Anomalous bulk photovoltaic effect in ferroelectrics: A quadratic response theory

Kraut, Wolfgang; Baltz, R. v.

doi:10.1103/physrevb.19.1548

Cited by 163 publications

(156 citation statements)

References 25 publications

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“…Experimentally, a wide variety of such materials have been proved experimentally to exhibit a BPVE, including non-ferroelectric materials such as GaP, Te, ZnO or HgS. [26] The BPVE photovoltaic current has been historically and phenomenologically expressed in terms of microscopic quantities as: [24] sc α ω ω ξ ω ( )…”

Section: Reviewmentioning

confidence: 99%

“…[7] To understand this phenomenon, the bulk photovoltaic effect (BPVE) has to be described with a third-rank tensor as a second-order optical response. [10,[23][24][25] In a non-centrosymmetric material under an incident electromagnetic plane wave E inc of frequency ω, wavevector k, unit polarization vector e, and amplitude E 0 : …”

Section: From the 1950s To The Present: A Brief Review Of The Models mentioning

confidence: 99%

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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: 99%

Section: From the 1950s To The Present: A Brief Review Of The Models mentioning

confidence: 99%

Photovoltaics with Ferroelectrics: Current Status and Beyond

et al. 2016

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“…Как показали Ли и Янг, электроны, образующиеся при β-распаде нейтрона, η ->• ρ + е + ν, в присутствии магнитного поля Η должны обладать асимметрией распре-деления, т. е. в направлении ηΗ, где η -псевдоскаляр, должен возни-кать ток, характеризующий нецентросимметричность нашего простран-ства. Именно этот эффект и наблюдался в экспериментах By на ядрах Со 60 при Τ « Ю-2 К 33 . В предлагаемом обзоре мы хотим познакомить читателя с общими свойствами нового эффекта, основными его механизмами, а также указать связи ФГЭ с другими физическими явлениями.…”

Section: K = Wv -V (14)unclassified

“…Иными словами, ФГЭ связан с реальным поглощением света, а без учета диссипативных процессов он невозможен. Отметим, что недооценка описанной выше ком-пенсации привела авторов 5 > 17 , 59 , 60 к ошибочному выводу о возможности ФГЭ в отсутствии соударений. Отсутствие тока в пренебрежении соуда-рениями естественно согласуется и с простыми представлениями о невоз-можности поддержания упорядоченного состояния системы в полном отсутствии диссипативных процессов.…”

Section: внутризонные переходыunclassified

The photogalvanic effect in media lacking a center of symmetry

Belinicher¹,

Sturman²

1980

Uspekhi Fizicheskikh Nauk

205

142

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“…Bulk polarization is not required; only inversion symmetry must be broken. Shift currents have been investigated experimentally [19,[27][28][29][30][31][32][33][34], analytically [20,23,[35][36][37], and computationally, although only for a few nonpolar materials [23][24][25]. Perturbative analysis treating the electromagnetic field classically yields the shift current expression [20,23] J q ¼ rsq E r E s rsq ð!Þ ¼ e e m@!…”

Section: First Principles Calculation Of the Shift Current Photovoltamentioning

confidence: 99%

First Principles Calculation of the Shift Current Photovoltaic Effect in Ferroelectrics

2012

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We calculate the bulk photovoltaic response of the ferroelectrics BaTiO 3 and PbTiO 3 from first principles by applying "shift current" theory to the electronic structure from density functional theory. The first principles results for BaTiO 3 reproduce eperimental photocurrent direction and magnitude as a function of light frequency, as well as the dependence of current on light polarization, demonstrating that shift current is the dominant mechanism of the bulk photovoltaic effect in BaTiO 3 . Additionally, we analyze the relationship between response and material properties in detail. The photocurrent does not depend simply or strongly on the magnitude of material polarization, as has been previously assumed; instead, electronic states with delocalized, covalent bonding that is highly asymmetric along the current direction are required for strong shift current enhancements. The complexity of the response dependence on both external and material parameters suggests applications not only in solar energy conversion, but to photocatalysis and sensor and switch type devices as well.

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Anomalous bulk photovoltaic effect in ferroelectrics: A quadratic response theory

Cited by 163 publications

References 25 publications

Photovoltaics with Ferroelectrics: Current Status and Beyond

Photovoltaics with Ferroelectrics: Current Status and Beyond

The photogalvanic effect in media lacking a center of symmetry

First Principles Calculation of the Shift Current Photovoltaic Effect in Ferroelectrics

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