An antenna/spacer/reflector based Au/BiVO4/WO3/Au nanopatterned photoanode for plasmon-enhanced photoelectrochemical water splitting

Chen, Bin; Zhang, Zhuo; Baek, Minki; Kim, Sang-Kuk; Kim, Wooyul

doi:10.1016/j.apcatb.2018.06.048

Cited by 72 publications

(44 citation statements)

References 47 publications

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“…N‐type semiconductors are usually used as photoanodes for the oxygen evolution reaction (OER) in the process of PEC water splitting, while single n‐type semiconductors tend to exhibit poor surface water oxidation kinetics . Oxygen evolution co‐catalysts (OECs) have been introduced onto photoanodes to improve the rate of oxygen generation . OECs can effectively lower the activation energy of the surface OER or passivate the surface charge recombination centers of the semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Zhang

et al. 2019

Adv Funct Materials

121

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In this work, a water splitting photoanode composed of a BiVO 4 thin film surface modified by the deposition of a rhodium (Rh)-doped SrTiO 3 perovskite is fabricated, and the Rh-doped SrTiO 3 outer layer exhibits special photoelectrochemical (PEC) oxygen evolution co-catalytic activity. Controlled intensity modulated photo-current spectroscopy, electrochemical impedance spectroscopy, and other electrochemical results indicate that the Rh on the perovskite provide an oxidation active site during the PEC water oxidation process by reducing the reaction energy barrier for water oxidation. Theoretical calculations indicate that the water oxidation reaction is more likely to occur on the (110) crystal plane of Rh-SrTiO 3 because the oxygen evolution reaction overpotential on the (110) crystal plane is reduced significantly. Therefore, the obtained BiVO 4 /Rh5%-SrTiO 3 photoanode exhibits an optimized PEC performance. In particular, it facilitates the saturation of the photocurrent density. Thus, the presence of doped Rh in SrTiO 3 can reduce the amount of noble metals required while achieving excellent and stable oxygen evolution properties.

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Section: Introductionmentioning

confidence: 99%

Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Zhang

et al. 2019

Adv Funct Materials

121

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“…Thus, a hybrid design that combines cavity enhanced strong interference and scaffold enhanced light trapping is an elegant way to boost the activity of a thin film based photoconversion system. A recent paper demonstrated an efficient PEC‐WS photoanode where a WO 3 /BiVO 4 double layer is sandwiched with an Au nanosphere trapping scheme on bottom, and Au nanoparticles on top . Thus, the structure can benefit from multiple light trapping mechanisms including strong interference of MIS cavity, scaffold induced light trapping, and top gold nanoparticles originated gap plasmon excitation.…”

Section: Light Trapping Schemesmentioning

confidence: 99%

Semiconductor Thin Film Based Metasurfaces and Metamaterials for Photovoltaic and Photoelectrochemical Water Splitting Applications

Ghobadi

Özbay

2019

Advanced Optical Materials

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throughput and large-scale compatibility. The photoactive material is generally composed of single or multiple semiconductor layers responsible for harvesting solar energy. This harvested solar irradiation can be used to generate electricity using photovoltaic (PV) devices, or it can be converted to chemical energy in the form of hydrogen which is the case for photoelectrochemical water splitting (PEC-WS). In both PV and PEC-WS applications, the ultimate goal is to establish an efficient photon capturing and electron collecting scheme to generate a huge number of photocarriers (including electron-hole pairs) with rational carrier dynamics (efficient charge generation, separation, and collection). This means that the device should be optically thick enough to generate high carrier's density and electrically thin enough to collect photogenerated carrier before they recombine. When light impinges a semiconductor surface, a part of the light is reflected back due to the mismatch between the air and the semiconductor layer refractive index. The rest will propagate within the bulk until it is fully absorbed by the semiconductor slab. The optical penetration depth (LPD) is defined as the depth at which the incident power falls to 1/e (≈37%) of its input value. This parameter differs from one semiconductor to another and it depends on the extinction coefficient (κ) of the In both photovoltaic (PV) and photoelectrochemical water splitting (PEC-WS) solar conversion devices, the ultimate aim is to design highly efficient, low cost, and large-scale compatible cells. To achieve this goal, the main step is the efficient coupling of light into active layer. This can be obtained in bulkysemiconductor-based designs where the active layer thickness is larger than light penetration depth. However, most low-bandgap semiconductors have a carrier diffusion length much smaller than the light penetration depth. Thus, photogenerated electron-hole pairs will recombine within the semiconductor bulk. Therefore, an efficient design should fully harvest light in dimensions in the order of the carriers' diffusion length to maximize their collection probability. For this aim, in recent years, many studies based on metasurfaces and metamaterials were conducted to obtain broadband and near-unity light absorption in subwavelength ultrathin semiconductor thicknesses. This review summarizes these strategies in five main categories: light trapping based on i) strong interference in planar multilayer cavities, ii) metal nanounits, iii) dielectric units, iv) designed semiconductor units, and v) trapping scaffolds. The review highlights recent studies in which an ultrathin active layer has been coupled to the above-mentioned trapping schemes to maximize the cell optical performance.

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“…Although one of the most successful semiconductors—for plasmonic PEC‐WS—is titanium dioxide (TiO 2 ), mainly owing to its chemical stability, earth abundance, and cost effectiveness; however, it suffers from a poor absorption response that only covers the ultraviolet (UV) portion of the solar spectrum. Therefore, in recent years, extensive attempts have been made for the design and realization of plasmonic coupled low band gap metal oxides for driving water oxidation and reduction reactions . By decorating plasmonic deep sub‐wavelength nanoparticles on a semiconductor, near field effects and hot electron injection can simultaneously contribute to the overall activity of the cell.…”

Section: Introductionmentioning

confidence: 99%

“…The formation of Fabry–Perot (FP) resonance modes in the metal‐semiconductor nanocavity is the main mechanism in these architectures to harvest solar irradiation. Some recent works have proposed innovative hybrid schemes that take advantage of using both FP resonances (supported by the Au reflector in a nanocavity) and LSPRs (through the use of plasmonic nanoparticles) to achieve the high‐performance photoanode in PEC‐WS systems …”

Section: Introductionmentioning

confidence: 99%

Strong Light–Matter Interactions in Au Plasmonic Nanoantennas Coupled with Prussian Blue Catalyst on BiVO₄ for Photoelectrochemical Water Splitting

Ghobadi

Soydan

et al. 2020

ChemSusChem

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A facial and large‐scale compatible fabrication route is established, affording a high‐performance heterogeneous plasmonic‐based photoelectrode for water oxidation that incorporates a CoFe–Prussian blue analog (PBA) structure as the water oxidation catalytic center. For this purpose, an angled deposition of gold (Au) was used to selectively coat the tips of the bismuth vanadate (BiVO4) nanostructures, yielding Au‐capped BiVO4 (Au‐BiVO4). The formation of multiple size/dimension Au capping islands provides strong light–matter interactions at nanoscale dimensions. These plasmonic particles not only enhance light absorption in the bulk BiVO4 (through the excitation of Fabry–Perot (FP) modes) but also contribute to photocurrent generation through the injection of sub‐band‐gap hot electrons. To substantiate the activity of the photoanodes, the interfacial electron dynamics are significantly improved by using a PBA water oxidation catalyst (WOC) resulting in an Au‐BiVO4/PBA assembly. At 1.23 V (vs. RHE), the photocurrent value for a bare BiVO4 photoanode was obtained as 190 μA cm−2, whereas it was boosted to 295 μA cm−2 and 1800 μA cm−2 for Au‐BiVO4 and Au‐BiVO4/PBA, respectively. Our results suggest that this simple and facial synthetic approach paves the way for plasmonic‐based solar water splitting, in which a variety of common metals and semiconductors can be employed in conjunction with catalyst designs.

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An antenna/spacer/reflector based Au/BiVO4/WO3/Au nanopatterned photoanode for plasmon-enhanced photoelectrochemical water splitting

Cited by 72 publications

References 47 publications

Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Semiconductor Thin Film Based Metasurfaces and Metamaterials for Photovoltaic and Photoelectrochemical Water Splitting Applications

Strong Light–Matter Interactions in Au Plasmonic Nanoantennas Coupled with Prussian Blue Catalyst on BiVO₄ for Photoelectrochemical Water Splitting

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An antenna/spacer/reflector based Au/BiVO4/WO3/Au nanopatterned photoanode for plasmon-enhanced photoelectrochemical water splitting

Cited by 72 publications

References 47 publications

Improvement of BiVO4 Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO3 Perovskite as a Co‐Catalyst

Improvement of BiVO4 Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO3 Perovskite as a Co‐Catalyst

Semiconductor Thin Film Based Metasurfaces and Metamaterials for Photovoltaic and Photoelectrochemical Water Splitting Applications

Strong Light–Matter Interactions in Au Plasmonic Nanoantennas Coupled with Prussian Blue Catalyst on BiVO4 for Photoelectrochemical Water Splitting

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Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Improvement of BiVO₄ Photoanode Performance During Water Photo‐Oxidation Using Rh‐Doped SrTiO₃ Perovskite as a Co‐Catalyst

Strong Light–Matter Interactions in Au Plasmonic Nanoantennas Coupled with Prussian Blue Catalyst on BiVO₄ for Photoelectrochemical Water Splitting