Passive high ratio sunlight concentration configurations

Rudnitsky, Arkady; Zaban, Arie; Zalevsky, Zeev

doi:10.2971/jeos.2013.13033

Cited by 3 publications

(1 citation statement)

References 15 publications

(7 reference statements)

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“…Figure S12 shows a possible structure of the module that accommodates O 2 and H 2 collecting tranches fitted with the PEC-PV tandem and the Pt counter electrode, respectively, and with hemispherical light concentrators on the top of the module. Other types of optical concentrators that are already developed in the field of low concentration photovoltaics (low-CPV) can also be used to enable non-tracking operation 42 .…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic generation of hydrogen by core-shell WO3/BiVO4 nanorods with ultimate water splitting efficiency

Pihosh

Turkevych

Mawatari

et al. 2015

Sci Rep

502

455

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Efficient photocatalytic water splitting requires effective generation, separation and transfer of photo-induced charge carriers that can hardly be achieved simultaneously in a single material. Here we show that the effectiveness of each process can be separately maximized in a nanostructured heterojunction with extremely thin absorber layer. We demonstrate this concept on WO3/BiVO4+CoPi core-shell nanostructured photoanode that achieves near theoretical water splitting efficiency. BiVO4 is characterized by a high recombination rate of photogenerated carriers that have much shorter diffusion length than the thickness required for sufficient light absorption. This issue can be resolved by the combination of BiVO4 with more conductive WO3 nanorods in a form of core-shell heterojunction, where the BiVO4 absorber layer is thinner than the carrier diffusion length while it’s optical thickness is reestablished by light trapping in high aspect ratio nanostructures. Our photoanode demonstrates ultimate water splitting photocurrent of 6.72 mA cm−2 under 1 sun illumination at 1.23 VRHE that corresponds to ~90% of the theoretically possible value for BiVO4. We also demonstrate a self-biased operation of the photoanode in tandem with a double-junction GaAs/InGaAsP photovoltaic cell with stable water splitting photocurrent of 6.56 mA cm−2 that corresponds to the solar to hydrogen generation efficiency of 8.1%.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic generation of hydrogen by core-shell WO3/BiVO4 nanorods with ultimate water splitting efficiency

Pihosh

Turkevych

Mawatari

et al. 2015

Sci Rep

502

455

View full text Add to dashboard Cite

show abstract

Tunable prism based upon novel piezoelectric nanoparticle/sol-gel design used for active solar cells concentrators

Rachamim¹,

Ritenberg²,

Jelinek³

et al. 2019

Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIII

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Numerical Investigation on the Solar Absorption Performance of Plasmonic Nanoparticles in the Focused Electric Field

Zhang,

Bai,

Zhang

et al. 2024

Energies

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Planar light concentrators are potential applications for solar thermal conversion, in which the intensity of the electric field will exhibit strongly non-uniform characteristics. However, previous research has long ignored the solar absorption performance of plasmonic nanoparticles in the focused electric field. In this work, we use the finite element method (FEM) to study the optical behaviors of a single nanoparticle and multiple nanoparticles in the focused electric field formed by vertically and inwardly imposing the initial incident light on a quarter cylindrical surface. The results show that the focused electric field can significantly improve the solar absorption abilities compared with the parallel one for all the nanoparticles due to the local near-electric field enhancement caused by the aggregation of the free electrons on the smaller zone. Further studies on the focused electric field reveal that the plasmon heating behavior of Au spheres presents a rising trend with the decrease in inter-particle spacing, as the gap is less than the radius of Au spheres. As the number of nanoparticles increases along the focal line, the absorption power of the center nanoparticles gradually tends to be stable, and it is much lower than that of a single nanoparticle. As the nanoparticles are arranged along the y and z directions, the heterogeneity of the electric field makes the optical properties uneven. Notably, the strongest electric field appears slightly close to the incident surface rather than on the focal line.

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Passive high ratio sunlight concentration configurations

Cited by 3 publications

References 15 publications

Photocatalytic generation of hydrogen by core-shell WO3/BiVO4 nanorods with ultimate water splitting efficiency

Photocatalytic generation of hydrogen by core-shell WO3/BiVO4 nanorods with ultimate water splitting efficiency

Tunable prism based upon novel piezoelectric nanoparticle/sol-gel design used for active solar cells concentrators

Numerical Investigation on the Solar Absorption Performance of Plasmonic Nanoparticles in the Focused Electric Field

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