1.1 eV by B-site doping Mn element, as shown in Figure 3a. [85] Ionic substitutions, especially co-substitution of A-site and B-site in perovskite ferroelectric materials are getting more and more popular.…”

Section: Ionic Dopingmentioning

confidence: 97%

Ferroelectric Photovoltaic Materials and Devices

Han

Yang

2021

Adv Funct Materials

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Ferroelectric materials have been a focus of much research over the last few decades for their unique piezoelectric and optoelectronic properties. Conventional solar cells have been devised based on the photovoltaic effect of semiconductor p–n junctions, with their photogenerated voltage being influenced by the bandgap of the semiconductors, limiting their further development. Ferroelectric photovoltaics have attracted attention for their unusual photovoltaic effect and controllability. The photogenerated voltage that is independent of bandgap along the polarization direction can be generated in ferroelectric materials, undoubtedly making up for the lack of solar cells. Ferroelectric materials have been used in a wide range of piezoelectric, storage, sensor, and optoelectronic because of their unique optical and electrical properties. However, the small photogenerated current of ferroelectric photovoltaic devices is one of the challenges that need to be overcome. Researchers have shown that the photogenerated current of ferroelectric photovoltaic devices can be significantly improved by cation doping and heterostructure construction, reigniting the enthusiasm for the investigation of ferroelectric photovoltaics. This paper reviews a variety of ferroelectric photovoltaic materials, the mechanism of ferroelectric photovoltaics, approaches for improving ferroelectric photovoltaic performance, and the applications and future prospects for ferroelectric materials.

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The photoinduced Rayleigh scattering in BaTiO3 crystals showing the bulk photovoltaic effect

Cited by 29 publications

References 6 publications

Photovoltaics with Ferroelectrics: Current Status and Beyond

Photovoltaics with Ferroelectrics: Current Status and Beyond

Optical Control of Ferroelectric Domains: Nanoscale Insight into Macroscopic Observations

Ferroelectric Photovoltaic Materials and Devices

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